documents.worldbank.orgdocuments.worldbank.org/curated/pt/... · THE PEOPLE'S COMMIlTEE OF HO CHI...

THE PEOPLE'S COMMIlTEE OF HO CHI M INH CITY PROJECT MANAGEMENT UNIT OF URBAN UPGRADING

VIETNAM URBAN UPGRADING PROJECT (VUUP) HO CHI MINH CITY SUB-PROJECT

E817 VOL. 20

ENVIRONMENTAL IMPACT ASSESSMENT REPORT

SECTORIAL PROJECT NO. 4

IMPROVEMENT OF CANAL, EMBANKMENT AND ROADS ALONG

TAN HOA - LO GOM CANAL LOCATION: DISTRICT NO. 6, DISTRICT NO. 11 AND TAN PHU DISTRICT

HOCHlMlNH CITY - 0512009

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THE PEOPLE'S COMMITTEE OF HO CHI MLNH CITY PROJECT MANAGEMENT UNIT OF URBAN UPGRADING

VIETNAM URBAN UPGRADING PROJECT (VUUP) HO CHI MINH CITY SUB-PROJECT

ENVIRONMENTAL IMPACT ASSESSMENT REPORT

SECTORIAL PROJECT NO. 4

IMPROVEMENT OF CANAL, EMBANKMENT AND ROADS ALONG

TAN HOA - LO GOM CANAL LOCATION: DISTRICT NO. 6, DISTRICT NO. 11 AND TAN PHU DISTRICT

HOCHlMlNH CITY - 0512009

Environmental Impact Assessment Report: VietNam Urban Upgrading Project . Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal. Embankment and Roads Along Tan Hoa . Lo Gom Canal

TABLE OF CONTENTS TABLE OF CONTENTS .................................................................................................................... 1

................................................................................................................................ CHAPTER ONE 1 INTRODUCTION ............................................................................................................................. 1

................................................................................................ 1.1. BACKGROUND OF PROJECT 1 ........................................................................................ 1.2. OaTECTIVES OF THE EL4 STUDY 2 ..................................................... . 1 3 ENVIRONMENTAL LEGISLATION AND GUIDELINES 2

.................................................................. 1.3.1. World Bank Policy on Environmental Assessment 2 .................. 1.3.2. Vietnamese Policy and Administrative Framework on Environmental Assessment 3

................................................................. 1.3.3. VULPHC status and Other Projects in project area 5 1.3.3.1. VUUPHC status and phasing ........................................................................................ 5

................................................................ 1.3.3.2. Other relevant Projects in THLG project area 6 ............................................................................................ 1.4. APPLIED EL4 METHODOLOGY 6

1.5. IMPLEMENTATION ORGANIZATION ................................................................................. 7

CHAPTER TWO ............................................................................................................................... 8 PROJECT DESCRIPTION ............................................................................................................... 8

2.1. INTRODUCTION TO THE PROJECT ..................................................................................... 8 2.2. GENERAL DESCRIPTION OF SECTORIAL PROJECT NO . 4 ............................................ 8 . ...................................................................... 2 3 . FINAL DESIGN OF Sectorial PROJECT No 4 13

.......................................................................................................... . 2.3.1 Canal Bank Protection 13 ............................................................................................................... 2.3.1.1. Canal Sections 13

............................................................................................ 2.3.1.2. Designed Channel Gradient 13 ................................................................................................................ 2.3.2. Roads and Bridges 15

............................................................................................................................ 2.3.2.1. Roads 15 .......................................................................................................................... 2.2.2.2. Bridges 15

........................................................................................ 2.3.3. Miscellaneous and ancillary works 18 ................................................................. 2.3.3.1. Street and Roadway Lighting in Urban Areas 18

2.2.3.2. Signage ........................................................................................................................ 19 ......................................................................................... 2.2.3.3. Space Allocation for Utilities 19

.................................................................. 2.2.4. Combined Sewer Overflow and Pumping station 20 2.2.4.1. Combined Sewer Overflow (CSO) Diversion Structures ................................................. 20 2.2.4.2. Interceptor Sewers ....................................................................................................... 24

2.4. RECOMMENDED TENDER AND CONTRACT PACKAGING ................................ .. ..... .. 25 2.5. DREDGING TECHMCAL AND CONSTRUCTION PROCESS ........................................ 28

2.5.1. Dredging Technical .......................................................................................................... 28 2.5.2. Embankment construction process ........................................................................................ 28

2.6. VISION OF HUUPMU ON THLG CANAL IMPROVEMENT PROJECT ........................... 33

......................................................................................................................... CHAPTER THREE 34 ........................................................................................................................... BASELINE DATA 34

....................................................................................................... 3.1. PHYSICAL RESOURCES 34 ................................................................................................................................. 3.1.1. Climate 34

3.1.1.1 Radiation ........................................................................................................................ 34 ............................................................................................... 3.1.1.2 Atmospheric Temperature 34

...................................................................................... 3.1.1.3 Relative Atmospheric Humidity 35 3.1.1.4. Rainfall .......................................................................................................................... 36 3.1.1.5 Wind regime ................................................................................................................... 36

3.1.2. Topography ........................................................................................................................ 37 3.1.3. Soil condition ...................................................................................................................... 37

............................................................................................................................ 3.1.4. Hydrology 37 .................................................................................. 3.1.4.1. Tan Hoa -Lo Gom Canal System 37

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Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC .

Environmental Impact Assessment Report: VietNarn Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal. Embankment and Roads Along Tan Hoa - Lo Gom Canal

................................................................................. 3.1.4.2. Description of the drainage system 41 .............. 3.2. SOCIO-ECONOMIC CONDITION IN SP.04 AREA STUDIED IN MARCH 2009 45

. ..................................................................................................... 3 3 PROJECT AREA SURVEY 48 ............................................................................................................ 3.3.1. Project Route Profile 48

3.3.2. Sensitive receiver ................................................................................................................. 48 ................................. 3.4. EXISTING ENVIRONMENTAL CONDITION OF PROJECT AREA 49 3.4.1. Surface Water Quality .......................................................................................................... 49

3.4.1.1. Surhce Water Quality of Tan Hoa - Lo Gom Canal downstream canals ......................... 49 3.4.1.2. Water Quality at sludge disposal site .............................................................................. 52

....................................................................................... 3.4.2. THLG Ground Water Quality Data 53 ................................. 3.4.3. Tan Hoa - Lo Gom Canal Sediment Quality and Garbage in Sediment 53

3.4.3.1. Sediment Quality ........................................................................................................... 53 ............................................................................................................ 3.4.3.2. Garbage in canal 54

........................................................... 3.4.4. Existing Wastewater Discharges to the TH-LG Canal 55 3.4.5. Air Quality and Noise in Tan Hoa - Lo Gom Canal Basin ..................................................... 56 3.4.6. Ecological resource ............................................................................................................. 57

CHAPTER FOUR ............................................................................................................................ 59 ASSESSMENT OF TEIE POTENTIAL ENVIRONMENTAL IMPACTS ................................. 59 OF TEIE PROJECT ......................................................................................................................... 59

4.1. IMPACTS IDENTIFICATION AND CLASSIFICATION .................................................. 59 4.1.1. Positive impacts .................................................................................................................... 59 4.1.2. Negative impacts .................................................................................................................. 59

4.2. IMPACT ASSESSMENT IN PROJECT DESIGN AND PRE-CONSTRUCTION PHASE .. 61 .......................................................... 4.2.1. Soci@economic impacts by encroachment on land use 61

............................................................................................. 4.2.2. Encroachment on cultural sites 61 ....................................................... 4.3. IMPACT ASSESSMENT IN CONSTRUCTION PHASE 64

......................................................................................................... 4.3.1. Impacts on Air Quality 64 .................................................. 4.3.1.1. Air pollution due to figitive dust construction vehicles 64

............................................................ 4.3.1.2. Exhausted gases and figitive dust fiom vehicles 65 4.3.1.3. Air pollution due to exhausted gases fiom barges and trucks used in process of disposal of dredged material ......................................................................................................................... 66

.................................. 4.3.1.4. Air pollution caused by odour compounds fiom dredged material 67 .................................................... 4.3.2. Noise and vibration impacts during the construction phase 68

4.3.2.1. Noise Impact ................................................................................................................. 68 ............................................................................................................ 4.3.2.2. Vibration Impact 69

4.3.3. Impacts on surface water quality ........................................................................................... 69 4.3.3.1 . Impacts on surface water quality caused by dredging activity ......................................... 69

....................................... 4.3.3.2. Impacts caused by transport and disposal of dredged materials 71 4.3.3.3. Impacts caused by domestic waste fiom construction camp ........................................ 72

4.3.4. Impacts caused by dredged and excavated materials .............................................................. 73 4.3.5. Impacts caused by solid waste .............................................................................................. 75

4.3.5.1. House demolishment waste ........................................................................................... 75 4.3.5.2. Construction waste ......................................................................................................... 75

4.3.6. Impacts on transportation system .......................................................................................... 75 4.3.7. Impacts on cultural and social environment ........................................................................... 76 4.3.8. Some hazards and risks related to construction activities ....................................................... 76

4.4. IMPACT ASSESSMENT IN OPERATION PHASE ........................................................... 77 4.4.1. Impacts on air quality and noise .......................................................................................... 77

..................................................................... 4.4.2. Impacts on TH-LG canal surface-water quality 77 4.4.2.1. Pollution caused by discharging wastewater .................................................................. 77 4.4.2.2. Pollution caused by municipal solid waste ...................................................................... 78

4.4.3. Impact on surface water quality of Tau Hu Canal ................................................................. 78 4.4.4. Drainage and Flood Control - Operation Phase ..................................................................... 80

11

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 5 Phung Khac Khoan. Dakao Ward. District 1. HCMC .

Environmental Impact Assessment Report: VietNam Urban Upgrading Project . Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal. Embankment and Roads Along Tan Hoa . Lo Gom Canal

4.4.5. Impacts on cultural and social environment ........................................................................... 80 4.4.5.1. Increase in traffic density ............................................................................................... 80 4.4.5.2. Increase in traffic accident ............................................................................................ 80 4.4.5.3. Impacts on urban landscape ........................................................................................... 80

4.4.6. Impacts on economic environment ..................................................................................... 80 4.5. INTEGRATED IMPACT ASSESSMENT ............................................................................... 81

4.5.1. Impact assessment integrated with other projects .................................................................. 81 4.5.2. Impact assessment integrated with other component of the project ........................................ 82

..................................................................... 4.5.3. Impact assessment on alternative of the project 82 4.5.4. Impact assessment on alternative of the Sectoral Project No.4 and CSO&WWTP ................. 85

4.6. ENVIRONMENT IMPACT ASSESSMENT USING RIAM MODEL ................................... 86

CHAPTER FIVE ............................................................................................................................. 88 MITIGATION MEASURES FOR NEGATIVE IMPACTS .......................................................... 88

................ 5.1. MITIGATION MEASURES IN DESIGN AND PRE-CONSTRUCTION PHASE 88 5.1 . 1. Generic design instructions ................................................................................................... 88

............................................................................... 5.1.2. Designing with community participation 88 5.1.3. Limitation in encroachment on land-use and cultural sites ..................................................... 89

............................................................................... 5.1.4. Compensation and resettlement program 89 5.1.5. Control of pollution due to site preparation ........................................................................... 90

5.2. MITIGATION MEASURES PROPOSED IN CONSTRUCTION PHASE ............................ 90 .............................................................................................. 5.2.1. Air pollution control measures 90

5.2.2. Control Noise and vibration ................................................................................................. 91 5.2.2.1. Noise ............................................................................................................................. 91

....................................................................................................................... 5.2.2.2. Vibration 95 5.2.3. Mitigation measures for the impacts on surface water quality ................................................ 96

5.2.3.1. Impacts caused by domestic waste fiom construction workers ........................................ 96 5.2.3.2. Control waste oil fiom maintenance process ............................................................. 96

5.2.4. Mitigation measures for dredging activity ............................................................................. 96 5.2.4.1. Management and regulation of dredging activities and dredged material ............................ 96 5.2.4.2. Mitigation measures for dredging ...................................................................................... 98 5.2.4.3. Mitigation measures for transportation ............................................................................... 99

5.2.4.4. Mitigation measures for disposal of dredged materials ............................................... 104 5.2.5. Mitigation measures for impacts of other kinds of solid wastes ........................................... 108 5.2.6. Mitigation measures for impacts on traffic system .............................................................. 108 5.2.7. Plan to remove related infrastructures in project area ........................................................ 109 5.2.8. Other mitigation measures for other impacts ....................................................................... 110

5.2.8.1. Conflicts between workers and workers, worker and local people ................................. 110 5.2.8.2. Health and occupational safety ..................................................................................... 110 5.2.8.3. Restriction of impacts on landscape, aesthetics and living quality in the construction sites ............................................................................................................................................. 111

5 3 . MITIGATION MEASURES OF NEGATIVE IMPACT in operation phase ....................... 111 5.3.1. Protection of air quality and noise environment ................................................................... 111 5.3.2. Protection of surface water quality of Tan Hoa - Lo Gom canal .......................................... 112

5.3.2.1. Proposals for protection of water quality of Tan Hoa - Lo Gom canal .......................... 112 5.3.2.2. Proposals for improvement of water quality of Tan Hoa - Lo Gom canal ..................... 112

5.3.4. Other mitigation measures .................................................................................................. 112

.............................................................................................................................. CHAPTER SIX 113 .......................................................................................................... PUBLIC CONSULTATION 113

............................................................. 6.1. THE OBJECTIVE OF PUBLIC CONSULTATION 113 6.2. PUBLIC CONSULTATION CONDUCTED BY CEECO 2 . 2009 ........................................ 113

...................... 6 3 . PUBLIC CONSULTATION FOR RELIGION SITES IN PROJECT AREA 115

111

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMLT) 5 Phung Khac Khoan. Dakao Ward. District 1. HCMC .

Environmental Impact Assessment Report: VietNam Urban Upgrading Project . Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa . Lo Gom Canal

6.4. PUBLIC DISCLOSURE ......................................................................................................... 115

CHAPTER SEVEN ........................................................................................................................ 116 ENVIRONMENTAL MANAGEMENT PLAN ............................................................................ 116

7.1. ORGANIZATION OF ENVIRONMENTAL MANAGEMENT AND RESPONSIBILITY 116 7.2. TRAJNING PROGRAM ......................................................................................................... 119 7.3. PUBLIC INFORMATION PROGRAM AND COMMUNITY RELATION ........................ 120 7.4. MITIGATION MEASURE PLAN ......................................................................................... 120

7.4.1. Summarized plan for mitigation measures during three principal stages .............................. 120 7.4.2. Safety. Health. Environment & Transport program ............................................................. 125 7.4.3. Proposal measures for Sensitive Receptors .................................................................... 126

7.5. ENVIRONMENTAL MONITORING PROGRAM .............................................................. 127 7.6. REPORTING .......................................................................................................................... 129 7.7. ESTIMATION OF COST FOR APPLYING ENVIRONMENTAL MANAGEMENT PROGRAM AND MONITORING ............................................................................................... 129

CONCLUSIONS ............................................................................................................................ 133

REFERENCES .............................................................................................................................. 134

ANNEXES OF ENVIRONMENTAL IMPACT ASSESSMENT REPORT ................................ 135

ANNEX 2.1 . THE CROSS-SECTIONS OF TYPICAL OF BANK PROTECTION .................. 136 ANNEX 2.2 . RECOMMENDED TYPICAL ROAD SECTIONS AND ITS CORRESPONDING PAVEMENT STRUCTURE .......................................................................................................... 140 ANNEX 3.1 -DETAIL PROFILE ALONG PROJECT ROUTE ................................................ 146

................... ANNEX 3.3 - TAN HOA-LO GOM CANAL SEDIMENT QUALITY ANALYSIS 155 ANNEX 3.4 - MONITORED AIR QUALITY - TAN HOA-LO GOM (NOVEMBER 2002) .... 156 ANNEX 4.1 - CALCULATION FOR AIR POLLUTANTS OF EXHAUSTED GASES FROM BARGES AND TRUCKS USED IN PROCESS OF DISPOSAL OF DREDGED MATERIAL . 157 ANNEX 4.2 . THE DETAIL CALCULATION FOR NOISE IMPACT ASSESSMENT ............ 160 ANNEX 4.3 - DETAIL OF VIBRATION IMPACT ..................................................................... 166 ANNEX 4.4 - THE SIMULATION OF DREDGE RE-SUSPENSION AND CONTAMINANT TRANSPORT MODEL ................................................................................................................. 169 ANNEX 4.5 - CALCULATION OF CONTAMINATED SLUDGE ............................................ 173 ANNEX 4.6 . MAXIMUM CONTAMINANT CONCENTRATIONS ALLOWED IN SOIL TO BE DISPOSED OF AS CATEGORY C AND D ........................................................................... 175 ANNEX 4.7 - ESMATES WASTEWATER FLOW AND LOAD DISCHARGED FROM THLG BASIN ............................................................................................................................................ 176 ................. ANNEX 4.8 . ENVIRONMENT IMPACT ASSESSMENT USING RIAM MODEL 179 ANNEX 5.1 . DESCRIPTION ON SLUDGE TREATMENT PROCESS OF DA PHUOC PLANT ........................................................................................................................................................ 188 ANNEX 6.1 . THE RESULTS OF PUBLIC CONSULTATION CONDUCTED BY CEECO .

iv Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMLT) 5 Phung Khac Khoan. Dakao Ward. District 1. HCMC .

Environmental Impact Assewmeat Report: VietNam Urban Upgrading Project . Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal. Embankmerd and Roads Along Tan Hoa . Lo Gom Canal

LIST OF TABLES

Table 1.1 . Vietnamese environmental standards ........................................................................................................ 3 ................................................................................................. . Table 1.2 W H C status and phasing is presented 5

......................................................................... Table 1.3 . Other relevant Projects in THLG project area is presented 6

............................................................................ Table 1.4 -The list of members partaking in the EM is given below 7 ............................................................................................ List of NewIExisting Bridges for Removal/Replacement 9

............................................................................. Estimate contaminated sludge volume in the bed of TH-LG canal 10

Table 2.1 . Canal Bank Protection ............................................................................................................................ 13 ......................................................................... Table 2.2 . List ofNew~Existing Bridges for RemovaVReplacement 16

................................................................................................................ Table 2.3 . Minimum Illumination Levels 18 ................................................................................................................. Table 2.4 . ?he uniformity of the lighting 18

Table 2.5 . Sizing of Proposed Interceptor Sewers .................................................................................................... 24 Table 2.6 . Proposed construction schedule improvement of canel, embankment. and roads along TanHoa-LoGom Canal ..................................................................................................................................................................... 27 Table 3.1 . Number of annual sunshine hours of 2000.2007 ..................................................................................... 34

................................................................................... Table 3.2 . Average temperature recorded fiom 2000 to 2007 35

...................................................................................................................... Table 3.3 . Average relative humidity 35 Table 3.4 . Annual average rainfall .......................................................................................................................... 36

................................................................. Table 3.5 . Monthly average wind velocity (Tan Son Nhat Station, 2007) 36 Table 3.6 . Width and Depth of the Tan Hoa - Lo Gom canal ................................................................................... 37

............................................................................................................. Table 3.7 . THLG flow in Dry Season 2002 38

Table 3.8 . THLG flow in Intermediate Season 2002 .............................................................................................. 39 .......................................................................................................... Table 3.9 . THLG flow in Rainy Season 2002 39

................................................................................................ Table 3.10. Numbers of household' interview sheets 45 ................................................................................................................. Table 3.1 1 - Housdand status at districts 47

........................................................................................................ Table 3.12 - Location of houses in project area: 47

Table 3.13 . Sensitive receivers along project route .............................................................................................. 48 ................................................................................................ Table 3.14 . Su&e Water Quality sampling station 49

Table 3.15 . Surfilce water quality at Da Phuoc sludge disposal site .......................................................................... 52 Table 3.16 . Ground water quality data in project area .............................................................................................. 53 Table 3.18 . Physical . Mechanical Composition of Garbage in Sediment ................................................................. 54 Table 4.1 . ?he potential environmental impacts of the project ................................................................................ 59 Table 4.2 . Statistic of impacted land and house in project area ................................................................................. 61 Table 4.3 . Cultural sites in project area and nearby area .......................................................................................... 62 Table 4.4 . Impacts on cultural sites ......................................................................................................................... 63 Table 4.5 . Volume of construction materials, construction and demolishment waste ................................................ 64 Table 4.6 . Loading of particulate matter emission fiom truck unloading of construction material and loading construction waste ................................................................................................................................................... 65 Table 4.7 . Transport of construction materials. construction and demolishment waste .............................................. 65 Table 4.8 . Emission factors from vehicles ............................................................................................................... 66 Table 4.9 . Emission loading fiom vehicles .............................................................................................................. 66 Table 4.10b . Total emission loading from transport of dredged sludge and material to Da Phuoc solid waste treatment site for each scenario (dday) .................................................................................................................................... 67

....................................................................................... Table 4.1 1 . Assessment of noise impact on sensitive sites 68 Table 4.12 . Volumes of excavated material ............................................................................................................. 74

....................................................................... Table 4.13 . Characteristics of contaminated sludge analysed in 2009 74 ........................... Table 4.14 . Assessment of traf£ic congestion possible caused by the project in construction phase 75

............................................................................ Table 4.15 . Total Wastewater flow (m31day) and Loads (kg/day) 77 ........................................................................................................ . Table 4.16 Estimated pollutants concentration 77

v Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 5 Phung Khac Khoan. Dakao Ward. District 1. HCMC .

Environmental Impact Asessment Report: VietNam Urban Upgrading Project . Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal. Embankment and Roads Along Tan Hoa . Lo Gom Canal

.................................................................................................. Table 4.17 . Wastewater flows in case having CSO 78 ........................................................................................ Table 4.18 . Total Wastewater Loads in case having CSO 78

There is currently no immediately plan for the construction of a WWTP for the Tan Hoa - Lo Gom project, due to a lack of funding. although the master plan does call for its construction at some point in the future . The above indicates

................................ the impact on the receiving body considering with and without the Tan Hoa - Lo Gom WWTP 79 .................................................. Table 4.19 - Discharged wastewater flow and its concentration fiom TH-LG basin 79

.............................. Table 4.20 . The result of predicting the increase of BOD and SS in water body of Tau Hu canal 79 .......................................... Table 4.21 . Computation of loads and concentrations of pollutants in SP.01 wastewater 82

Table 4.22 . The summary of design elements of FS design and selected design option ........................................ 83 Table 4.23 . The impact assessment on alternative of the project .............................................................................. 84 Table 5.1 . Comprehensive table of resettlement demands ........................................................................................ 89 Table 5.2 . Example of Possible Construction Equipment Noise Emission Criteria Limits ......................................... 93 Table 6.1 . Public consultation schedule conducted by CEECO ............................................................................... 113 Table 7.1 . Institutional Responsibilities .................................................................................................................. 118 Table 7.2 . Environmental Training Programe ......................................................................................................... 119 Table 7.3 . Summarized plan for mitigation measures during three principal stages .................................................. 121 Table 7.4 . Number of the sensitive receptors found in the project area ................................................................... 127 Table 7.6 . Estimate cost for environmental management program .......................................................................... 129 Table 7.7 . Estimate cost for environmental training ................................................................................................ 130 Table 7.8 -Estimated Budget Costs for EMP Implementation ................................................................................. 130 Table 6.2 . Public consultation schedule conducted by CEECO ............................................................................... 193 Table 6.3 -Results of communities' opinions in project area ................................................................................... 193

vi Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 5 Phung Khac Khoan. Dakao Ward. District 1. HCMC .

Euvironment.1 Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal. Embankment and Roads Along Tan Hoa - Lo Gom Canal

LIST OF FIGURES ............................................................................................................. . Figure 2.1 Location map of THLG Project 11

.................................................................................................. . Figure 2.2 Route of THLG Sectorial Project No.4 12 ..................................................................... . Figure 2.3 Designed Longitudinal Profile along the Canal Centerline 14

......................... Figure 2.4 - The straight Line Diagram of the proposed locations of bridges along the THLG Canal 17

......................... Figure 2.5 - Typical Section Showing Space Allocated for Utilities For 30m road above culvert box 19 ............................................ Figure 2.6 - Typical Section Showing Space Allocated for Utilities of Canal Side Road 20

.................................................................................................................. Figure 2.7A - C.S.0 - plans and sections 21

.................................................................................................................. Figure 2.7B - C.S.0 - plans and sections 22 .......................................................................... Figure 2.8 - Schematic Arrangement of CSO and interceptor sewer 23

....................................................................................................... Figure 2.9 - Working sequence of tone masonry 29 Figure 2.10 - Working sequence of retaining wal I ................................................................................................... 30 Figure 2.1 1 - Working sequence of retaining wall with improvement soil ................................................................. 31 Figure 2.12 - Working sequence of box culvert construction ..................................................................................... 32 Figure 3.1 - Flow rate of THLG canal at Dong Den Street, March 01'' to 0 3 ~ , 2001 .................................................. 40 Figure 3.2 - Flow rate of THLG canal at Dong Den Street, July 0 2 " ~ to 04&, 2001 ..................................................... 40 Figure 3.3 - Flow rate of THLG canal at Hoa Binh bridge, March 01% to 0 3 ~ , 2001 .................................................. 41 Figure 3.4 - Flow rate of THLG canal at Hoa Binh bridge, July 02"~ to 04&, 2001 ..................................................... 41

....................................................................... Figure 3.5 - The THLG basin and existing drainagetsewerage system 43 Figure 3.6 - Flood inundation areas in the Tan Hoa-Lo Gom canal basin ................................................................... 44 Figure 3.7 - Income of households in project area ................................................................................................. 46 Figure 3.8 - Expenditure of households - wards ..................................................................................................... 46 Figure 3.9 - Location map of surface waterlsediment and air quality sampling sites ................................................... 50 Figure 4.1 - Dredging activities in the lower section of Tan Hoa - Lo Gom may impact on water quality of Tau Hu canal ..................................................................................................................................................................... 70 Figure 4.3 - Graph of result of applying RIAM on each environmental components for the project ............................ 86 Figure 4.4 - Graph of result of applying RIAM on each environmental components for the project ............................ 87 Figure 5.1 - Application of silt curtains and screens in dredging area of interaction between Tan Hoa - Lo Gom and Tau Hu canal .......................................................................................................................................................... 99 Figure 5.2 . Excavated material transportation route by waterway ........................................................................... 102 Figure 5.3 - Excavated material transportation route by land .................................................................................... 103 Figure 5.4 - Proposed mitigation measure for dredged material disposal .................................................................. 106 Figure 5.5 - Cross sections of sludge landfill applied for Project sludge disposal ...................................................... 107 Figure 5.6 - Facilities and equipments commonly used to collect solid waste floating in canal in Vietnam ................ 108 Figure 7.1 - Environmental Implementation Organization ........................................................................................ 117 Figure 7.2 -Flowchart of EMP implementation reporting ....................................................................................... 117 Figure 7.3 - Location of noise, air quality, water quality and sediment sampling sites in preconstruction and construction phase ............................................................................................................................................. 131 Figure 7.4 . Location of noise, air quality, water quality and sediment sampling site in operation phase ................... 132

vii Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 5 Phung Khac Khoan. Dakao Ward. District 1. HCMC .

Emironmental Impact Aspessment Report: VietNam Urban Upgradii Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

GLOSSARY

CMS CUP DoNRE DOSTE EMD EMP MONRE MOSTE MOC MOF MPI MOST LEP LIA LUC NEA NUWCSS ODA O&M PIP Phuong PMU RAP SEMP TA TCVN TCXD TH-LG TUPWS VUUP WE3 CSO WWTP TPS

Consulting Management Services Community Upgrading Plan Department of Natural Resources and Environment Department of Science, Techno logy and Environment Environmental Management Division Environmental Management Plan Ministry of Natural Resources and Environment Ministry of Science, Technology and Environment Ministry of Construction Ministry of Finance Ministry of Planning and Investment Ministry of Science and Technology Law on Protection of the Environment Low-income Area Land Use Certificate National Environmental Agency National Urban Wastewater Collection and Sanitation Strategy Official Direct Assistance Operation and Maintenance Project Implementation Plan Ward Project Management Unit Resettlement Action Plan Safety and Environment Management Plan Technical Assistance Vietnamese Standard Standard for construction Tan Hoa - Lo Gom Canal Basin Transportation and Urban Public Works Service Vietnam Urban Upgrading Project The World Bank Combines Sewer Overflow Waste water Treatment Plant Terminal Pumping Station

. . . V l l l

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Ewironmentnl Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa- Lo Gom Canal

CHAPTER ONE INTRODUCTION

1.1. BACKGROUND O F PROJECT The project named Vietnam Urban Upgrading Project ( V W ) is the first major project in the national program supported by the World Bank. The VUUP aims to upgrade low-income communities in four cities, namely Ho Chi Minh, Hai Phong, Nam Dinh, and Can Tho. The VUUP will provide basic infiastructure and services improvements (referred to hereafter as tertiary infiastructure) to low-income communities already identified in the cities. The objectives of the Vietnam Urban Upgrading Project are as follows:

Alleviate poverty in urban areas by improving the living and environmental conditions of the urban poor Promote the participatory planning methods for urban upgrading to meet the people's demand Use multi-sector approach with communities' consultation in implementation process of upgrading programs.

The most important principle of the project is to activate community participation in all stages of preparation, design and implementation processes. The residents, who are living in the project area, will have the right to participate in and benefit fiom the project as well as contribute to the upgrading works. The VUUP - HCMC sub-project is a part of VUUP operates in Ho Chi Minh City. Ho Chi Minh City has a population of over 6 million of which approximately one-third are poor households living in infiastructuredeficient, low-income areas. The highest concentration of low-income communities is located in Districts that are within the Tan Hoa-Lo Gom (TEI-LG) that is the cause the sub-project is concentrated in the Tan Hoa - Lo Gom (TEI-LG) Canal Basin in the western part of the city. Objectives of the sub-project are:

To alleviate poverty in urban areas To improve the living and environment conditions of the low-income communities, and to help reorganize the city To build and develop housing find that the urban poor are willing and able to pay for To provide assistance for the city authorities with land and housing management to speed-up the process of granting Land Use Certificates (LUGS) for the poor

Principles of the sub-project are: Community participation Minimize relocation or resettlement Multi-sectoral participation Size of investment depends on the stake-holder participation Apply lessons learnt fiom similar projects Engineering standards are appropriate for the communities' demands and capacity Take city master plan and local area plan into account Make surveys for primary and secondary infiastructure and plans for linking with tertiary infiastructure Identify services that communities have to contribute

= Have works done with the approval of the consultants and according to the Vietnam's and WB's procedures

1 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HULTPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental I m ~ a c t Assessment Re~ort: VietNam Urban upgrading Project - ~ o ' C h i Minh Sub-Roject Sectorial Roiect No.4: Im~rovement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Infiastructure upgrading not only meets the pressing and short.term needs of communities but also facilitates conditions for the hture stable development

= Enhance the commonly consciousness during the project development, particularly towards the environmental protection

The Sectoral Projects of the UUP are: Sectoral project no. 1: Tertiary Infrastructure Upgrading for 33 low-income area inside Tan Hoa - Lo Gom basin. Sectoral project no.2: Tertiary Infiastructure Upgrading for low-income area outside THLG basin. Sectoral project no. 3: Primary and Secondary Infiastructure upgrading: water drainage inside THLG basin. Sectoral project no. 4: Canal Improvement canal embankment THLG Basin Sectoral project no. 5: Primary and Secondary Infiastructure upgrading: water supply outside THLG basin. Sectoral project no. 6: Primary and Secondary Infiastructure upgrading: water drainage outside THLG basin Sectoral project no. 7: Resettlement site construction and housing for the poor: VLB, Binh Chanh district.

= Sectoral project no. 8: Revolving loan hnd for housing improvement Sectoral project no. 9: Land and Housing Management Sectoral project component 6 (Sectoral project No.10): Capacity building for project management.

1.2. OBJECTIVES OF THE EIA STUDY This EIA report concentrates on the following objectives:

Description of the proposed Vietnam Urban Upgrading Project - Ho Chi Minh City Sub-project - Sectoral Project No.4: Improvement of Canal, Embankment and Roads along Canal - Last Design Report, 08.2008. Description of the existing environment at Tan Hoa - Lo Gom Canal and surrounding area, based on the investigation data carried out by FS Consultant Group, 2003. Assessment and prediction of the main potential impacts of the project on the surrounding environment and social effect. Proposal of a feasible measures to mitigate the negative impacts Proposal of Environmental Management Plan (EMP) and environmental monitoring programs.

13. ENVIRONMENTAL LEGISLATION AND GUIDELINES

13.1. World Bank Policy on Environmental Assessment

The environmental impact assessment study for the sanitation project is designed to evaluate its status with respect to all applicable World Bank environmental and social policies and guidelines. According to Operational Directive 4.01, the project is classified as a Category A project and therefore requires the completion of full-scale EIA. This directive describes guidance on Bank' Policy and procedure for conducting environmental assessments of proposed projects. Additional World Bank policies that were engaged through the Project's EIA process include: OP 4.1 1 Safeguarding Cultural Property in Bank-Financed Project; and OP 4.12 Involuntary Resettlement Detailed guidance on assessment methodologies and common impact associated with urban drainage and water development work were provided by World Bank's Environment assessment Sourcebook.

2 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Assessment Report: VietNam Urban Upgrad'mg Project - Ho Chi Minh Sub-Project Sectorial Proiect No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

13.2. Vietnamese Policy and Administrative Framework on Environmental Assessment

Vietnam's most relevant environmental policies for environmental assessment are: Administrative framework In Vietnam, the Ministry of Science, Technology and Environment (MOSTE), formed in October 1992, was the top decision-making body with overall responsibility for the environmental sector until 2002 when the Ministry of Natural Resources and Environment (MONRE) was established. Decree No 91/2002/ND.CP on the functions, tasks, powers and organisational structure of the MONRE was promulgated on November 1 1,2002. Within the Ministry, the National Environmental Agency (NEA) develops legislation and regulations, programs, controls and monitoring systems for environmental protection throughout the country, and serves in a coordinating capacity with the environmental management function of other Ministries. In addition, local environmental authorities can have an important role in environmental management and enforcement of regulations, depending on the will of the local People's Committee. For the Project, the framework's relevant institutes are as follows:

+ Ministry of Natural Resources and Environment (MONRE). This new ministry will include four vice-ministers, 16 departments, one newspaper, and one magazine. The MONRE will merge numerous departments from several national agencies. These are outlined in Decree 91/2002/ND.CP: Providing for the functions, duties, powers and organisational structure of the Ministry of Natural Resources and the Environment.

+ Environmental Impact Assessment and appraisal Department. This Department is under MONRE. According to Decree 91/2002/ND.CP, the Department's function includes: To appraise environmental impact assessment reports of projects and of business and production establishments. The Environmental Impact Assessment and Appraisal Department is guided by Vietnam's established regulatory fiamework: i.e. LEP, Circular 490, CP 175, Decree 143/2004/ND.CP, etc.

+ The city's Department of Environment and Natural Resources (DoNRE) was formed in late 2003. DoNRE houses an Environmental Management Division (EMD). The EMD is responsible for ensuring environmental protection and management of provincial matter's in accordance with LEP, Decree 175, 143/2004/ND.CP dated July 12, 2004 amended and added to Article 14 and Circular 490. Hence, it is DONRE - and in particular, the EMD - that plays the key regulatory role during project construction and operation.

Applicable Standards The following environmental standards, as set by MOSTE in 1995.2002 and by MONRE in 2005 of specific important to the TH-LG project illustrated in Table 1.1.

Table 1.1 - Vietnamese environmental standards


Number of standard

TCVN 5524.1995

TCVN 5525.1995

TCVN 5942.1995

TCVN 5944.1995

TCVN 5945.2005

Name of standard

General requirements for protecting surface water against pollution

General requirements for protection of underground water

Surface water quality standard

Groundwater quality standard

Industrial wastewater discharge standards

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Roject Sectorial Roiect No.4: Improvement of Canal, Embadanent and Roads Along Tan Hoa - Lo Gom Canal

In cases where Vietnamese standards are not applicable, the project must obtain MONRE's approval for the use of equivalent standards of the countries that have provided the technology and equipment to Vietnam, or to apply an equivalent standard fiom a third country. At now, there are currently no standards or decision for excavated material disposal promulgated by the government. Therefore, the environmental consultant uses:

Number of standard Name of standard

+ MacDonald, D.D., C.G. Ingersoll, and T.A. Berger. 2000a. Development and of Consensus-based Sediment Quality Guidelines for Freshwater Ecosystems. Arch. Environ - Contam - Toxical. 39:20.3 1.5 and

TCVN 5948.2005

TCVN 5949.1998

20 TCN.5 1.84 (Ministry of Construction)

QCVN 08:2008

+ Maximum contaminant concentrations and leachable concentrations allowed in soil to be disposed of as Category C of EPA - Victoria - Australia . Publication 448 . Classification of Wastes - 7.2007.

Legal backgmund + Law on Environment Protection No. 52/2005/QH11 dated November 29th, 2005 of

Vietnamese Parliament.

+ Law on Fire and Explosion Prevention No. 27/2001/QHlO dated June 29th 2001 of Vietnamese Parliament.

+ Decree No. 80l20061ND.CP dated August 09th, 2006 of Vietnam Government "The guidelines on implementation of Law on Environmental Protection".

Road motor vehicle noise. Maximum permitted noise level

Noise in public and residential areas. Maximum permitted noise level

Hygienic distance fkom the wastewater treatment facilities to the boundaries with houses, buildings and food processing units Sanitation regulations on discharging wastewaters into rivers and lakes

+ Decree No. 81l2006IND.CP dated August 09th 2006 of Vietnamese Government for the Guidelines on Pecuniary Penalty for Violation of Law on Environmental Protection.

+ Decree No. 68/2005/ND.CP dated May 20th 2005 of Vietnamese Government for Chemical Safety.

+ Decree No. 59l2007IND.CP dated April 09th 2007 of Vietnamese Government about management of solid waste.

+ Decree No. 88/2007IND.CP dated May 28th, 2007 of Vietnamese Government about municipal and industrial drainage.

+ Vietnam Environmental Standards (TCVN 1995, 1998, 1999, 2001) of Ministry of Science, Technology and Environment.

+ Vietnam Environmental Standards (TCVN 2005) of Ministry of Natural Resources and Environment.

+ Decision No. 3733/2002/QD.BYT dated October loth, 2002 of the Health Public Ministry on workplace sanitation and safety regulations and standards.

4 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HINIPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Assessment Report. VietNam Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa- Lo Gom Canal

+ Decision No. 3512002lQD.BKHCNMT dated December 26th, 2002 of Minister of Ministry of Science, Technology and Environment on promulgating the list of compulsory Vietnam Environmental Standards.

+ Decision No. 2212006lQD.BTNMT dated December 18th, 2006 of Minister of Ministry of Natural Resources and Environment on compelling the application of Vietnam Environmental Standards.

+ Decision No. 2312006lQD.BTNMT dated December 26th, 2006 of Ministry of Natural Resources and Environment for the Promulgation of the List of Hazardous Wastes.

+ Circular No. 12/2006/TT.BTNMT dated December 12th 2006 of Ministry of Natural Resources and Environment for the Guidelines on Operation Conditions and Code, Inventory, Registration, Approval for Hazardous Wastes.

+ Decision No. 13612004lQD.BCN dated November 19th, 2004 of Ministry of Industry for the Promulgation of the List of Requirements and Management for Machineries, Equipment and Chemistry of Industrial Types.

+ Decree No. 68/2005/ND.CP dated May 20th 2005 of Vietnamese Government for Chemical Safety.

+ Agreement on Land Retaining No. 54/lTGD/IZICO dated June 14th 2007.

+ Investment License No. 492043000067 dated November lst, 2007. First changed on 22. January 2008.

+ Circular No. 05/2008/TT.BTNMT dated December 08th 2008 of Ministry of Natural Resources and Environment for the Guidelines on Strategic Environmental Evaluation, Environmental Impact Assessment and Environmental Protection Commitments.

13.3. VUUPHC status and Other Projects in project area

13.3.1. VUUPHC status and phasing

Table 1.2 - VUUPHC status and phasing is presented


No -

1

2

3

4

5

6

Feasibility Study on Sanitation and Urban Upgrading of Tan Hoa - Lo Gom Canal Basin SP.0 1, Stage 1 - improvement of

infiastructure 4 in THLG basin

SP.01, Stage 2 - improvement of infiastructure 4 outside THLG basin

SP.02, Stage 1 - improvement of infiastructure 2&3 in THLG basin SP.02, Stage 2 - improvement of infiastructure 2&3 outside THLG basin SP.04 - Improvement of THLG Canal

Prepared by Binnie Black & Veatch

Int'l, 2003

Approved, dated 112004



Under preparing

Finish

Going to invest

Under Construction

Going to invest

Waiting for Loan

Environmental Impact Asessment Report. VietNam Urban ~ ~ ~ a c l i i Project - ~ o ~ h i Minh Sub-Project Sectorial Proiect No.4: Imvrovement of Canal. Embanlanent and Roads Along Tan Hoa - Lo Gom Canal

1.3.3.2. Other relevant Projects in THLG project area

Table 1.3 - Other relevant Projects in THLG project area is presented

1 Relevant Proiects I Status 1 1. Nhay - Ruot Ngua Canal Dredging Project; 2. Environment and Water Improvement Project in Tau Hu - Ben

1 4. Environment Improvement Project . Hang Bang Canal 1 Pausing I

Pausing Under Construction

Nghe, Doi - Te Basin; 3. East-West High Way Project

1 Drainage System Improvement Sub-project;

Under Construction

1.4. APPLIED EIA METHODOLOGY The methods used for EIA Report are listed as follows:

Book preview: + It is the essential method in EIA in particular and scientific research in general.

+ Inherit and use the results of many research reports before, develop what have not done yet, and prevent the mistakes.

+ Previewing and applying specialized materials and books in the area related to the project play an important part to identify and analyze the impacts.

Methods of in-field survey: + Visit project site to survey its status and related surrounding objective; + To collect environmental samples; Environmental sampling and analyze methods: All samples collected in.field will be analyzed in lab. Statistical method for data processing: Using statistical software, e.g., Excell, SPSS, to make data process. Identification method: + Describe the environmental body;

+ Identify the items/sources/activities of the project able to cause potentially impacts on environment.

+ ldentify waste line and related environmental problems. System analysis method: + It is the popular method in environmental area;

+ Its advantage is that it can be used to assess the impacts totally and that it is very usehl to identify the impact sources.

+ This method considers pollution sources, impact sources, impacted objectives.. . as components in a system, which have closed relation ship, and then, identify, analyses and assess the impact.

Comparison method: compare with required Vietnamese standards to assess the environmental quality and the impacts. Rapid assessment method: + Use the data, information, emission factors and methods of WHO;

6 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (IIULrPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Assessment Report VietNam Urban Upgrading Projed - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa- Lo Gom Canal

+ Very useful to calculate pollutants load and assess the impacts, especially in case of lack of practical information.

Expert methods: This method is based on the knowledge and practical experience of environmental experts. GIS method: Use some software such as GPS, Mapinfo, Arcview.. . Environmental modeling method: + Use Environmental modeling software to assess the impacts and the dispersion of

the pollutants.

+ Very effective and popular in the world and in Vietnam in practice.

1.5. IMPLEMENTATION ORGANIZATION The EIA report on the Project Sectorial 04 in the Ho Chi Minh City Urban Upgrading Projed (HUUP) is prepared by the CEECO. Introduction of CEECO:

Full name: Center for Environment and Ecological Application- CEECO Office: Building 26 Dinh Bo Linh, Ward 24, Binh Thanh district, Ho Chi Minh City. Tel.: 08 - 35 117321 Fax: 08 - 351 17320 Director: Hoang Van Tung, BSc.

Table 1.4 -The list of members partaking in the EIA is given below.

In addition to those members, this EIA is constituted with the participation of many other experts with thorough knowledge in various fields such as control of air pollution, water pollution, emuent and solid waste, nose, vibration, hazardous wastes and environmental economics.


Speciality

Environmental technology

Environmental science

Ecological environment , Ecological environment

Academic standard

MSc

BSc

BSc

Ass. Prof. Ph.D.

No.

1

2

3

4

Full name

Nguyen Quoc Luan

Tran Cong Tan

Hoang Van Tung

DoanCanh

6 Doan Thi Thuy MSc Environmental technology I

8

9

10

1 1

Nguyen Nhat Vu

Vo Phuong Hoai

Nguyen Chi Thoi

Nguyen Huynh Anh Tuyet

13

14

15

Engineer

BSc

BSc

Engineer

Environmental engineering

Ecological environment

Ecological environment 1 Environmental management 1

Hoang Van Tin

Ngo Dinh Tuan

Nguyen Van Phung

Engineer

Engineer

B Sc

Information technology

Environment

Ecological environment

Environmental Impact hessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

CHAPTER TWO PROJECT DESCRIPTION

2.1. INTRODUCTION TO THE PROJECT a) Title: Sectorial Project No.04: IMPROVEMENT OF CANAL, EMBANKlMENT AND ROADS ALONG TAN HOA - LO GOM CANAL, Ho Chi Minh City Sub-project - Vietnam Urban Upgrading Project. b) Investment site: The Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal encompasses three districts and numerous wards as follows:

1) Tan Phu District with 11 Wards 2) District 6 with 11 Wards 3) District 11 with 10 Wards

The location of project area is showed in Figure 2.1 c) Investor : The PMU for the HUUP

Representative: Mr. Nguyen Hoang Nhan - Title: General Director Address: 5 Phung Khac Khoan, Dakao ward, District 1, Ho Chi Minh City Tel.: 08.8247663 . Fax: 08.8246499

2.2. GENERAL DESCRIPTION OF SECTORIAL PROJECT NO. 4

LIAs mainly focus in districts of Tan Hoa - Lo Gom basin. This is the basin with poor sanitation and drainage system and easily flooded with water. Some households have legal DPers and almost households do not have. Their houses were built along cannal embankment, when implementing the project, many households must relocate for improving cannals and roads along cannal embankment. Tan Hoa - Lo Gom cannal alignment is located in the south.west of the city, expanding from the north to the south through 4 districts: Tan Binh District (Bau Cat area), Tan Phu District, District No. 1 1 and District No. 6. Final part of this cannal alignment is connected with Tau Hu cannal. Total population of this basin is about 750,000 people. The length of Tan Hoa - Lo Gom basin is 7.4 km. Innitially, this is a small drainage pipeline with the length of about 3.5 km, discharging into Lo Gom cannal of 4km. Bordering to Tau Hu cannal, this cannal alignment is about 60m wide and 3m deep. This basin comprises commercial and industrial bases and series of buildings, including sky.scRPers and 1ow.roofed houses.

Main investment works of SP.04 includes:

1. Construction, improvement and upgrading of embankments and dredging canals: Improving and upgrading canal (Sta. Om - 4365m): including dredging, adjusting alignment, construction of embankments, roads and bridges: + THLG canal, opened canal, type I : quantity of 7480m + THLG canal, opened canal, type 2: quantity of 1250m + Bau Trau canal, opened canal, type 1: quantity of 488m + Ba Lai canal - Box culvert 2x4m: 178m + Ba Lai canal - Box culvert 2x6m: 125m + Construction of sewer interceptor and CSO

= Improving and upgrading canal (Sta. 4365m - 7450m): including dredging and installing box culverts: + Box culvert 2.5m x 4m: quantity of 355m

8 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (EIUUPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

+ Box culvert 2.5m x 6m: quantity of 745m + Box culvert 2.5m x 8m: quantity of 1040m + Box culvert 3m x 1 Om: quantity of 945m +

Improving and constructing canal and canal embankment: Upgrading canal (Sta. Om - 4365m): including approach road along canal entertainment areas and parks, including: + Entertainment area: quantity of 25.828m + Approach road along canal embankment (13m wide) along canal alignment,

quantity of 49.0531112 + Approach road along canal embankment (20m wide at maximum) along canal

alignment, quantity of 18.5 1 Om2 + Park: quantity of 19.568m2 Canal and canal embankment (Sta. 4365m - 7450m): including approach road along canal, entertainment areas and parks, including: + Entertainment area: need further updated + Approach road along canal embankment (13m wide) along canal alignment,

quantity of 14.401 m2 + Approach road along canal embankment (20m wide at maximum) along canal

alignment, quantity of 50.992m2 + Park: quantity of 2.370m2

3. Bridges

List of NewIExisting Bridges for RemovaUReplacement

I No. ( Name / Chainage I Remarks 1 Footbridges 1 ...


Traffic Bridges

Pedestrian Bridge with Motorbike Traffic Pedestrian Bridge with Motorbike Traffic Pedestrian Bridge with Motorbike Traffic Pedestrian Bridge with Motorbike Traffic

1+358 1 +762 2+115 2+399

1 2 3 4

Existing Bridge to be Retained 1

Footbridge No. 1 Footbridge No.2 Footbridge No.3 Footbridge No.4

FootbridgeILight Traffic Bridge

Pham Van chi5 2 3

I 4 5 6 7 8 9

5 6

4+ 177 4+306

Light Traffic Bridge 1 Light Traffic Bridge 2

4. Sewage interceptor with combined storm water overflow (CSOs) with required pumping lifting stations will be included in contract packages 1 ,2 ,3 and 4.

5. Dredging is to be included in the individual contract packages. The volume of dredged materials is approximately 85,000 m3 of contaminated sludge and 333,000 m3 of excavated materials (soil fiom the canal banks and uncontaminated sediment fiom the lower level).

Hau ~ i a n ~ ' 1+920 For hrther structural investigation Ong ~uong.1'

Allow light truck traffic Allow light truck traffic (Existing is RCP)

Ong ~uong.2' Dang Nguyen can2 Bau ~ r a u ~ Tan ~ o a ~ Dam sen3 Cho Lon ~ r i d ~ e ~

2+700 3+100 3+508 3+376 3+747 1+730

By Others (UPMU 1) For Detailed Design as identified in FS By Others For Detailed Design as identified in FS By Others New Bridge By Others ( PMU District 6)

Environmental Impact Assessment Repo* VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Proiect No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa- Lo Gom Canal

Source: CEECO, 212009

Estimate contaminated sludge volume in the bed of TH-LG canal

Estimate total volume of dredged sludge and excavated materials Dredged materials

Sections of the canal

Package 1 KMO.00 - KM1+401.45

Package Length Soil and Notes

Depth of sludge layer

(m) (SD)

0.6

Average Width of canal

section (m) 0 48

11.5

2 1 1401.45 ( 2290.46 1 889.01 / 80,839 ( 10,224 1 70,615 1 Open canal 1

Area of dredged cross-section (m2)

(9

32.4

Depth (m)

@)

3

Package 3 KM2+290.46 - KM3+329.40

Package 4 KM3+329.40 - KM4+353.79

1

3 / 2290.46 1 3329.40 1038.94 1 85,392 1 11,948 1 73,444 1 Open canal

0.00 1 1401.45 1 1401.45 1 94,630 1 45,407 1 49,223 1 Open canal I

Section length

(m) , (Li9

1401

Package 5 KM4+353.79 - KM5+286.79

Package 6 KM5+286.79 - KM6+854.36

Total: 84.943 S = (W + 2D)*SD (m2)

V = S*L (m3

18

12

6 1 5286.79 1 6854.36 1 1567.57 1 60,196 1 5,173 1 55,023 1 Box Culvert 1

Sludge vdume (m3)

03 45.407

4 5

1 Total: 1 685436 ( 415,134 1 84943 / 330,562 1 Source: 1. CEECO, 212009

2.5

2.5

2. DHV, 2007 (calculated by software)

3329.40 4353.79

The layout of project is showed in Figure 2.2.

0.5

0.4

10 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMIT) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

4353.79 5286.79

11.5

6.8

1024.39 933

1039

1024

11.948

6.966 1

53,514 40,563

6,966 5,225

46,548 35,338

Open canal Box Culvert

Emironmental Impact Assers~meot Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

L m m N PLAN

11 Project Management Unit for Ho Chi Minh City Urban Upgrading Project ( H U U P T 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Asscssmcmt Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement o f C a d , Em-& and Roads Along Tan Hoa - Lo Gom C a d

Figure 2.2 - Lay out of THLG Sectorial Project No.4


Environmental Impact Assessment Report: VietNarn Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

23. FINAL DESIGN OF SECTORIAL PROJECT NO. 4

23.1. Canal Bank Protection

23.1.1. Canal Sections

On soft soil section, located at the first 1.40km section of the canal, ground settlement will be allowed on a regulated basis by providing the optimum height of embankment with sloped masonry walls on wooden piles. The proposed ground improvement for the roads on both sides of the canal coupled with the sloped embankment of the channel will tend to stabilize both the road and the canal embankment. For the Canal Bank and Embankment Protection the following is presented in Table 2.1.

Table 2.1 - Canal Bank Protection

Section Chainage Bank Protection Remarks

A

3+300 1 3+850 RC Cantilever Type 1 I Retaining Wall (Type 2,3) I With CDM2'

B 2+300 1 3+300

0+170 1 1+400

RC Cantilever Type Retaining Wall (Type 3, 4% and 4b)

I 3+850 1) Masonry Wall with Cement Deep Mixing (CDM) under roads (both sides of canal) 2) Retaining Wall on Improved Soil (CDM) 3) Retaining Wall on Shallow Foundation

Sloped Masonry Wall on Wooden Piles

RC Cantilever Type Retaining Wall (Type 5b)

RC Cantilever Type Retaining Wall (Type 5,

1 +400

1 +680

With CDM~)

C

For the Road embankment, the recommendation is to apply net fill heights with 0.7m to 1.2m and over heights of 0.20m. After approximately 10 years the design level of the road (finished grade) will be reached. After approximately 15 to 20 years maintenance of the roads will be necessary. This means an extra fill of 0,lOm to 0,15m. If maintenance is not desirable after 15 to 20 years, the extra fill has to be adjusted to a higher level. It has to be mentioned that it is not necessary to compensate the end-settlements during construction time. The cross-sections of typical of Bank Protection are presented in Annex 2.1.

Side Roads on CDM''

With CDM"

On shallow Foundation without

1 5% and 5b)

1+680

2+300

4+366

23.1.2. Designed Channel Gradient

CDM~)

The Figure 2.3 shown below is the designed Longitudinal Profile along the Canal Centerline. It starts fiom the downstream towards upstream section of the channel.

RC Cantilever Type Retaining Wall (Type 1)

4+366 6+940


On shallow Foundation without CDM~'

RCBC

RCBC 6+940

Good Soil

Good Soil 7+45 0

Emironmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectoral Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

23.2. Roads and Bridges

23.2.1. Roads

Soft soil section along the project site stretch 4.40 kilometers long fiom the beginning of the project. It doesn't differ fiom the sub-soil condition of the channel and embankment where the necessary ground improvement and modification has to be considered to avoid further settlement and to attain a reliablelstable road sub-grade.

The top of the (vertical) embankment for THLG has been designed and decided on +2.10m. This level has been chosen because of the certain height of the embankment due to prevention of flooding of urban areas. The level of the road embankment in the design (Road finish grade) varies along the canal and should be referred in construction drawings of the roads.

Section Km 0+000 - Km 1+400: In order to guarantee the stability of the canal (km0+000 to km 1+400, downstream), soil improvement up to a level of at least .l1.50 m is needed while the amount of soil added to the existing ground level to reach the road design level must be limited to 1.5 and preferably to 1 m. With the present design, additional levels reach 1.80 m (at chainage 0+280 km). It is strongly suggested to limit the over height as much as possible, to limit settlements, and generally additions should not exceed 1.2 m. In this section cement piles are used. Due to this construction near the canal mouth (km OM00 to km 1+400) settlements are much reduced and no hrther action is required. Section Km 1+400 - Km 4+366: At the two other locations with deep mud layers (up to 10 m deep), cement piles may not be required, as the settlement after the project can be limited by cleverly playing with the settlements during construction. Section Km 4+366 to the end: Roads above culvert box

Roads over proposed RCBC and on stiff soil section: Standard road section comprising of designed Subbase Course, Base Course, and Surface Course (preferably multi-layer of Bituminous Concrete) shall be adopted.

Roads on soft soil section: Roads shall be constructed on improved ground or modified sub.- soil by Deep Soil Mixing (DSM) or other acceptable soil improvement method to prevent substantial settlement.

Road Drainage: By Curb and Gutter, Combination Curb Inlet and Manhole, underground Pipe System

Recommended Typical Road Sections and its corresponding pavement structure is shown in the drawings presented in Annex 2.2.

2.2.2.2. Bridges

There are 12 Bridges identified to cross the THLG Canal and 2 Bridges along side-- road crossing over canals connecting and draining towards THLG Channel. The Table below shows the summary of the Bridges Crossing THLG Canal. It also shows the bridges that run parallel to the canal and crossing channels that connect and drain towards THLG Canal. Cholon Bridge is identified as future bridge that will cross over THLG Canal at km. 1+370.


Envirn~lental Impact Assessment Report: VietNarn Urban Upgrading Project - Ho Chi Minh Sub-project Sectoral Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa -Lo Gom Canal

Table 2.2 - List of NewIExisting Bridges for RemovaVReplacement

No. 1 Name Footbridges

The straight Line Diagram of the proposed locations of bridges along the THLG Canal is shown in Figure 2.4. Perspective Views of the Proposed Traffic, Light Vehicle Bridges, and Footbridges Bridges are also shown. Pictures of existing bridges are also indicated representing its existing condition Existing Hau Giang Bridge is under going hrther structural investigation to determine its substructure configuration and composition. Decision on whether this bridge will be retained or replaced will be largely dependent on the result of the structural evaluation and stability. Likely, this decision will happened in the final phase of work for this project. Inclusion of Bau Trau Bridge in THLG Canal Package has to be decided upon by the HUUPMU and the concerned agency for Bau Trau Canal Improvement Project.


Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectoral Project No.4: Improvenlent of Canal, Embankment and Roads Along Tan Hoa -Lo Gom Canal

Figure 2.4 - The straight Line Diagram of the proposed locations of bridges along the THLG Canal


Euvironmental Impact Assessment Report: VietNarn Urban Upgrading Project - Ho Chi Minh Sub-Project Sectoral Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

23.3. Miscellaneous and ancillary works

23.3.1. Street and Roadway Lighting in Urban Areas

Good visibility under day or night conditions is one of the hndamental requirements enabling motorists to move on roadways in a safe and coordinated manner. Breakaway poles shall not be used on streets in densely developed areas, particularly with sidewalk. When struck these poles could interfere with pedestrians and cause damage to adjacent buildings. Because of lower speed and parked vehicles, there is much less chances of injuries to vehicle occupants fiom striking fixed poles on a street as compared to a highway. Warrants for the justification of street lighting involve more than just identifying a roadway classification. Pedestrian and vehicular volume, night.to.day accident ratio, roadway geometry, merging lanes, curves, and intersections all require carehl consideration in establishing illumination levels. When illumination levels provided for various roadway, walkway, and area classification are not influenced by these considerations, the suggested minimum levels of illumination expressed in average maintained horizontal lux) are contained in Table following next. Illumination levels at intersections shall be the sum of illumination levels on intersecting streets at the intersection.

Table 2 3 - Minimum Illumination Levels

+ So for the Residential Roadways the average lux shall not be more than six times the lux value for the poorest lit areas.

Minimum Illumination Levels

Road Classification Industrial / Commercial (lux) Residential (lux)

+ Because glare is also an indication of the quality of lighting, the type of fixtures and the height at which the light source are mounted are also factors in design of street lighting systems. The objectives of the designer shall be to minimize visual discomfort and impairment of driver and pedestrian vision due to glare.

Alleys

Sidewalks

1 Residential Roadways 1 6 : l 1

The uniformity of the lighting is an indication of the quality of illumination and shall be considered along with illumination levels. Uniformity of illumination can be represented by a uniformity ratio of the average-to-minimum lux values on the roadway or walkway surface. Recommended uniform ratios are as follows:

6.5

9.7

Table 2.4 - The uniformity of the lighting

I i 1 Commercial Roadways 3 : l

2.2

2.2

I RoadwayIWalkway Class

1 Residential Walkways

Uniformity Ratio

Commercial Walkways , 4 : 1

18 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (=MU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectoral Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa -Lo Gom Canal

2.2.3.2. Signage

Pavement markings and signage will be based on 22 TCN 22 1.93 : Road Traffic Safety and Signal Code.

2.2.33. Space Allocation for Utilities

Space on or under the Sidewalk was carefully planned to accommodate overhead as well as underground utilities (refer several followed figures). Some Typical Road Section shown in Figure 2.6 & Figure 2.6 that indicates among others the space allocated for each utility.

Figure 2.5 - Typical Section Showing Space Allocated for Utilities For 30m road above cukert box

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMZT) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectoral Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa -Lo Gom Canal

Figure 2.6 - m i c a 1 Section Showing Space Allocated for Utilities of Canal Side Road

2.2.4. Combined Sewer Overflow and Pumping station

2.2.4.1. Combined Sewer Overflow (CSO) Diversion Structures

The interceptor sewers are designed to carry the peak dry-weather flows (as estimated for year 2020) which will then be discharged to a wastewater treatment plant. The interceptor sewers will not have sufficient capacity to convey wet weather flows, and it is therefore necessary to divert the excess diluted wastewater (resulting fiom storm water runoff) into the canal.

Combined Sewer Overflow (CSO) diversion structures will be constructed either at or just upstream of the drainage pipe outlets, depending on site conditions, with connections to the interceptors (for wastewater) and to the canal for excess storm-water flows. As most of the pipe outlets are affected by tides flap gates will be required as part of these diversion structure to restrict the influence of tides. Typical configurations of CSO structures are shown in Figure 2.7A and 2.7B. One major practical issue anticipated with the use of flap gates is that it is possible that debrislsolid waste material could be trapped by the gates and hence affecting its function. To overcome this, screens have been incorporated into the design of the CSOs to trap any solid waste before they reach the flap gates.

The arrangement of CSOs, interceptors, pumping station and overflow are shown schematically in Figure 2.8.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HZTUPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Assessment Report: VietNam Urban Upgradii Project -Ho Chi Minh Sub-Roject Sectoral Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Figure 2.7A - C.S.0 - plans and sections

2 1 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Ewironment.1 Impact Assessment Report: VietNarn Urban Upgradii Project - Ho Chi Minh Sub-project Sectoral Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa -Lo Gom Canal

Figure 2.7B - C.S.0 - plans and sections

22 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (RULTPMCT) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectoral Project No.4: Improvement o f Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Figure 2.8 - Schematic Arrangement of CSO and interceptor sewer

f ! , : ' $ * , , 3 '

i l l : , $ : ; :

; t i > :

i $ , ? 2 j : l i d

SCHEMATIC ARRANGEMENT OF CSOs .. AND INTERCEPTOR SEWER '

$at% .-.- I I ~ Z I t ~ I WUt ! ........ ......... ... ..... . * -L.--..-.--~--.. "J


Ewiroamental lmpact Assessment Report: VietNarn Urban Upgradii Project -Ho Chi Minh Sub-Project - -

Sectoral Project ~b.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

2.2.4.2. Interceptor Sewers

The use of a box culvert for the upstream section of the canal (to minimize social dislocation); The location of the terminal pumping station (at the downstream end of the THLG Canal adjacent to Nguyen Van Luong Street in District 6); and For the route of the conveyance pipelines to the wastewater treatment plant (which will initially follow the corridor of the East-West Highway).

Some agreement has also been reached regarding the location of the wastewater treatment plant which should be at one of two alternative sites in Binh Chanh District.

These developments influence the choice for the interceptor sewer, and a single deep interceptor sewer constructed by pipe-jacking is now proposed for the following reasons:

The use of a box culvert for the upstream section of the THLG Canal means that the interceptor sewer will need to be of relatively large diameter throughout its length; The identification of a site for the terminal pumping station at the downstream end of the THLG Canal means that the interceptor system will drain in one direction only (ie in a downstream direction), and the sewer will therefore be relatively deep at the point of discharge into the screening chamber of the pumping station. The geotechnical evaluation has indicated that ground conditions in the lower part of the canal basin are likely to be poor, and construction of a large diameter sewer in a deep open excavation in these ground conditions will be extremely difficult with considerable risk of ground movement and expensive. Construction of the interceptor sewer by pipe-jacking will be less disruptive than construction in a deep open excavation, and will allow greater flexibility in the phasing with other project components such as the canal improvements and the canal embankments.

The layout and longitudinal profile of the proposed interceptor sewer and the location of the pump station are shown in Figure 2.30. A summary of the hydraulic design of the main interceptor sewer is given in Table 2.5. Other interceptor sewers will be required along the Bau Trau Canal and the Dam Sen Canal. These other interceptor sewers would be smaller in diameter and shallower, and would be constructed in open excavation.

Table 2.5 . S i n g of Proposed Interceptor Sewers

Interceptor Location

End of Upstream Box Culvert End of Box Culvert - Tah Hoa Bridge Tan Hoa Bridge - Ong Buong Bridge Ong Buong Bridge - Hau Giang Bridge Hau Giang Bridge - Ba Lai Canal Ba Lai Canal - Pump Station Others

Accumulated wastewater flow (m3/s)

1.90

Note: Mannings "n" roughness value used = 0.0 13 Slope of box culvert = 0.05%

24 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (EWUPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

2.0

3.5

3.9

4.2 5.1 0.5

Sewer Details Pipe Size

(mm) 4000x2500

2000

2000

2000

2000 2000

800.1000

Velocity ( d s )

1.4

1.5

1.5

1.5 1.5

Length (m) -

3085

835

714

827

1204 500

4800

Environmental Im~act Assessment Report: VietNam Urban upgrading Project - ~ o ' c h i Minh Sub-Project Sectoral Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Size of box culvert = Width * Height Interceptor slope = 0.08 - 0.15% Peak discharge (1 in 5 years) plus peak wastewater flows Peak wastewater flow.

2.4. RECOMMENDED TENDER AND CONTRACT PACKAGING Updated and Revised Project Cost Estimates as per Circular No.O5/2008/TT-BXD dated 22 February 2008 issued by the MOC and detailed engineering designs as of January 2009 puts the estimated base cost ofthe sub-project at approximately US$117 million. The canal improvement would include six works packages, and one construction supervision package as follows:

Package 1: Improving canal, dredging and construction embankments, interceptor and CSO, bridges, road along side canal fiom confluence THLG & Tau Hu Ben Nghe to bridge No 1 (near alley No.963 of Lo Gom street; 0.00 M to 1401.45M) Package 2: Improving canal, dredging and construction embankments, interceptor and CSO, bridges, road along side canal fiom bridge No 1 (near alley No.963 of Lo Gom street) to Hoang Le Kha Street (1401.45M to 2290.46M). Package 3: Improving canal, dredging and construction embankments, interceptor and CSO, bridges, road along side canal fiom Hoang Le Kha Street to Dang Nguyen Can Bridge (2290.46M to 3329.40M). Package 4: Improving canal, dredging and construction embankments, interceptor and CSO, bridges, road along side canal fiom Dang Nguyen Can Bridge to Dam Sen Park (3329.40M to 4354.79M). Package 5: Construction box culvert and road on box culvert, landscapes fiom Dam Sen park to Trinh Dinh Thao Street (4353.79M to 5286.79M). Package 6: Construction box culvert and road on box culvert, landscapes fiom Trinh Dinh Thao Street to AuCo outlet (5286.79 M to 6854.36 M). Construction Supervision of integrated system

Below is the Proposed Project's Contract Packaging together with the Estimated Construction Cost (After Tax) and Construction Schedule is presented in Table 2.6.


Environmental Impact Assessment Rcpo*. VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectoral Project No.4: Impovemed of Cad, Embankment a d Roads Alollg Tan Hoa - Lo Corn Canal

PROPOSED COY'RACT PACUAGlhG


~nvi;onmental'lmpact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectoral Project No.4: In~provement of Canal, Embankment and Roads Along Tan Hoa -Lo Gom Canal

Table 2.6 - Proposed construction schedule improvement of canel, embankment, and roads along TanHoa-LoGom Canal 2 7


Euviro~lental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial F'roiect No.4: Im~rovement of Canal and Roads Along Tan Hoa -Lo Gom Canal

2.5. DREDGING TECHNICAL AND CONSTRUCTION PROCESS

2.5.1. Dredging Technical

At the beginning of the Project (Section 1 & 2), the "Sealed Clamshell Dredging Method" is likely appropriate for the Project because of the limited access and the tidal effect on the channel that make it suitable for navigation and easy disposal system by barge or water transport should proven effective. On the upstream section (Section 5 & 6) where the canal section is approximately 5.10 meters wide and where multi-cell RC Box Culvert shall be located dredginglexcavation by backhoe is more suitable than any other method. He agility of this machine is more effective at very tight location. The picture of the Backhoe in operation is presented as below. On the upstream section (Section 3&4), a conventional "Sealed Clamshell Dredging Method" is also suitable. However, disposal of debris shall be by land transport.

Clamshell Method of Dredging

I I 1 I I

2.5.2. Embankment construction process

Sealed Clamshell Dredging Machine

Working sequence of tone masonry is presented in Figure 2.9. Working sequence of retaining wall is presented in Figure 2.10. Working sequence of retaining wall with improvement soil is presented in Figure 2.1 1. Working sequence of box culvert construction is presented in Figure 2.12.

Dredging by Backhoe Operation

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUU-PMU) 2 8 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Asessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

Figure 2.9 - Working sequence of tone masonry

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMCT) 29 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Emironmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

Figure 2.10 - Working sequence of retaining wall

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 3 0 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

TR~NH T I ITHI C ~ N G T ~ N G CHAN GIA ~6 A WORKING SEQUENCE OF RETAINING WALL WITH IMPROVEMENT SOIL

E U L 1 : O i p M Q y STEP 1 : Coller Dan working - H d n ctirh ccing I6c f~a c6 Gn dip dx kinh - finished hprwemenl soil m k i i q in r o d olOnq coral - W i g c u ran (hip W32 L 15m - l e m p o r q &+I pik drinrq - Lip y gdng ch6y IlJOO - bocinq insloll'mg

+ A + + +

-++++++ +++++++

B u k 2 . €hi0 &I " h q 16 STEP 2 : b i n ) lor loundolion

8& 4 : Thi cdng ludnp chdn STEP 4 : Workiog relob wdl - TMo dd 2 &m 1300 M n dudi lheo lrinh tg - Remove 2 lower loyers ol brocinq - Thi cdnq Idp bi lOnq Ibl dudi d6y ludnq c a n - Work~rq lean concrele - GIO cinq cdt tWp, 16p drmq von khudn rd 66 bi ling diy be Iuonq c16n - Insloll re~nlorrernenl steel bars, caslrq ond pure concrete 01 fooling roll - Go c6rq cdl U p . 6p dong ran khu6n rd. di, b6 I h q than lu6q chin - Insloll reinlorremenl sled bars, casing ond pure concrele ol stern ol wollinq

Ek!k 5 Long Ioc hwn Ihien - TUo dd vh khubn - O(lp &5 h L lrudc - thi cnnq 161 cdu m u lung tudnq c h b - (Nw dl 4 kinh) - Thoo dd he vnrq v6y c w v6n lhep

STtP 5 Pedeclng ww6nq - Removing cmng 01 woll - lnslalkng free stone in l rm l 01 roll - Inslolling Ihe moleiml hers in bock of w l l - (Dredgmng conol ) - Rernwirq Ihe tempwory sheet piling

Environmental Impact Aswsrnent Report: VietNam Urban UDETE~~~IUZ Proiea - Ho Chi Minh Sub-Proiect Sectorial Project ~0.4: ~ m ~ o v ~ m e n t of Canal and Roads i o n g Tan Hoa - Lo Gom Canal

Figure 2.11 - Working sequence of retaining wall with improvement soil

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 3 1

5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

Figure 2.12 - Working sequence of box culvert construction


MAT CAT NGANG THI C ~ N G C ~ N G HOP 2x(BxH) - BOX CULVERT CONSTRUCTION CROSS 2x(BxH) MAT CAT NGANG THI CGNG C ~ N G HOP 4x(BxH) - BOX CULVERT CONSTRUCTION CROSS 4x(BxH) li LC - SCU :I/%

M ~ T CAT NGANG THI C ~ N G C ~ N G HOP 2x(BxH) - BOX CULVERT CONSTRUCTION CROSS 2x(BxH) MAT CAT NGANG THI C ~ N G C ~ N G HOP 4x(BxH) - BOX CULVERT CONSTRUCTION CROSS 4x(BxH)

ri Lt - XU .I/% n' Is - X U [ :1/%

ADDRESS: 05 PHWG KHAC KHMN - DISTRICT 1 . HO CHI YlNH C m TEL (848) Q46498. FU: (848) Q464W

DHV WATER BV WTWUANDS)

C ~ N G THOAT N ~ C TAM 0 1 200 - TEMPORARY DRAIN 0 1 200 MAT CAT B-B - SECTION B-B BANG T H ~ N C ~i C~NC-TABLE LIST BOX CULVER DU AN THANH PHAN s6 4:

CAI TAO K ~ N H VA D U ~ N G DOC K ~ N H TAN HOA - ~b G ~ M THANH P H ~ H b CHI MlNH

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

CHAPTER THREE BASELINE DATA

3.1. PHYSICAL RESOURCES 3.1.1. Climate

The climate in the Ho Chi Minh City is influenced by the two major seasons, the wet season of southwest monsoon from May to October and the dry season of northeast monsoon fiom December to April.

3.1.1.1 Radiation In Ho Chi Minh City, the total hours of sunshine varied fiom 2,003 to 2,246 hours in the period 2000.2007. In the rainy season (May - October), the average hours of sunshine are 165 hourslmonth. In the dry season (November to April), hours of sunlight range fiom 164 hours (December) to the highest level of 259 hours in March. The monthly evaporation level is highest in months of the dry season (above 130mm) and lowest in months of the rainy season (under 50mm). The number of annual sunshine hours of 2000.2007 is shown in Table 3.1.

Table 3.1 - Number of annual sunshine hours of 2000.2007

bhang 3 - March 1 186.8 1 220.6 / 252.9 1 221.6 1 229.5

Number of annual sunshine hours pan Son Hoa station) (hours)

b a n g 6 - June ( 161.3 1 143.6 1 185.6 / 161.5 1 128

2007 1,891.10

113.3 193.6

190.6 Thang 5 - May 181.9

2004 2,080.80

181.8 190.7

2005 2,071.90

164.8 215.3

Ca n h - The whole year Thang 1 - January Thang 2 - February

216.9 PPPP

176.3

h a n g 7 - J U I ~ Thang 8 - August Thang 9 - s e p t 7

3.1.1.2 Atmospheric Temperature

2006 1,923.20

131 157.7

2000 2,002.90

192.8 193.1

Thing 10 - October Thang 1 1 - November

In the City, the average annual temperature is around 28"C, with the average monthly temperature highest in April at 30°C and lowest in December at 27OC. The range of the variation of the average, maximum and minimum temperatures are not large. The difference between hot and cool seasons is small and characterized by the mild climate in the project area. Average temperature recorded fiom 2000 to 2007 by the Tan Son Nhat Station is shown in Table 3.2.

225.6

168.1 139.1 180.4

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 34 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

105.6 166

213.4

164.5 161.3 162.3

Thang 12 - December 137.2

213.5

146.8 167.3

7 E q 200.4

153.1 178.1

pppp

142.2

~ ~ u b n s6 lieu: Dai Khi tupng Thuy vin Khu wc Nam BQ Source: Southern Regional Hydro-meteorological Center

148.7

208.7

13 8.8 124.6

pppp

140.2 157.2

90.5

147.7 135.8

121.2

127.2 142.1

141.4 147

127.5


phing 6 - June / 28.1 1 28.1 1 28.9 1 28.4 1 28.7

Table 3.2 - Average temperature recorded from 2000 to 2007

Average air temperature (Tan Son Hoa station) oC

khing 9 - September 1 28.2 1 27.9 1 27.9 1 27.6 1 27.7

Ca n h - The whole year

?hang 7 - July Than g 8 - Au g ust

27.4 27.2 26.2 27.2 27.3 hang 2 - Februar 27.7 26.7 27.7 28.2

Thang 3 - March 28.5 28.5 28.4 28.6 Thing 4 - April 29.1 30.1 29.8 29.5 Thing 5 - May 28.7 29.5 29.7 29.2

2000 27.9

3.1.13 Relative Atmospheric Humidity

2007 28.2

2004 28

27.7 27.9

khing 10 - October Thang 1 1 - November Thhng 12 - December

The City has an average annual atmospheric humidity of 73.77%. It is lowest in February and March, and highest in September and October (80.86%). Average relative humidity recorded fiom 2000 to 2007 by the Tan Son Nhat Station is shown in Table 3.3.

Table 3.3 - Average relative humidity

2005 28

27.8 28

~ ~ u 6 n s6 lieu: Dai Khi tuqng Thuy van Khu w c Nam BQ Source: Southern Regional Hydro-meteorological Center

26.7 27.4 27

~p -

bverage relative humidity (Tan Son Hoa station) (%) 1

2006 28.2

27.5 28.4

27.5 28

26

Ca n3.m - The whole year

27.9 27.6

27.6 27.5 26.2

'Thang 4 - April Thang 5 - May

rhang 8 - August 80 8 0 78 82 8 2 1

27.7 27.7

2000 77

Thang 6 - June Thang 7 - July

27.7 28.9 27.3

75 79


27.5 26.9 27.6

2004 75 ---

Thing 1 - January Thang 2 - February

80 80

Thang 9 - September Thdng 10 - October Thang 1 1 - November Thang 12 - December

68 70

71 7 1

7 1 75

2005 75

80 8 1

Ngu6n s6 lieu: DBi Khi tugng Thuy van Khu w c Nam BQ Source: Southern Regional Hydro-meteorological Center

78 86 77 76

69 69

70 74

2006 76

77 8 1

8 1 79 73 72

2007 76

73 6 8

73 75

69 68

69 80

8 1 8 1

80 82 79 77

80 83

8 1 8 1 75 73

83 82 76 72


3.1.1.4. Rainfall The annual average rainfall in the HCMC is around 1800mm. Approximately 90% of annual rainfall occurs during the Southwest monsoon with the highest rainfall occurring in October (2000.2007). In HCMC, the monthly average rainfall varies over a wide range. The average monthly rainfall in the period of June.October is always exceeds 200mm, while that in the dry season is always less than 20mm. Annual average rainfall recorded by the Tan Son Nhat Station is shown in Table 3.4.

Table 3.4 - Annual average rainfall

3.1.1.5 Wind regime In the dry season the North and Northeast winds are dominant. Wind speed in this season varies fiom 2.5 to 3.2 m/s (in Bienhoa and Tansonnhat). In the rainy season, the main wind directions are Southwest and West with the monthly average wind speed varying from 2.2 to 3.3 m/s. The Monthly average wind velocity at Tan Son Nhat of year 2003 is presented in Table 3.5.

Table 3.5 - Monthly average wind velocity (Tan Son Nhat Station, 2007)

Thang 5 - May 2.13 2 1 Thang 6 - June 2.07

Thhng 2 - February Thting 3 - March Thang 4 - April

Maximum wind velocity mls 07 12

r Months

/Thing 1 - January

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 36


Average wind velocity (mls) 2.13 2.65 2.90 2.77

khting 7 - July Thang 8 - August

13

1.97 1.83

2 1 24

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gorn Canal

3.1.2. Topography

The north of Ho Chi Minh City is at an elevation of 30.40 m above mean sea level (Cu Chi, Hoc Mon districts) while the average elevation of the central city is about 3.10m. However, most of HCMC lies at an elevation of less than 2 m above mean sea level. Natural drainage is thus dificult and problems with drainage occur in half of the southern area and most parts of the central city area. During high tides, the drains are backed up so when there is also heavy rainfall, seriously flooding occur many places in the city. The tidal amplitude ranges fiom 2.5 to 3.5m.

26 18 17

Thitng 10 - October 11 - November

Thhng 12 - December

The Tan Hoa - Lo Gorn basin has two distinct parts sloping towards the canal and can be divided into two main zones. There is relatively high land covering the upper part of the canal as part of District 11 and Tan Phu (between 6 and 8 meters above the sea level). The West and South part of the Lo Gorn basin is above 2.0 meters while Binh Chanh District and District 8 are low-lying swampy areas. Much of district 6, 8 and 11 are below the 2 meters elevation that is considered an important border since the river tidal range reaches to about 1.3 meters above MSL. Experience shows that gravity ditches and conduits can effectively drain land above 2 meters while, below 2m, sewers and drainage are tidally affected.

Source: Southern Regional Hydro-meteorological Center

1.47 1.85 1.95

3.1.3. Soil condition

Pleistocene sediment deposits cover the Tan Hoa - Lo Gorn catchments. The main composition is sand and clay. In low areas along the canal, layers of surface resulting fiom the rapid urbanization covered. According to the Service of Communication and Public Works, geology on the whole catchments is relatively favourable for construction of drainage works without special foundation. On the other hand, the geological study at the Pham Van Chi bridge base shows that land here is very weak. The Groundwater table is around 0.9 - 2.2 meters deep in dry season and may rise to 0.15 - 0.5 meters in rainy season. In the low lying areas of the catchments, the groundwater table is tidally affected, which affects the construction of any drainage system.

3.1.4.1. Tan Hoa - Lo Gom Canal System

Tan Hoa - Lo Gorn canal is located at the South-West periphery of inner city. The canal starts fiom Tan Phu district (Bau Cat area) and ends at the Lo Gorn - Tau Hu estuary. The TH-LG canal flows fiom the North-East to South-West and runs through districts Tan Phu, 11, 6, and 8. Its total length is about 16,870 meters, of which the main canal is 7,600 meters and branch canals are about 9,270 meters. The canal bed is getting narrower all the time due to illegal construction and irresponsible discharge of solid waste and building materials into the canal particularly near the bridges. The present average width and depth of the canal in each section are as follows:

Table 3.6 - Width and Depth of the Tan Boa - Lo Gom canal

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HULTPMU) 3 7 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


From up stream to Hoa Binh street

Width (m) 5 - 6

Depth (m) 2.50

Environmental Impact Assessment Report: VietNarn Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gorn Canal

the very small wastewater flow in comparison with the canal drainage ability. Most of

2.50 1 From Hoa Binh street to Tan Hoa bridge

From Tan Hoa to Ong Buong bridges

From Ong Buong bridge to Ba Lai arroyo

From Ba Lai arroyo to down stream

the wastewater discharged from the Tan Hoa Bridge to upstream remains for several days in the canal and the rest is washed and diluted daily by the Can Giuoc River. The

8 - 10

section from upstream to the Tan Hoa Bridge acts as a natural biological lake and is

In the dry season TH-LG canal is affected by the tidal cycle of the Saigon River and

10- 14

15 -21

mainly in an anaerobic condition.

2.50

2.50

Due to the heavy rainfall in the rainy season, the canal is less polluted because the wastewater is diluted and discharged directly into the river. However, the canal is getting narrower and consolidated and during heavy rainfalls, storm water cannot be discharged immediately downstream. Survey results indicate the following.

26 - 70

Flow measurement was carried out at three gauging stations on the Tan Hoa - Lo Gorn Canal in dry, intermediate and rain season for 24 hours. Tables 3.7 - 3.9 and Figures 3.1 - 3.4 will show the results of THLG flow studied by PMU 41 5 in year 200 1. + Hoa Binh Station (TV 1): Located at the upstream section of the Tan Hoa - Lo

Gorn Canal, 200 m downstream fiom Hoa Binh Bridge. The water resort of Dam Sen Park in Ward 3 of District 11 is on the left bank and the right bank is in Ward 20 of Tan Binh District. Canal width at this station is 5.6 m and the maximum water depth at the time of the measurements was 1.74 m.

+ Hau Giang Station (TV 2): Located at the central section of the Tan Hoa - Lo Gorn Canal and 50 m downstream from the Hau Giang Bridge. The left bank is in Ward 11 of District 6 and the right bank is in Ward 13 of District 6. Canal width at this station is 11.5 m and the maximum water depth at the time of the measurements was 3.22 m.

+ Cua Kenh Lo Gorn Station (TV 3): Located at the downstream section of the Lo Gorn Canal, 160 m upstream of the outlet fiom the canal which discharges into the Tau Hu Canal. The left bank is in Ward 7 of District 6, and the right bank is in Ward 10 of District 6. Canal width at this station is 32m and the maximum water depth at the time of the measurements was 4.40 m.

Table 3.7 - THLG flow in Dry Season 2002

Station

'I171 1 (H0aB.b)

(Hau Giang) F (Lo Gom) r I Source: THLG

Date

19 1 1


113 . 8/3/2002

Hmax Hmin (em) (cm)

I

?ow Measurement . Ref I50

11 1

Vmar (mls)

.94

Vmin (mls)

0.291

Qool (m3/s)

.0.104

Qbcl (m3/s)

Qio (m3/s)

90.17

Q (m3/s)

.34.13 56.04 2.24

Ewironmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

Table 3.8 - THLG flow in Intermediate Season 2002

I Station 1

TV1 (Hoa Blnh)

1 TV2

Table 3.9 - THLG flow in Rainy Season 2002

(Hau Giang)

TV3 (Lo Gom)

Date

1015 - 11/5/2002

1715 - 18/5/2002

1015 -

1 (Ham Giang) ' 11/7/2002 1 1617- I 85 I .82 I 0.466 I .0.032 I 54.44 I .0.73 I 53.71 I 2.15

Source: THLG Flow Measurement - Rej1.50

11/5/2002 1715 -

18/5/2002 .-- 1015 -

1 1/5/2002 17/5 -

181512002

Hmax (cm) 93

85

98

Station 1

Date

( H z n h ) 1 11;&02

L 1 17/7/2002 1 J Source: THLG Flow Measurement - ReJl.50

87

110

93

Hmax (cm) 83

124

82 I

TV2

( (Lo Gom) I


Emin (cm) 60

54

.65

1617 - 17/7/2002

1017 -

1 1/7/2002 1 1 1 16/7 - 94

.88

.lo0

.I52

Emin (cm) 58

55

.75

Vmax ( d s ) 0.455

0.399

--------- 0.397

0.364

0.274

0.419

Vmax (mls) 0.462

0.774

0.397

Vmin ( d s ) 0.179

0.175

.0.076

.0.070

.0.178

.0.197

Vmin ( d s ) 0.268

0.263

.0.103

Qout (m3/s)

26.39

23.22

33.81

37.47

~~~~~~

117.76

107.01

Qout (m3/s)

29.24

40.91

38.98

Qin (m3/s) 0.00

0.00

.0.42

.2.01

.61.95

.41.08

Qin (m3/s) 0.00

0.00

.4.18

Q (m3/s)

26.39

23.22

29.55

Qbq (m3/s)

1.06

0.93

35.46

Q (m3/s)

29.24

40.91

34.80

1.42

Qbq 1 (m3/s) 1.17

1.64 I

1.39

55.81

65.93 2.64

Environmental Impact Assessment Report: VietNarn Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

Figure 3.1 - Flow rate of THLG canal at Dong Den Street, March 01" to 03': 2001

Hoa - Lo Gom canal at Dong Den street from March 01 to 03,2001

i 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 1

lime (hour) I

Figure 3.2 - Flow rate of THLG canal at Dong Den Street, Juiy 0 2 " ~ to 04", 2001

Flow rate of Tan Hoa - Lo Gom canal at Dong Den I + Day 1 1 street from July 02 to 04,2001

I 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7

Time (hour)

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMZT) 40 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Emironmental Impact Assessment Report: VietNam Urban upgrading Project - ~ o ~ h i Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

I 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7

Tlme (hour)

Figure 3.3 - Flow rate of THLG canal at Hoa Binh bridge, March 01" to 03.~, 2001

Figure 3.4 - Flow rate of THLG canal at Hoa Binh bridge, July 0 2 " ~ to 04", 2001

Flow rate of Tan Hoa - Lo Gom canal at Hoa Binh bridge from March 01 to 03,2001

1 low rate of Tan Hoa - Lo Gom canal at Hoa Binh bridge 1 +- Day 1 / I

+- Day 1 - Day 2

from July 02 to 04,2001 1 4 ~ ~ 1 ~ 2 ~ 1

I 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7

Time (hour)

Figures based on the flow rate measurement results at Tan Hoa - Lo Gom Canal on March and July, 2001

3.1.4.2. Description of the drainage system The drainagelsewerage system consists of a network of open channels and underground closed conduits which collect and carry both storm-water runoff and wastewater. Flows in the Tau Hu Canal and the downstream section of the THLG Canal are




influenced by tidal effects in the Saigon River and other nearby rivers. The undergroundlclosed conduit systems are also influenced by tidal effects. The THLG basin and existing drainagelsewerage system are shown in Figure 3.5. There are several systems of inter-connected underground conduits that convey stormwater runoff and wastewater in the THLG Canal basin. The stormwater runoff and sewage collected is discharged through 3 1 main outlets which have been identified, most of which are connected to the THLG Canal. Many of the outlets are located below the normal canal water level. There are a few low-lying areas in the basin that act as natural flood storage areas and mainly collect local stormwater runoff or overflows fiom flood events. A review of the information currently available and discussions with relevant departments revealed that the discharge capacities of the canals and the underground systems are inadequate, resulting in fiequent flooding and surcharging of the system, even for minor rainfall events. The flooding condition is made worse by the tidal influence on the canals fiom the Saigon River and other rivers during rainfalllflooding events. Flood inundation areas in the Tan Hoa-Lo Gom canal basin is shown in Figure 3.6.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (EfUUPMZT) 42 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Ewiroomeotal Impact Asusmeot Report: VietNam Urban Upgrading Project - Ho Chi Mi& Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Akng Tan Hoa -Lo Gom C d

Figure 3.5 - The THLG basin and existing drainagelsewerage system

-.om - ,m -00 - - -00

MLG Boundary


Ewironmental Impact Assesmeat Report: VietNam U h Upgradixg Project - Ho Chi Mi& Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gom Canal

Figure 3.6 - Flood inundation areas in the Tan Hoa-Lo Gom canal basin

bodng caused by rain (1 1)

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (EUUPMU) 44


Emironmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gom Canal

3.2. SOCIO-ECONOMIC CONDITION IN SP.04 AREA STUDIED IN MARCH 2009

The current socio-economic situation at Tan Hoa - Lo Gom basin can overview through the household's interview sheets that was carried out by the RAP consultant' staffs. There are 719 interviews were taken in District No.6, No.11 and Tan Phu district and detailed in Table 3.10 . Table 3.10. Numbers of household' interview sheets

1 Ward No. 14 I 58 I

District

Ward No. 5 Ward No. 7

Number of PAHS Project ward households

14 7 7

District No. 6 Ward No. 11 Ward No. 12

I

Tan Phu District

Reference on the results of the household's interviews, the general picture of socio-economic situation at Tan Hoa - Lo Gom basin is shown as bellows:

3

8 Structure of households: following survey, there are many small households in a big household with many habitants, in which, about 60% of households with 3 - 5 persons, 5% of households with 4 persons, so each households has 4,5 persons in average. 30% of households with 1 - 3 persons, 10 % of households with 6 persons, 15% of households with more than 7 persons. Education: About 30% of population is being under primary school education, about 35% of population is being under secondary school education, about 18% of population is being under high school education 111. About 5% of population of illiteracy and about 6 % spent or have been spent university training. Career and income: Collected data fiom SES survey shows that households in the project areas have unstable income. Their main income is fiom unstable jobs (motorbike driver, selling or waste business). Income earned fiom these jobs is rather low:

Hoa Thanh ward Tan Thoi Hoa ward

Phu Trung ward

Ward No. 3 District No. 11

29

TOTAL


45 5 4 141


Figure 3.7 - Income of households in project area

OVND 3- 5 million

V N D 5-8million

Bover VND 8 million

Expenditure Expenditure rate of households in project areas is divided into 04 ranges: (1) Under VND 3 million; (2) VND 3. 5 million; (3) VND 5. 10 million and over VND 10 million. From collected results fiom SES survey, it is shown that mostly households have expenditure rate of about VND 3. 5 million (37,6%), under VND 3 million (30.8%) and VND 5.10 million (6.8%). The lowest expenditure rate is VND 8 million (4.8%)

Figure 3.8 - Expenditure of households - wards

8 Under VND 3 million

8 VND 3-5 million

0 VND 5-8 million

Over VND 8 milliontr

District No. 6 Tan Phu Disbict District No. 1 1

House and land possession status

+ The time of arrival: mostly households in the project area have arrived and lived for a long time (fiom 17.20 years). According to survey results, 46.3% of households arrived to live in current addresses before 15th October 1993, then 41.5% of households arrived to live in current addresses before 1 gth December 1980 and 12.2% of households arrived to live in current addresses before 1 5 ~ October 1993.

+ Housing status: There are 04 types of houses in project area: independent houses (69.1%), adjacent houses with one separating wall (10.4%), adjacent houses with two separating walls (17.9%), and adjacent houses with three separating walls (2.6%). Land possession status at project area is as follows.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HLTLTPMU) 46



Table 3.11 - Housenand status at districts

Land possession status

District

i I

No. 11

+ Location of houses: mostly households which are affected by sub-component No. 4 are located along channels or in alleys. About 113 of households are those facing

1 I I I I

road.

~ ~ t a l

100.0%

20.0% 0%

Total 1 1 100.0%

Being disputed

.O%

Without construction

license 41.4%

With construction

1 icense 37.9%

.O%

.O%

Table 3.12 - Location of houses in project area:

With house possession certificate

20.7%

Be requesting for eligibility

.O%

1 1 2

15.0% 2.5%

Rate (%) b o .

3 1 Houses in alleys of 3.5 rn

Social infrastructure

Location of houses

Road facing houses Houses in alleys of over 5 m

4

5 Total

+ Water supply: Generally, there are fountains for use in project area. According collected results of site visit, there are 2 using modes of clean water in this area: (i) having tap-water for use with separated water meters (78%) and (ii) buying tap- water for use or connecting to use (7.4%). The rate of households using water fiom drilled wells or deep wells is 14.6%

2.0% .O%

28.8 18.9

100.0

+ Power: Households in the project area are supplied with electricity (loo%), with about 85% of households having watt-hour meters and 15% of households use power with households who have main watt-hour meters.

-- Houses in alleys of under 5 m

Houses along channels

+ Phone: About 314 of households (75 %) having telephone and 99 % of households having handphones.

45% .O%

14.2

23.5

+ Sanitation equipment: About 90% of households have toilets, about 72% of these toilets are connected with septic tank and 20% connected with public drainage system. About 85% of households have septic tank in houses and 67% of these septic tanks are discharged into public drainage culverts.

100.0% 2.5%


Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gorn Canal

+ Rubbish collection: About 95% of households using urban rubbish collecting survices, in which, 1/3 of them using rubbish collecting system by 3.wheels vehicles. About 15% of households using other means to treat their rubbish, over 113 of households (40%) dump rubbish at local rubbish dumping yards and 5% of households disorderly dumping rubbish everywhere (even throw rubbish to channels and drains).

+ Flooding: About 113 of households is flooded at the end of the year. However, impact scale is small with % of households which are flooded in only 1 day and 27% of households are flooded in 2 days. About 40% of households are flooded in 3 - 4 days and 17% flooded in 5 days or longer. Generally, residents of ward No.6 are suffering environmental in~pacts due to flooding situation of Tan Hoa - Lo Gom channel.

33. PROJECT AREA SURVEY

33.1. Project Route Profile

In February 2009, a survey at project route was carried out by environmental consultants and the profile of project route can general describes as below:

Canal side road: Asphalted road with 5.7m width, pathway with 2.5m width Infrastructure: Medium voltage electric poles are along the canal bank, a lot of electric wives are across the street Landscape: Level.4 houses has metal sheet roof covering which is not strong, small trees along canal side road The detail profile of project route is presented in Annex 3.1.

33.2. Sensitive receiver

Sensitive receivers along project route are listed in Table 3.13.

Table 3.13 - Sensitive receivers along project route

I No.

1

1

I ~ ~ ~ k ~ ~ ~ ~ ~ , " " d ~ l 1 1. Market and Apartment Lo Gom 1 Impacted during construction 1

Sub-section Lo Gom Street, From Building bridge area to Pham Van Chi street

Lo Gom Street. From Van Binh

) 4 1 Hoang Le Kha Street to 1 1. Organ Army (~mpacted during Construction I

Ngu~en VanLuabSmet and From Ly Hoang

Van Chi Street

Than Street - Ba Lai Street - Bai Say S-t - Phan Van Kboe Street

Buildings 1 . College of Food Technology

2. Pham Van Chi Primary School

1 " JHong Bang Street 2 . Thien Truoc Pagoda

-

Status Impacted during Construction Release of 1-2 meters and impacts during construction

1. Cao Dai Pagoda 2. phuLamCollege 3. Cung Hy Restaurant 4. Center for children of D.6 5. Gas filling station on Nguyen

Van Luong Street

2. Children's nursery 3. Ward Community Office

~ o n g Bang Street 1 Hau Giang Bridge to ) 1. Organ police


Impacted during Construction 1 Released 1-2 m and Impacted during Construction

- ~

T,,,,.+,A A. i n g Construction

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - La Gom Canal

3.4. EXISTING ENVIRONMENTAL CONDITION OF PROJECT AREA

Released 15-20 m I

l g l F r o m ~ u ~ n h Thien Loc + Street to Thoai Ngoc Hau

Phuong Nam School

street I + Tri Duc School

3.4.1. Surface Water Quality

3. Thao Duong Thien Tu Pagoda

Impacted during Construction

3.4.1.1. Surface Water Quality of Tan Hoa - Lo Gom Canal downstream canals

' *

During construction and operation phase, the location of the Project site may directly effect on water quality of the TH-LG canal and several canals at the downstream as Tau Hu - Ben Nghe canal, Ruot Ngua canal. Therefore, water quality study has been carried out in 2002 for FS study and in March 2009 for SP.04 EIA study. The locations of sampling points is described and illustrated in Table 3.14 and Figure 3.9.

6

Table 3.14 - Surface Water Quality sampling station

Near Tan Hoa Bridge 1. Hanh Nguyen Pagoda Beginning Tan Hoa canal to Hoa Binh Street

to H U ~ I I L Van chinh street Alone: Tan Hoa Canal

Dam Sen Park Partly released 1 -2m and Impacted under Construction

+ Khmng Viet Apartment Impacted during Construction

+ Tan p hu School

Source: Feasibi l i~ Study on Sanitation and Urban Upgrading of TH-LG Canal Basin, Volume 7. March 2003 and CEECO March 2009

No

1

2

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMCr) 49


Location

AuCoSt

Huynh Thien Loc St ("alcohol village")

3 Hoa Binh Bridge ~:10~45'54.1"

4 TanHoaBridge A4 -

5 Near Hau Giang Bridge (100 m) N:10°44'37.2"

Code

A2

6

7

8

Position N:10°46'5 1.7" E: 106~38'45.8" N: 10~46'22.8" E: 106~38'32.4"

pp

Confluence TH-LG Canal - Tau Hu Canal

Letter U Bridge - Tau Hu Canal -

Van Nguyen Bridge - Tau Hu Canal

~:106~38'35.1"

A6

RA7

N: 10~43'52.8" ~:106~38'12.7" ~:10~44'01.1" E: 106~38'29.5"

Environmental Impact Asusmcnt Report: VietNam Urban Upgrading Project - Ho Chi Minh S6Project Sectorial Project No.4: Improment of Canal and Roads Along Tan Hoa - Lo Gom Canal

Figure 3.9 - Location map of surface waterlsediment and air quality sampling sites

I______-____

Location map of surface water and sediment sampling sites


Environmental Impact Assessment Report: VietNam Urban upgrading Project - ~ o ' C h i Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

The results of water quality analysing in 2002 and 2009 are presented in Appendix 33. The water quality characteristics of the TH-LG Canal and downstream may be summarised as follows: + Results indicated that seasonal effects are more limited than those exhibited by tidal

cycles. Almost all monitoring parameters at all sites show high variability, with no clear correlation between contaminant concentration /distribution and seasonal factors. This characteristic is attributed to the intermittent flows of high concentration industrial wastewater to the TH-LG Canal commonly associated with batch processing activities from some industries.

+ The most conspicuous element of the water quality conditions concerns the very high levels of organic pollution both in 2002 and 2009 survey, as reflected in very high BOD and COD values, particularly under low flow conditions at Stations A2 to A4. During neap tide low water conditions where low flows and reduced tidal excursion interact, Stations A4 and A5 showed the highest recorded COD levels 2,360 mgll (2002) and 81 1mgII (2009) in relation to a compliance standard of 50 mgIl for B2 Class of QCVN 08:2008. However, COD value in 2009 sampling time seem to be decreased.

+ DO values at all the TH-LG Canal sites are very low both in 2002 and 2009 sampling times (usually below 1 mgll), and there is little evidence that tidal exchange exerts significant influence on these values other than downstream of Station A5. The only station where significant changes were recorded between high and low water was Reference Station RA8, which was the only station complying with the QCVN 08:2008 . B2 Class standard of >2 mgll. Under low tide conditions no stations achieved compliance.

+ Temperature conditions are generally high but particularly hot effluent (>360 C) at Station A2 is probably indicative of discharges fiom the textile sector in Tan Phu District (bleaching and dying).

+ Faecal coliforms values recorded in 2002 also 2009 exceeded the standard values of QCVN 08:2008 (10,000/100ml) by several orders of magnitude and conspicuously so at Station A3 (spring tide, high water and at Stations A4 and A5 (neap tide, high b water) with maximum values of 13 * 10 /100ml.

Generally heavy metal concentrations in water at all monitoring locations and in all monitoring times (2002 and 2009) were below the QCVN 08:2008 B2 Class value. The high toxicity metals including Mercury (Hg), Cadmium (Cd) and Arsenic (As) were present only at very low levels and in many instances fell below detection limits (0.1 . 0.2 pgIl). Zinc (Zn) and Chromium (Cr) were the most commonly occurring metals, and chromium in 2002 significantly exceeded the QCVN standard at Stations A1 to A6 under different tidal conditions. Both Zn and Cr are closely associated with textile (bleaching and dyeing), tanning, and metal-finishing industries and these values generally correspond to the high values of these metals found in sediments, and to the industrial structure in the catchment. It is concluded that because metals are commonly adsorbed to the organic surfaces of particulates under these conditions, it is to be expected that they would be more evident in association with the sediments than in the water column

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HITUPMU) 5 1 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Assessment Report: VietNam Urban Upgradixg Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gom Canal

3.4.1.2. Water Quality at sludge disposal site

Surface water quality data at sludge disposal site were collected by the data presented in the EIA report of Da Phuoc Site which were carried in 2008. The results of analysing of Nga Cay and Chieu Creeks are presented in Table 3.15.

Table 3.15 - Surface water quality at Da Phuoc sludge disposal site

No Parameters Units Sampling stations TCVN

M1 M3 5942:1995 B

M2 Class

26

Remarks: According to the Table 3.15, it shows that: most of analyzed parameters are meet standard TCVN 5942 - 1995, column B. Apart of SS, N.NO2 and coliform exceeded the standard. In general water quality of Rach Chieu canal has slightly pollution.

No. 1 2 3 4


substance Coliforms

Codes M1 M2 M3

pp

M4

MPN/lOOml

Locations Nga Cay and Rach Chieu canals intersection Rach Chieu canal - at a distance of 3 10 m to MI upstream direction. Rach Chieu canal - at a distance of 950 m to M1 upstream direction.

5700 1 1 *lo3 4.600 24*103 7.500

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gom Canal

3.4.2. THLG Ground Water Quality Data

The gound water quality data in project area had been taken in the FS phase, some of results of households' well in District 6, 1 1 and Tan Phu district are presented in Table 3.16.

Table 3.16 - Ground water quality data in project area

3.4.3. Tan Hoa -La Gom Canal Sediment Quality and Garbage in Sediment

3.4.3.1. Sediment Quality

Of 64 samples taken during the sediment quality monitoring, 31 samples (48%) exceeded the PEL sediment contamination standards.

District 6

I I I I I I I I I

Source: Feasibility Study, 2003. Remarks: According to the Table 3.16, it shows that: most of analyzed parameters are meet standard TCVN 5944 - 1995. Apart fiom Fe parameter, it exceeded the standard in many times. In general, ground water in project area has slightly pollution by Fe, so that all well did not meet the Standard of Domestic Water supply in urban area issued by MOH

Mn (m%l)

The high toxicity components (Hg, Cd, and As) were generally low in all locations and were below detection limits in some cases. The metals most fiequently exceeding the standards were Zn, Cr, Pb and Ni, which occurred at seven of the eight stations monitored (87.5%) (The location and coding of the water and sediment quality monitoring stations is described and illustrated in Table 3.13). The detail of analysic results are presented in Annex 33. In terms of distribution, Station A4 and Station A6 recorded the highest frequency of metals exceeding the PEL standards, fol.lowed by Reference Station RA7 (outside the canal). When stations are ranked in relation to the highest metal concentrations for all parameters, Station 6 (opposite Pham Van Chi Street) is conspicuous as maintaining the worst overall sediment quality. Surprisingly Reference Station RA7 in the downstream receiving waters was the second most polluted site but Reference Station RA8 was the cleanest. The very high metal values in sediments at Station A6, which are not evident in the water column, may be related to the very high BOD, COD and SS values recorded in the water column and high sediment TOC values, which play an important part in the binding of trace metals through sorption or complexation.

SO? (W)

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMZT) 5 3 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Cr (mgfl)

~ e ' + (mgfl)

TDS (mu)

pH Hard (W)

Depth of well (m)

No NOi (mgfl)

Sampling site NHs Own)

Environmental Impact hessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

It is noticeable that Station A5 generally shows much lower values than both upstream and downstream stations, however very high lead levels were recorded at this location and it seems likely this is related to the battery production enterprises in this area of the catchments. It is observable that recorded PAHs are present in the sediments at moderately high concentrations. The major route of entry of PAHs into the environment results from spillage of crude oil or petroleum products, and through industrial processes (gas manufacture). PAHs are of concern because they are carcinogens, are persistent in the environment, and some forms produce cell damage in aquatic organisms. These anthropogenic PAHs reach the aquatic environment in industrial and domestic wastewater discharges, through surface run.off and through deposition of airborne particulates. In the present case, the very high PAH values recorded at Station A4 are attributable to the direct dumping of oil waste adjacent to the bridge. This practice, has been observed by the project team, and appears to be a routine form of disposal at this location. In March 2009, CEECO Consultant carried out the environmental monitoring for SP.04 EIA study, one sampling occasion was conducted for sediment quality of Tan Hoa Lo Gom and downstream canals, the locations of sampling sites were at the same with 2002 sampling time. The results of pollutants analysis 2009 are presented in Table 3.17.

Table 3.17 - Sediment quality analysed in 2009 in comparison with 2002 sampling time

Remarks: According to the Table 3.17 it shows that: all parameters (apart fiom Hg and As parameters) was higher than the PEL value in some sampling station but still meet the value for disposal at a landfill both in 2002 and 2009 sampling times. In general, sludge in the bottom of Tan Hoa Lo Gom canal was contaminated by heavy metal especially by Pb parameter, so the sludge will be assemment carehlly before disposal.

3.4.3.2. Garbage in canal

The physical - mechanical composition of garbage in sediment is presented in Table 3.18.

Table 3.18 - Physical - Mechanical Composition of Garbage in Sediment

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (EIUUPMCT) 54 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

r Components

_ A. Flammable solid waste 1. Paper 2. Organic waste 3. Textile

.4 . Wood/ weedl straw 5. Plastic 1,620 2,03

Note Analysis results Weight (kg)

0,038 0,020 7,275

Weight (%)

0,05 0,03 9,09

Environmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gom Canal

Dry density: 463.6 kg/m3

Source: CEFINE.4, 1999. Ref 89 Sampling site: Tan Hoa - Lo Gom Canal Total of sample: 2m3 (get 80 kg) Sampling characteristics: sedimentlgarbage

1 include bone and arca cover)

C. Mixture

. -

( Sampling date: 12/06/1999

0,58

0,34 0,68 0,41 6,87

-hand rubber B. Non.flammable solid waste 7. Metal (iron) 8. Metal (other) 9. Glass 10. Rock and china

3.4.4. Existing Wastewater Discharges to the TH-LG Canal

0,461

0,269 0,540 0,328 5,494

Wet density: 1230.8 kg/m !==--- 65,594

Investigation of wastewater discharges fiom sewer outlets to the TH-LG Canal to determine wastewater characteristics including linkages to industrial sources was undertaken and included:

78,24

+ Survey of the existing situation, and flows of all 21 operating sewer outlets that discharge into the TH-LG Canal

+ Analysis of physics-chemical characteristics of wastewater fiom these sewer outlets + Preliminary evaluation of wastewater sources + Provision of input data for water quality analysis to assist determination of the

preferred wastewater treatment option. The survey subsequently investigated the 21 sewer outlets to the TH-LG canal that were identified as the principal wastewater discharge points. For each sewer outlet, flow measurement was carried out over a 12.hour period (fiom 6 am to 6 pm). Sewage samples were taken only during low water conditions when the flow was directly discharging to the canal. Limiting factors in flow monitoring in the TH-LG sewers is determined partly by the existing elevation constraint. The elevation and gradient of the sewers means that 50% of the monitored outlets can only be measured for 6.7 hours due to tidal conditions as flow reversal occurs during high water. Similarly because flow monitoring could only be undertaken over a 12.hour period, it has been necessary to assume that peak water consumption occurs during daytime. In practice, batch processing in certain industries may mean peak discharges fiom certain sources occur at night, outside the main monitoring period. Taking into account these factors it is estimated that the current total wastewater discharge fiom the main sewers is about 1.6 m3/s. However, it should be noted, that this figure does not include flows fiom the three substantial sewer outlets at Hau Giang Bridge (C9), Ong Buong Bridge (C13) and Nguyen Can Street (C19) because of data uncertainties associated with tidal contributions to the recorded flows during monitoring. The results of wastewater in sewer are detailed in Appendix 3.4. In summary the analysis indicates the following:



+ Most of the in-situ sewage measurements indicated that DO levels were less than 1 mg/l, which is not surprising due to the industrial sources but is still extremely low. The wastewater temperature varied fiom 29.7OC to 35.6OC, with 81% of samples showing temperatures of less than 32OC (ambient) and 14% of samples recording temperatures greater than 34°C. This applies especially to the group of sewer outfalls at Hoa Binh Bridge where effluent sources include food processing, bleaching and dyeing, paper and plastic processing industries.

+ pH values varied around 7 (fiom 5.07 to 7.41) and although not changing much according to time, higher values were generally recorded in the morning, reaching a peak at mid day, and decreasing in the afternoon. Some sewers showed pH values which varied significantly, especially upstream sewers such as C16 (Tan Hoa Bridge), C22 (100 m downstream Hoa Binh Bridge), C23 and C24 (to the left and right of Hoa Binh Bridge), and C27 (at Huynh Van Chinh Bridge)

+ The rapid pH fluctuations in some sewers probably reflects batch processing activities by industry, and needs to be taken into consideration when designing the TH-LG wastewater treatment system. The current findings are consistent with the previous study results.

+ The monitored suspended solids (SS) values varied fiom 43 mg/l to 91 5 mgll. Most samples meet TCVN 5945.2005 Class C, and nearly 20% of samples meet TCVN 1995 Class B. Only in one case did the SS significantly exceed TCVN Class C (Hoa Binh Bridge - C23) where 915 mg/l was recorded. Overall the results showed a high level of consistency with previous studies.

+ Recorded COD and BOD values are extremely high. None of the recorded COD concentrations comply with TCVN 5945.2005 Class B, and 50% fail to comply with the Class C standards. Similarly, for BOD5, 80% of samples failed to comply with TCVN 5945.2005 Class C. 95% of samples show COD values in the range of 1 1 1.1,000 mg/l(557 mg/l on average) and 95% of samples also show BOD5 in the range of 48 to 457 mg/l (31 1 mgll on average). One sample was characterised by extremely high COD and BOD5 concentrations of 3,225 mg/l and 2,000 mg/l respectively. The BODICOD ratio is within the range of 0.56 - 0.75 (mean =0.56) which is consistent with the 0.55 average recorded in the CEFINEA (2000) study.

3.4.5. Air Quality and Noise in Tan Hoa -Lo Gom Canal Basin

The air quality in TH-LG Canal basin is significantly affected by: + Foul odour fiom TH-LG canal due to the presence of NH3, H2S, VOC, and

pollutants generated fiom wastewater and fiom surrounding industries + Industrial air emissions fiom a wide range of SMEs located in residential areas + Air emissions fiom vehicles and traffic congestion + Air emissions fiom routine cooking activities, and other services The impact of bad air quality in canal-side communities is evident both through the incidence of respiratory disease among local people, and the damage to infrastructure and domestic equipment near the canal. The public has expressed particular concern about air pollution during interviews and in community focus group consultation.

= Baseline air quality monitoring in the TH-LG project area was undertaken in November 2002 at four stations in order to verifj, existing conditions. Sampling was undertaken at two time periods; off peak hours (10 am and 3:00 pm) and peak hours when traffic flows are at their maximum (7:OO am and 5:00 pm). The four stations were selected on the basis that all might be potentially affected by the proposed TH-



LG infrastructure development programme, but gives also general idea of the air quality in THGL canal basin: + Phu Lam Roundabout - the intersection of Nguyen Vu Road and routes from Tan

Hoa are transport pressure points with routine congestion during peak hours. This site was selected on the grounds that canal side road development (north-south links) proposed for the TH-LG basin project may modify peak traffic flows and subsequent emissionslair quality.

+ Nguyen Van Luong Street in District 6, is the proposed location of the sewage pumping station site of TH-LG project

+ The Hoa Binh Bridge monitoring station will represent the southern end/intersection of the new 20 metre north-south road between Hoa Binh and Au Co in District 10 of Tan Phu District

+ The Hau Giang Bridge (near the canal) was seen as representative of canal-side conditions, which will also be subject to a wide range of construction activities

The detailed results are presented in Appendix 3.5 and summarized as follows: + N@, SO2, and CO concentrations do not exceed threshold limit values based on

ambient air quality (TCVN 5937, 5938.2005) at the four monitoring locations at the different time periods.

+ The concentration of suspended particulates exceeded the air quality standard most of the time - of 16 observations at 4 stations only the stations at Hau Giang Bridge and Nguyen Van Luong Street (the pumping station site) complied with the standard during off peak hours but these stations were also non-compliant during peak hours.

+ NH3 and C& concentrations are higher than the allowable standard in populated areas, especially at measured locations near Hau Giang Bridge and Hoa Binh Bridge There was no significant difference between NH3 and C& concentrations measured during different monitoring periods, so in the absence of any correlation with time and traffic conditions, it is concluded that the high values of these parameters are almost certainly associated with emissions from TH-LG Canal.

+ The trafic conditions do strongly influence some air quality parameters, and this was noticeable at Phu Lam Roundabout when very high trafic volumes (3,906 motorcycles and 802 card15 minutes) during peak hours result in a near doubling of NO2 values during peak traffic flows time compared with off peak periods.

+ In general, the two stations of Phu Lam Roundabout & Hoa Binh Bridge had worse air quality than the other locations and this is attributed entirely to higher traffic volumes.

Noise monitoring results from DONRE indicate that noise at most roundabouts and road junctions exceeds permitted limits, being in the range of 80.85 dBA, and even up to 98 dBA. Results from recent noise monitoring indicated that noise at most measured sites exceed threshold limit values based on allowable noise levels in residential areas (TCVN 5949.1998), especially at Phu Lam Roundabout. At peak periods traffic noise levels reached up to 93 dBA.

3.4.6. Ecological resource

The project area is located in the urban area (District N.6 and N. 11, Tan Phu District) so there is no typical ecosystem in the project and surrounding area, except planted trees along both side of several existing roads.


Environmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

Recent biological surveys undertaken in September 1998-1999 and June 2002 showed the THLG Canal bed to be contaminated with no evidence of zoobenthos, and only some species of phytoplankton and zooplankton found. Most phytoplankton and zooplankton were distributed from Hau Giang Bridge to the confluence with the THBN Canal downstream, while upstream of Hau Giang Bridge only disintergrated organisms were detected. The surveys detected 33 species of phytoplankton during the dry season and 46 species during the rainy season, comprising mainly Cyanophyta (45%) Euglenophyta (24%) which are indicators of polluted water. Other species found include Coscinodiscus jonessianus, Coscinodicus radiatus, Chaetoceros compactum, Gymsigma acuminatum, which are indicators of brackish water, Arthroprra gomotiana, Phormidium fragile, Eunotia sudetica, Eunotia tautonensis, Navicula grevilleana, Closteriopsis longissima which are indicators of for acid water, and Stephanodiscus sp. and Scenedesmus which are indicators of organic polluted water. The phytoplankton quantity is very high from 279,000 celVm3 in dry season (dominant with Cyclotella meneghiniana) to 642,000,000 cel Vm3 (Stephanodiscus sp. dominant). Twelve species of zooplankton were found (10 species in the dry season and 7 species in the rainy season). Rotatoria species were dominant (40%). Species found include Platyias patulus, Heterocypris anomala which are indicators for acid water. Species Rotaria neptunia, Philodina roseola, Brachionus urceus, Bosmina longirostris, Moina dubia, Mesocyclops leuckarti, Zoothamium arbuscula indicate polluted water at medium-level (mesosaprobic) to high-level (polysaprobic). The phytoplankton quantity varied from 1,300 to 2,300 celVm3,



CHAPTER FOUR ASSESSMENT OF THE POTENTIAL ENVIRONMENTAL IMPACTS

OF THE PROJECT

4.1. IMPACTS IDENTIFICATION AND CLASSIFICATION

The project "Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal" is considered as Sectoral Project No.4, Hochiminh Urban Upgrading Project belonging Vietnam Urban Upgrading Project.

This project will produce both advantages and disadvantage in term of economy, society and environment. Such positive impacts and negative impacts are predicted and classified as follows.

4.1.1. Positive impacts

Once finished, the project will provide much positive benefits in long term which are the followings:

Surface water quality in Tan Hoa - Lo Gom will be improved because drainage ability of Tan Hoa - Lo Gom increase significantly. In the fbture when a WWTP will be constructed, water quality in Tan Hoa - Lo Gom and related canals in the downstream area will be remarkably improved. Thanks to the improvement of drainage ability and water quality, flooding in this area will be reduced, and public health will be improved as water borne diseases will be decreased. Aesthetic improvements will also result from improve landscaping and the construction of parks and walkways along the canal. Furthermore, land value and land-use will be change in the positive trend, and economic activities will also be increase.

4.1.2. Negative impacts

This EIA report mainly mentioned about negative impacts in three stages: Project Design and Pre-construction Phase, Construction Phase and Operation Phase (see Table 4.1 for details).

Table 4.1 - The potential environmental impacts of the project

No. 1

Encroachment on historical/ cultural Project design and preparation

Encroachment on technical facilities

Operationlactivities I Potential impact Project Design and Pre-construction Phase

( Encroachment on residential land Minor, short term, unavoidable, controllable

I

2.2 Dredging process 1 I

Significant level

Site clearance and site 1 2*1 1 preparation

2


Demolishment waste

Surface water pollution caused by

2.3

Construction Phase Medium, short term, unavoidable, controllable Minor, short term,

along the existing roads I

Transport and disposal of com~ounds fiom dredged material A -

, ,

unavoidable


-- No.

2.4

2.5

dredged material

Operation of transport vehicles, construction equipment and machinery

Activities of construction workers

Operation phase

Increase in traffic density

Increase in water consumption and population

Land use change

Potential impact vessel using transport dredged material Air pollution caused by odour compounds fiom dredged material Surface water pollution caused by accidental spills of dredged material and cooling water containing oil and grease

Soil pollution and underground water pollution caused by disposal of dredged material

Air pollution due to fugitive dust and exhausted gases fiom trucks

Noise pollution

Vibration impact

Waste oil fiom maintenance process

Obstruction on traffic system

Domestic solid waste

Domestic wastewater

Conflicts between workers and workers, worker and local people

Health and safety issues

Air pollution due to fugitive dust and exhausted gases

Noise pollution

Increase in probability of traffic accident

Increase in wastewater amount in Tan Hoa - Lo Gom basin Visual impact: Improve urban landscape

Increase in land value in the area

Increase in economic activity in the area leading to increased wastes

Significant level unavoidable Medium, short term, unavoidable

Minor, short term, unavoidable

Medium, long term, avoidable by applying suitable disposal technology High, short term, unavoidable Medium, short term, unavoidable, controllable Medium, short term, unavoidable, controllable Medium, short term, unavoidable, controllable High, short term, unavoidable, controllable Medium, short term, unavoidable, controllable Medium, short term, unavoidable, controllable Minor, short term, controllable Medium, short term, manaeeable

Medium, long term, unavoidable Medium, long term, unavoidable High, unavoidable, controllable Medium, long term, - unavoidable, High positive impact High long term positive impact High, long term, positive economic impact but could be negative environmental impacts if not managed


Environmental I m ~ a c t Assessment Report: VietNam Urban upgrading Project - ~ o ~ h i Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

4.2. IMPACT ASSESSMENT IN PROJECT DESIGN AND PRE- CONSTRUCTION PHASE

4.2.1. Socio-economic impacts by encroachment on land use

The potential positive socio-economic impacts of the project have been analyzed in RAP. In this EIA Study only negative impacts on local socio-economy caused by the change in land- use due to the encroachment of the project are analyzed. The major socio-economic negative impacts are identified as follows.

Often, the lands and neighborhoods selected are those of "vulnerable groups" who can least afford the costs of dislocation and whose living environment is already impaired. If these considerations are not included in project, there is substantial risk of solving one community's environmental problem by transferring it to another.

The potential negative impacts of improper compensation and resettlement can be identified as below:

To conflict between investor and households due to improper compensation and resettlement. These causes complicated social issues and the project timefiame will be delayed. Life of people being resettled will be disordered due to loses of land and time to familiarize with new place resettlement. Income of people living in the STP site will be impacted if their work is influenced.

Statistics of impacted land, houses and architectures is presented in Table 4.2.

Table 4.2 - Statistic of impacted land and house in project area

No.

.. ......................................................................................................................... district I 1 59 1 10 1 69 1 7.069 1 7.069

ward

District

District No. 6

4.2.2. Encroachment on cultural sites

Project wards

Ward No. 5


3

Cultural resources include architectural, historical, and archaeological sites, as well as areas of unique importance because of their ecological, scientific, or geological information (Larry W. Canter, 1997).

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HULTPMU) 61


Ward No. 14

Thanh Ward

District 11

Number of DPs

122

99

Total:

Affected square area

(m2) 45 6

- 9.682 3.441

12.064

2.876

Phu Trong ward 3

Housed 1 architectures

(m2) 45 6

9.682 3.44 1 ........ .- .

Total

29 . -.

304

...................... 133 ~- -...

. . 235 .- ...

67 -. .....

Partly

25

56

57 -. 9.090 -.

- 5.235

12.064 -

2.876

118

4

850

Wholly

4

248

.- 76 150 53


9.090 5.235

240

103

162 1

85 14


1351

100 70

16 51

17.224 10.670

312- 412 - 1 7.224

2.201

309 379 - -

178 52

- 10.670

86.771 57.991

4.908 4.055

4.908 4.055

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Roject Sectorial Roject No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

In project area and surrounding area, there are only 6 cultural sites possibly affected directly by the project as listed and figured out in Table 4.3.

Table 4 3 - Cultural sites in project area and nearby area

I No. I Historical site ( Description I picture 1 1 Binh Long shrine A small shrine in area of

Ba Lai and Van Than street In project site

Outside project site

3 Thao Duong Thien Near Ong Buong bridge Tu pagoda (80 - 100 m)

A part in project site

i Thien Truc pagoda Behind Thao Duong Thien Tu pagoda

I A part in proiect site


Euvironmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

( No. Historical site 1 Description

Sumary: 2 shrine, 1 oractory and 3 pagodas

The above cultural sites will be removed wholly or partly. Therefore, the impacts caused by the project can be destruction, disruption or disturbance (see Table 4.4).

Picture

6

In order to evaluate the level ofthese impacts, the following criteria are used (Larry W. Canter, 1997):

= No effect: There is no effect of any kind (that is, neither harmful or beneficial) on the historic properties.

HanhNguyen pagoda

No adverse effect: There could be an effect, but the effect would not be harmful to those characteristics that qualify the property for inclusion of cultural and historical monuments regulated by the government.

Outside project side

Adverse effect: There could be an effect, and that effect could diminish the integrity of such characteristics.

For this project, all cultural sites are small - medium, and not cultural and historical monuments, so the impact level is no adverse effect (see Table 4.4). However, because these are mainly religious site, the suitable mitigations must be concerned and required.

Table 4.4 - Impacts on cultural sites

No. Cultural site

Binh Long shrine

Ngu Hanh shrine

Cao Dai Oratory

Thao Duong Thien Tu pagoda

Impact 1 Small and simple structures with total area under 6m2. There are no people living inside, some living near these shrine carry out the cleaning and incense. These small buildings are served for religious belief of the local communities and travellers, so they are not under any management

Dito

No land acquisition involved. On1 y environmental impacts during construction but could

be mitigated Partly affected (300 m2), converting into a 8-floor building

No adverse effect if apply mitigation

NO effect I

No adverse effect if apply mitigation



Cultural site

Thien Truoc pagoda

4.3. IMPACT ASSESSMENT IN CONSTRUCTION PHASE

6

43.1. Impacts on Air Quality

Impact No land acquisition involved but could be environmental

During construction phase, air quality in project area can be influenced by:

Impact level

No effect

Hanh Nguyen pagoda

(1) Fugitive dust and exhausted gases from trucks;

(2) Fugitive dust and exhausted gases from bargeltruck for dredged material disposal activity;

impacts during construction No land acquisition involved

but could be marginal environmental impacts during

construction

(3) Odour compounds fiom dredged material.

No effect

43.1.1. Air pollution due to fugitive dust construction vehicles

Vehicles are used to transport construction materials into construction site and construction waste, demolishment waste out to disposal with total volume of 139,600 tons (see Table 4.5). This process will generate particulate matter and carbon monoxide (CO), oxides of nitrogen (NO,), sulhr dioxide (SOz), and volatile organic compounds (VOCs).

Table 4.5 - Volume of construction materials, construction and demolishment waste

I No. I Kind of materiahaste I Volume (tons) 1 1

2

A common approach to estimating emissions fiom unloading of construction materials and loading of construction wastes by trucks is to follow the approach in AP.42 (USEPA, 1998), that provides an emission factor equation for a continuous loading operation as follows:

3

k = 0.74 for particle less than 30 micrometres

Construction materials

Construction waste

U = mean wind speed in ( d s ) , chose in Table 3.4 (use data recorded by Tan Son Nhat meteorological station in HCM city in 2006).

70,000

3,600

Demolishment waste

Total

M = material moisture content (%), chose M = 20%.

66,000

1 39,600

Volume of construction materials is about 70,000 tons, construction duration lasts about 26 months and construction materials supplying time will take 6 months, so volume of construction materials transported by truck in a day is about 390 tonslday. Similar to unloading

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (FKKPMU) 64 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


construction material, loading of particulate matter emission fiom truck loading can be calculated by the volume of construction waste and demolishment waste that is 69,600 tons (about 386 tonslday).

Based on this formula and Table 4.5, loading of particulate matter emission is estimated as in Table 4.6. Used data of wind direction in this area, the impacted area can be determined in comparison of the truck loading/unloading point.

Table 4.6 - Loading of particulate matter emission from truck unloading of construction material and loading construction waste

Remarks:

Impacted area ~

2 2.8 6.45 2.52 2.49 SE 3 3.2 7.67 2.99 2.96 SE ------ 4 3.2 7.67 2.99 2.96 SE 5 2.7 6.1 5 2.40 2.37 S 6 3.1 7.36 2.87 2.84 SW 7 3.2 7.67 2.99 2.96 SW

Loading of fugitive particulate matter emission estimated above in construction phase is high. This is because the time is so long.

Wind direction

8 9 10 11 12

These impad should be noticeable in dry season Cfrom November to April next year) and i q a d e d receptors along 2 canal bank in S, NW, SW area from the working site should be concerned

Month

43.12. Exhausted gases and fugitive dust from vehicles

Emission factor

Win Speed

Source: CEECO, 2009.

3.3 2.9 2.5 2.3 2.3

As mentioned above, vehicles used to transport construction materials into construction site and construction waste, demolishment waste out to disposal. Estimated time and vehicles trip are summarised in Table 4.7.

(m/s) , (gtton)

Emission load (Kglday)

7.9 8 6.75 5.57 4.99 4.99

Unloading of construction

materials

Table 4.7 - Transport of construction materials, construction and demolishment waste



Loading construction waste

3.1 1 2.63 2.17 1.95 1.95

No.

1

2 Construction waste, demolishment waste 1 69,600 1

3.08 2.61 2.15 1.93 1.93

Kind of materiavwaste

Construction materials

WSW W W N N

Volume (tons)

----- 70,000

ENE E E S S

Estimated Vehicle trip transport per day

time (tripslday) (months)

6 48 48 4 8


With above data, air pollutants can be evaluated as in Table 4.9 based on emission factors in Table 4.8.

Table 4.8 - Emission factors from vehicles

Unit:

Without loading 61 l* 10" With loading 1 190*103 786*10" Source: GEMIS V.4.1

Table 4.9 - Emission loading from vehicles

(glday) v m s 1 Dust SO2 NO2 CO VOC

without loading With loading

43.1.3. Air pollution due to exhausted gases from barges and trucks used in process of disposal of dredged material

There are some intended options for choosing route of sludge transport which option chosen depends on the specific condition, but any option related to transport by barge is qualified because shipping by barge is, in general, more energy efficient, safer, little congestion-causing, little noise or air pollution-producing, and it has relatively small effects on land and community Dr. C. (Jake Haulk. 1998; ht tp: / /m.caria .or@watem facts.htm1). The detail of calculating for Air pollution due to exhausted gases fiom barges and trucks used in process of disposal of dredged material is presented in Annex 4.1. The final result is shown in Table 4.10a and 4.10b.

58.0 113.1

Total:

Table 4.10a - Number of transportation trip per day for alternative scenarios, calculated for 500-m3 barges and 5-m3 trucks

Source: CEECO, 2009. 130.0 171.1

55.3 74.7

Barge Barge with7 Truck with 8.5

with with with krnltrip with km/trip anda 13.3 anda

17km/trip 20km/trip transfer km/tri~ transfer 1

0.4

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUWMU) 66 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

0.2 0.3

Sludge (85,000 m3 in total)

255.8

By Water

Excavated materials (330,008 m3 in totaI)

86.7 48.5

169.2

by Land By Water

169.1

I Barge 1 1 Truck by Land

120.7

1 Barge I 1 Truck


Table 4.10b - Total emission loading from transport of dredged sludge and material to Da Phuoc solid waste treatment site fo; each scenario (glday)

Scenario 1: All dredged material and excavated material transported by barge (the transfer site inside project area) follows the waterway transportation route option 1 (Can Giuoc River to Da Phuoc Site).

Scenario Scenario 1 Scenario 2 Scenario 3 Scenario 4 Scenario 5 Scenario 6 Scenario 7 Scenario 8

Scenario 2: All dredged material and excavated material transported by barge (the transfer site inside project area) follows the waterway transportation route option 2 (Tau Hu Canal 3 Ong Lon canal 3 Rach Chieu Creek + Da Phuoc Site)

Hydrocarbons I Carbon Monoxide 1 Nitrogen Oxide

Scenario 3: 85,000m3 of sludge by barge follows the waterway transportation route option 1 and the 350.000m3 of excavated material transported by truck follows the land transportation route option 3 (transportation by land only).

Source: CEECO, 2009; Notes:

0,12 0,14 933 6,14 934 6,15 1 1,96 7,68

Scenario 4: 85,000m3 of sludge by barge follows the waterway transportation route option 1 and the 350.000m3 of excavated material transported by truck follows the land transportation route option 4 (transportation by land and by waterway combined)

Scenario 5: 85,000m3 of sludge by barge follows the waterway transportation route option 2 and the 350.000m3 of excavated material transported by truck follows the land transportation

0,37 0,43 33,36 21,47 33,37 21,48 4 1,86 26,87

route option 3.

1,lO 1,29

185,66 119,lO 185,70

1 1- 233,20 149,40 1

Scenario 6: 85,000m3 of sludge by barge follows the waterway transportation route option 2 and the 350.000m3 of excavated material transported by truck follows the land transportation route option 4.

Scenario 7: All dredged material and excavated material transported by truck follows the land transportation route option 3.

Scenario 8: All dredged material and excavated material transported by truck follows the land transportation route option 4.

Remark: Pollutants emission loading is smallest in Scenario 1, Scenario 2; and highest in Scenario 7; medium in Scenario 4, Scenario 6, Scenario 8. The difference in value between the smallest and the highest is significant.

In environmental viewpoint, sequence of choosing above Scenario in order of priority is 1,2,4,6 and 8

43.1.4. Air pollution caused by odour compounds from dredged material

Dredged material is mainly sediments coming from wastewater and surface runoff accumulated at the bottom of the canal. Such sludge contains many complex organic



compounds which are biologically degraded in anaerobic condition and release odorous compounds. Types of odorous compounds created by anaerobic decomposition include inorganic gases, mercaptans and other compounds such as organic acids, phenol, and p- cresol. .. Remark: During dredging process, odorous compounds can be released and cause nuisance odor problems in nearby community. This impact mainly occurs in Transfer Site (Lo Gom construction site), where dredged materials are gathered and prepared to water way transport for treatment.

43.2. Noise and vibration impacts during the construction phase

43.2.1. Noise Impact

In construction phase, noise is mainly generated fiom heavy equipments which can be defined as earth.moving equipment, such as excavating machinery like excavators, backhoes, and fiont loaders, as well as handling equipment like graders, pavers, rollers, and dump trucks. Noise levels at lm fiom heavy equipment range fiom about 72 to 97 dBA. Besides, operation of vehicles and stationary equipment such as pumps, power generators, and air compressors are noise sources. At 15 m fiom truck and dozer, noise level is about 88, 85 dBA respectively. Noise level at 15 m from stationary equipment is about 68 - 88 dBA. The detail calculation for noise impact assessment is presented in Annex 4.2. The final result is showed in Table 4.11.

Table 4.11 - Assessment of noise impact on sensitive sites

No.

1

3 I

-

Normal time: 7 1 - 92 -- 6 Center for Children 74 Medium

P

Historical site

Thien Phuoc pagoda

Technology 1 Normal time: 58 - 87 Pham VanChi 1 Peak time: 60 - 88

5

- 7 Cung Hy restaurant Peak time: 65 - 88 74 Medium

4

Range of existing noise level (dBA)

Peak time: 72 - 93 Normal time: 71 - 92

64

pagoda -- Phu Lam college

Minor Primary School ) Normal time: 58 - 87 Hanh Nguyen 1 Peak time: 65 - 88

) 8

Prediction of maximum noise level impacted (dBA)

75

Normal time: 63 - 86

1 10

1 Normal time: 63 - 86 -- Tri Duc School 1 72 Medium

Impact level

Medium

75

---.

Khuong Viet

11 Phuong Nam School , Peak time: 65 - 88

Normal time: 63 - 86 Acoustics Standard - Noise in public & residential 45 - 65 quarters - Noise limit as 1

Medium

1

Normal time: 63 - 86 I

Peak time: 65 - 88 75 --EzGF ~pa&ent Building Normal time: 63 - 86 Tan Phu School 1 Peak time: 65 - 88 -

75 1 Medium 1


- Medium

78 Significant

Environn~ental Impact Assessment Repolt: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gorn Canal

1 5949.1998)

Source:CEECO, 2009.

Remark: During construction time, all related activities operate in areas near the following location should be noticed: Tan Phu School, Dam Sen park, Thien Phuoc pagoda, College of Food Technology, Phu Lam college, Center for Children of District 6, Cung Hy restaurant, Khuong V i t Apartment Building, Tri Duc School. However, this impact does not make a big change in comparison with the status because existing noise level is not in the limited range of noise value required in T C W 5949.1998. Therefore, the impact of noise in construction has the level of Medium mainly.

43.2.2. Vibration Impact

Impact

Construction activity can result in varying degrees of ground vibration, depending on the equipment and methods employed. Operation of construction equipment causes ground vibrations that spread through the ground and diminish in strength with distance. Buildings founded on the soil in the vicinity of the construction site respond to these vibrations, with varying results ranging fiom no perceptible effects at the lowest levels, low rumbling sounds and perceptible vibrations at moderate levels, and slight damage at the highest levels.

Prediction of maximum

Construction vibration should be assessed quantitatively in cases where there is significant potential for impact fiom construction activities. Such activities include blasting, pile-driving, vibratory compaction, demolition, and drilling or excavation in close proximity to sensitive structures.

noise level (dBA) Range of existing No.

The Annex 4.3 will show the used procedure to assess the impact of vibration.

Historical site

Remark: Refr to the Annex 4.3, for this project, all sensitive sites are classif~d into Category 1 and 2. The followings which should considered carefully in construction phase are College of Food Technology, Pham Van Chi Primary School, Hanh Nguyen pagoda, Phu Lam college, Center for children of District 6, Khuong Wet Apartment Building, Tan Phu School, Phuong Nam School, Tri DUC SchooL

permitted (TCVN noise level impacted (dBA)

43.3. Impacts on surface water quality

level

43.3.1. Impacts on snrface water quality caused by dredging activity

Dredging process makes canal bottom damaged, the fact that sediment and topsoil will be removed causes water body in dredging site disordered instantaneously and strongly. Pollutant concentration in water may increase because the pollutants are released fiom sludge. Other reason for increase in pollutant content is over flow created fiom fiee water in dredged material. This impact may be significant to open water body and even water boy if it is used to supply water for domestic, industrial purpose or aquaculture, or its aqua-ecosystems has high diversity. For this project, this impact is negligible because of the following reasons:

Tan Hoa - Lo Gom is semi-enclosed, it has the intersection with Tau Hu canal at lower section, and its width is smaller with distance near upper section. This canal receives is too polluted because it receives municipal wastewater in this basin. Water fiom this canal is not used for any purpose except receiving wastewater and using for transportation of small barges and boats in lower section.


Emironmental Impact Asrlcssment Repo* VietNam Urban Upgrading Pmject - Ho Chi Minh SubProject Sectorial Proiect No.4: Immvem& of Canal a d Roads Alom Tan Hoa - Lo Gom Canal

Thus, dredging activities has mainly impact on quality of Tan Hoa - Lo Gom surface water, but this impact is negligible and not noticeable because of reasons mentioned aboved. These activities in the section of KMO.00 . KM 1 +401.45, however, may impact on water boy of Tau Hu canal in the ebb-tide and in case of no applied mitigation measures (the most disadvantageous case). Therefore, assessing the level of increase in pollutant concentration in the section of KMO.00 . KM1+401.45 of Tan Hoa - Lo Gom canal on water quality of Tau Hu is necessary (Figure 4.1). Dredge Re-suspension and Contaminant Transport Model - Version 1.0 developed by Department of Civil and Environmental Engineering - University of Utah - USA is used to predict the increase and spread of pollutants in the area. Condition applied for this model is the most disadvantageous: Concentration of pollutants chosen 6om the data presented in Chapter 3 is highest; dredging time is on the strong ebb-tide; and no mitigation measures carried out.

Figure 4.1 - Dredging activities in the lower section of Tan Hoa - Lo Gom may impact on water quality of Tau Hu canal

Results: The detail results of the simulation are presented in Annex 4.4. The final results are as below:

Increase in SS concenttation and its spread: At distance of 5 - 1Om 6om dredging location, SS concentration rises by 1,2 - 1,4 m a , but at 80 m and more, its increase is insignificant, about <0,2 mg/L Increase in Fluorene concentration and its spread: At distance of < 20 m fiom dredging location, Fluorene concentration rises by > 7-10' mg/L, but at 80 m and more, its increase is insignificant, about ~2.10.' mg/L Increase in Phenanthrene concentration and its spread: At distance of < 20 m fiom dredging location, Phenanthrene concentration rises by > 8-10.' mg/L, but at 80 m and more, its increase is insignificant, about.2.10-' mg/L

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 70 5 Phung Khac Khoan, Dakao Ward, District I, HCMC.

Environmental Impact Assessment Report. VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

Increase in Fluoranthene concentration and its spread: At distance of < 20 m from dredging location, Fluoranthene concentration rises by > 2.10' m a , but at 80 m and more, its increase is insignificant, about < 0.5. 1 0.'. Increase in Pb concentration and its spread: At distance of < 20 m fiom dredging location, Pb concentration rises by > 0.30 m a , but at 80 m and more, its increase is insignificant, about <0.05 m a . Increase in Cu concentration and its spread: At distance of < 20 m from dredging location, Cu concentration rises by > 0.035 m a , but at 80 m and more, its increase is insignificant, about <0.01 m a . Increase in Ni concentration and its spread: At distance of < 20 m fiom dredging location, Ni concentration rises by > 0.020 m a , but at 90 m and more, its increase is insignificant, about <0.005 m a . Increase in Zn concentration and its spread: At distance of < 20 m fiom dredging location, Ni concentration rises by > 0.020 m a , but at 90 m and more, its increase is insignificant, about >0.005 m a .

Remarks: The concentration of pollutants released by dredging process in lower section of Tan Hoa - Lo Gom is not high, Pollutants spread with distance from dredging location under the @fed of ebb-tide flow, and its has the increased content in the section of <20 m distance from the dredging location. At distance of higher than 80 - 90 m, the increase is negligible. Thus, the water quality of Tau Hu canal may be impacted in the section of G O m distance from the dredging location, but the impact is slight because water in Tau Hu canal is too polluted However, the mitigation measures approved in Chapter 5 should be applied to prevent its pollution status worn

43.3.2. Impacts caused by transport and disposal of dredged materials

During transport of dredged materials, surface water quality of canaVriver included Lo Gom canal, Doi canal, Ong Lon canal, Rach Chieu creek, Tau Hu canal, Can Giuoc River where barge goes over may be slightly contaminated because the following reasons: (1) Possibly leakage of dredged materials fiom barge into the rivers if there are not managed properly, (2) Illegal disposal of dredged materials, (3) Risk of shrinking barge because of accidents.

Possibly leakage of dredged materials from barge into the rivers

Transport dredged materials on riverslcanal often has risk of leakage and overflow into river because powerhl waves (especially waves arisen when other carriage passing by barge in the river) and heavy rain. The level of the incident depends on draft and the volume of sludge carried by barge. If the volume of sludge flow into river is limited under control, we can control the number of sludge flowing out due to waves and so the environmental impact is not significant. On the other hand, the volume of sludge flowing out in case of overloaded barge is a countable, and the impact becomes more serious and it is in high possibility of barges shrinking.

Illegal disposal of dredged materials

For the project, the site for disposal of dredged materials is specifically defined, the routes for transporting of dredged materials are proposed as well. However, illegal disposal may happen because barge-owners may have lack of awareness (they may not intentionally comply with the approved requirements. This may have two cases: + Case 1 : Dredged materials are disposed in wrong site (not in the plan);




+ Case 2: Dredged materials are directly disposed into canalslrivers, especial areas remote fiom residential area such as Can Giuoc river.

The first case hardly happens because disposal of sludge needs pump system or clamshell on barges. Moreover, the fact that a large volume of dredged materials is disposed into an open area will make nearby residents noticed. Therefore, this almost does not happen. The second case is possible. If canalslrivers have high flow and wide cross-section, disposal of dredged materials into water body is hardly detected. In this case, this has the impacts as follows: + Dredged materials will settle and cause the depth of canalslrivers lower,

consequently, bargeslshipsllarge boats may be caught in a shoal, waterway traffic jams may happens.

+ Suspended solid concentration, chrominance and turbidity may increase. Too high may cause some fish species died because their gills are obstructed. High urbidity may make water temperature increased because water absorbs solar radiation more.

+ High concentration of organic compound contained in dredged materials will be discomposed and dissolved oxygen (DO) in water body will drop. Low DO will cause dead to some sensitive species, the biodiversity in the hydrological zone will be decrease. Besides, high concentration of compounds contained N, P, K... will contribute to eutrophication, consequently, the water body may become "dead".

+ Furthermore, a part of heavy metal ions and other toxic compounds such as PCB, PAH. ..., if direct disposal into canalslrivers, will settle sludge, the rest will dissolve into water. This will cause their concentration in sediment increased and make harm to benthic animals. The impact is significant in areas have aquaculture activities, so sludge disposal management must be planned and followed strictly.

Risk of sinking of sludge barges

The transportation of sludge by barges and tug boat can also result to their sinking, especially when these barges ship on some important routes which are very crowded such as Tau Hu, Ong Lon, Can Giuoc River ...( including heavy carriage). Besides the nature wave impacts (tidal dependence, wind, current...), it is important to take in to account the waves caused by big vessel moving on the way, which is when the waves are large increasing the danger of barge shrinking. Moreover, net weight of sludge barges should be paid special attention as it is a subjective reason to cause these incidents for the transportation means. If the risk happens, the property, even human life, will be lost, and environmental impacts like in case of "lllegal disposal of dredged materials" also become true. It is easy to see that the first impact is to make waterway on canalslrivers obstructed if reflex printing method is not applied on time.

43.3.3. Impacts caused by domestic waste from construction camp

a) Domestic wastewater

Domestic wastewater comes from daily domestic activities of construction worker in project site. Its components mainly include the followings:

Suspended solid (SS); Organic compounds (COD, BOD); Nutrient (N, P.. .); Microorganism (virus, bacteria, fungi.. .).


Edronmentnl Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

Construction workers are relatively 50 persons. If they are allowed to take bath in project site and the rate of using water is about 80 Llpersodday, volume of domestic wastewater is about 4m3/day. If no mitigation measure is applied, pollution loading is about 12 kgCOD/day (maximum emission factor is about 80gCODlpersodday).

b) Domestic solid waste

If meal preparation for construction workers is allowable in project site, and maximum emission factor is about 0,20 kglpersodday, total volume of domestic solid waste is about 10 kglday, in there, organic compound (only for food waste) is about 60 - 70%, i.e. 6 - 7 kglday. Other components are can, tin, wrapping for food.. . Without proper control measures, domestic solid waste can cause pollution for surface water, soil and aquatic ecosystem. This impact will be controlled and minimized by applying the mitigation measures in Chapter 5.

43.3.4. Waste oil from machines and transport maintenance process

According to Decision No. 2312006lQD.BTNMT and Circular No. 12/2006/TT.BTNMT, waste oil is classified into hazardous waste (Code: A3020; Basel code: Y8). The generation of waste oil from maintaining process for construction vehicle, machinery and equipment is avoidable. Generated waste oil depends on the following factors:

+ Number of construction vehicle, machinery and equipment;

+ The waste oil volume use for specific type of vehicle, machinery and equipment;

+ The frequency of changing oil. The practical investigation results in HCM city shows (Source: The research for regenerating waste oil to liquidj%el. Military Science - Technology - Engineering Center, 2002):

+ The waste oil volume generated by equipment and machineries is 7 liters per oil changing time.

+ The oil changing frequency: one time every 3 months. This data is used to calculate volume of waste oil from construction site is about 12 - 23 Llday. This impact will be controlled and minimized by applying the mitigation measures in Chapter 5.

43.4. Impacts caused by dredged and excavated materials

a) Volume of dredged excavated materials The volume of dredged material had been calculated in the Final Design by the LBG consultant and the results are presented in Annex 4.5 and the total is 4 15,134 m3. The dredged material includes:

(i) Contaminated sludge and solid waste at the surface of the canal bottom; (ii) Soil at the lower layer of canal bottom and canal bank.

The volume of contaminated sludge calculated in FS was 57.000m3. In this stage, based on the Final Design, it was calculated as presented in Annex 4.5. The result of contaminated sludge calculation is presented in Table 4.12.



The result of calculation as mentioned in Table 4.12 shows that the volume of contaminated sludge estimation is around 85,000m3 and the volume of excavated material is around 330,000m3.

Table 4.12 - Volumes of excavated material

b) Characteristics of contaminated sludge Reference on the sludge analysis (over 60 samples were taken) in the FS stage (2002), the characteristics of contaminated sludge analysed in 2009 is presented in Table 4.13.

Notes

Open canal Open canal Open canal Open canal Box Culvert Box Culvert

7

Table 4.13 - Characteristics of contaminated sludge analysed in 2009 Reference:

Length (m)

1401.45 889.01 1038.94 1024.39

933 1567.57 685436

Package No

1 2 3 4 5 6

Excavated material

Sampling locations EPA-Victoria

Source: FS 2003; CECOO 2009 and EPA - Victoria - Australia . Publication 448 . Classification of Wastes - 7.2007 Notes: Category D - Disposal as fill material

Category C - Disposal to licensed landfill According to the assessment, the contaminated sludge (dredged canal bed materials) is higher than the Category D but still meet the limited values for disposal in landfill. So the contaminated sludge should be treated as below:

Disposed to licensed landfill, Transported certificate system must be used,

(Maximum contaminant concentrations allowed in soil to be disposed of as Category C and D, referred fiom Annex 4.6). Furthermore, process of disposal of dredged materials may cause air pollution, soil pollution, surface water pollution, and underground water pollution in case of using unsuitable control measures. The mitigation measures for these impacts will be mentioned in Chapter Five.

Total:

Soil (m

49,223 70,615 73,444 46,548 35,338 55,023

330,562

Total (m

94,630 80,839 85,392 53,514 40,563 60,196 ------

415,134

Station


Sludge (m

45,407 10,224 1 1,948 6,966 5,225 5,173 84,943

From Km

0.00 140 1.45 2290.46 3329.40 4353.79 5286.79

To Km

1401.45 2290.46 3329.40 4353.79 5286.79 6854.36


43.5. Impacts caused by solid waste

43.5.1. House demolishment waste

Volume of house demolishment waste is about 66,000 tons. Such waste can be used for leveling purposes.

43.52. Construction waste

Construction waste consists of cement packing, metal waste, brick, stone.. . with released volume of about 3,600 tons. More than 95 - 99% of such wastes are reused or recycled.

43.6. Impacts on transportation system

Activities of transporting equipments, construction material, dredged materials, demolishment waste.. . may cause great impacts on transportation system, especially traffic jams. Table 4.14 describes the assessment of its impact.

Table 4.14 - Assessment of traffic congestion possible caused by the project in construction phase

+

+



Ben Lo Gom - Thap Muoi Boulevard intersection Ben Lo Gom - Hong Bang Boulevard intersect ion

Medium

3.2 +

High

High

2. Sub-section 2: from Rach Ong Buong bridge to the begin of Kenh Tan Hoa road

Main intersection Kenh Tan Hoa - Huynh Thien Loc intersection

Minor

High

Medium Medium

2.1 + +

2.2 + + + Tan Hoa Bridge Medium

3. Sub-section 3: from Tan Hoa Road to Au Co Road 3.1 Road

+ Kenh Tan Hoa road (both sides) Medium

Road Canal side road Crossing Road: Hoa Binh Road, Trinh Dinh Thao road, Trinh Dinh Trong Road Bridge Hoa Binh Bridge Trinh Dinh Thao Bridge

Environmental I m ~ a c t Assessment Report: - - . - - - - - . - . . - - VietNam Urban upgrading Project - ~ o k h i Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gom Canal

No. 1 Location + I Kenh Tan Hoa - Thoai Ngoc Hau


43.7. Impacts on cultural and social environment

Possibility of traffic congestion

Medium 1

+ 3.3

+

Encroachment of cultural and historical area During construction phase, cultural and historical area can be influenced by noise, vibration.. . (See section 4.3.2.1. and 4.3.2.2 for more details). Conflicts between workers and workers, worker and local people During construction phase, common conflicts may appear between workers and workers, worker and local people. However, this impact is minor or negligible because there are maximally 50 workers, they are only in project site in the working time, and have not much opportunity to contact with local people.

Urban landscape and visual impact

intersection Kenh Tan Hoa - Au Co intersection Bridge 02 small bridge

In construction phase, origin landscape will be changed and not good-looking because of construction activities. Therefore, some visual impacts may occur such as highly visible erosion, bare earth, dredged materials ... These impacts are unavoidable, short- term.

Medium

Minor

In addition, a problem possibly happening in construction site is that local people with lacking awareness in environmental protection can throw solid wastes into open area near construction site.

Health and occupational safety Occupational accidents may happen in construction site because of the following reasons:

+ Objective reasons: hot weather or hard rainfall.

+ Subjective reasons: Construction workers are careless during working or do not follow occupational safety regulation.

Considering the importance of these impacts, we will build up a suitable and specific program of occupational safety prevention and treatment, and regularly monitor the worker's abidance.

43.8. Some hazards and risks related to construction activities

Some hazards and risks related to construction activities are (1) crack of nearby buildings caused by vibration, and (2) landslide and landslip along river bank.

Crack of nearby buildings caused by vibration: This risk only happens when such activities include blasting, pile-driving, vibratory compaction, demolition, and drilling or excavation in close proximity to sensitive structures. As mentioned in section 4.3.2.2. Vibration Impact, the followings which should considered carehlly in construction phase are College of Food Technology, Pham Van Chi Primary School, Hanh Nguyen pagoda, Phu Lam college, Center for children of District 6, Khuong Viet Apartment Building, Tan Phu School, Phuong Nam School, Tri Duc School. Landslide and landslip along river bank: These incidents may occurs if construction activities are carried out in wrong ways and not under control. However, this impact is negligible because it has no significant consequences.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HULIPMLT) 76 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

4.4. IMPACT ASSESSMENT IN OPERATION PHASE

4.4.1. Impacts on air quality and noise

After finished, traffic system in this area will be significantly improved, so the traffic density will be higher as well. This will cause concentration of air pollutants, and noise level higher. Furthermore, this project will minimize odor caused by wastewater fiom canal.

4.4.2. Impacts on TH-LG canal surface-water quality

4.4.2.1. Pollution caused by discharging wastewater

In the operation phase and for further future, the water quality of Tan Hoa - Lo Gom will be improved, however the water body can be re-polluted by the wastewater discharging fiom Tan Hoa - Lo Gom Basin, especially in dry weather. The wastewater collected comprises both domestic and industrial wastewater. The domestic wastewater is mainly effluent fiom septic tanks. Industrial wastewater is fiom industrial processes, which in THLG basin is mainly bleaching and dyeing, tanning, and food processing. About 90% of wastewater fiom existing industries is currently discharged without treatment. There are currently no other wastewater treatment facilities in the THLG Canal basin. The calculation of estimated wastewater flow and load is presented in Annex 4.7. The final estimated flow, load and pollutants concentration are shown in Table 4.15 and Table 4.16.

Table 4.15 - Total Wastewater flow (m3/day) and Loads &/day)

Table 4.16 - Estimated pollutants concentration

2008

Total wastewater loads and flows in alternative having CSO and WWTP The interceptor sewers of CSO are designed to carry the peak dry-weather flows which will then be discharged to a wastewater treatment plant. The interceptor sewers will not have sufficient capacity to convey wet weather flows, and it is therefore necessary to divert the excess diluted wastewater (resulting fiom storm water runoff) into the canal. Due to the operation of CSO system, the loads and flow in dry weather can be reduced in 90% and around 60% in wet weather. The loads and flows of wastewater in THLG Basin when having a CSO can be calculated in Table 4.17 and 4.1 8.

2008 I Predicted I TCVN 5945:2005 1

BOD (mdl) SS (mgll) Total N (mg/l) Total P (mdl)

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (EUUPMU) 77 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Without project 3 19.5 214.5 20.0 5.4

With project 319.6 214.7 19.9 5.3

year 2020 213.3 161.8 14.9 4 .O

C class 100 200 60 8

Envirnnmentnl Imoact Assessment Revort: ~~ -

VietNarn Urban up;ading Project hi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gorn Canal

Table 4.17 - Wastewater flows in case having CSO

Effect of CSO and WWTP on surface water quality of Lo Gom According to the Table 4.18 and 4.19, it shows that the wastewater loads and flows discharging to water body of THLG canal is reduced significantly when the CSO and WWTP built. In case CSO installed but WWTP will be built in near future, the water quality of Tan Hoa - Lo Gorn canal will be slightly improved in the upstream, however at downstream, water quality at CSO discharging area may be increased concentration of SS and BOD. So, it clears that: the water quality of Tan Hoa - Lo Gorn and Tau Hu Canal will just be significantly improved in case CSO and WWTP are invested together.

Table 4.18 - Total Wastewater Loads in case having CSO

4.4.22. Pollution caused by municipal solid waste

Year

2008 with project Predicted 2020

In case that community awareness in environmental protection is not improved, the problem of throwing municipal solid waste into the canal may happen in operational phase. This makes the canal more polluted. Therefore, public participation is inevitable components of such project as made clear in Chapter Five.

Total (m3/day)

169,560 244,906

Having CSO

Parameters

SS BOD5 Total N Total P

4.4.3. Impact on surface water quality of Tau Hu Canal

Dry weather (m3/day)

16956 24491

Predicted Year 2020 (kdday)

Tau Hu canal, in the lower area of Tan Hoa - Lo Gorn canal, receives municipal wastewater fi-om Tan Hoa - Lo Gorn basin. Tau Hu canal, at present, is in Water Environment Improvement Project invested by ODA funding of Japan. This project has finished wastewater treatment plan 1,500 m3/day (in period of trial operation) to treat municipal wastewater fi-om area of District 1, 3, 5 and 10 in Tau Hu canal basin, and the next work is to build drainage system and CSO system for area of District 4,6, 8 and 11 (year 2010). In phase 2, the project will improve the capacity of wastewater treatment plant up to 500,000 m3/day (year 2012). With the current working progress, Tau Hu - Ben Nghe Project is going to be finished in near time, and then the quality of Tau Hu - Ben Nghe canal will be improved significantly. However, wastewater fi-om Tan Hoa - Lo Gorn basin is not collected and treated by this project. Thus, SP.04 Improvement of Canal and Roads Along Tan Hoa - Lo Gorn Canal Project and the component projects will improve the drainage system in Tan Hoa - Lo Gom canal, and so the water body of Tau Hu Canal will be impacted by wastewater discharged from this system. To merely estimate the increase in pollutants in Tau Hu canal caused by

Wet weather (m3/day) 67824 97962

Total

52,249 39,614 3,653 979

2008 with project



Total

54,188 36,406 3382 907

Having CSO Having CSO Dry weather

5225 3961 3 65 9 8

Dry weather 5419 3641 33 8 9 1

Wet weather 20900 15 846 1461 3 92

Wet weather 2 1675 14562 1353 363

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gorn Canal

wastewater from Tan Hoa - Lo Gorn in case with or without wastewater treatment plant, we use the dilution model applying for BOD and SS as follows:

C = (Cl .Ql + C2.Q2)/(Q1 + Q2) Where:

+ C1: Concentration of BOD and SS in water body of Tau Hu canal, chosen values are 49 mg/L and 99 mg/L respectively (these values are the averages referred fiom the result of monitoring water quality of Tau Hu canal fiom the East west Highway Project in 2008)

+ Q1: Flow of Tau Hu canal in dry season in low tide, 30m3/s

+ C2: Concentration of BOD and SS in water body of Tan Hoa - Lo Gorn canal, referred below.

+ Q2: Discharging flow fiom Tan Hoa - Lo Gorn basin, referred below. Based on current conditions and plan to invest WWTP for Tan Hoa - Lo Gorn basin, we provide 2 following scenarios which considered in 2 periods (2008 - 2009,2020:

+ Scenarios 1: 100% un-treated municipal wastewater in the basin is discharged into Tau Hu canal.

+ Scenarios 2: 10% un-treated municipal wastewater in the basin is discharged into Tau Hu canal (the rest will be treated by Tan Hoa - Lo Gorn WWTP, and then be discharged into the other canal).

There is currently no immediately plan for the construction of a WWTP for the Tan Hoa - Lo Gorn project, due to a lack of funding, although the master plan does call for its construction at some point in the future. The above indicates the impact on the receiving body considering with and without the Tan Hoa - Lo Gorn WWTP.

Table 4.19 - Discharged wastewater flow and its concentration from TH-LG basin

Table 4.20 - The result of predicting the increase of BOD and SS in water body of Tau Hu canal

Year

2008 - 2009

2020

Scenario

Scenario 1 Scenario 2 Scenario 1 Scenario 2

Year

2008 -

It is clear to see that the decrease of pollutant concentration of water body in Tau Hu canal is significantly when WWTP operates:

2009

2020

+ In 2008 - 2009, in case with WWTP, the concentration of BOD and SS will decrease by 16.59 - 1.76 = 14.83 mg/L and 7.10 - 0.75 = 6.35 m a , respectively.

Q (mfs)

1.96 0.196 2.83 0.283

Description

Scenario 1

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMCT) 79 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Sources: CEECO, 2009.

(Sc 1) Scenario 2(Sc2) Scenario 1 Scenario 2

Concentration (mgll) BOD 3 19.6 3 19.6 213.3 213.3

BOD ( m d )

49 49 49 49

S S 2 14.7 2 14.7 161.8 161.8

Baseline 1 SS (mgA)

65.60 50.76 63.17 50.54

Prediction Baseline Increase

16.59 1.76 14.16 1.54

Prediction Increase

99 99 99 99

106.10 99.75 1 04.4 1 99.59

7.10 0.75 5.41 0.59

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal and R o d s Along Tan Hoa -Lo Gom Canal

+ In 2020, in case with WWTP, the concentration of BOD and SS will decrease by 14.16 - 1.54 = 12.62 mglL and 5.4 1 - 0.59 = 4.82 mg&, respectively.

In conclusion, building and operating a complete WWTP in the future will be necessary to improve the quality of surface water in Tan Hoa - Lo Gom canal, Tan Hu canal, and other canals in HCM city as well.

4.4.4. Drainage and Flood Control - Operation Phase

The operation of the upgraded drainage system will generate positive impacts through reduced flooding to a large proportion of streets, households, and businesses in the poorer areas of the THLG basin. A population of 157,000 people representing 32,000 households will no longer be impacted annually by flood waters. Secondary benefits associated with reduced public health risk arising from these conditions are also expected to be observed

4.4.5. Impacts on cultural and social environment

4.4.5.1. Increase in traffic density

Traffic flow in areas of Distic 6, District 8, District 11, Tan Phu District will increase slightly and be divided because some citizeddrivers will choose route through project. The following routes will be impacted:

District 6: Hung Vuong + Hong Bang, and Hau Giang + Thap Muoi (Cho Lon);

District 8: Nguyen Duy, and Nhi Thien Duong Brighe

District 1 1 : Au Co - Lac Long Quan, Nguyen Thi Nho - Le Dai Hanh - Au Co - Binh Thoi, Lac Long Quan - Han Hai Nguyen, and 312 street . Han Hai Nguyen.

Tan Phu and Tan Binh District: Au Co street, Au Co - Luy Ban Bich, Au Co - Le Minh Xuan, Au Co - Pham Phu Thu, Au Co - Thoai Ngoc Hau, Au Co - Dong Ho, Au co - Truong Chinh, Luy Ban Bich - Hoa Binh, Luy Ban Bich - Thach Lam, and Luy Ban Bich - Thoai Ngoc Hau.

Consequently, traffic flow and density has minor increase, but its impact is negligible.

4.4.5.2. Increase in traffic accident

Traffic accident possibly happens because the following reason:

The increase of traffic flow and density;

Increase of vehicle's velocity;

Carelessness of driversllocal people.

Besides, referred from similar project in different scales, this project may have problem that roads may be encroached by some peddlers. Consequently, traffic activities can be disturbed; accidents have more probability to happen.

This impact will be mitigated by several measures proposed in Chapter Five.

4.4.53. Impacts on urban landscape

Finish and operation this project will improve landscape in this area which is currently disordered and unaesthetic, so this is positive impact.

4.4.6. Impacts on economic environment

Increase in land value in the area

After finish of the project, land value in this area will increase. More construction buildings will be appeared along the canal and nearby area.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (ECUUPMU) 80 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


Increase in economic activities in this area

Along with the improvement of sanitary condition for this area, economic activities will be more and more. This is a certain consequence.

However, the fact that roadway orland pavement may be encroached to do business should be considered in order to have suitable prevention mitigation measures.

Evaluation of economic efficiency in case with or without project

4.5. INTEGRATED IMPACT ASSESSMENT 4.5.1. Impact assessment integrated with other projects

a) Bad impacts

These impacts include the followings:

Households in area of THLH project and East-West Highway project will have adverse impacts caused by construction activities. Living quality in this area will be significantly influenced.

Under construction, water quality in Tau Hu canal can be heavy polluted.

The transportation of contaminated sludge on one route waterway route of THLG Project and Water Environment Improvement Project will increase the possibility of barges accident.

b) Positive Impacts In operation, water quality in Tau Hu canal can be significantly improved both by THLG Project and Water Environment Improvement Project.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HZnmMU) 8 1 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


When EWHW Project, Water Environment Improvement Project and THLG Project put into operation that will make the landscape and environmental quality at this area has a positive changes.

Operation of these projects will reduce flooding point in upstream of THLG Canal.

4.5.2. Impact assessment integrated with other component of the project

a) Bad impacts on people's living who reside both in SP.01 and SP.04 project areas

Besides benefits fiom the projects, a part of people may suffer bad impacts, especially with people who live both in SP.01 and SP.04 project areas. These impacts include the followings:

Households in project area are always in anxious fiom the day beginning the project,

Others not in project area of Project SP.01 also have anxiety because of hearing that Project Sp. 04 will continue to clear site.

Households in area of Project SP.01 whose houses are impacted may be influenced by Project SP.04.

Households in area of 2 component projects will have adverse impacts caused by construction activities. Living quality in this area will be significantly influenced.

b) Impacts caused by SP.01 wastewater flow and loads When the SP.01 and the SP.04 are put into operation, the density of population in the SP.01 site will increase and the new installed infrastructure 2&3 will discharge wastewater from SP.Ol's households into Tan Hoa - Lo Gom canal. That will reduce local pollution in the SP.01 area but the volume and load of wastewater can re-pollute the water quality of Tan Hoa - Lo Gom Canal. The flow and loads discharged fiom SP.01 area can be estimated by the number of beneficiaries (9,449 households, equivalent to 47,245 persons). The flow of waste water is 9,449m3/day, the pollutant loads and concentrations of wastewater are predicted as shown in Table 4.21. According to this result, the pollutants concentration in discharged wastewater fiom SPOl is nearly equal to the baseline. It seems that the pollutants concentration in water body of Tan Hoa - Lo Gom is not increased, but the loading. Therefore, collecting and treating such wastewater is really necessary.

Table 4.21 - Computation of loads and concentrations of pollutants in SP.01 wastewater

4.5.3. Impact assessment on alternative of the project

The assessment on alternative of the project has been already discussed in the Final EL4 report of HCMC Sub-project, dated March 2003. In this stage, Final Design stage of SP.04: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal , the assessment on alternative of the project can be discussed in three situations as: (i) Without

No.

01 02 03 04


Parameter

SS BOD5 T.N

, T.P

Coefficient (g/per./day)

ppppp

100 5 0 9

2.5

Load (kg/day)

4725 23 62 425 118 ,

Concentration Septic (mg/l)

500 25 0 45

12.5

305 175 26

7

206 200 30 5

100 5 0 5 0 10


Project; (ii) With Project and FS design; (iii) With Project and selected design option of Final Design stage.

The summary of design elements of FS design and selected design option are shown in Table 4.22. The impact assessment on alternative of the project is presented in Table 4.23.

Table 4.22 - The summary of design elements of FS design and selected design option

No. -

1

Design Elements

Description

Schematic Diagram

Similar Images

Flooding Condition

Options

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMZT) 8 3 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Feasibility Study Canal Section as per FS:

Cast In-situ Reinforced Concrete (CantileverISloped Type)

Retaining Wall on Wooden Piles

50 Flood Points

Selected Design Option

Vertical Canal Walls (Precast Concrete Sheet Piles)

18 Flood Points Volume: 50,3 10 m3

Time: 2 minutes

. I ,

'Envirohental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

Table 4.23 - The impact assessment on alternative of the project



Without Project

Positive impact: (0)+(1)+(2)+(3)+ The Best.

FS Design Selected design option of Consideration

18 Flood Points Volume: 50,3 10 m3 Time: 2 minutes Beauty in landscape - No bad odor fiom heavy polluted canal - Improved Housing - Suitable infrastructure - New road - Water quality of Tan Hoa -Lo Gom canal will be significantly improved. - Polluted solid waste will be removed

Around 2000 households will be affected Impacts on dust, noise, bad odor, wastewater . . . contaminated sludge volume is higher than FS - Risk of Contaminated Risk of Sludge spillage - Accident occurs in sludge transportation

final design Marks

3

2

2

3

-2

-2

-2

4

Factor

I. POSITIVE IMPACTS 1.1. Flood control

-

1.2. Landscape 1.3. Living condition

- -

1.4. Environmental quality

11. - NEGATIVE IMPACTS 2.1. Resettlement &Compensation

2.2 Environmental Impact

-

2.3 Environmental risk

Total: Notes: Negative impact:

Marks

1

1

2

2

- 1

- 1

- 1

3

Consideration

Many flood points when hard rain or high tide

Low income area picture

- Bad odor fiom heavy polluted canal - Inadequate Housing - Inadequate infrastructure

- Water quality of Tan Hoa - Lo Gom canal is seriously polluted. - Polluted by solid waste

No Resettlement and Compensation

No

No

(0)+(.1)+(.2)+(.3)+ The Worst.

Marks

0

0

0

O

0

O

0

Consideration

50 flood points

Better in landscape - No bad odor fiom heavy polluted canal - Improved Housing - Suitable infrastructure - New road - Water quality of Tan Hoa -Lo Gom canal will be improved. - Polluted solid waste will be removed

Around 1000 households will be affected

Impacts on dust, noise, bad odor, wastewater.. . contaminated sludge

- Risk of Contaminated Sludge spillage - Risk of Accident occurs in sludge transportation

, I

'~nvironmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal and Roads Along TanHoa - Lo Gom Canal

4.5.4. Impact assessment on alternative of the Sectoral Project No.4 and CSO&WWTP

The assessment on alternative of Sectoral Project No.4 and CSO&WWTP can be discussed in three situations as: (i) Sectoral Project No.4 without CSO&WWTP; (ii) Sectoral Project No.4 with CSO and without WWTP; (iii) Sectoral Project No.4 with CSO and with WWTP. The impact assessment on alternative of the project is presented in Table 4.24.

Table 4.24 - Assessment on alternative of with and with down CSONWTP

I. DESIGN PHASE

Factor -

- Canal improvement - Road - Landscape

- Canal improvement - Road - Landscape - CSO system

Sectoral Project Na4 Without CSO&WWTP (Alt.1)

- Embankment protection

m r a l Project No.4 With CSO and with I Sectoral Project No.4 With CSO and without WWTP (Alt.2)

- Embankment protection -WWTP (~lt .3) '

1 - Embankment protection - Canal improvement - Road - Landscape - CSO system - Terminal pumping station

I Note the project does not include construction of the Tan Hoa - Loa Gom canal Waste Water Treatment Plant at this time. The city will seek hnding as available.

11. CONSTRUCTION PHASE

111. OPERATION PHASE



Impacts on dust, noise, bad odor, contaminated sludge, excavated material.

- Water quality of Tan Hoa - Lo Gom canal will be improved.

-Tau Hu - Ben Nghe canal has not improvement on water quality.

- Annual sludge volume will be high

Impacts on dust, noise, bad odor, contaminated sludge and Excavated material will higher than Alt.01

- Water quality of Tan Hoa - Lo Gom canal will be significantly improved in the upstream, however at downstream, water quality at CSO discharging area there may be increased concentration of SS and BOD. -Tau Hu - Ben Nghe canal has no improvement on water quality. - Annual sludge volume will be decreased at upstream however will be increased at downstream. In general, however, the total will be lower than Alt. 01 caused by the

- wastewater treatment Plant Impacts on dust, noise, bad odor, wastewater, contaminated sludge Excavated material will higher than Alt.0 1 & Alt.02.

- Water quality of Tan Hoa - Lo Gom canal will be significantly improved due to over 90% of wastewater loads and flow will be pumped and treated in WWTP in dry weather. - Water quality of Tau Hu - Ben Nghe canal will be significantly improved due to the decreasing of pollutants concentration. - Annual sludge volume will be significantly decreased due to the operation of WWTP.

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gom Canal

4.6. ENVIRONMENT IMPACT ASSESSMENT USING RIAM MODEL

RIAM (Rapid Impact Assessment Matrix) is used to carry out integrated impact assessment for the project. It is a powerful Impact Assessment system that organises and analyses the components selected by the scooping of any holistic environmental impact assessment. The RIAM method provides a completely transparent record of the judgments made in the process, coupled with a fast analysis system and results that can be simply presented. It can be used for a wide range of Impact Assessments at different levels of decision making and planning. RIAM has successfully been used for Initial Environmental Evaluation (IEE) and Environmental Impact Assessment (ETA), as well for Strategic Environmental Assessment (SEA) and Regional Environmental & Social Assessment (RESA). RIAM may be adapted for use in Sustainability Appraisal (SA), evaluation of performance and for programme/project prioritisation. The detail RIAM for SP.04 is presented in Annex 4.7. The results are shown in Figure 4 3 and Figure 4.4

Figure 4.3 - Graph of result of applying RIAM on each environmental components for the project

PhysicaVChemical component (PC) Biological/Ecologica1 (BE) PC BE

SociologicaVCultura1 (SC) Economic/Operational (EO)


Environmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom Canal

Figure 4.4 - Graph of result of applying RLAM on each environmental components for the project

Remarks: In general, the project has most impacts in the level of -B (Negative Changenmpact) The following impacts should be specially concerned in order to have effective and feasible mitigation measures: + In design and pre-construction phase:

o Encroachment on residential land o Encroachment on historical/ cultural areas o Encroachment on technical facilities along the existing roads o Compensation and resettlement

+ In construction phase: o Dredging process, transport and disposal of dredged material. o Demolishment waste in construction phase o Air pollution due to fugitive dust and exhausted gases fiom trucks. o Impact of noise pollution. o Impact of vibration. o Waste oil fiom maintenance process. o Domestic solid waste and wastewater.

+ In operation phase: o Air pollution and noise pollution due to fugitive dust and exhausted gases in

operation phase o Increase in surface-water pollution and sedimentation in operation phase.

The mitigafrion will be proposedfor each impact in all phases of implementing project.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HZTCTPMU) 8 7 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


CHAPTER FIVE MITIGATION MEAS-S FOR NEGATIVE IMPACTS

This chapter will propose feasible and cost-effective measures to mitigate the negative impacts in design and pre.-construction phase, construction phase and operation phase, which are analyzed and assess in Chapter 4.

5.1. MITIGATION MEASURES IN DESIGN AND PRE-CONSTRUCTION PHASE 5.1 .l. Generic design instructions

Environmental matters have to be integrated in all the design work and planning of the project. The designing has to be done by minimizing the adverse impacts on environment using as much as possible existing facilities and selecting the location of new facilities in areas where the disturbance to environment, people and existing structures is the smallest.

According to the Vietnamese Construction Regulation Standard Article 3.3 Protection of Natural Resources and Environment, construction projects should:

Not cause adverse effect to environment, and technical regulations on scenery and environment protection should be observed Protect the natural preservation areas, and historical, cultural and architectural places

Respect traditional customs, practices, and religions of people living in and around the construction area. In Construction Regulation Standard, there are instructions especially for master plan including general instructions for designing sewerage and drainage system. Urban drainage system should be assured:

+ To discharge all types of urban waste water;

+ To have suitable solution for treating wastewater so that the urban area is not flooded, and environment and water sources are not polluted.

In Standard Branch Sewerage and Drainage System and Works, Standard Designs there are more detailed design instructions. However, international design standards have to be introduced and used in design work.

The construction works should be implemented stepwise in order to minimize the moving/transferring of equipment as well as to avoid chaos for the surrounding communities.

5.1.2. Designing with community participation

Since the object of the projects are to alleviate poverty in urban areas, to improve the living and environment conditions of the low-income communities, and to help reorganize the city, to build and develop housing hnd that the urban poor are willing and able to pay for, etc., its design is based on community participation, for which the designing consultant and the investor have organized many sessions of community counsel for determination of the zones to be upgrade as well as upgrading alternatives.

Integration of community participation in design and pre-construction phase will reduces the . impacts on local people's living quality.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 8 8 5 Phung Khac Khoan, Dakao Ward, District I, HCMC.

Environmental Impact Assessment Report: VietNam Urban upgrading Project - ~ o ~ h i Minh Sub-project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gom Canal

5.1.3, Limitation in encroachment on land-use and cultural sites

In phase of project design, many households and some cultural sites will encroached partly or entirely. The impacts has been identified, analyzed and assessed as in Chapter 4. The encroached households and cultural sites will be compensated and have resettlement suitably according to current available law and regulation. In some cases, e.g. with religious sites, the PMU will discuss with the managers of the sites and local people to find suitable options for relocation.

As described in the previous chapters, Thao Duong Thien Tu pagoda is the biggest religious building, so it should receive the most concern when implementation of the project. At 2:00 PM on 24/3/2009, at Thao Duong Thien Tu pagoda, Ward 12, District 6 a meeting had happened between managers of Thao Duong Thien Tu pagoda and PMU and Local Authority. The managers of pagoda agree with implementation of the project and accept to cede land to the project. The pagoda managers give 4 proposals:

Proposal 1: Adjust the design and minimize impacted land for the pagoda, only repossess land of pagoda land, not sanctum. Proposal 2: Repossess a part of pagoda land, and compensate the land of householders behind the pagoda Proposal 3: Move the pagoda wholly and provide other land to re-establish. Proposal 4: Rebuild the pagoda with 08 floors on the rest of land after repossessed (about 300 m2).

The most suitable proposal will be clear in the RAP report.

5.1.4. Compensation and resettlement program

After scales and design embodiments are determined with people's consent, the RAP complied with Vietnamese legislation and WB guidelines is prepared for the householders removed partially or fully land and/or houses. It will present detailed compensation and resettlement program. This section merely summarized main contents and other ideas in the viewpoint of environmental experts as follows:

Demands on resettlement: Total 1,35 1 households (with about 4,464 habitants) will be provided resettlement (see Table 5.1 ).

Table 5.1 - Comprehensive table of resettlement demands - -

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HCrLPIMZT) 89 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

No.

I 1 2 3 4 5 6 7 8

Project area

District No. 6 District No. 5 District No. 7 District No. 8 District No. 9 District No. 10 District No. 1 1 District No. 12 District No. 14

TOTAL

Displaced households

1.2 70 4

248 76 150 53

3 12 309 118

1,351

No.

I1 9

III 10 1 1 12

Project area

District No. 11 District No. 3

Tan Phu District Hoa Thanh ward Tan Thoi Hoa ward Phu Trung ward

Displaced households

5 1 5 1

30 4 10 16


Resettlement sources: It now includes 3 areas: ; (i) Vinh Loc B Resettlement area and (ii) Resettlement site at 243 Tan Hoa Dong (located in Ward No. 14, district No. 6), and (iii) resettlement site in Ward No. 1 1, District No. 6.

+ Vinh Loc B Resettlement area: It is is located in Vinh Loc B commune, Binh Chanh ward (formerly), comprises Houses (2.024 apartments, 53 1 ground) and Public utilities (01 primary school, 04 kindergartens, 01 administrative base, 01 general surgery, Market and bus station, and Green tree park - sports - water area).

+ Resettlement Site in No. 243 Tan Hoa Dong, ward No. 14, District No. 6: Its area is 10,976.9 m2 includes three buildings with 656 apartments, 18 - 21 floors, and enough infrastructures such as traffic system, power supply system, water supply system, drainage system, etc.

+ Resettlement area in ward No.11, District No. 6: This resettlement site is in progress of construction. Has two blocks including 15 floors with amount of 336 flat and 224 flat in turn.

5.1.5. Control of pollution due to site preparation

Partially or wholly removal of houses will affect the local air environment and noise but the impact is medium and controllable by means of measures as follows:

Monitoring and reminding people to cover up removal and construction sites. The subcontractor being required by the investor to cooperate and provide supports such as means for transporting spoil out of people's removal sites. Watering roads in the period when people remove parts of their houses.

5.2. MITIGATION MEASURES PROPOSED IN CONSTRUCTION PHASE

5.2.1. Air pollution control measures

An inevitable impact of infrastructure upgrading projects is air pollution in the construction phase. The following mitigation measures for the sake of controlling~minirnizing the impact of dust and air pollutants in the construction phase are applied as follows:

Open construction sites as well as heaps of materials pending for use or transport should be watered regularly. Heaps of construction materials like cement should be covered up to limit dust. Movable iron sheet walls (for roll.up construction) of at least 2 m height should be use to avoid of dust emission and to prevent accidents due to children. The zones used to gather construction materiaIs and machines should be managed strictly. Drips and drops of materials should be avoided. Temporary warehouses (if required) should be built and covered up and isolated with fences. Any vehicle transporting materials and spoil to and from construction sites should be covered up. Overloaded vehicles should be prohibited. All the vehicles that serve the project should bear the logo of the project and abide by all traffic rules with no operation in rush hours. The speed of vehicles in the site, nearby alleys should be limited at 5km per hour and the limit speed in urban areas should be 30km per hour. All vehicles should be washed (if possible) before leaving construction sites.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMLT) 90 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


All vehicles and machines should receive proper maintenance. Vehicles, trucks, construction equipment used in this project should be checked in their noise, vibration, and air emission levels to meet the Vietnamese Standards (TCVN.1995). This is a condition in the tender given by PMU. All machines and vehicles used in construction sites should strictly abide by safety regulations set forth by Ho Chi Minh City Service of Transport and Public Works.

8 Use of machines that use low standard fuel should be restricted so as to mitigate the impacts that may pollute the environment. Construction machines with low emissions should be employed to reduce emission. Sources of emission should be arranged far fiom people's houses. All construction machines and vehicles should meet the standard on emissions (TCVN 6438:2001) and all industrial machines should meet the same standards applicable to equipment (TCVN 5939:2005, TCVN 5940:2005). Burning waste materials in-site is not permitted.

Concrete mixing plants and asphalt plants should be located over lOOm fiom boundary concentrated residential sites. If air emission (dust, S04, N02, VOC) fiom the asphalt plants will exceed the Vietnamese Standard for Air Emission (TCVN.5939.2005), it will be necessary to install the effective emission control equipment.

Exhaust from construction equipment (vehicles, trucks, bulldozers etc.) and air emission fiom asphalt plants should be monitored based on the Vietnamese Environmental Standards for Transport, to control air pollution caused by particulate matters, S02, NOx, CO, hydrocarbon and lead During the dry days, periodically watering construction sites is necessary for dust control. These measures should be used at the construction sites in urban areas or areas nearby schools, hospitals, and religious and historical sites.

All the measures for mitigating air and dust pollution as recommended above will be obliged in the detailed technical documents of the project and also the obligatory technical standards that subcontractors should comply with.

5.22. Control Noise and vibration

5.2.2.1. Noise

Many activities of the project will produce noise, for instance, operation of vehicles and construction machines (hammer machines, drilling, cutting and digging machines, etc.; and generators, etc) as assed in Chapter 4. In order to mitigate impacts of noise, the project should strictly consider and apply three categories of noise control approaches given below:

Design considerations and project layout: + Construct noise barriers, such as temporary walls or piles of excavated material,

between noisy activities and noise-sensitive receivers.

+ Re-route truck traffic away from residential streets, if possible. Select streets with fewest homes if no alternatives are available.

+ Site equipment on the construction lot as far away fiom noise-sensitive sites as possible. The followings are the receptors should be concerned: Thien Phuoc pagoda, College of Food Technology, Pham Van Chi Primary School, Hanh Nguyen pagoda,



Phu Lam college, Center for Children of District 6, Cung Hy restaurant, Khuong Viet Apartment Building, Tan Phu School, Phuong Nam School, Tri Duc School, Dam Sen park.

+ Construct walled enclosures around especially noisy activities or clusters of noisy equipment. For example, shields can be used around pavement breakers and loaded vinyl curtains can be draped under elevated structures.

Sequence of operations: + Combine noisy operations to occur in the same time period. The total noise level

produced will not be significantly greater than the level produced if the operations were performed separately.

+ Avoid nighttime activities. Sensitivity to noise increases during the nighttime hours in residential neighborhoods. Noisy machines should be operated in daytime. Any nighttime activities should be done using noise-reducing means or low-noise technologies.

Alternative construction methods:

+ Avoid use of an impact pile driver where possible in noise-sensitive areas. Drilled piles or the use of a sonic or vibratory pile driver are quieter alternatives where the geological conditions permit their use.

+ Use specially-quieted equipment, such as quieted and enclosed air compressors and properly-working mufflers on all engines.

+ Select quieter demolition methods, where possible. For example, sawing bridge decks into sections that can be loaded onto trucks results in lower cumulative noise levels than impact demolition by pavement breakers.

In addition, it is a relatively large project, the information available during the preliminary engineering phase may not allow final decisions to be made on all specific mitigation measures, so it is appropriate to describe and commit to a mitigation plan that will be developed during final design. The objective of the plan should be to minimize construction noise using all reasonable (i.e., cost vs. benefit) and feasible (i.e., physically achievable) means available. Components of the plan may include some or all of the following provisions which would be specified in construction contracts:

Equipment noise emission limits: These are absolute noise limits applied to generic classes of equipment at a reference distance (typically 50 feet). The limits should be set no higher than what is reasonably achievable for well.-maintained equipment with effective mufflers. Lower limits that require source noise control may be appropriate for certain equipment when needed to minimize community noise impact, if reasonable and feasible. Provisions could also be included to require equipment noise certification testing prior to use on site.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUWMU) 92 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Imnact Assessment Report: VietNam Urban upirading Project - ~ o k h i Minh Sub-project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gom Canal

Table 5.2 - Example of Possible Construction Equipment Noise Emission Criteria Limits


Lm, Noise Limit at 50 ft, dB, slow

8 5

8 5

80

90

Equipment Description

Gradall

Grader

Horizontal Boring Hydraulic Jack

Hydra Break Ram

Impact Pile Driver (diesel


All other equipment > 5 HP

Auger Drill Rig

Backhoe

Bar Bender

L,, Noise Limit at 50 ft, dB, slow

8 5

8 5

80

8 0

Boring Jack Power Unit

Chain Saw

Clam Shovel

Compactor (ground)

Compressor (air)

Concrete Batch Plant

Concrete Mixer Truck

Concrete Pump

Concrete Saw

Crane (mobile or stationary)

Dozer

Dump Truck

Excavator

Flat Bed Truck

Front End Loader

80

8 5

9 3

8 0

8 0

8 3

85

82

90

8 5

85

84

8 5

84

80

In-situ Soil Sampling Rig

Jackhammer

Mounted Impact Hammer (hoe ram)

Paver

Pickup Truck

Pneumatic Tools

Pumps

Rock Drill

Scraper

Slurry Plant

Slurry Trenching Machine

Soil Mix Drill Rig

Tractor

Vacuum Street Sweeper

Vibratory Concrete Mixer

84

8 5

90

8 5

5 5

8 5

77

8 5

8 5

7 8

82

80

84

80

80


Source: Adapted from Central Artery/Tumel Noise Specification

Lot-line construction noise limits: These are noise limits that apply at the lot line of specific noise-sensitive properties. The limits are typically specified in terms of both noise exposure (usually Leq over a 20.30 minute period) and maximum noise level. They should be based on local noise ordinances, if applicable, as well as pre-construction baseline noise levels; limits that are 3.5 decibels above the baseline are often used.

L,, Noise Limit at 50 ft, dB, slow

95

73

Operational andlor equipment restrictions: It may be necessary to prohibit or restrict certain construction equipment and activities near residential areas during nighttime hours. This is particularly true for activities that generate tonal, impulsive or repetitive sounds, such as back-up alarms, hoe ram demolition and pile-driving.


Vibratory Pile Driver

Welder


Generator (25 KVA or less)

Generator (more than 25 KVA)

Noise standard: Noise generated from construction activities must meet Vietnamese authorized standards about engineering safety and environment, especially noise standards TCVN 5949:1998.

Lmu Noise Limit at 50 ft, dB, slow

70

82

Noise abatement requirements: In some cases specifications may be provided for particular noise control treatments, based on the results of the design analysis and/or prior commitments made to the public by civic authorities. An example would be the requirement for a temporary noise barrier to shield a particular community area from noisy construction activities. Noise monitoring plan requirements: Plans can be developed for pre-project noise monitoring to establish baseline noise levels at sensitive locations, as well as for periodic equipment and lot-line noise monitoring during the construction period. The plan should outline the measurement and reporting methods that will be used to demonstrate compliance with the project noise limits. Noise control plan requirements: For major construction projects, specifications have required the preparation and submission of noise control plans on a periodic basis (e.g., every six months). These plans should predict the construction noise at noise-sensitive receptor locations based on the proposed construction equipment and methods. If the analysis predicts that the specified noise limits will be exceeded, the plan should specify the mitigation measures that will be applied and should demonstrate the expected noise reductions these measures will achieve. The objective of this proactive approach is to minimize the likelihood of community noise complaints by ensuring that any necessary mitigation measures are included in the construction plans. Compliance enforcement program: If construction noise is a significant issue in the community, it is important that a program be put in place to monitor contractor compliance


Environmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gom Canal

with the noise control specifications and mitigation plan. It is best that this function be performed by a construction management team on behalf of the public agency. Public information and complaint response procedures: To maintain positive community relations, the public should be kept informed about the construction plans and efforts to minimize noise, and procedures should be established for prompt response and corrective action with regard to noise complaints during construction.

5.2.2.2. Vibration

Similar to the approach for construction noise, mitigation of construction vibration requires consideration of equipment location and processes, as follows:

Design considerations and project layout: + Route heavily-loaded trucks away fiom residential streets, if possible. Select streets

with fewest homes if no alternatives are available.

+ Operate earth-moving equipment on the construction lot as far away fiom vibration- sensitive sites as possible. The followings are the receptors should be concerned: Thien Truoc pagoda, College of Food Technology, Pham Van Chi Primary School, Hanh Nguyen pagoda, Phu Lam college, Center for Children of District 6, Cung Hy restaurant, Khuong Viet Apartment Building, Tan Phu School, Phuong Nam School, Tri Duc School, Dam Sen park.

Sequence of operations: + Phase demolition, earth-moving and ground-impacting operations so as not to occur in

the same time period. Unlike noise, the total vibration level produced could be significantly less when each vibration source operates separately.

+ Avoid nighttime activities. People are more aware of vibration in their homes during the nighttime hours.

Alternative construction methods: + Avoid impact pile-driving where possible in vibration-sensitive areas. Drilled piles or

the use of a sonic or vibratory pile driver causes lower vibration levels where the geological conditions permit their use (however, see cautionary note below).

+ Select demolition methods not involving impact, where possible. For example, sawing bridge decks into sections that can be loaded onto trucks results in lower vibration levels than impact demolition by pavement breakers, and milling generates lower vibration levels than excavation using clam shell or chisel drops.

+ Avoid vibratory rollers and packers near sensitive areas.

Similarly, it is appropriate to describe and commit to a mitigation plan that will be developed and implemented during the final design and construction phases of the project. The objective of the plan should be to minimize construction vibration damage using all reasonable and feasible means available. The plan should provide a procedure for establishing threshold and limiting vibration values for potentially affected structures based on an assessment of each structure's ability to withstand the loads and displacements due to construction vibrations. The plan should also include the development of a vibration monitoring plan during final design and the implementation of a compliance monitoring program during construction.




Above mitigation measures must be strictly concerned and applied in order to archive the final goal that vibration must meet Vietnamese Standard for vibration TCVN 6962:2001.

5.23. Mitigation measures for the impacts on surface water quality

5.23.1. Impacts caused by domestic waste from construction workers

To eliminate the negative impacts of domestic wastes, following measures will be implemented:

Do not allow construction workers to stay overnight in construction sites; Discharge and disposal of domestic wastes fiom construction camps into water sources must be avoided. During construction phase, install temporary toilets (mobile toilet) at the site, contract with local garbage collecting entities should be signed on periodically collection. This measure will be strictly applied at the construction sites in urban areas. For food hygiene control, cooking in the project site is not permitted. Not bury, burn domestic solid waste in the project site. Domestic solid wastes will be collected, transported into the city waste collecting sites. Solid waste collection and treatment can be implemented by the Urban Environmental Company through agreement with the Constructors.

5.2.3.2. Control waste oil from maintenance process

This is to prevent oil waste spills which possibly cause pollution and health problem for water body and community contacting directly or indirectly with spilt oil. The measures to be taken include:

Vehicles, pumps and equipment with significant oil leakage must be moved out of construction sites by means of specializing means and the spillage positions should be treated immediately. Vehicles, pumps and equipment must not be repaired in construction sites. In opposite, they should be transported to repair zones. In some special cases such as minor repair, temporary maintaining shop will be built in suitable location in project site, and have the collecting system of oil and lubricant waste. Oil and lubricant waste is not allowed to bury orland burn oil and lubricant waste in project site, but must be stored in proper oil-can, and collected and treated thanks to contract with local companies according to present regulation.

5.2.4. Mitigation measures for dredging activity

5.2.4.1. Management and regulation of dredging activities and dredged material

In design and pre-construction phase:

+ The PMU and chosen contractor must have enough information about the dredging activities and dredging including dredging area, volume and characteristic of sludgelmaterial, hydraulic characteristics of canals, equipments and labor demand, time schedule.. .

+ Identify characteristic of dredged material in each section on the canal by sampling and testing collected sample along the section of canal and in each layer of cross.section slide of canal, estimated exact volume of dredged materials.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HZnTPMU) 96 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


+ Chose suitable facilities and equipments. Selection of dredging equipment and method used to perform the dredging will depend on the following factors:

o Physical characteristics of material to be dredged.

o Quantities of material to be dredged.

o Dredging depth.

o Distance to disposal area.

o Physical environment of the dredging and disposal areas.

o Contamination level of sediments.

o Method of disposal.

o Production required.

o Type of dredges available.

0 Cost.

+ Make a plan for dredging based on analysis and selection of alternative options.

+ During environmental dredging, additional time must be allowed for other factors, such as:

o Greater precision of cut

o Slower production rates to minimize re-suspension

o Multiple passes needed to achieve cleanup goals

o Use of contaminant barriers

o Restrictions posed by other remedial components.

+ Design and chose suitable route for transport of dredged material.

+ Create an environmental management plan for dredging activities and disposal of dredged material.

+ Make a monitoring program for environmental during dredging, It should be designed to meet project-specific objectives. Monitoring can be used to evaluate the performance of the dredging contractor, equipment, and the barriers and environmental controls in use. Monitoring may also be integrated into the health and safety plan for the dredging operation to ensure that exposure threshold levels are not exceeded.

+ The monitoring program must be designed to provide information quickly so that appropriate changes to dredging operations or equipment can be made to correct any problems. Simple, direct, and preferably instantaneous measurements are most useful. Measurements of turbidity, conductivity, and dissolved oxygen can be used as real- time indicators of excessive sediment re-suspension. Project-specific guidelines for interpreting monitoring results should be developed in advance, as well as potential operational or equipment modifications.



In construction phase:

+ Dredging contract must include the Management and regulation of dredging activities and dredged material, in which environmental management plan is an obligatory component in the contract.

+ Choose the dredging contractor meeting the requirements.

+ The dredging contractor must commit to follow strictly the Management and regulation of dredging activities.

+ Monitoring during the dredging process, especially odorous compound released fiom the dredged activity and report regularly.

5.2.4.2. Mitigation measures for dredging

As assessed in Chapter 4, the impact of dredging on Tan Hoa - Lo Gom appeared to be not significant, but it should be concerned in the lower section where have the intersection with Tau Hu canal. Here are some mitigation measures to minimize these impacts:

Domestic solid wastes floating on the canal must be fished out and managed as requirement of Vietnamese solid waste management regulation.

Choosing time for dredging: For the project, the canal has the semi-enclosed water bodies, dredging only on the incoming tide may provide additional time for suspended sediments to settle, thus minimizing the dispersal of contaminated sediments out of the water body. These activities should be implemented in rainy season in HCM city, from the December to April next year.

Prevent overflow and spread of pollutants:

+ Free water in dredged material on barges should be drawn before barges move. For such extremely polluted canal like Tan Hoa - Lo Gom, Barge overflow may be acceptable, especially in case of using temporary dams to separate water body. In contrast, in the lower section of the canal where having water interaction with other canal, the shunting method can be applied if necessary. This method is the active pumping fiee water in a barge to bottom of the water column at the dredging site. It may act to reduce turbidity in the upper water column.

+ Other alternative option should be considered is that temporary dams are used to separate water in dredged area to others. This option is rather feasible because the canal is relatively narrow.

+ In area having the intersection with Tau Hu canal, silt screenlcurtains should be used to prevent spread of pollutants into water body outside (see Figure 5.1). Silt screenslsilt curtains are available to minimize sediment transfer throughout the body of water, and they are most effective in relatively shallow, quiescent water. These flexible barriers hang down from the water surface. Floats on the surface provide buoyancy. Ballast chain or anchors along the bottom provide stability. To be effective, barriers are deployed around the dredging operation and must remain in place until the operation is completed at that site (Sources: Assessment and Remediation of Contaminated Sediments Program.. FY93 Accomplishments [Fact Sheet]. 1993. Environmental Protection Agency/Great Lakes National Program Ofice. Chicago, Ill.,

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 98 5 Phung Khac Khoan, Dakao Ward, District I , HCMC.

Environmental Impact Assessment Report: VietNam Urban Upgradii Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal ard Roads Along Tan Hoa - Lo Gom C a d

Javeler Construction Co., Inc., 2007, http://www.iaveler.co~Ui~ment/Dredge%2OSym%2Omnents.h#Silt Scre ens) -

Health and safety plan for the dredging operation:

+ The removal of contaminated materials fiom a waterway can be a hazardous activity, especially if contaminant concentrations are high. Depending on the types of contaminants present, the concentrations expected, and the degree of contact workers may have with the sediment, it may be necessary to provide workers with special PPE, such as respirators and Tyvek coveralls. Such gear can decrease the productivity of workers and thereby greatly increase operating costs. This is particularly true if workers are required to wear respirators or use supplied air. However, in most cases sediment contaminants are not volatile, and therefore respiratory protection is rarely needed.

+ Health and safety plan for the dredging operation will be integrated in HEST (Safty, Health, Environment and Transportation) program mentioned in below section.

Figure 5.1 - Application of silt curtains and screens in dredging area of interaction between Tan Hoa - Lo Gom and Tau Hu canal

52.43. Mitigation measures for transportation

As mentioned in chapter 4, the impacts related to transport of dredged materials fiom temporary storage site of the project to Da Phuoc treatment area are the followings:

Leakage and overflow because of high wave andlor rainfall;


Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - I,o Gom Canal

Illegal disposal of dredged materials; Risk of sinking barges.

The main mitigation measures to settle down the impacts of transportation of dredged materials are as follows:

Dredging methods: Apply the approved dredging methods. Firstly, dredged material will be temporarily stored in dredged area for drainage of free. Water contained in them. After that, they will be hold in closed containers in barge and transported to disposal area as mentioned in the later section. Dredging time should be short as much as possible.

Propose transport route: Dredging plan should be prepared, in which time, location, equipment, etc. should be clarified and evaluated. The following options of transportation route will be chosen in order of priority:

+ Option 1: 415,000 m3 (including 85,000 m3 contaminated sludge and 330,000 m3 excavated soil) will be transported to Da Phuoc Complex Solid Waste Treatment Plant by barges with the transport route Lo Gom canal 3 Tau Hu canal 3 Can Giuoc River 3 Rach chieu creek 3 Da Phuoc site (the distance is about 20.0 km).

+ Option 2: o 85,000 m3 contaminated sludge will be transported to Da Phuoc Complex Solid

Waste Treatment Plant by barges with the transport route Lo Gom canal 3 Tau Hu canal 3 Can Giuoc River + Rach chieu creek + Da Phuoc site (the distance is about 20.0 krn).

o 330,000 m3 excavated soil will be transported by vehicles or by barges. Vehicle will transport soil from excavating for box culvert and sewerage building. Barges will transport the rest. This process will be strictly followed Decree 7312007lQD- LBND issued by HCM city People's committee on 10/5/2007 about regulation on service of collection, transportation, and treatment of septic mud, sludge dredged from sewerage system and canal in HCM city.

+ Back-up (Option 3: Temporary applied when Option 1 and Option 2 are not applicable):

o Contaminated sludge will be transported by vehicles to treat in Tam Tan Sanitary Landfill in Cu chi district which is used to treatment municipal solid waste from HCM city.

o Excavated soil will be used for leveling in many projects in HCM city because the demand of leveling material is now really high. Companies who use the soil for this purpose must commit to comply with Decree 7312007lQD-UBND issued by HCM city People's committee on 10/5/2007 about regulation on service of collection, transportation, and treatment of septic mud, sludge dredged from sewerage system and canal in HCM city.

Prevent leakage and overflow of transported sludge: + Not transport the volume of sludge over limited barge capacity.

+ Use barriers to prevent overflow caused by rainfall.

+ Not transport in heavy weather time or in the time when large ships/vessels move.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HLTCTPMU) 100 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


Prevent illegal disposal of dredged material: + Educate and improve the awareness of environmental protection and regulate specific

responsibility to barge-owners and others related.

+ Monitor the activities of transport and disposal thanks to regular consideration of journal table of transport (transported sludge volume, time.. .) and of disposal (number of barges enters required disposal area, volume, time...). If there is any difference between transport times of origin site and destination site, activities of investigation will be implemented in the way of integrating with functional agencies. Hard punishments will be applied to any person who illegally disposes transported sludge orland makes sludge overflowed.

+ Investor will cooperate with functional agencies to monitor surface water in the river on transport route in order to identify pollution cause by illegal disposal and sludge overflow.

Prevent risk of sinking barges and accidents in waterway: + To make the suitable plan for transportation;

+ Cooperated with functional agencies to check and monitor waterway routes which have big ships/vessels in the same time of sludge transportation.

+ Follow strictly regulation of waterway safety during transportation time.

+ Barge - owners/operators and others related will be trained in health and labor safety and waterway code. Occupational safety equipments to protect labors will be delivered to related people.

+ Regular keep a close watch on hydrological regime in order to identify strong winds, storm or 1ong.term floods.

Prevent pollution caused by unloading sludge from barge to disposal site: Possibility that sludge and contaminants are swept out from Da Phuoc disposal site to Nha Be river is low, but water quality in Chieu canal may be partially contaminated. To prevent and minimize this impact, during period of sludge transport, contractors must follow the following regulations:

+ Only unloading of sludge into blocks on incoming tide and sludge must be unloading in remote location of the blocks.

+ If using pumps, the operation time is only on incoming tide and sludge must be pumped stirred suddenly after stirred.

+ Use silt curtains/screens in canal mouth into block in order to prevent solid wastes from swept out into the river. Before taking off the silt curtains/screens for barge coming, all solid wastes must be fished out from the water, and after that, the silt curtains/screens are installed again. Solid wastes will be managed and treated like transported sludge.

+ Regularly collect solid wastes from block in order to prevent pump or clamshell from technical obstruction. Such solid wastes will be managed and treated like transported sludge as well.



Environmental Impact Assessment Report: ViefNam UrbanLJpgrading Project - Ho Chi Minh Sub-project Sectorial Proibct No.4: Im~rovement of Canal and Roads Alone Tan Hoa -Lo Gom canal

'

Figure 5.2 - Excavated material transportation route by waterway

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) I UL


Environmental Impact Assessment Report: ViejNarn Urb?ntJpgrading Project - Ho Chi Minh Sub-project . . . Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa -Lo Gom canal

Figure 5.3 - Excavated material transportation route by land

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) I L J ~


Environmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - Lo Gom Canal

5.2.4.4. Mitigation measures for disposal of dredged materials

Proposed measure + According to the consideration as mentioned in Chapter Four, 85,000 m3 contaminated

sludge will be treated in Da Phuoc Complex Solid Waste Treatment Plant, 330,000 m3 excavated soil will be used for leveling as Da Phuoc site. The Proposed mitigation measure for dredged sludge and excavated material disposal is presented in Figure 5.4.

+ According to the Da Phuoc Plant Progress, the alternative options for contaminated sludge disposal are as below: o Option 1 - If the Da Phuoc Plant is not operational by the time of the required

timing for THLG SP04 construction phase, the contractor will be responsible for construction of the site, for which financial contingencies have been made. Project's Contractor should build a landfill (design of landfill is presented below). at the Da Phuoc site to dispose THLG contaminated sludge (excavated soil will be used as leveling material for Da Phuoc site). The contractor must to carry out environmental protection measures at Da Phuoc Site.

o Option 2 - THLG SP04 construction is after the operation of Da Phuoc Complex Solid Waste Treatment Plant: THLG contaminated sludge will be disposed by the landfill or treated by the sludge treatment process of Da Phuoc Plant (sludge treatment process and wastewater treatment plant for leachate wastewater fiom landfill and sludge treatment process are described in Annex 5.1). The Da Phuoc Plant has a responsibility to carry out environmental protection measures at Da Phuoc Plant.

The legal of proposed treatment measure + The proposed measure for Project contaminated sludge disposal as shown in Figure 5.4

is based on the Agre'ement Letter signed between PMU HCM Urban Drainage Company (Ref. No 234, dated 02/03/2009).

+ The EIA report of Da Phuoc Complex Solid Waste Treatment Plant was approved by the DoNRE dated in year 2008.

A spare proposed measure for contaminated sludge treatment of Project + The spare measure is proposed in case there are any objective problems relating to

transport routes to Da Phuoc Site or the sludge treatment process of Da Phuoc plant is breakdown.

+ Due to the contaminated sludge assessment as mentioned above, the contaminated sludge at surface bottom of Tan Hoa - Lo Gom are lower than the maximum level for disposal in a licensed landfill. Therefore, they can be transported by road to the Tam Tan Landfill at Cu Chi District for disposal. Transportation must be covered (no leakage of water) when transporting high humidity sludge of Project.

+ The remaining excavated materials (none contaminate) can be used as leveling material in construction areas, industrial area and agricultural area.

Design of landfill for Option 1 For sludge landfill, the design will be used as areas to store contaminated sludge and it will be disintegrated by micro-organism in the early stages by adding a septic mud layer 200mrn thick to increase breaking the link between heavy metals and organic

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMLT) 104 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


substances (based on the results of research: components of heavy metal in the polluted sludge are commonly associated as an organic link, source: "Re-Use of waste sludge for Industry and Improving agricultural land, Ms Nguyen Thi Phuong Loan). Sludge landfill at Da Phuoc site is designed with main parameters as follows: o Dimension : 200m x 250m x 2m o Height of disposal sludge : 2 m o Bottom layer and leachate collection system:

+ Sand layer 300mm thick

+ Clay layer 100mm thick

+ HDPE layer2.3mmthick + Geo-textile layer 1 OOmm thick

+ Sandlgravel layer 500rnrn thick and leachate collection system o Covered layer:



+ HDPE layer 1.5 mm thick

+ Geo-textile layer 1 OOmm thick

+ Sandlgravel layer 600rnm thick

+ Covered soil layer 500mm thick and planted. The cross sections of landfill are presented in Figure 5.5.



Figure 5.4 - Proposed mitigation measure for dredged material disposal

Volume - 85.000 m3 Volume - 330.000 m3

I 1 Sludge from dredghg c a d boWm 1

--

Canal width > 20 m Canal width < 20 m

Sealed Clamshell Dredging Self - design of crane or Backhoe machine

Excavating machine

I

Barge *

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUCTPMU) 106 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

1 1 Sludge transfer site Graverlly Soil

(Lo Gom Construction Site) transfer Station Can Giu& River (Sub-Urban area)

Crane

Barge Crane Rach Chieu Creek Truck (5-8 Ton) Barge

I

Crane,

Crane 1 -- Provincial + DA PHUOC

SOLD WASTE TREATMENT AREA

t

i

Rach Chieu Creek

highway 50 - w

2 0 U e, Crane

VA

g Temporary Landfill

(First stage)

4

0 0 0 + ~eachate

C E z s ; w v Recycle for land levelling at

Da Phuoc Plant

Leachate treatment plant Sludge treatment process

(Operation stage) at Da Phuoc landfill site

bnvlronmental Impact Assessment Report: .VietNam Urban Upgrading Project - Ho Chi Minh Sub-project I . . . Sectorial Project No.4: Improvement of Canal and Roads Along Tan Hoa - LOGO^ C d

Figure 5.5 - Cross sections of sludge landfill applied for Project sludge disposal

LEACHATE COLLECTION SYSTEM/

FINAL COVER LAYER DAILY COVER LAYER

SOILD LAYER 0 . 3 M

1 8 0 0 0 0 I

MUD LAYER 2 M LBP HLM CLU 0 , 2 M LEACHATE COLLECTION SYSTEM LAYER

CROSS SECTION O F LANDFILL

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 1u I



5.2.5. Mitigation measures for impacts of other kinds of solid wastes

Other kinds of solid wastes which should have suitable measures to manage and control are demolishment waste, construction waste and floating municipal solid waste fished out fiom the canal:

The sites for collecting construction waste in each upgraded area will be determined in detailed design phase and construction phase. These sites must be suitable with the transport, in order not to obstruct the activities of human beings and the waste must be transported during the day. Those produced by construction activities, for instance scrap iron, cement packaging, used formworks, etc are considered construction wastes. They will be properly collected, classified and gathered in specific location in project site. Recyclable waste such as paper wrapping, plastic, iron waste will be sold to scrap dealer. Un.recyclable waste will be collected and treated by a reputable waste collector companies. Specially, all municipal solid waste floating on the canal will be collected and treated as other kinds of solid. The facilities and equipments used for fishing solid waste fiom the river in Vietnamese condition are illustrated in Figure 5.6 as a reference. The disposal site, route for transport of these wastes, facilities ... must be planned specifically. Mobile toilet should be installed at construction site of each package.

Figure 5.6 - Facilities and equipments commonly used to collect solid waste floating in canal in Vietnam

5.2.6. Mitigation measures for impacts on traffic system

As mentioned in Chapter 4, traffic system can be influenced because of activities of transporting equipments, construction material, dredged materials, demolishment waste, etc. The problem having high probability to happen is traffic jam. The traffic sitedlocations which should have more consideration during construction phase are given below:

Sub-section 1 (fiom Ben Lo Gom road to Rach Ong Buong Bridge):

+ Bridge: Pham Van Chi Bridge, Hau Giang Bridge, Rach Ong Buong Bridge

+ Main intersection: Ben Lo Gom - Tran Van Kieu T-junction, Ben Lo Gom.Pham Van Chi intersection, Ben Lo Gom - Thap Muoi Boulevard intersection, Ben Lo Gom - Hong Bang Boulevard intersection.

Sub-section 2 (fiom Rach Ong Buong bridge to the begin of Kenh Tan Hoa road):

+ Crossing Road: Hoa Binh Road, Trinh Dinh Thao road, Trinh Dinh Trong Road To eliminate this impact, the following mitigation measures will be considered to apply during construction phase, if possible:

108 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (EUUPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Environmental Impact AsPmment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Make a suitable plan for project-related transportation and traffic activities (number and kind of equipments and vehicles, transport time, suitable route.. .). Set two temporary bridges up and downstream of replaced bridge. Roll-up construction with 50.100m length Select equipments and vehicles suitable to status of project site and nearby area; Transport time is reasonable; do not happen in rush hours. Choose alternative route which have smallest impacts on traffic system, avoid the route have high density of traffic flow and large population. Establishment of temporary passages and avoidance of moving in rush hours, if possible. For activities of repairinghuilding bridges, temporary bridges are filly feasible because all of bridges are small and short. Determination of temporary passages prior to construction and upgrading same when needed. Providing signposts, flash lights and traffic measures for traffic and work safety prior to digging roads. Roll-up construction, i.e. only moving to another section after installation of culverts and restoration of surface of one section. Restoration of road faces at the soonest. After completion, faces of roads and alleys and sidewalks should be cleaned to secure traffic safety. Designing roadmaps for construction machines so as to avoid of traffic jams. Traffic congestion monitoring should be implemented at construction sites. Maintaining the fences around big construction sites to determine limits of construction activities. Proper use of objects for guiding traffic in rush hours; Full respect to the parts of roads used for traffic; prohibition subcontractors fiom leaving any machines on parts left for traffic. Cooperation with local authorities for regulating traffic and reducing traffic jams in the places where fences for construction have been set up.

Additionally, the project should take measures to minimize any impacts on the road systems in the vicinity of construction sites, those include:

State of roads should be recorded in details prior to construction activities; Adjacent roads should be checked up in term of quality on a weekly basis and repaired if required throughout the construction; After construction, roads should be re-checked and compared with the previous state and in case of any downgrade; related roads should be restored to the recorded state.

Group of HEST (Heath, Environment, Safety and Transport) will be established (see Chapter 7) and make plan, check the implementation of mitigation measure approve before.

5.2.7. Plan to remove related infrastructures in project area

Referring fiom other projects carried out in HCM city, the activities of moving some related existing infiastructures can cause some problems, especial moving electric system, plant, telephone network, and supply water pipe.. . Therefore, the below mitigation measures should be applied:

Collect information about the existing infiastructures fiom their management unitdagenc ies;



Announce the information about the project via public media such as newspapers, television, Internet.. . Inform to the management unitslagencies the construction schedules by letter. Make suitable plan for moving the existing infiastructures in project area in the way of integrating with the management unitslagencies. Getting agreement on infiastructures removing plan with management unitslagencies before starting construction works.

Create favorable conditions for management unitslagencies to move and install infrastructure in project area.

5.2.8. Other mitigation measures for other impacts

5.2.8.1. Conflicts between workers and workers, worker and local people To eliminate conflict between construction workers and local population, the measures will be implemented as below:

Do not allow construction workers to stay overnight in construction site; To reinforce training, propagation about citizen consciousness for construction workers. To inform immigrating workers the culture and habits of local population To contact closely with related authorities in order to manage construction workers in temporary residence.

5.2.8.2. Health and occupational safety

To assure that contractors provide good sanitary condition and occupational safety for construction worker during construction phase in order to prevent labour accidents, traffic accidents, traffic accidents, the project will apply the following mitigation measures:

Prevention of labor accidents and occupational health for construction workers: + Beside of installation of adequate construction camps and sanitation facilities for

construction workers to control of transmission of infectious diseases, constructors should provide workers equipment for noise, vibration and dust controls. These equipments should be available to all workers and still in good condition.

+ A first aid station will be installed in construction camp of each package.

+ The constructors should carry out suitable training programs on occupational health and safety for workers

+ Use local employees as much as possible;

+ Not store easy flammable materials in construction site; they must be transported out of project site.

+ Equip occupational safety clothes for worker when necessary according to the requirements of Ministry of Invalid Social and Labor.

+ Plan and apply the settling program when occupational accident happens.

+ All electrical means and cables should meet safety standards and be checked regularly to avoid of electricity-related accidents (to workers and people).

Trafficsafety: + All adequate measures such as construction of crossing roads and interchanges,

installation of transport signs and lighting systems will be applied to assure transport safety. Transport signs should be installed at the places where accidents

110 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HITUPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


may be easily happened (populated centers, schools, hospitals, commercial areas, and passes.. .).

+ One of the most important measures for traffic safety is education in transport regulation. Regarding the fact that most of traffic accidents in Vietnam are caused by motorbike drivers who did not strictly follow the transport regulations. Therefore, local TV, radios should participate in the education programs and information booklets concerning traffic safety should be distributed for local people and drivers.

+ All construction machines and vehicles should abide by the regulatory speed of 5krn per hour in the sites under construction. In case of using specializing means, they should be isolated and responsible people should be appointed to warn people of danger related to such specializing means.

+ All digging and installing work items that are not accomplished should be isolated and warned of by signposts and flash lamps in nighttime so as to avoid of accidents to motorcycles riders in the rainy season as well as to active children nearby.

+ Progressively rehabilitate the trenches once works completed, if possible.

+ Lightning control system will be equipped according with current requirements and standards of Vietnam.

Preventing fire and explosion: + All fuel-using means should be strictly managed. Storage of fie1 at construction

sites should be prohibited so as to avoid of fire.

+ The fire prevention and warning system will be installed in needed locations in construction site based on Law on Fire Prevention and Regulations approved by Fire Prevention Division of HCM City Police Department.

+ At each large construction site, medical first aid station should be set up.

5.2.83. Restriction of impacts on landscape, aesthetics and living quality in the construction sites

As mentioned in Chapter 4, the impacts on landscape and visual space in construction phase are unavoidable and temperate temporary. However, these impacts may be minimized thanks to performing enough environmental protection measures by investor as above proposed.

53. MITIGATION MEASURES OF NEGATIVE IMPACT IN OPERATION PHASE Basically, the project mainly provides positive effects on environment and socio-economic condition in operation phase. However, some inevitable negative impacts should have mitigation measures to mhimise the impact and maintenance project's advantages. These are given below:

53.1. Protection of air quality and noise environment

Design roads and other infrastructure in arm of project as proper as design. Manage waste sources in Tan Hoa - Lo Gom basin, this is implemented by environmental agencies and related others of HCM city, District 6, District 11 and Tan Binh District. Educate community to protect environment in this basin thanks to People's Committee, Motherland Front Committee in different level (district, ward) in HCM city, District 6, District 1 1 and Tan Phu District. Frequently cleaning roads to reduce dust and watering roads in the dry season for the same purpose, if possible.


Environmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Restricting heavy duty trucks; allowing on dump trucks that meet sanitary standard, i.e. having covers and not dripping litter. Encouraging families to plant trees in the surroundings of their houses. Managing and restricting noisy entertainment businesses.

53.2. Protection of surface water quality of Tan Hoa - Lo Gom canal

53.2.1. Proposals for protection of water quality of Tan Hoa - Lo Gom canal

Build sewerage system as approved design to assure its proper operation. Setting up teams for regular management and cleaning alleys so as to avoid runoff water from bringing garbage to surface water sources. Encouraginglrequiring people's treatment of wastewater by means of septic tanks before discharge to common sewers. Periodically dredging of sewers and ditches to avoid of trouble water and spillage that are causative of poor landscape and hygiene in the project site. Moving out or strictly controlling local companies and enterprises such that they do not discharge effluent to the environment. Educate community to protect environment in this basin thanks to People's Committee, Motherland Front Committee in different level (district, ward) in HCM city, District 6, District 11 and Tan Binh District. Dropping solid wastes to canal must be banned and punished. Encouraging households to save materials and make full use of recoverable components so as to reduce the volume of refuse to be discharge to the environment.

53.2.2. Proposals for improvement of water quality of Tan Hoa - Lo Gom canal

As mentioned in Chapter 4, the water quality of TH-LG canal can be repolluted by the flow and load of wastewater discharged from domestic and industry in TI-JLG Basin. To be able to thoroughly improve the water quality of TH-LG canal, a CSO and wastewater treatment plant should be constructed. The CSO as described in Chapter Two will separate drainage system for runoff water and municipal wastewater. Wastewater will be collected a pumping station and conveyed to the wastewater treatment plant located in Binh Chanh District. The CSO can reduce over 90% pollutants load in wastewater in dry weather, so the water quality of Tan Hoa - Lo Gom canal will be strictly improved.

53.4. Other mitigation measures

Other mitigation measures should apply to minimise the impacts on traffic system, prevent trafic accident and control increased economic activities after completion of the project. To gain this goal needs cooperation between many agencieddepartments related to project area such as People's Committee, Motherland Front Committee in different level (district, ward) in HCM city, District 6, District 11 and Tan Binh District, HCM Department of Transportation and Civil.. . For example, peddlers must be banned from this area in order to keep the beauty of municipal landscape and/or prevent trafic accidents.



CHAPTER SIX

PUBLIC CONSULTATION

The public involvement and consultation program is conducted in order to: Provides usehl information, a better understanding of the project and its potential impacts and possible improvements to the project; Allows potentially controversial issues to emerge at an early stage; Creates opportunities for early resolution of the issues; and Helps to build transparent procedures for carrying out proposed project, and to create accountability and a sense of local ownership during project implementation

The World Bank's Operational Policy (OP 4.01) on Environmental Impact Assessment requires that affected groups and local NGOs to be informed and consulted as a part of the EIA preparation during at least two stages of the EIA-process: shortly after the EA category has been assigned and after the updated EIA-report has been prepared. Proper consultation is a requirement for EIA category A projects.

Participation is be enabled during project preparation under certain conditions and is generally recommended as part of implementation. Projects that require involuntary resettlement (OP 4.30), consultation on social issues should be included.

6.1. THE OBTECTn7E OF PUBLIC CONSULTATION During the implementation of environmental impact assessment study, the participation of the community is one of the basic guarantee to ensure the approval of the community with the project as well as to limit the negative impacts that can be lacked by the EIA team. In fact, if the community is involved as early in the process of project preparing that will be more easily to create the closely relationships between community and projects and from which, communities can contribute a lots of value suggestions for the project.

The public consultation should be carried out to understand the opinions and concerns of community in project area, especially with the people who will be directly affected by the construction and operation of the project. On this basis, people's concerns can be resolved reasonably in project implement as selectting conformable design solutions and proposing mitigation measures of environmental negative impacts. The public consultation questionnaire should be prepared for the purpose as follows:

Listen to the opinions and concerns of community for TH-LG projects, especially the directly negative impacts to the community's living conditions. Resolving conflicts in suggestions from the community related with environmental problems and the delay in implementation of construction plans by contractor. Review the proposals of the community and local authorities in project area. Understanding the difficulties that the people living in project area are interested.

6.2. PUBLIC CONSULTATION CONDUCTED BY CEECO 2.2009 In this stage, the EIA Study's Team undertook a public consultation from1212 to 201212009, the schedule is presented in Table 6.1.


Table 6.1 - Public consultation schedule conducted by CEECO

lT Place Wards

District No. 6 of local authority

Working time Date I Time

Contents Participation: 40-50 household, representation

The results of communities' opinions are described as presented in Annex 6.1. The communities' opinions can be summaried as below:

Communities' opinions on S.Project No.4 information: Most of people did not hear any information about SSP.04 (60%) however over 52% know the VUUP. The most interested effect of SP.04 is "Living environment is improved through the improvement of canals, landscape and roads along THLG Canal" that got 32% of people's opinions . Communities' opinions on environmental quality in project area during construction phase of SP.04:


+ There are 76% of people's opinions have agreement with "Project's construction will cause bad affections on environment (such as, emission gas, noise, dust...), social security communicate and traffic safety. However, theses affections will end when the construction of Project is finished".

+ There are 92% of people's opinions were considered strongly on "Constructor must implement effective measures to reduce environmental pollution, increase safety, avoids traffic congestion"

Duration time: 2h30' Introduction: 1. Local authority introduce participators 2. Environmental consultant describe: - Summary of SP.04 - Potential negative impact - Proposed mitigation Discussion Conclusion

Communities' opinions on extra information:

8h- 1 1 h -- 14h- 16h 8h-12h 14.h- 16h 8h-12h 14h-16h gh- 12h 14h-16h

+ There are 91% of people's opinions had agreement with "Increasing people's awareness on environmental hygiene is very necessary" and 92% know that: When environmental quality in living area is improved, the lives of people will be stable.

1712 1712 1812 1812 1912 1912 1712 1 712

1 - 2 3 4 5 6 7 8

+ And finally there are 85% of people's opinions want to contribute to the environmental monitoring during construction phase of SP.04.

Supports of community in order to maintain environmental situation after improving:

14 12

11 10 9 8 7 5

District No. 11 - 9 1 3 1 1812 1 9h-12h

Tan Phu District

+ Not dispose waste into inappropriate places + Enhance awareness and roles of self-management groups

10 11 12

+ Encourage environmental protection awareness of community

1 8/2 1912 1912

PhuTrung Hda T h y h

T h Th6i Hda

+ Arise awareness of people on hygienic, public dissemination of environmental protection

8h-12h 14h-16h 14h-16h

+ Establish self-management groups at quarter level, self-manage on environment, hygienic, area safety

+ Integrate with developments of local campaign (Ex. New culture quarter)


Environmental Impact Assessment Report: VietNarn Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

+ Assign the quarter self-management groups to organize collecting and managing solid waste collecting fee and signing directly contract with solid waste collecting private sectors

+ Establish develapment activities of cells, groups, clubs, enhance activities of Youth Union in order to keep on environmental green and clean.

63. PUBLIC CONSULTATION FOR RELIGION SITES IN PROJECT AREA The list of religion sites in project area is presented at previous chapter, all religion sites are interviewed by a questionnaire or by a meeting. The results of the public consultation for religion sites in project area can be concluded as below:

Evaluation of the support of religion manager: Most of religion managers are supporting the THLG project (516 votes), apart of Thao Duong Pagoda chose supporting with condition, and a requesting for granted land were proposed. Evaluation of the benefits of the Project: All Religion management are highly evaluating the benefits that the project will bring, flood minimizing is most interested. Concerned negative impacts in constructions: Dust, noise, bad odour. Expectation of religion manager: + Thao Duong Thien Tu pagoda (partly remove):

o Proposal 1: Adjust the design and minimize impacted land for the pagoda, only repossess land of pagoda land, not sanctum.

o Proposal 2: Repossess a part of pagoda land, and compensate the land of householders behind the pagoda

o Proposal 3: Move the pagoda wholly and provide other land to re-establish. o Proposal 4: Rebuild the pagoda with 08 floors on the rest of land after

repossessed (about 300 m2).

+ Binh Long shrine (wholly remove): Representative of I Binh Long shrine looks forward to compensation funds and has a other locations to rebuild the temple or getting fund to search a new position to build the pagoda by themselves.

+ Ngu Hanh shrine (wholly remove): Representative of 1 Ngu Hanh shrine looks forward to compensation funds and has a other locations to rebuild the temple or getting fund to search a new location to rebuild the pagoda by themselves.

6.4. PUBLIC DISCLOSURE The English version of EL4 report for SP.04 will be disclosed in the last week of ApriU2009 at VIDIC and in Washington DC. The Vietnamese version of EL4 report will be disclosed at PMU, HCM DONRE and related Wards in May, 2009.

115 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPIW) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Euvironmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

CHAPTER SEVEN ENVIRONMENTAL MANAGEMENT PLAN

According to the World Bank Operational Policies (OP.4.01, January, 1999) the "Environmental Management Plan (EMPI consists of mitigation, monitoring and institutional measures to be taken during implementation and operation to eliminate adverse environmental and social impacts, ofset them, or reduce them to acceptable levels". This Environmental Management Plan (EMP) given below includes an overview of necessary environmental considerations and actions to be taken during the detailed design, construction and operation of the project. The Plan includes a detailed work plan for the detailed design phase, and work plans for the construction and operation phases. This EMP is a working document, which will be updated and finalized at the end of detailed design, before project tender.

7.1. ORGANIZATION OF ENVIRONMENTAL MANAGEMENT AND RESPONSIBILITY

The Project Management Unit (PMU) will carry out and manage the project according to the regulations of the Government such as bidding process, control of time schedules, financial issues and quality control. The PMU will include a director, deputy directors, chief accountant, specialist of planning, construction, finance, law and environment, and administrative staff sufficient to carry-out its obligations under the Project.

The PMU has the responsibility for the implementation of the EMP. The institutional arrangements established for the main project under the HCMC Urban upgrading program during its phase 1 have proven to be effective and thus will continue to be used for this additional financing operation (Figure 1). The daily supervision of the mitigation measures (Table 3 below), which will be carried out by contractors, is included in the Terms of Reference (TOR) of a Construction Management Consultant (CMC) to be carried out by site engineers. Additional monitoring will be done at the community level as guided in a Community environmental management plan (CEMP). The PMU will be in charge of conducting monitoring of overall environmental changes during the project implementation. For this an independent environmental monitoring consultant will be hired to assist the PMU in conducting the environmental monitoring program (Table 5 below). The environmental consultant will also provide guidance to CMC and contractors in implementing the mitigation measures, as well as to the concerned local communities in carrying out CEMPs. A summary of the responsibilities of these parties and the reporting arrangements among them are presented in Table I and Figure 2 respectively.

To be effective, the PMU should work closely with community authorities to promote community participation in the planning, management, operation and monitoring of the project. In addition, environmental information campaigns (IEC) and environmental management training will be developed by the environmental consultant and will be provided to local residents to understand the infrastructure problems and their role in overcoming problems like cleaning and maintenance of the drainage system, proper household connections, prevention of illegal water supply and electricity connections, solid waste collection, condition of roads and street lighting. The PMU cooperate with the concerned companies in charge of water supply, sanitation, solid waste collection, street maintenance and electricity during the operation of the project to monitor operation and maintenance


Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Figure 7.1 - Environmental Implementation Organization - Ho Chi Minh City People's Committee

t t t 1

District PC A A A A t

v w Urban management Ward PC

4 Environmental consultant ke

Site Engineering i 4

Area leader

Community team

CMC I-

Figure 7.2 - Flowchart of EMP implementation reporting

4 Weekly report I

1 I Contractor / Government

INTERNAL SUPERVISION EXTERNAL ENVIRONMENTAL MONITORING



In case of environmental accidents, public complaints or as a random inspection course, DONRE carries out the following monitoring as mandated by the state environmental regulations:

8 Inspect execution of regulation:, norms of the prevention and overcoming of environmental degradation caused by pollution and environmental problems during the project implementation;

Cooperate with the PMU to inspect the execution of relevant environmental law, regulations and standards to be followed;

Determine and report all environmental pollution and problems, which occur in the project area and submit the inspection report to the People's Committee for consideration and decision;

The contractors have to follow and implement the mitigation measures mentioned in the EMP, and PMU has to follow activities of the contractors.

As required by the national regulations and the World Bank, PMU will prepare reports on environmental management, as a section in its regular progress reports, and submit to DONRE every six months after the project's commencement.

Table 7.1 - Institutional Responsibilities

11 8 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (EIUUPMU) 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Responsibilities Ho Chi Minh City PC shall manage administrative bodies of districts, the Department of Resources and Environment (DORE), Ho Chi Minh City Urban Traffic Management Body and the PMU Ho Chi Minh City DoNRE represents the MORE for environmental management. It shall be responsible for monitoring the project and responsible for any infiingement upon environmental management and protection policies of Vietnam. This state body will also have an important role to play in assessment of any change in designs that may cause environmental impacts. Ho Chi Minh City Urban Traffic Authority shall oversee the PMU for responsibilities related to environmental management of traffic. URENCO is responsible for collecting, disposal and treatment of solid waste including sludge PMU shall be responsible for any recommendation for upgrading in the project so as to protect and maintain the environment. PMU shall be charged of management of environmental impacts and monitoring of the project in the construction phase. PMU shall also foster and coordinate countermeasures to be taken in the construction phase Those engineers shall bear the main responsibility for monitoring the quality of works which are accomplished by contractors. They shall make key decisions on allocation of works, including assessment on the compliance of environmental protection regulations given in contracts, decisions on suspension of construction, on rehsal of payment

No.

2

3

4

Communitylagencies

Ho Chi Minh City PC

HCM CityDoRE

Ho Chi Minh City Urban Traffic Authority, URENCO

I

PMU

Construction Management Consultant (CMC)


6 Contractors r - l - I Environmental

Consultant

Responsibilities in case of breach of environmental protection clauses of contracts (methods, conditions, technical specifications, etc.).

No.

Contractors shall take countermeasures for environmental protection in the environmental management programs, including the measures to inhibit bad impacts on sensitive

Communitylagencies

objects as obligation of their contracts. Assist PMU in EMP implementation by: Carrying out monitoring of overall environmental changes causkd by the project activities Developing and training on site environmental management plan (SEMP) for CMC, and Community-based monitoring (CEMP) Assist PMU in compensation for losses & site clearance Assist PMU in relationship with communities Assure security for site Be in charge of supervision of project implementation Assist Community Representative Group Supervise environmental monitoring Play a role as a bridge between the PC of Wards and communities Mobilize communities participating in the Project Assist communities in training skills in order to participate effectivelv in the Proiect

9

I No.

Social Organizations and Associations at the ward level

I Communitylagencies I Responsibilities

7.2. TRAINING PROGRAM

The demand for training for described activities should be determined. Improving ability of environmental management program implementation should be incorporated with the development of mechanism - a bigger part in the project. The PMU (or other joint ventures) are recommended partaking training activities when required and suitable.

PMU: the officers in charge of environmental matters shall be trained for environmental monitoring and reporting

Subcontractors shall be trained how to monitor (noise and dust), to take countermeasures and to fill in monitoring reports.

The training programs will be included into Component 6. In addition to this the World Bank Hanoi office will give training courses how to implement the project.

Table 7.2 - Environmental Training Programe


CONTRACTORS Course Participants Frequency of training

Duration and type

Content

Implementation of mitigation measures Representatives of main contractors in charge of the reporting to PMU Once in the beginning of the assignment of each contractor, updating according to the needs, estimated number of contractors about 20 Half day lecture to the main contractors, submission of the examples of monthly monitoring reports

Briefing of overall environmental monitoring

Environmental Impact Assessment Report: VietNam Urban upgrading Project - ~ o ~ h i Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Monitoring duties of the contractor according to the contract documents

Monthly mitigation monitoring reports: content, what and how to monitor, how to fill the reports, submission of the reports, responsibilities

1 Environmental part of the quarterly reports: implementation of mitigation

1 measures, identified problems and solving of the problems I

Responsibility I PMU, Supervision Engineer, Consultant

73. PUBLIC INFORMATION PROGRAM AND COMMUNITY RELATION

The provision of information to the public will require the coordination of various communication efforts, systematic implementation, and a feedback mechanism through which input fiom the public can be received. To achieve this feedback mechanism, signage, and other promotional information and communication, could contain a contact number for the public. Signage showing the name of the Project, the name of Employer, and the name of Contractor should be located in at least 2 visible places at the construction site. Given the extent of the area that will be under construction, this may require more than one sign/or type of sign.

Local people have to be informed in advance about the public nuisance and especially about possible changes and disturbance for traffic. Rehabilitation works and new traffic arrangements during construction works could be announced to the public regionally in newspapers, TV, and radio. Locally the announcement could be given to the Phuong representatives who will inform the residents. Loudspeakers can be used during the construction work to give the latest information in concerned areas.

Some main principles for this effort may include:

The people need to be informed in advance about locations of construction activities

Starting of awareness campaign on environment for relevant parties, including contractor staffs, and establishment of a systematic approach to keep the public informed about construction activities

Implementation of public information and coordination program, including comments1 questions feedback mechanism (hotline, recognition and response to comments)

Meeting to discuss on construction plan and schedule with local businessmen (tourism service)

This aspect of the project will require the integration and efforts of many parties. Organizational requirements will need to be discussed and co-ordinated, details will have to be identified by responsible competent parties.

7.4. MITIGATION MEASURE PLAN

7.4.1. Summarized plan for mitigation measures during three principal stages

The project will be divided into 6 contract packages, each package has 5 components per each section of the canal. All packages are similar consisting of dredging, roads, bridges, CSOs and interceptors (for 4 packages), and box culvert (for 2 packages). Therefore, all mitigations mentioned in table below are equally applied to all packages. The PMU, with assistance fiom environment and TA consultants, makes sure that mitigation measures are included in the bidding documents. Mitigations measures are to be implemented by the contractors as obligations of their contracts, which will be supervised by the Construction Management Consultant (CMC). Environmental consultant, assisting the PMU, provides environmental training and advice to CMC, as well as local communities in supervising the implementation of the mitigation measures.


1 . . ' ~nvirdnmentd impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: In~provement of Canal, Embankment and Roads Along Tan Hoa -Lo Gom Canal

171 Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 5 Phung Khac Khoan, Dakao Ward, District 1 , HCMC.

Table 7.3 - Pollutionl Impacts

2.1. Dust Pollution and

Air Pollution

2.1. Noise

Summarized plan

Pollution Sources

and site c'earance~

truck,

Others activities

Demolition and

Supervision

PMUIDONRE

PMUIConsultant PMU

PMU

PMU

CMC Local Communitie

CMC

for mitigation measures during three principal stages Mitigation measures

I. DESIGN AND PRE-CONSTRUCTION PHASE Design and integrate environmental issues as an essential component of project

Clearly define the construction sites, main roads for transport, conflicts and adjust during transportation Identify the construction schedule and implement a public information campaign on the project and activities (timetable and duration) Prepare an approach to providing access to key sensitive receptors and keep public informed on a regular basis Set-up communication hot-line (identify institutional responsibilities for public relations)

11. CONSTRUCTION PHASE General mitigation measures: + Construction plan will be welldesigned and well-organized + All construction workstactivities will be monitored; the suitable adjustment will be proposed and applied

when necessary. Specific mitigation measures for each construction worklactivity: + Mitigating construction equipment exhaust emissions:

- All construction machines and vehicles must meet the standard on emissions (TCVN 6438:2001) and all industrial machines must satisfy the same standards applicable to equipment (TCVN 5939:2005, TCVN 5940:2005).

- Construction equipments with low emissions will be qualified to be used in construction - Sticking logos the logo of the project on all vehicles that serve the project and enforcing them to abide

by all traffic rules. Avoid traffic over stockpiles. - Regular maintenance of equipments must be carried out following approved construction plan.

+ Mitigating fugitive dust: The following specific mitigation measures will be applied for each emission sources~activities: - Debris handling, Cut/fill material handling, Cutlfill haulage: Apply wind speed reduction (use wind

fences if prevailing winds generate dust), wet suppression. - Truck transport:

Water all haul road twice daily (control efficiency: 37%). Washing all vehicles (if possible) before their leaving construction sites, sludge transfer station, sludge disposal site.

- Bulldozers, Pan scrapers: Wet suppression of travel routes. For building big culverts, setting up movable iron sheet walls (for rollup construction) of at least 2.5 m height to avoid of dust emission.

+ Operating noisy machines in daytime. Night-time shift should have appropriate permit and inform local

Execution

PMUI Consultant Contractor Contractor1 Consultant Contractor1 Consultant

PMU

Contractor Subcontractors

Contractor

, . > .

~nviromnentad lkpact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo G o n ~ Canal

Pollution/ Impacts Pollution

Pollution Sources

site clearance, trucks,

transport road, others activities

generation and site clearance1 occupation

hv~iene Waste water1 - - - - -- -

2.4. Waste from worker camps

nF E ~ ~ P E

Mitigation measures ~ ~ x e c u t i o n

production and-~cVN 6962:200 1 on vibration. i Work sites should be cleared of residual solid wastes and wastewater before works are undertaken. I Contractor

communities in advance + Publishing and registering working time of construction machines with local authorities and strictly

conlpliance therewith. + Employing only equipment and vehicles that meet the Vietnamese standards TCVN 5949: 1998 on noise

+ Wastewater should be rerouted or pumped to nearby drains whenever necessary. + Sensitive areas should be kept clean of liquid and solid wastes created by the project.

Subcontractors

Subcontractors

". .7..-., I+ Domestic solid wastes will be collected, transported into the city waste collecting sites. I+ Vehicles, pumps and equipment with significant oil leakage must be moved out of construction sites by1 Contractor

construction phase, install temporary toilets (mobile toilet) at the site, contract with local garbage

Workers collecting entities should be signed on periodically collection. + Not bury, bum domestic solid waste in the project site.

I I means of ~peci-alizing m e i s and the spillage positions should be treated immediately. - I Subcontractors


2.5. Waste oil

2.6. Solid waste

2.7. Traffic congestion

Maintenance process

Demolishment waste,

construction waste

Demolition and site clearance,

trucks, transport road, others activities

+ Vehicles, pumps and equipment must not be repaired in construction sites. + In some special cases such as minor repair, temporary maintaining services will be available in project

site. Oil and lubricant waste is not allowed to bury orland bum oil and lubricant waste in project site, but must be stored in proper oil-can, and collected and treated thanks to contract with l&al companies according to present regulation

+ Those produced by construction activities, for instance scrap iron, cement packaging, used formworks, etc are considered construction wastes. They will be properly collected, classified and gathered in specific location in project site. Recyclable waste such as paper wrapping, plastic, iron waste will be sold to scrap

+ Temporary access roads should be identified before construction begins and upgraded if necessary. + All roads and access sites must be restored to their original state as soon as possible. + Speed limits for the construction vehicles should be 10 k d h r on construction site and 30 kmlhour


dealer. Un-recyclable waste will be collected and treated by a-reputable waste collector companies. + The disposal site, route for transport of these wastes, facilities must be planned specifically + Co-ordination of coatruction works in local areas to facilitate traffic and minimize disturbance.

1 Subcontractors Contractor

+ The travel route for construction vehicles should be designed to avoid areas of congestion. + Separate traffic lanes should be designated for carsltrucks and motorcycleslbicycles. + If project works occur after dark, a lighting system should be maintained such that vehicles and

pedestrians can clearly see the construction area. + Traffic wedgeslislands should be installed to allocate reasonable traffic flow in rush hours; + One-way flow of traffic should be promoted whenever practical.

Supervision 7 CMC -4

CMCIDOT 7

I+ Project should supply traffic to co-brdinate traffic flow -in areas that are subject to congestion. vehicld I+ Before construction, the pre-project state of site access roads should be recorded by the project I Contractor ( CMCIDOT


" . I

Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvenlent of Canal, Embankment and Roads Along Tan Hoa - Lo Gonl Canal

Pollution1 I Pollution

Excavation

-I Impacts Sources

access roads I dredging

2.9. Sludge and dredged material

Dredging process/sludge transportation

/sludge treatment

2.1 0. Electricity management All activities

2.11. Labor accidents and occupational

for construction

workers

Mitigation measures

Activities of construction

workers, construction

activities

2.12. Traffic accident

Transport activities

I I + During construction, site access roads should be inspected weekly and repairs made as required duringl Subcontractors 1

Execution Supervision

main report. Dry method and Dredging method statement, which will be developed by contractors, are subject to review by environmental consultant before approval by CMC

Sludge and dredged material transportation: + Use specialized barges and trucks + Comply with water traffic regulations

construction. - Dredging process: + It must follow the Mitigation measures mentioned in item 5.2.4.2. Mitigation measures for dredging in the

CMC and DOT (Agency for water

transport)

CMC

+ N o discharging ballad waste along the waterways, but only in the unloading area Sludge and dredged material treatment: I Contractor JCMC and u R E N c o ( + If the Da ~ h u o c Plant is not available in time, the contractor will be responsible for construction of the

site, for which financial contingencies have been made. The storage should be able to prevent leakage and penetration to the surrounding environment

+ If the Da Phuoc Plant is available in time, contaminated sludge will be disposed by the landfill or treated by the sludge treatment process of Da Phuoc Plant, including leachate treatment. The Da Phuoc Plant has the responsibility to carry out environmental protection measures at Da Phuoc Plant.

+ Only approved electrical cables and other pieces of electrical hardware will be used on the project site

- - -

+ Equip occupational safety clothes for worker + Plan and apply the settling program when occupational accident happens. + All electrical means and cables should meet safety standards and be checked regularly to avoid o

Subcontractors

Contractor + Only qualified persons should install and maintain electrical systems used at the project site. These people

will be clearly identified by their clothinglhard hat. + Constructors should provide workers equipment for noise, vibration and dust controls. This equipment

should be available to all workers and still in good condition. + The constructors should carry out suitable training programs on HSET for workers

electricity-related accidents (to workers and people). -11 construction machines and vehicles should abide by the regulatory speed of lOkm per hour in the sitesl Contractor CMC and t r a d

Subcontractors

Contractor Subcontractors -I

under construction. / Subcontractors I police I I + All digging and installing work items that are not accomplished should be isolated and warned of byl I


2.13. Fire and explosion

Construction activities

signposts and flash lamps in nighttime. + All firel-using means should be strictly managed. Storage of firel at construction sites should be

prohibited so as to avoid of fire. + The fire prevention and warning system will be installed in needed locations in construction site


. * . ~nvirhmentrrl impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: ltl~provement of Canal, Embankment and Roads Along Tan Hoa - Lo G o n ~ Canal

3.2. Surface- water pollution

3.3. Sanitation aesthetics

--

Pollution Sources

Municipal wastewater, runoff water

Solid waste pile/Re-appear

low income picture

IMitigation measures I I+ Encouraging families to plant trees in the surrounding of their houses. I+ Periodically the dredge sewerage and the canal. + Educate community to protect environment in this basin. + HCM People committee should finish the program that moving out all local manufactories and enterprises

discharging processing wastewater into Tan Hoa - Lo Gom basin. + HCM People committee should find finding to construct WWTP for Tan Hoa - Lo Gom basin. + Local solid waste collection team must daily collect all solid from the public area and households. + Regularly maintain landscaping + People's committee in the districts must have suitable and strong regulation to avoid slum houses

rea~oearine in this area.

company Local

authorities

Local authorities

Supervision 1 Committee 71

Committee I

City People Committee i


Annexes of Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

7.4.2. Safety, Health, Environment & Transport program

Safety, Health, Environment and Transportation (HEST) Program will be set up with the main contents as follows:

a) Targets and principles

HEST Program has three main contents including Safety and Health, Sanitary and Environment, and Traffic management

Targets:

+ Plan to implement mitigation measures for health, safety, sanitary and environment and traffic flow distribution.

+ Manual for contractors to guideline applying mitigation measures during construction phase;

+ Legal background for monitoring the compliance of contractors carried out by related parties.

Principles:

+ Suitable to current regulation;

+ Suitable to local current condition and construction methods/organization of the contractors.

+ Must be feasible and has specific time.

+ Be approved by all related parties.

+ Announce popularly in construction site.

Procedure of establishment of HEST program:

+ Step 1 - Build draft of HEST program: Basing on requirements and commitments in contract documents, contractors must consider related documents, survey project area to set up draft of HEST program.

+ Step 2 - Refer opinions of related parties: o After finished, the draft TOR of HEST program is submitted to monitoring

construction consultants in order to be replied the opinions. The contractors will be finish HEST program.

o Methods used to collect opinions include the followings: (i) send the documents and get feedback, and (ii) conferencing in local area. Related parties participating in the conference are no limited, such as authority agencies (Department of Traffic and Transportation, Department of Natural Resources and Environment), representative people of local authority (at level of ward, district and city), and representative people of infrastructure management agencies.. .

o Final HEST program will be popularly announced to construction site and to related agencies.

+ Step 3 - Strictly comply with HEST Program and regular improvement: o Contractors must follow HEST program strictly. o Construction monitoring consultants has responsibility to monitor the

compliance of contractors basing on monitoring table (designed suitable to HEST contents)

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMLT) 125


Annexes of Environmental Impact Assessment Repo* VietNam Urban Upgrading project - Ho Chi Minh sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

o After 6 months or less, HEST program will be adjusted and improved one time in order to meet the requirement in practice. Any change must be agreed by related agencies.

Main contents of HEST program:

Basically, it must have the following contents:

+ Scale of project, construction items and summarized construction plan;

+ Applied technical standards and related legal backgrounds;

+ General requirements;

+ Specific mitigation measures (for each construction stage, construction characteristics);

+ Construction layout;

+ Plan for implementation and monitoring;

+ Plan for extended training for compliance of HEST program;

+ Procedure to solve risks/complaints related; + Annexes (manual to guide safety, guideline to solve risk, important telephones.. .)

Contents of HEST program are presented into specific subjects including Safety. Health, Sanitary, Environment, and Traffic Distribution.

7.4.3. Proposal measures for Sensitive Receptors

The project will be constructed in the area with relatively high population. A sensitive receptor has been surveyed, identified and divided into 4 types as follows:

(1) Schools, colleges and kindergartens (2) Religious sites (3) Residential buildings, recreational areas (4) Hotels and restaurants

The contractor should include in the EMP details of the plan in order to meet requirements for sensitive receptors. This also includes construction permit application at some intensive security areas. Main aspects are discussed here below:

(1) Schools, colleges and kindergartens: (a) Inform and get agreement on the time and duration of work (b) Provide accesses with high safety for children (c) Minimise mechanical works (d) Handle the works with maximum care to minimise the noise and dust

(2) Religious sites (pagodas/temples and churches.. .): (a) Inform and get agreement on the time and duration of work (b) Provide appropriate accesses (c) Keep the work tidy

(3) Residential buildings: (a) Inform and get agreement on the time and duration of work

(b) Provide accesses with high safety for ambulances and patients (c) Minimise mechanical works (d) Handle the works with maximum care to minimise the noise and dust

(4) Hotels and restaurants, recreation sites: (a) Inform and get agreement on the time and duration of work (b) Handle the works with maximum care to minimise the noise and dust



Annexes of Environmental Impact Assespment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

(c) Minimise mechanical works

Number of the sensitive receptors found in surrounding area of the project possibly impacted by construction activities is summary in Table 7.4.

Table 7.4 - Number of the sensitive receptors found in the project area.

7.5. ENVIRONMENTAL MONITORING PROGRAM

Code 1 2 3 4

The contents of the monitoring program include:

Monitoring of characteristic parameters of air pollution and water pollution;

Kinds of Sensitive receptors Schools, colleges and kindergartens Religious sites (Pagodas/temples and churches) Residential buildings Hotels and restaurants, recreation sites

Total :

Checkup of the implementation of countermeasures, mitigation of negative impacts on the environment and measures to control environmental pollution after the project is put into operation;

Quantity 6 2 1 2 11

Detections of risks of environmental deterioration to take countermeasures in due time;

Checkup of efficiency of pollution treatment apparatuses and equipment;

Determination of the strategy against pollution for protection of the environment.

The detail environmental monitoring program is presented in Table 7.5.

Table 7.5 - The detail environmental monitoring program



W

9 2 Z 3 r- 3 z" 0 Y 2 &

Noise and air quality monitoring + Parameters: Noise, Vibration, TSP, NOz, SOz, CO, NH,, H2S, C h , + Frequency/duration: 02 occasion, within one month before start of work + Number of sampling location: 6 sampling sites in total, 1 sampling point per package. Location

of sampling sites presented below Figure 7.3. + Applied standard: TCVN 5937:2005, TCVN 5948:1998 + Implementation: Environmental Consultant + Payment source: Project finding Water quality monitoring in TH-LG canal and downstream + Parameters: pH, SS, DO, COD, N-Total, P- PO,^, Oil and grease, Cr, Pb, Cd, Coliform. + Frequency/duration: 01 occasion within one month before start of work. The sampling time

should be taken at low tide and high tide. + Number of sampling location: 1 sampling sites per one package and 2 sampling sites at Tau Hu

Canal, 8 samples in total. Location of sampling sites presented in below Figure 7.3. + Applied standard: QCVN 08:2008 B2 Class + Implementation: Environmental Consultant + Payment source: Project funding Sediment qualitymmitoring + Parameters: Cd, Cr6+, Cu, Pb, Mn, Zn + Frequency/duration: 01 occasion within one month before start of dredging work + Number of sampling location: 1 sampling site per package, 6 samples in total. Location of

sampling sites presented in below Figure 7.3. + Applied standard: Refer to EPA-Victory Guideline. + Implementation: Environmental Consultant + Payment source: Project hnding


2 3

Z

2 U

2 E Z

8

Z

2 2 q 3 U



Checklist /auditing at construction sites: Site environmental management plan (SEMP) + Parameters:

o Implementation of measures to control dustlair pollution, o Noise level, o Spillage of oillhazardous waste, polluted sludge o Collection and storage of solid waste. o Overall sanitation

+ Frequencytduration: Monthly or in case of any people's complaint + Checklist location: All construction sites in 6 packages, thraughout the construction periods of

each package. + Implementation: HEST group of CMC + Payment source: Project finding Noise and air quality monitoring + Parameters: Noise, TSP, Vibration, NO2, SO2, CO, NH3, H2S, C h . + Frequencytduration: 02 occasion per year, during construction phase + Number of sampling location: 6 sampling sites in total, 1 sampling point per one package.

Location of sampling sites presented in below Figure 7.3. + Applied standard: TCVN 5937:2005, TCVN 5948:1998 + Supervision: PMU + Implementation: Environmental Consultant + Payment source: Project funding Water quality monitoring in TH-LG canal and downstream

+ Parameters: pH pH, SS, DO, COD, N-Total, P-Po~)-, Oil and grease, Cr, Pb, Cd, Coliform. + Frequencytduration: 04 occasion per year, during construction phase. The sampling time should

be taken at low tide and high tide. + Number of sampling location: 1 sampling sites per one package and 2 sampling sites in Tau Hu

Canal, 8 samples in total. Location of sampling sites presented in Figure 7.3 + Applied standard: QCVN 08:2008 B2 Class + Implementation: Environmental Consultant + Payment source: Project hnding

Sediment quality monitoring + Parameters: Cd, cr6', Cu, Pb, Mn, Zn + Frequencylduration: 02 occasion p a year, during construction phase + Number of sampling location: 1 sampling site per package, 6 samples in total. Location of

sampling sites presented in below Figure 7.4. + Applied standard: Refer to EPA-Victory Guideline. + Implementation: Environmental Consultant + Payment source: Project funding

z 0 - w z 3 w a 8 -

Z

2% 2 2 w a 8

Noise and air quality monitoring + Parameters: Noise, TSP, NO2, SO2, CO, NH,, H2S, C h . + Frequencylduration: 02 occasion p a year for 1 year after the project is put into operation + Number of sampling location: 06 sampling site. Location of sampling sites presented in below

Figure 7.4. + Applied standard: TCVN 5937:2005, TCVN 5948:1998 1

Water quality monitoring in TH-LG canal and downstream + Parameters: pH, SS, DO, COD, N-NH3, N-N03-, N-Total , P-Po~)-, Oil and grease, Cr, Pb, Cd,

Coliform. + Frequencylduration: 02 occasion p a year, for 3 year after the project is put into operation + Number of sampling location: 4 sampling sites in TH-LG canal 2 sampling sites in Tau Hu

Canal. Location of sampling sites presented in below Figure 7.4. + Applied standard: QCVN 08:2008 B2 Class + Payment source: HCMC budget

Annexes of Environmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

7.6. REPORTING

3 a

Z c 4 E 0

Introduction

Sediment quality monitoring + Parameters: Antimony, As, C 4 cr6+, CU, Pb, Mn, Hg, Ni, Ag, Zn + Frequencylduration: 02 occasion per year, for 3 year after the project is put into operation + Number of sampling location: 4 sampling sites in TH-LG canal 2 sampling sites in Tau Hu

Canal. Location of sampling sites presented in below Figure 7.4. + Applied standard: Refer to EPA-Victory Guideline. + Implementation: Environmental Consultant

Payment source: HCMC budget Hydrology monitoring

+ Parameters: section, velocity flow maxlmin, Hmin, Hmax, Qmin, Qrnax. + Frequencylduration: 02 occasion per wet and dry weather, 72 hours continuous measuring, for

3 year after the project is put into operation + Number of sampling location: 2 measuring points in TH-LG canal, one at Tan Hoa bridge, one

at Lo Gom mouth station. + Payment source: HCMC budget

Flooding point monitoring + Parameters: flooding time, area, flooding water level + Frequencylduration: 02 occasions per year after hard rain, + Number of sampling location: 4 flooding points in TH-LG canal + Payment source: HCMC budget

The Thang Long Consultant is responsible to carry out environmental monitoring of PMU monitoring. The Thang Long Consultant will submit Environmental Report to PMU and PMU will submit environmental monitoring reports to the DoNRE.

Report Recipients Copies of consultant's environmental monitoring reports shall be provided to the following: + WB: One copy in English and + PMU: 4 copies (3 in Vietnamese and 1 in English).

Frequency During construction phase and for the first three years of the operational period PMU are required to submit an environmental report to DONRE at six monthly intervals.

7.7. ESTIMATION OF COST FOR APPLYING ENVIRONMENTAL MANAGEMENT PROGRAM AND MONITORING

Table 7.6 - Estimate cost for environmental management program

I. PRE-CONSTRUCTION PHASE

Monitoring contents Number Of

NO. of unit price cost Frequency sampling site

Samples (1 000vnd) (1 000vnd)

1.1 Noise and air quality 1.2 Water quality At Project area and downstream canal 1.3 Sediment Quality 1 6 1 1,500 9,000

Total:



27,400

Monitoring contents

II. CONSTRUCTION PHASE

Frequency Number of sampling

site

NO. of Samples

Unit price (1 000vnd)

cast (1 000vnd)


Table 7.7 - Estimate cost for environmental training

1,800

7,200

44,800

18,000

71,800

Table 7.8 -Estimated Budget Costs for EMP Implementation

300

600

700

1,500

a contract covering both phase 1 and 2

Total:

1

1

2

1

IIL OPERATION PHASE



6

6

8

m-

2.1 Checklist /auditing at construction sites: 2.2 Noise and air quality 2.3 Water quality TH-LG canal and downstream canal 2.4 Sediment Qualit

Unit price

vND10 million

Course Subcontractor: application of countermeasures

1

2

4

cost (1OOOvnd)

7,200

16,800 18,000 80,000 4,000

126,000

Total

vND10 million

Total

Duration

Half a day

Times

Once for each subcontractor

VND 10 million

Attendants

5

Total:

NO. of Sample

1

2

1 2 1

Number of sampliag

site 6

6

6 2 4

Monitoring content

3.1 Noise and air quality monitoring 3.2 Water quality at THLG canal and downstream canal monitoring 3.3 Sediment quality monitoring 3.4 Hydrology Monitoring 3.5 Flooding point monitoring

Unit price (1000vnd)

600

700

1,500 10,000

500

Frequency

2

2

2 2 2

Annexes of Ewironment.1 Impad Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement o f Canal, Embaokmed and Roads Along Tan Hoa - Lo Gom Canal

Figure 7.3 - Location of noise, air quality, water quality and sediment sampling sites in pre-construction and construction phase

\

A1 -A6: Location of . surface water, sediment

monitoring stations in Tan Hoa Lo Gom canal.

RA7and RA8: Location of

stations in Tau Hu canal

Location of environmental monitoring stations


5 Phung Khac Khoan, Dakao Ward, District 1 , HCMC.

Annexes of Environmental Impact Assessment Report: VietNam Urban Upgr;ding Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvemeat o f Caoal, Embankment a d Roads Along Tan Hoa - Lo Gom Canal

Fignre 7.4 - Location of noise, air quality, water qnality and sediment sampling site in operation phase

Location of environmental monitoring stations



Annexes of Environmental Impact Assessment Report: VietNarn Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

CONCLUSIONS

1. The VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom has a great role in improving the drainage system, flooding inundation and landscape of THLG basin. It will contribute to development socio-economy of related districts, the project is strongly supported by the People Committee of Hochiminh City and people in the project areas.

2. The results fiom EIA study in the Last Design Phase can be used to predict the main potential environmental impacts of the project, which are indicated as follows:

The most significant negative impacts will associate with the pre-construction phase, e.g. relocation of land, houses and other constructions. Estimated over 1,600 of houses, shops, and infrastructure facilities will be relocated for widening the road corridors.

Some religious structures (temples, pagodas, and shrine) are expected to be relocated. Impacts of house and land relocation on the project affected persons (PAPs)/households will be negative and significant if no reasonable resettlement policies will be applied. However, based on the experiences from other similar projects, this impact is expected to be effectively mitigated before the construction phase. Data fiom the PMU show that the Hochiminh City with the proper relocation and compensation policy, most of the PAP were satisfied and no serious complaints were obtained fiom PAPS.

Traffic accident caused by increased transport on the canal side roads will be a problem in the first few years in the operation phase if the traffic will not be properly managed. On the contrary, it may be reduced due to road improvement and good traffic control.

3. In order to mitigate the potential negative impacts, an Environmental Management Plan (EMP) is recommended. The main issues of the EMP are as follows:

Implementation of reasonable resettlement programs to support stabilization of life of the Project Affected Households. They will include good policies in compensation, setting up resettlement sites with adequate infrastructure facilities and long-term supporting program.

Implementation of proper engineering measures, especially for dredging and excavating activities.

Implementation of adequate pollution control measures, including control of air, noise, vibration pollution at construction sites and the historical, religious, cultural areas near by the construction sites by adequate management and technical measures.

Implementation of comprehensive monitoring programs, including:

+ The monitoring programs for the RAP during the pre-construction and continuous phases.

+ The environmental pollution monitoring programs during the pre-construction, construction and operation phases.

+ Organization of an environmental unit in the PMU to manage environmental issues of the project.

+ Budget for the EMP, including mitigation, monitoring and institutional strengthening will be provided by PMU.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUWMU) 133


Annexes of Environmental Impact Assessment Report: VietNarn Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

REFERENCES

1. Law on Environmental Protection of Vietnam, Issued in 2005 (in Vietnamese).

2. Technical Data of the Project Provided by the Consulting Services

3. Guidelines for EIA, Proposed by WE3 4. Larry W. Canter, 1997. "Environmental Impact Assessment," University of Oklahoma,

Irwin McGraw-Hill, Second edition. 5. Jake Haulk.1998. Inland Waterways as Vital National Infrastructure: Refbting

"Corporate Welfare" Attacks", Allegheny Institute for Public Policy, p. 24. 6. Environmental technology series. Assessment of sources of air, water, and land

pollution. A Guide to rapid source inventory techniques and their use in formulating environmental control strategies . Part I and I1

7. NIOSH Pocket Guide to Chemical Hazards, NIOSH Publication No. 2005.15 1, September 2005.

8. .S. Department of Transportation, Federal Highway Administration. "FHWA Roadway Construction Noise Model User's Guide," FHWA.HEP.05.054, January 2006. (Available on Web site: www.rcnm.us)

9. U.S. Environmental Protection Agency, "Noise fiom Construction Equipment and Operations, Building Equipment and Home Appliances," NTID300.1, December 3 1, 1971.

10. E. Thalheimer, "Construction noise control program and mitigation strategy at the Central Arterymunnel Project," Noise Control Eng. J. 48(5), September - October 2000, pp. 157 - 165.

1 1. U.S. Department of Transportation, Federal Highway Administration. "Highway Construction Noise Handbook," to be issued mid-year 2006.

12. D.J. Martin, "Ground Vibrations fiom Impact Pile Driving during Road Construction," Supplementary Report 544, United Kingdom Department of the Environment, Department of Transport, Transport and Road Research Laboratory, 1980.

13. J.F. Wiss, "Vibrations During Construction Operations," Journal of Construction Division, Proc. American Society of Civil Engineers, 100, No. C03, pp. 239 . 246, September 1974.

14. J.F. Wiss, "Damage Effects of Pile Driving Vibrations," Highway Research Record, No. 155, Highway Research Board, 1967.

15. David A. Towers, "Ground-borne Vibration fiom Slurry Wall Trench Excavation for the Central ArteryITunnel Project Using Hydro-mill Technology," Proc. Inter-Noise 95, Newport Beach, CA, July 1995.

16. Swiss Consultants for Road Construction Association, "Effects of Vibration on Construction," VSS.SN640.3 12% Zurich, Switzerland, April 1992.

17. Department of Main Roads, Road trafic noise management: code of practice, www. mainroads.uldgov.au/ 2008.

18. Cecil Lue. Hing et a!., 1998. Municipal sewage sludge management: A reference tex on processing, utilization and disposal. Water Quality Library

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HCJUPMCT) 134


Annexes of Emironmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

ANNEXES OF ENVIRONMENTAL IMPACT ASSESSMENT REPORT

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HZnTPMU) 135


Annexes of Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

ANNEX 2.1 - THE CROSS-SECTIONS OF TYPICAL OF BANK PROTECTION. -

DOAN C ~ N G HOP 2 (B:2.0 x H:2.5) TO KM 6t828.94 O ~ N KM 7t392.07

R.C BOX CULVERT - TYPE 2 (B:2.0 x H:2.5) FROM KM 6t828.94 TO KM 7t392.07

Figure 2.1.1 - Typical 2 Cell - RC Box Culvert Section

TU KM 6t 1 1 2.33 I > ~ N KM 6t828.94 R.C BOX CULVERT - TYPE 2 (B:3.0 x H:2.5)

FROM KM 6t112.33 TO KM 6t828.94

Tim thidt k k Designed Center Line

T~fdnq c i i Larsen I I Temporary Sheet piles ~ -

Temporary Sheet piles I I I

Figure 2.1.2 - Typical 2 Cell - RC Box Culvert Section



TO KM 51291.70 D ~ N KM 6+112.33 R.C BOX CULVERT - TYPE 4 (B:2.0 x H:2.5)

TU KM 51291.70 D ~ N KM 6t112.33

Tddng cd Larsen Temporary Sheet piles

Tddnq cir Larsen - Terr~porary Sheet pile I

I I I

Figure 2.13 - Typical 4 Cell - RC Box Culvert Section

TU K M 4t355.82 D ~ N K M 5t291.70 R.C BOX CULVERT - TYPE 4 (B:2.5 x H:3.0)

FROM KM 4t355.82 TO K M 5t291.70

Tudng c d Larsen T V

Tim khao s i t - Survey Center line

Tudng c d Larsen - Temporary Sheet piles

I Figure 2.1.4 - Typical 4 Cell - RC Box Culvert Section

Thay d6i - - Variable


Tim thiGt k6 Designed Center Line


LY T R ~ N H KM 3+600 D ~ M KM 4+365

W N G DQC K ~ N H - 13M Station: KM 3+600 - KM 4t36.5 MNG DOC K ~ N H - 13M

ROAD ALONG CANAL - 13M ROAD ALONG CANAL - 13M

ca 00 o!r KEI!Y-TFF-$_~ZBM) - 1 i 664) D B G W CAWU E D L M L (-2 SQ . (. l6dae

Figure 2.1.5 - Open Canal Typical Section Open Channel with Reinforced Concrete Retaining Wall pype 5) on Shallow Foundation

(Sta. 1+680 to Sta. 2+300) and (Sta. 3+850 to Sta. 4+366)

I Figure 2.1.6 - Open Canal Typical Section 1 Open Channel with ~einforeed ~ o n c r e t e ~ e t a i n i n ~ wall (Type 5) with Cement Deep Mixing

(Sta. 1+400 to Sta. 1+680) (Sta. 2+300 to Sta. 3+300) (Sta. 3+300 to Sta. 8+850)

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HZnWMU) 138 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


I kote: Soil Improvement (CDM) under the Side Roads are necessary to stabilize and avoid sliding of Canal Sloped Walls.

Figure 2.1.7 - Open Canal Typical Section sloped ~ a s o n 6 Wall on wooden Piles

(Sta. 0+170 to Sta. 1+400)

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMV) 139 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


ANNEX 2.2 - RECOMMENDED TYPICAL ROAD SECTIONS AND ITS CORRESPONDING PAVEMENT STRUCTURE

~ R E N C ~ N G HOP- 30M L t TRiW: KM 7450 - KM 74450

COVERED CANAL - 30M STATDY: KM 7450 - KM 7 6 0

Figure 2.2.1 - Typical Road Section - (30 Meters Right-of-way) (Sta. 7+150 to Sta. 7+450)

Figure 2.2.2 - Typical Road Section - ( 13 Meters ROW) (Sta. 6+900 to Sta. 7+150)



(13 Meters ROW)

Figure 2.23 - Typical Road Section (13 Meters ROW) (Sta. 6+100 to Sta. 6+900)

(20 Meters ROW)

Figure 2.2.4 - m i c a 1 Road Section (20 Meters ROW) (Sta. 5+290 to Sta. 6+100)



Figure 2.2.5 - Typical Road Section (20 Meters ROW) (Sta. 4+365 to 5+290)

I Figure 2.2.6 - Typical Road Section (Soft Soil Area)

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HZTZTPMU) 142 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


Figure 2.2.7 - Typical Pavement Structure

K ~ T CAU MAT D W N G GlAO THONG

ROAD PAVEMENT DETAIL

LY T R ~ N H KM O+NO D ~ N KM M O O

OL~ING D ~ C K ~ H H - ~ 3 r d Station: KM 0+900 - KM 2+700 WNG DOC K ~ N H - 1 3 ~ ROAD ALONG CANAL - 13M ROAD ALONG CANAL - 13M

RC RElhlUlmi WALL

C.4 03 GAY KfUH MET Y< @-?81- 1-29523 OESIGk CAtlPL ED L E E 1 1.3 628) . ( ? 952l

- BCTONG N H ~ A CHAT TRAI NONG DAY - CAP P H ~ I DAM LOAl 1 DAY 2 0 CM

- CAP PHdl DA DAM LOAl 2 DAY 2 5 CM

- N ~ N o U ~ N G DAM CHAT K>=0.98

- VAI DIA K? THU&T PHAN CACH

Figure 2.2.8 - Typical Road Section (With 7.0 meters Wide Road on Both Sides)

IC'CM HOT BITUMINOUS CONCRETE, THICKNESS 1 0 CM

- GRADED AGGREGATE CLASS 1, THICKNESS 2 0 CM

- GRADED AGGREGATE CLASS 2, MICKNESS 25 CM

- COMPACTED SOIL TO 98% STANDARD PROCTOR DENSITY

- GEOTEMILE

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HCJLrPMU) 143


Annexes of Environmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

LV T R ~ N H KM 2t700 D$'N KM 3+300 Station: KM 2+700 - KM 3+300

D&NG DQC KENH - 6M D ~ N G DQC KENH - 6M WALKWAY ALONG CANAL - 6M WALKWAY ALONG CANAL - 6M

DESIGN CAM1 BED L E E 1 1-2 953 ( 2 M S )

Figure 2.2.9 - Typical Road Section (Parkways on Both Sides)

LY TRINH KM 3+300 ~f N KM 3+600 Sfation: KM 3+300 - KM 3 4 0

D&NG DOC K ~ N H 1 3 ~ D&NG DQC KENH - 6M ROAD ALONG CANAL - 13M WALKWAY ALONG CANAL - 6M

FIC RETAIMIHO WAU

uo w on rtw ~ I < T K< I.: a51 - $2 so) -- - OESGM c#ru ED L L ~ L ~2 . r-(-s 250)

Figure 2.2.10 - Typical Road Section (Road and Parkways)




LY TR~NH KM 3t600 O ~ N KM 4+365

WNG D ~ C K€NH 1 3 ~ Station: KM 3+600 - KM 4t365 E&NG DQC KENH - i3M ROAD ALONG CANAL - 13M ROAD ALONG CANAL - 13M

F!.00.9". +rtrm(r d.t225h,!.?aoe, 0 6 C H CAliLa ED LEVFL (4 254 . i.1548)

Figure 2.2.11 - Typical Road Section (Where Retaining Walls Occur)


Annexes of Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa- Lo Gom Canal

ANNEX 3.1 - DETAIL PROFILE ALONG PROJECT ROUTE Lo Gom street, A10-All: from Pham Van Chi street to building bridge area

- Asphalted Road, 5-6m width. - A lot of electric wives are across the street.

- Medium voltage electric poles are along - The little green trees are scattered the canal bank - Level-4 houses has metal sheet roof

- Funnel edges of gas are scattered on the covering which is not strong roads

Lo Gom stress, A9-A 10: from Van Than street to Pham van Chi street

- Asphalted Road, track width:4-5m - The little green trees are scattered

- Electric poles are along roads ,medium - Level-4 houses is not strong. voltage electric poles are along the roads which is opposite the canal bank

- A lot of electric wives are across the street

vl TRi KHAO SATAO -DV6HG VAN THAN CAU PWM VAN CHI

Lo gom street, A6-A7-AS-A9: From Phan Van Khoe-Bai Say-Ba Lai-Van Than

- Asphalted Road, track width:6-7m,pavement: 1 - 1.5m

- Medium voltage electric poles are along the roads which is opposite the canal bank,shifi to 2 sides from Bai Say to Ba Lai

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUlrPMU) 146 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


- There are no trees,Level-4 houses are essential

- vl KHAO SAT A6 - O&NG PHAN VAN KHOE

Lo Gom street, A 5-A 6: From Hau Giang bridge to Phan Van Khoe

- Asphalted Road, track width:6-7m,pavement: 1-1.5m

- Medium voltage electric poles are along the canal bank

- Electric wives are across the street

- The little green trees are scattered

- Level-4 houses are essential

Lo gom street, A3-A4-AS: From Le Quang Sung to Hau Giang bridge.

- Asphalted Road, track width:5-6m


- Very few little trees are scattered

- Level-4 houses which are not strong are essential

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HCTUPMU) 147 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


Ben Phu Lam street, A1 - A2: From Hong Bang to Hoang Le Kha

- Asphalted Road, track width:6-7qpavement: 1.5-2m


- The little green trees are scattered

- Level-4 houses which are not strong are essentia1,houses with one floor are scattered

D I ~ M KHAO SATAI-DWWG &W mu LAM OW KMO SATM - WG HOANG I+ KHA

C1, C2, C3: Tan Hoa bridge - From the head of Tan Hoa canal bank to Hoa Binh bridge

a. On the left(house with odds number)

- Medium voltage electric poles on the left( in the other side of canal bank) shift to canal bank's side after the turning.

- The short trees are scattered. Level-4 houses are essential.

b. On the right of canal bank is Dam Sen park



KTH,C3 -C4-C5: From Hoa Binh to Trinh Dinh Thao to Trinh Dinh Trong

a. On the left (house with odds number)

- Path-ways, stone, track width:3-4m

- Medium voltage electric poles on the left ( in the other side of canal bank)

- The short trees are scattered

- Level-4 houses are essential.

b. On the right

- Concrete road, track width:3-5m

- Medium voltage electric poles on the right


Annexes o f Environmental Impact Assessment Report: ~ -- ~

VietNam Urban Upgrading project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

( in the other side of canal bank)

- The short trees are scattered


KTH,C5 4 6 : From Trinh Dinh Trong to Huynh Thien Loc

a. On the left

- Asphalted road , width 7-8m

- Medium voltage electric poles on the left( in the other side of canal bank)

- The trees are scattered

- Houses are strong, house with one floor are essential

b. On the right

- Medium voltage electric poles on the right( in the other side of canal bank)

- The trees are scattered


KTH,C6 -C7: From Huynh Thien Loc to Thoai Ngoc Hau

a. On the left b. On the right,fiom huynh thien loc to khuong viet corporative housing

the turning near thoai ngoc hau, - Path-ways,stone,track width:3-5m Asphalted Road ,track width: 4-5m - Medium voltage electric poles on the right( in the

- Medium voltage electric poles on the other side of canal bank) left( in the other side of canal bank)

- The short trees are scattered - The short trees are scattered - Level-4 houses are essential



- Level-4 houses,houses with one floor

are essential


Annexes of Environmental Impact Assessment Report: VietNarn Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

ANNEX 3.2 - THLG canal and downstream canals water quality

Std. Dev 1 1.6 1 0.4 1 0.2 1 1,968 1 0.3 1 56.1 1 91.6 1 221.8 1 104.0 1 14.5 1 2.6 1 3.3 x lo6

Low Tide

N (missing) Min

Std. Dev.

TCVN 5942 Class B

1 Station RA7 - Tran Van Kieu Street (Saigon River direction) 1

I

36

0

29.3

Table 3.2.2 - THLG Canal Downstream Water Quality - Macro-pollutants, 2002 (Stations RA7 & RA8)

3 6 36 N (valid)

1.6

Parameter

Units

/ Station R.48 - Van Nguyen Bridge 1

36

0 1 0

0.04 1 0

Min

Max Mean

36 36

0.4

2.00

High tide


36 1 36 1 36 36 36

0

684

Temp

OC

29.3

32.4

30.5

Min

Max

36

0.0

SO:-

MgA

0

4.83

DO

mgOA

28.9 ppp

32.4

489.9

0.51 0.1

0

2

Salinity

%

SS

mgA

2,220

7,950

5,780

2.5

1.5

0.9267 0.1 2,150 6.7 160 - 4 0.5 8,360 7.15 345

0.4

5.5-9

COD

mg0A

0.4

0.3

0

27

Coliforms

MPNflOOml

EC

pS/em

BOD,

m m

6.8

7.1 1

6.97

23 ppp

104

27.5

PH

-

0

186

TN

mgA

150

280

188.8

38 8

70 29

72.0

80

TP

Mgn

0

62

19

52

33.8

3.8

12

414.9

35

0

14.56

57

103

79.2

0.21 --

196.5

25

1 . 1 0 ~ los

1.3-

0

2

17

38

26.3

0

1.1 x 105

45.9

8.4

13

10.4

2.6 3.0 x 106

0.7

1.45

1.0

1 . 9 0 ~ lo5

3.60 x lo6

1.55 x lo6


Mean 1 30.6 2 .3 0.31 5,9911 7-01 210.71 54.21 55.51 18.7) 8.3 0.7 1.34 x lo6l

Low tide Stntion RA7 - Tran Van Kieu Street (SaQon River direction) -

Min 1 28.61 0 .5 0.11 1.630 6.71 78.01 24.01 155.01 72.01 17.81 1.41 1 . 5 0 ~ 1 0 ~ 1

I I I 1 ' 1 I I I I I I I

Max 1 33.4 3.01 0.4 7,8201 7.241 3101 841 136) 5 7 15.71 5.781 7 . 7 ~ 10~1

I

Max

Mean

Mean 1 30.4) 1.41 0.3) 5,7401 7.01 202.31 44.01 100.71 35.81 12.51 2.11 1 . 9 ~ 1061

Table 33.3 - Statistical Data of THLG Canal Water Quality - Heavy Metals

1 parameter I Cu Pb Cr Zn As

Stntion RA8 - Van Nguyen Bridge

Min 1 28.1 0.51 0.11 2.3301 6.861 1281 211 671 131 101 0.91 1.2 x 10'

32.2

30.4

1 N (missing) 1 0 I 0 I 0 I 0 I 0 I 0 I 0 I

3.0

1.2

7- -- -

~ i g b ~ i d e (pa)

1 Minimum 1 0 1 3 . 2 3 1 0 I 0 I 0 1 84.5 1 0.46 1

N (valid)

0.3

0.2

36 1 36 1 36 1 36 1 36 1 36 1 3 6

Maximum

Mean

1 Variance 1 6.193 1 480.0 1 0.1 I 0 1 53.364 1 150.318 1 0.3 1

5,360

3,675

1 Range 1 3:;::

Median

1 Std. dev 78.7 1 21.9 1 0.3 1 231.0 1 387.7 1 0.6

372.8

78.6

6.9

6.8

-

123.1

14.2

1 N (missing) I 0 I 0 I 0 I 0 I 0 I 0 1 0 I

126.3

20.0

Low tide (pg/l)

1 Minimum I 0 / 5.66 1 0 I 0 I 3 1 1 2 2 ) 0 . 2 1 1

155.0

108.8

1.4

0

N (valid)

1.37

0.1

36 1 36 1 36 1 36 1 36 1 36 1 36 1

1 Median 1 39.8 1 15.05 / 0 I 0 I 251 1 424.8 1 0.995 )

487.0

184.5

-

0

0

Maximum

Mean -- Range

I Variance 1 4501 1 85.7 1 1.3 1 0 1 63.555 1 107.272 1 0.6 1

0

0

266.7 47.54 5.64 0 918 1435 3

61.8 17.9 0.4 0

266.7 41.88 5.64 0 915 1313 2.79

351.0

231.3

1,080.0

189.5

Table 3.2.4 - Statistical Data of THLG Downstream Canal Water Quality - Heavy Metals (pgll) (Stations RA7 & RA8)

1,080

255.7

Std. dev

QCVN 08:2008

2195.5

368.5

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 153 5 Phung Khac Khoan, Dakao Ward, District I, HCMC.

142.0

96.7

2,280

438.5

2.8

1.3

67.1

1,000

Cu

30.1

23.7

5.3

2.9

3.3

1.3

3.7 x lo7

1.3 x 1061

9.3

50

High Tide (pg/l) Station RA7 - Tran Van Kieu Street (to Saigon River direction)

Pb

1.2

20

Cd

0

2

Hg

252.1

1,050

Cr

327.5

2,000

Zn As


Low Tide (pg/l) I

, Station RA7 - Tran Van Kieu Street (to Saigon River d i r e c t i g

Min 1 0

Min

Max

Mean

( Station RA8 - Van Nguyen Bridge

0

6.5

3.1

Max

Mean

) Station RAS - Van Nguyen Bridge I

20.7

8.3

0

2 8

7.4

Min

Max

1 Mean

0

0.46

0.1

Table 3.2.5 - THLG canal and downstream canals water quality, March 2009

0

10.59

4.3

13.59

88.2

44.9

Min - Max

Mean

0

0

0.0

0

0.47

0.1

7.13

11.09

9.5

0 , 69.2

20.8

-

I I I I I I 1 - 1

T-N I m d l 1 17.1) 18.41 16.41 15.21 19.61 18.81 16.11 15.9

0

31.2

19.9

, -

SS DO

1 COD

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 154 5 Phung Khac Khoan, Dakao Ward, District 1 , HCMC.

0

0

0.0

0

0

0.0

0

8.17

4.4

Parameters

4 1.4

130

71.4

1.15

2.3

1.5

0

44

24.4

0

0

0.0

0

0.95

0.2

Unit

mdl

mg/l m&'l

148 1 . 1

139

115 1.3

148

24.3

1 04

64.8

36.1

42 1

153.6

0

0

0.0

Lo Gom Canal A1 I A2 ( A3 1 A4 I A5 1 A6

0.94

3.8

1.6 1

Tau Hu canal RA7 I RA8

145

7 636

40

697

301.1

2 1.8 ------ 72

42.2

0.59

1.7

1 .O

189 1 . 1

337

3 1

175

100.6

0.91

1.8

1.4

268 0.8 811

232 ---- 0.9

403

119 90


ANNEX 3.3 - TAN HOA-LO GOM CANAL SEDIMENT QUALITY ANALYSIS

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HSJUPMU) 155 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Annexes of Environmental Impact Assessment Report: VietNam Urban Upgrading Project - H o Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Source: Feasibility Study on Sanitation and Urban Upgrading of THLG Canal Basin, Volume 7, March 2003 1 1.1.6


except at Phu Lam Roundabout where the number of vehicle was counted only for one lane going to HCMC direction.

QUALITY

Dwt

mg/m3

0.42

0.45

0.28

0.40

0.41

0.27

0.34

0.57

0.58

I 0.33

0.36 -----

0.45

0.60

0.30

0.40

counted

- TAN

SOZ

mg/m3

0.13

0.21

0.15

0.17

010

0.13

010

0.12

0.17

0.29

0.18

0.18

0.12

0.307

0.16

0.21

in 15

ANNEX 3.4 - MONITORED AIR GOM

M4

mg/m3

0.52

0.55

0'37

0.42

0.35

0.38

0'27

0.30

0.26

0'26

0'70

0.85

OS8

OS2

lanes

(NOVEMBER

TRC

mg/m3

4.0

-- 3'5

4.2

2.2

2.7

4.2

4.3

2.7

2.8 pp

HOA-LO

NOz

mg/m3

0.035

0.032

0.022

0.026

0.017

0.016

0.012

0.013 ~~-~~~~~~

0.105

0.102

0.061

0.064

0.062

0.058

0.042

0.040

minutes

I/ Hao Giang Bridge (Sampling at the area along Lo Gom Canal, at small bridge adjacent to the House No 906B Lo Gom, W.5,

1 District.6.)

21 Junction of Nguyen Van Luong - Ly Chieu Hoang (Sampling at an area along Lo Gom Canal, at Material Transfer Station, adjacent to 144Bis Nguyen Van Luong, District.6.) (proposed pumping station)

CO

mg/m3

1.8

1.7

1.2

1.5 ~~~~~~~

1 0

2002) Number of

vehicles

minutes

Pcs/Zlane+

Mob :384 Auto: 36

Moto: 345 Auto: 51 1 Mob: 255 Auto: 21

Mob: 306 Auto: 21

Moto :456 Auto:l8

Mob : 420 Auto: 21

XzTz- Auto : 15

Moto : 360 Auto: 6

Moto: 3906 Auto : 802

Moto :3602 Auto : 726

I Mot0 :2245 -

Auto: 465

Mot0 :2250 Auto: 450

------

Parameter

Time

1.0

Peak Traffic Time

~ o m a l Traffic Time

--

Peak Traffic Time --

0.7

0.7

3.2

3.5

2.1

2.5

2.6

2.5

1.8

1.8

with two

6.2 Auto : 466

7: 00

17:OO

10:OO -

15:OO

r 0 . 3 8

17:OO

7: 00

17:OO

1O:OO

15:OO

7: 00

17:OO

10:OO -

15:OO

31 Phu Lam Roundabout station (in front of the House No 387 Bis Hung Vong , W. 12, Dihct.6.)

4.2

4.0

- Note: * Number of vehicle was

Peak Traffic Time

Nomd Traffic Time

Moto : 1290 Auto : 315

Mot0 : 1205 Auto : 290

~ o r m a l ( 10:OO

for all stations

Traffic Time

41 Hoa Blnh Bridge station (in front of fiinh Viem's house No 50RB Hoa Binh, W. 19, Tan Binh District.)

15:OO

Peak Traffic Time

Normal Traffic Time


ANNEX 4.1 - CALCZTLATION FOR AIR POLLUTANTS OF EXHAUSTED GASES FROM BARGES AND TRUCKS USED IN PROCESS OF DISPOSAL OF DREDGED MATERIAL

There are some intended options for choosing route of sludge transport as presented in Annex 4.2. Which option chosen depends on the specific condition, but any option related to transport by barge is qualified because shipping by barge is, in general, more energy efficient, safer, little congestion-causing, little noise or air pollution-producing, and it has relatively small effects on land and community Dr. C. (Jake Haulk. 1998; http://www.caria.org/waterwayYfacts. html)

Table 4.1.1 - Options for transport routes of sludge to Da Phuoc solid waste treatment site Option Description Transport Condition

distance (km)

I By waterway (by barge) 1 Lo Gom canal + Tau Hu canal + D6i 17.0 East - West Highway

canal + 6ng 1611 canal + Ba LAO creek + Project is finished Rach chieu creek + Da Phuoc site.

2 Lo Gom canal + Tau Hu canal + Can 20.0 East - West Highway Giuoc River + Rach chieu creek 3 Da Project is NOT Phuoc site finished

I1 By road 3 From Hau Giang bridge + Thap Muoi high 13,3 A new road fiom

way+ Cha Va bridge + Can Giuoc street+ National Road 50 to Tung Thien Vuong + Nguyen Van Cua + Da Phuoc solid Nhi Thien Duong bridge* Provincial high waste treatment site way 50 + New road (constructed by THLG is built Project) + Da Phuoc solid waste treatment site

III Route integrated between by land and by waterway

4 (1) By land: From Hau Giang bridge + (1) 8.5 km A new road from Thap Muoi high way+ Cha Va bridge + (2) 7.0 km National Road 50 to Can Giuoc street+ Tung Thien Vuong + Da Phuoc solid Nguyen Van Cua 3 Nhi Thien Duong waste treatment site bridge + Pham The Hien road + Pham is NOT built Hung highway (2) Transfer: 3 Transfer Site (at Tac Ben Ro creek near Binh Hung wastewater treatment plant) f3) By waterway: 3 Cay Kho Creek 3 Ba Lao creek + Rach Chieu creek + Da Phuoc site

Total volume of dredged sludge and material is 415,134 m3, its density is about 1.3 tonlm3, so its volume is about 539,674 ton. Based on the existing condition of waterway and land transportation in HCMC, the appropriated barge is 500tons in capacity and 2.5 - 8 tons truck



capacity. Dredging time estimated is nearly 4 months (104 days). There are 8 alternative scenarios to transport as below:

Total distance per day in each scenario is as in Table 4.1.2.

Table 4.1.2 - Total transport distance per day for each scenario

L- Scenario 2

Scenario 3

Scenario 4

Truck Distance 1 )scenario

Scenario 5 Scenario 6

Scenario 7

1 Truck &tpacity: 2.5 tons in daytime and 8 tons in night time working (5 tons in average) /

Barge Distance -

(km/day)

I-- 122

144

25 65

Scenario 8

Number of transportation trip per day for alternative scenarios, calculated for 500-tons barges and 5-tons trucks

W d a y ) 0 0

4755 3039

29

70 0

4755 3039

5979 1

Notes: Barge capacity: 500 tons

40


3821

Scenario

Sludge (85,000 m3 in total)

Excavated materials (330,000 m3 in total)

By Water Barge

In each option, pollutants emission loading is different as figured out in Table 4.1.5 based on Table 4.1.3 and Table 4.1.4. It is an important base to choose route for transport of dredged sludge and material.

By Water Barge

By Land Truck

Barge with

17kmil3%~

by Land Truck

Barge with

17kdtrip

Truck with 13.3 h'trip

Barge with

20Mtr ip

Truck with13.3 km/trip

El,?; and a

transfer station

with ? km/trlp and a

transfer station

with 8.5 kmitrip anda

transfer station

Barge with 7

with lunItrip and a 20kmltrip

transfer station

Annexes of Environmental Impact Assessment Report: VietNarn Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gorn Canal

Table 4.1.3 - Emission factors from barge and truck movement

0.003 0.007 0.009 0.039

Source: Jake Haulk.1998

NO. 1 Pollutants 1 - -

Table 4.1.4 - Emission loading from transport of dredged sludge and material to Da Phuoc

Emission factor (glkm)

solid waste treatment site Scenario Hvdrocarbons / Carbon I Total I

-

Barge Truck

-

Table 4.1.5 - Total emission loading from transport of dredged sludge and material to Da Phuoc solid waste treatment site for each scenario (&day)

Barge

Scenario Scenario 1 Scenario 2 Scenario 3 Scenario 4 Scenario 5


Barge Truck

Scenario 6 Scenario 7 Scenario 8

1.59 1.87

228.55

146.71 228.61

146.76

287.01 183.95

Barge Truck

Hydrocarbons 0,12

0,14 933

6,14 9.54


0.00 0.00

185.44 -- 118.51 185.44 118.5 1

233.20

149.04

Truck -- I Scenario 1 1.1 o

Source: CEECO, 2009;

6,15 1 1,96

7,68

Scenario 2 Scenario 3

Scenario 4 Scenario 5 Scenario 6 Scenario 7

Scenario 8

Carbon Monoxide

0,37

0,43 33,36

21,47 33.37

Nitrogen Oxide 1,lO

1,29 185,66

119,lO ~ 185.70

2 1,48 41,86 26,87

0.14 0.03

0.07 0.03 0.07

0.00 0.04

119,14 233,20 149,40

0.00 9.5 1 -.---- 6.08 9.5 1

6.08

1 1.96 7.64

0.43 0.08

0.20 0.09 0.2 1

0.00 0.12

0.00 33.28

2 1.27 33.28

2 1.27 41.86

26.75

1.29 0.23

0.59 0.26

0.63

0.00 0.36

Annexes of Environmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

ANNEX 4.2 - THE DETAIL CALCULATION FOR NOISE IMPACT ASSESSMENT

In construction phase, noise is mainly generated fiom heavy equipments which can be defined as earth-moving equipment, such as excavating machinery like excavators, backhoes, and fiont loaders, as well as handling equipment like graders, pavers, rollers, and dump trucks. Noise levels at l m fiom heavy equipment range fiom about 72 to 97 dBA (Table 4.2.1).

Besides, operation of vehicles and stationary equipment such as pumps, power generators, and air compressors are noise sources. At 15 m fiom truck and dozer, noise level is about 88,85 dBA respectively. Noise level at 15 m fiom stationary equipment is about 68 - 88 dBA.

I 1 1 Bulldozer 1 79 + 93 I 86,O

Table 4.2.1 - Noise ranges at 1 m from common construction equipment and vehicles

1 2 1 Compactor I 72,O t 75,O I 73,O 1

No.

1 4 1 Scraper, excavator 1 8 1 ,O t 97,O 1 89,O 1

Transportation vehicles and construction equipmentsl

machinery

Noise level at 1 m (dBA)

3

Range Average

Tractor

5

5

6

77,O t 96,O

Truck

Traveling crane

7

8

1 10 1 Borehammer, hammer drill I 75.0 a 99.0 I 87.0 I

86,5

Pile driver

9

82,O + 96,O

76,O t 87,O

Scoop shovel

Road paver

88,O

81,5

81,O t 115,O

Generator

1 1

TCVN 5949-1998 : Noise in public and residential area (6 s 18h)

98,O

72,O i 84,O

87,O + 883

12

Labor Sanitary Standard of Public Health Ministry: Noise Allowable

Levels at Workplace (with exposure time lower 30 minutes)

78,O

87,7

71,O t 82,5

Concrete mixer

Source: Bolt et al. (1971, 1987); Western Highway Institute (1 971); WSDOT (1 991); LSA Associates (2002).

77,2

Compressor

Noise level will be decreased in accordance with the distance and can be estimated based on the following formula:

75,O t 88,O


8 1,5

73,O a 88,O 8 1 ,O


LP(&): noise level at l m (dBA)

Lp(x): Noise level at calculation site (dBA)

x: calculation site from noise generated source (m).

Using this formula, noise level from sources is calculated as in Figure 4.1.

If noise generated from vehicles and construction equipments meets valued mention in Table 4.2.1, it satisfies the regulated standards: It meets Labor Sanitary Standard of Public Health Ministry at >5m from sources, TCVN 5949-1998 (6 - 18h) at >5m from sources.

If applying assessment criteria in Table 4.18, vehicles and construction equipments have significant impact at <5m from sources except pile driver (<15m).

Figure 4.1 - Decrease of noise level with distance

Labor Saritary Stardard o l P a c Healh Mirisby(eware 8 bus)

A- uu

[ \, -c Tractor

TCVN 5991998 (6 -18w 75 +Scraper, examtot

1- Pile drier II / 4 - - - - Scoop I - Road paer

- - G e m o r I I - Concrete m b r II

1 I 15 minutes 1 5 110 1

Table 4.2.2 - Noise Allowable Levels at Workplace regulated by Labor Sanitary Standard of Public Health Ministry


No.

1

2

3

4

5

Exposure time

8 hours

4 hours

2 hours

1 hours

3 0 minutes

Noise standard (dBA)

5 85

1 90

5 95

5 100

I 105


8 hours

According to surveyed data (www.aberdeencity.gov.uk/), for construction of roadlstreet activities, noise level generated from activities of pavement build is largest (see Table 4.2.3).

Noise standard (dBA)

1115

No.

6

Table 4.23 - Noise created by road construction activities I I

Exposure time

< 15 minutes

Activity Noise level (dBA)

10 m 50 m 70 m

1 I Old-road destruction

1 2 1 Surface clearance, soil filling - -

1 31 ~ z v a z r d e a r t h moving

1 4 1 Pavement build

Source:: Website www. aberdeencity.gov. uW, 2008.

In project area and surrounding area, there are some sensitive objects possibly impacted by noise from construction activities (see Table 4.2.4).

Table 4.2.4 - Sensitive in project area and surrounding area should be concerned I Prediction of

No. 1 Historical site Description maximum noise level impacted

Behind Thao Duong Thien Tu pagoda

Distance from project: 10 m

Thien Phuoc pagoda

Hanh Nguyen pagoda

Near Tan Hoa bridge Distance from project: 10 m


Annexes of Environmental Impact Assessment Report: .-

VietNam Urban Upgrading project - Ho Chi Minh Sub-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Historical site

Phu Lam college

Center for children of District 6

Khuong Viet Apartment Building

Tan Phu School

Description

On Nguyen Van Luong street








Prediction of maximum noise level impacted

( d B 4




I Prediction of

No. Historical site Description maximum noise level impacted

( d B 4

I Phuong Nam School I 1

10

Table 4.2.5 - Criteria for assessment of noise impact


Using the criteria presented in Table 4.2.5, impact level is assessed as in Table 4.2.6.

Tri Duc School

Dam Sen park

1

2

Source: Website www. aberdeencity.gov. uk/: 2008.

Noise level (dBA) No.

3

4

At the corner of Hoa Binh street and the canal Distance fiom project: 5 m

Impact level

Sigdicant

Medium

85

> 75

65 - 75

Minor

Negligible

Table 4.2.6 - Assessment of noise impact on sensitive sites

1 I Technolonv I Normal time: 58 - 87 1 I I

55 - 65

< 55

No.

1

2


Historical site

Thien Phuoc pagoda

College of Food

Range of existing noise level (dBA)

Peak time: 72 - 93 Normal time: 71 - 92 Peak time: 60 - 88

Prediction of maximum noise level impacted (dBA)

7 5

68

Impact level

Medium

Medium


No. 1 Historical site ( Range of existing 1 Prediction of maximum I Impact 1 3

1 Medium A ) noise level (dBA) level

PhamVanChi 1 Peak time: 60 - 88 64

4 Primary School 1 HanhNguyen

5

( Medium 1 I Normal time: 7 1 - 92

h r for Children 1 Peak time: 60 - 88

Normal time: 58 - 87 Peak time: 65 - 88

pagoda Phu Lam college

74

75

7


I

1 1 Normal time: 63 - 86 1 I 1

8 1 Khuong Viet I Peak time: 65 - 88

10

11 I Phuong Nam School I Peak time: 65 - 88 1 75 1 Medium 1

74

74 of District 6 I Normal time: 59 - 87

75

Medium

Cung Hy restaurant

Apartment Building Tan Phu School

1 Normal time: 63 - 86 1


12


I Significant 1 ppp

TriDucSchool


78

Normal time: 63 - 86 Peak time: 65 - 88 72

85


Significant

Acoustics Standard - Noise in public & residential quarters - Noise limit as permitted (TCVN 5949- 1998)

45 - 65


ANNEX 4.3 - DETAIL OF VIBRATION IMPACT

Construction activity can result in varying degrees of ground vibration, depending on the equipment and methods employed. Operation of construction equipment causes ground vibrations that spread through the ground and diminish in strength with distance. Buildings founded on the soil in the vicinity of the construction site respond to these vibrations, with varying results ranging fi-om no perceptible effects at the lowest levels, low rumbling sounds and perceptible vibrations at moderate levels, and slight damage at the highest levels.

Construction vibration should be assessed quantitatively in cases where there is significant potential for impact from construction activities. Such activities include blasting, pile-driving, vibratory compaction, demolition, and drilling or excavation in close proximity to sensitive structures.

To assess the impact of vibration, the following procedure is used:

Damage Assessment:

+ Select the equipment and associated vibration source levels at a reference distance of 7,62 m from Table 4.3.1

+ Make the propagation adjustment according to the following formula (this formula is based on point sources with normal propagation conditions):

PPVequip = PPVmf x (82,02/D)"

Where :

o PPVequip is the peak particle velocity in idsec of the equipment adjusted for distance

o PPVref is the reference vibration level in idsec at 25 feet fi-om Table 4.3.1

o D is the distance fiom the equipment to the receiver.

+ Apply the vibration damage criteria fiom Table 4.3.2.

Annoyance Assessment:

+ If desired for consideration of annoyance or interference with vibration-sensitive activities, estimate the vibration level Lv at any distance D from the following equation:

Lv(D) = Lv(7,62 m) - 301og(D/0,012)

Where:

o Lv(D): Vibration level at D m;

o Lv(7,62 m): Vibration level at 7,62 m from Table 4.3.1.

o D: distance fiom vibration to receiver.

+ Apply criteria in Table 4.3.2 for assessment.



Table 4.3.1 - Vibration Source Levels for Construction Equipment 1 No. 1 Equipment 1 PPV at 7,62 (mlsec) I Approximate Equipment 1 I

1

2

3

- -

4

(mlsec) Lv at 7,62 m

5

112 104

105 93

94

Pile Driver (impact)

Hydromill (slurry wall) + in soil

9 1 0

+ upper range + typical

0.002 + in rock Vibratory Roller

11 ( Small bulldozer

0.463 0.196

Loaded trucks --- Jackhammer

Table 43.2 - Construction Vibration Damage Criteria

Source: Swiss Consultants for Road Construction Association, "E8ect.s of Vibration on Construction, " VSS-SN640-312a, Zurich, Switzerland, April 1992.

0.005 0.064

7 8

Source: D.J. Martin. 1980, J.F. Wiss. 1974, JF. Wiss. 1967, David A. Towers. 1995.

0.001

1 2 3 4

To assess vibration impact, the criteria mentioned in Table 4.3.3 is applied.

Pile Driver (sonic)

75 94

0.027 0.027 0.027

Large bulldozer Caisson drilling

0.023

5 8

No.

+ upper range + typical Clam shovel drop (slurry wall)

8 7 8 7 8 7 86

PPV (mmls) Building Category


0.224 0.052

0.062

0.01 1 1

Approximate Lv NdBb -

102 94 98 90

Reinforced-concrete, steel or timber (no plaster) Engineered concrete and masonry (no plaster) Non-engineered timber and masonry buildings Buildings extremely susceptible to vibration damage

0,153 0,092 0,06 1 0,037

Table 43.3 - Ground-Borne Vibration (GBV)

Land Use Category

(1). High

Sensitivity

Im?act Criteria for General Assessment GBV Impact Levels (VdB)

Vibration-impacted site

Buildings where vibration would interfere with operations within the building, including levels that may be well below those associated with human annoyance

Frequent Events

65

Occasional Events

65

Infrequency Events

65


1 E d U s e 1 CatefPly

Source: Harris Miller Miller & Hanson INC., 2008. h ttp://www. hmmh.com.

Vibration-impacted site

(2). Residential

(3)- Institutional


equipment, but still have the potential

Notes: 1. "Frequent Events" is defined as more than 70 vibration events of the same source per day. Most rapid transit projects fall into this category. 2. "Occasional Events" is deJZned as between 30 and 70 vibration events of the same source per day. Most commuter trunk lines have this many operations. 3. "Infrequent Events" is defined as fewer than 30 vibration events of the same kind per day. This catenow includes most commuter rail branch lines.

Typical land uses: vibration-sensitive research and manufacturing, hospitals with vibration-sensitive equipment, and university research operations. All residential land uses and any buildings where people sleep, such as hotels and hospitals Includes schools, churches, other institutions, and quiet ofices that do not have vibration-sensitive

72

7 5

75

78

80

83

Annexes of Environmental Impact Assessment Report: VietNam Urban Upgrading project - Ho Chi Minh sib-project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

ANNEX 4.4 - THE SIMULATION OF DREDGE RE-SUSPENSION AND CONTAMINANT TRANSPORT MODEL The dredging activities have mainly impact on quality of Tan Hoa - Lo Gom surface water, but this impact is negligible and not noticeable because of reasons mentioned aboved. These activities in the section of KMO.00 - KM1+401.45, however, may impact on water boy of Tau Hu canal in the ebb-tide and in case of no applied mitigation measures (the most disadvantageous case). Therefore, assessing the level of increase in pollutant concentration in the section of KMO.00 - KM1+401.45 of Tan Hoa - Lo Gom canal on water quality of Tau Hu is necessary (Figure 4.4.1). Dredge Re-suspension and Contaminant Transport Model - Version 1.0 developed by Department of Civil and Environmental Engineering - University of Utah - USA is used to predict the increase and spread of pollutants in the area. Condition applied for this model is the most disadvantageous: Concentration of pollutants chosen fiom the data presented in Chapter 3 is highest; dredging time is on the strong ebb-tide; and no mitigation measures carried out.

Figure 4.4.1 - Dredging activities in the lower section of Tan Hoa - Lo Gom may impact on water aualitv of Tau Hu canal

Results: Increase in SS concentration and its spread: At distance of 5 - 10m fiom dredging location, SS concentration rises by 1,2 - 1,4 mgL, but at 80 m and more, its increase is insignificant, about <0,2 mg/L (Figure 4.4.2).

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HLRTPMZJ) 169 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


Figure 4.4.2 - SS increases and spreads caused by dredging activity

Increase in Fluorene concentration and its spread: At distance of < 20 m from dredging location, Fluorene concentration rises by > 7.10'~ m a , but at 80 m and more, its increase is insignificant, about <2.10" mg/L (Figure 4.4.3).

Figure 4.4.3 - Fluorene increases and spreads caused by dredging activity

Increase in Phenanthrene concentration and its spread: At distance of < 20 m fiom dredging location, Phenanthrene concentration rises by > 8.10-~ mg/L, but at 80 m and more, its increase is insignificant, about>2.10-~ mg/L (Figure 4.4.4).

Figure 4.4.4 - Phenanthrene increases and spreads caused by dredging activity

Increase in Fluoranthene concentration and its spread: At distance of < 20 m from dredging location, Fluoranthene concentration rises by > 2 . 1 0 ~ m a , but at 80 m and more, its increase is insignificant, about < 0.5. lo4 (Figure 4.4.5). Figure 4.4.5 - Fluoranthene increases and spreads caused by dredging activity



Increase in Pb concentration and its spread: At distance of < 20 m fiom dredging location, Pb concentration rises by > 0.30 mg/L, but at 80 m and more, its increase is insignificant, about <0.05 mg/L (Figure 4.4.6).

Figure 4.4.6 - Pb increases and spreads caused by dredging activity

Increase in Cu concentration and its spread: At distance of < 20 m from dredging location, Cu concentration rises by > 0.035 mg/L, but at 80 m and more, its increase is insignificant, about <0.01 mg/L (Figure 4.4.7).

Figure 4.4.7 - Cu increases and spreads caused by dredging activity

Increase in Ni concentration and its spread: At distance of < 20 m fiom dredging location, Ni concentration rises by > 0.020 mg/L, but at 90 m and more, its increase is insignificant, about <0.005 mg/L (Figure 4.4.8).

Figure 4.4.8 - Ni increases and spreads caused by dredging activity

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPIMU) 171 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

A4!~143a 8ur8palp Aq pasna:, spealds pue samal3ur u~ - 6.p-p a~&!d '(6-pap a~&!d) @w SOO-O< lnoqe ' ~ m ~ r j ~ u 8 ~ w ~

s! asval3uI SJ! 'a~ow pm w 06 JE Jnq '@w O Z O * ~ < Aq sasp uo!~a~~ua3uo:, !N ' U O I J E ~ O ~

8ul8pa.1~ wog w oz > jo a3ueJslp JV :paa~ds q! pua u o ~ a i ~ u a ~ u o ~ uz u! asaa.13111 .

l m e 3 uro9 07 - eoH u e ~ Buolv speox pue luaun(uequr3 '1eue3jo l u a r u a ~ o ~ d u r ~ : p . o ~ pafold Iepopas 13a[old-qng qu!~q !q3 OH- pafold B u p ~ B d n ueqln ureNla!A

:vodaa 8uamssassv p s d m ~ ~ s j o a m o o ~ ~ u 3 ~ 0 saxauuv


ANNEX 4.5 - CALCULATION OF CONTAMINATED SLUDGE The volume of dredged material had been calculated in the Final Design by the LBG consultant and the results are presented in Table 4.5.1 and the total is 415,134 m3. The dredged material includes:

(i) Contaminated sludge and solid waste at the surface of the canal bottom; (ii) Soil at the lower layer of canal bottom and canal bank.

The volume of contaminated sludge calculated in FS was 57.000m3. In this stage, based on the Final Design, it will be calculated as presented in Table 4.5.2 to Table 4.5.5.

Table 4.5.1 - Excavated material volume calculated bv LBG Consultant Station Length Excavated material

(m3

2 3 4 5 6

Package 3 KM2+290.46 - KM3+329.40

Package 4 KM3+329.40 - KM4+353.79

Package 5 KM4+353.79 - KM5+286.79

1401.45 2290.46 3329.40 4353.79 5286.79

Package 6 KM5+286.79 - KM6+854.36


Total:

15-21

10 - 14

8 - 10

2290.46 3329.40 4353.79 5286.79 6854.36

5 - 6

canal

)

6854.36

2.50

2.50

2.50

Table 4.5.4 - Estimate contaminated sludge volume in the bed of TH-LG canal

layer (m)

pp

(SD)

0.6 Package 1

KM0.00 - KM1+401.45

415,134

889.01 1038.94 1024.39

93 3 1567.57

Table 4.5.2 - Information of Tan Hoa - Lo Gom canal system

1038.94

1024.39

93 3

2.50



Package 1 KMO.00 - KM1+401.45

Package 2 KM1+40 1.45 - KM2+290.46

1567.57

48

cross-section (m) volume (m2) (S)

80,839 85,392 53,514 40,563 60,196

Average Width of

3 32.4

Open canal Open canal Open canal Box Culvert Box Culvert

Width (m)

26 - 70

15-21

Depth (m)

1401

Depth (m)

3 .OO

2.50

45.407

Section length (m)

140 1.45

889.01 ,

Depth of sludge

Excavated sludge Area of

Section length

Excavated Sludge

Annexes of Environmental Impact Assessment Report: VietNam Urban Upgrading Project - Ho Chi Minh Sub-project Sectorial Proiect No.4: Imorovement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

10.224

11.948

6.966

1 5.225

5.173

84.943

Table 4.5.4 - Volumes of excavated material

In addition, during dredging process, it is really necessary to fish domestic solid wastes out fiom the canal. Such waste has been uncontrollably thrown into the canal before by community living along the canal.

S = (W + 2D)*SD (m2) V = S*L (m3)

Package 2 KM1+401.45 - KM2+290.46

Package 3 KM2+290.46 - KM3+329.40

Package 4 KM3+329.40 - KM4+353.79

Package 5 KM4+353.79 - KM5+286.79

Package 6 KM5+286.79 - KM6+854.36

1 2 3 4 5


Total:

0.5

0.5

0.4

0.4

0.3

Package No

18

18

12

9

6

Length Excavated material

(m)

Total: 685436 , 415,134 , 84,943 , 330,562 ,

0.00 1401.45 2290.46 3329.40 4353.79

11.5

11.5

6.8

5.6

3.3

2.5

2.5

2.5

2.5

2.5

Notes Station

889

1039

1024

93 3

1568

From Km

140 1.45 2290.46 3329.40 4353.79 5286.79

To Km

1401.45 889.01 1038.94 1024.39

933

94,630 80,839 85,392 533 14 40,563

45,407 10,224 1 1,948 6,966 5,225

49,223 70,615 73,444 46,548 35,338

Open canal Open canal Open canal Box Culvert


ANlYEX 4.6 - MAX= CONTAMINANT CONCENTRATIONS ALLOWED IN SOIL

1 Disposal as fill material I Disposal to licensed landfill 1 TO BE DISPOSED OF AS CATEGORY C AND D

Category C Contaminants

Copper

Lead

Cadmium

Mercury

Chromium (VI)

Zinc

Nickel

Arsenic

Molybdenum

Tin

Category D

Selenium

Silver

Cyanide

(total) mg/kg dry weight

100

300

3

1

1

200

60

20

40

50

I I

(total) mg/kg dry weight

5000

1500

100

75

500

35 000

3000

500

1000

500

10

10

50

Fluoride I I

50

180

2500

Phenols (halogenated)

Phenols (non-halogenated)

450

I I

10 000

1

60

hydrocarbons I I

10

560

70

Benzene

Polycyclic aromatic hydrocarbons (PAHs)

I I

I I I I Source: EPA - Victoria - Australia - Publication 448 - Classification of Wastes - 7.2007

7

1

Benzo(a)p yrene

Total petroleum hydrocarbons C 10 to C36


4 I

100

20

100

5

10 000


ANNEX 4.7 - ESMATES WASTEWATER FLOW AND LOAD DISCHARGED FROM THLG BASIN

Estimates Domestic flow and load The wastewater flow parameters adopted for the THLG Project generally followed the stipulations in the Prime Minister's Decision is 200 Llpersodday (by interpolation) applied for Domestic, commercial, light industry in 2008 and 320 Llpersodday in year 2020.

Population projections are required for the determination of future wastewater flows. The District Statistical Offices provided population data for the period 2000 - 2008. The data for each ward in the THLG Basin was analysed to determine an overall annual percentage population growth by ward. These population projections have been used on a year-by- year basis to calculate future populations in each ward. Estimates of future population and wastewater flow rates are summarised in Table 4.7.1.

Table 4.7.1 - Estimates of future population and wastewater flow rates 2008 2008 1 Predicted I

Pollutant Load generation from domestic sources and treatment efficiency of septic tanks to be used for THLG Project is presented in Table 4.7.2.

Population in THLG Canal Basin Wastewater flow parameters Average Wastewater Flow (m3/d)

Table 4.7.2 - Pollutant Load Generation from Domestic Sources and Treatment Efficiency of

Without Project 663,786 2OOL/p/d 132.757

Septic Tanks

With Project 659,323 20OL/p/d 131.864

Parameters

Total Nitrogen Total Phosphorous

year 2020 71 1,995 32OL/p/d 227.838

Table 4.7.3 - Estimated load of domestic wastewater

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPIMU) 176 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

Pollutant load (glpersonlday)

Estimated load of domestic wastewater is caculated as presented in Table 4.7.3.

9 2.5

Parameters

SS BODs Total N

I Total P

Treatment Efficiency of Septic Tank (%)

43 45

1,659

2008 without project 1

Before Septic tank

66,379 33,189 5,974

913

After Septic tank

40,49 1 23,233 3,405

2008 with project 1

Year 2020

Before Septic tank

65,932 32,966 5,934 1,648

Before Septic tank

7 1,200 35,600 6,408

After Septic tank

40,2 19 23,076 3,382

0%) After

Septic tank 43,432 24,920 3,653

907 1,780 979


Estimates industrial wastewater flow and load In FS stage, the industrial wastewater flow and load discharged from Tan Hoa - Lo Gom basin had been predicted and the results are presented in Table 4.7.4 to Table 4.7.6.

Table 7

I * 30% - 40% tareet I

4.7.4 - Estimated Relocation of Industries from THLG Canal Basin 2002 - 2020

Wet Enterprises Dry Enterprises

Estimated Removal of Enterprises per Year (to 2020)

Number of Enterprises Remaining

in 2008

No of Main Polluting

Enterprises in THLG

Basin

1 Total

Table 4.7.6 - Estimated Loads

Number of Enterprises Remaining

in 2020

480 5820

Light Industry flow (m3/d) Other Industrial flow (m3/d) Total

Target removal

enterprises per year

Table 4.7.5 - Estimated Average Wastewater Flows from Commercial and industrial 6300

Total wastewater flows and loads in THLG basin Total wastewater flows and loads in THLG basin are summaried in Table 4.7.7 and Table 4.7.8.

Table 4.7.7 - Total Average Wastewater Flows

Estimated Removal of Enterprises per Year (to 2008)

100 268

2008 3 1,696 6,000

3 7.696

Industrial Load (kg BODId) Industrial Load (kg SS/d)

I Year I Domestic I Industrial I Total I

368

2020 17,068

0 17.068

3 0 187

2008 13,969 13,330


257

2020 8,8 17 14,694

2008 without project 2008 with project Predicted 2020

40 187 257

(m3/day) 132,757 131,864 227,838

225 (47%) 5 140 (88%)

Table 4.7.8 - Total Wastewater Loads (kglday)

0 4070 (69%)

5365

(m3/day) 3 7,696 37,696 17,068

Parameter s

SS BODS Total N Total P

4070

(m3/day) 170,453 169,560 244,906

2008 without project Domesti

c 40,491 23,233 3,405 913

2008 with project Industri

a1 13,969 13,330

- -

Domesti c

40,219 23,076 3,382 907

Predicted Year 2020

Total

54,460 36,563 3,405 913

Domesti c

43,432 24,920 3,653 979

Industri a1

13,969 13,330

- -

Total

54,188 36,406 3,382 907

Industri a1

8,817 14,694

- -

Total

52,249 39,614 3,653 979


Estimated pollutants concentration in wastewater Table 4.7.9 - Estimated ~ollutants concentration

1 I 2008 I 2008 I Predicted I TCVN 5945:2005 (

1 SS (mg/l) 214.5 2 14.7 161.8 200 60

Total P (mg/l) 5.4 5.3 4.0 8

I


BOD (mg/l) Without project

3 19.5 With project

3 19.6 year 2020

213.3 C class

100


ANNEX 4.8 - ENVIRONMENT IMPACT ASSESSMENT USING RIAM MODEL FUAM (Rapid Impact Assessment Matrix) is used to carry out integrated impact assessment for the project.

a) Advantage of RIAM: It is a powerful Impact Assessment system that organises and analyses the components selected by the scooping of any holistic environmental impact assessment. The RIAM method provides a completely transparent record of the judgments made in the process, coupled with a fast analysis system and results that can be simply presented. It can be used for a wide range of Impact Assessments at different levels of decision making and planning. RIAM has successfully been used for Initial Environmental Evaluation (IEE) and Environmental Impact Assessment (EIA), as well for Strategic Environmental Assessment (SEA) and Regional Environmental & Social Assessment (RESA). RIAM may be adapted for use in Sustainability Appraisal (SA), evaluation of performance and for programme/project prioritisation.

b) History of FUAM: The concept of FUAM was developed by Christopher Pastakia in the late 1 980ts, and coalesced into a system to demonstrate the degree of change in engineering project options and interventions. This was applied first in water resource and river management projects in Bangladesh in 199 1 -92.

In 1993 when Chris Pastakia joined the Danish Water Quality Institute (VKI) as Senior Environmental Advisor, he led a small team that further researched, tested and developed the impact assessment system he brought with him, and the named changed to RIAM at this time. The method became a standard system for environmental impact assessment in VKI, and was taught to participants from a wide number of developing countries in the Institute's Environment & Water Management Course. In the year 2000 VKI merged with the Danish Hydraulic Institute (DM) to form DHI Water & Environment. c) Basic of RIAM The important assessment criteria fall into two groups:

(A) criteria that are of importance to the condition, and which can individually change the score obtained

(B) criteria that are of value to the situation, but individually should not be capable of changing the score obtained.

Group A: A1 : Importance of condition

4 = important to nationaVinternationa1 interests

$3 = important to regionavnational interests

2 = important to areas immediately outside the local condition

1 = important only to the local condition

0 = no importance A2: Magnitude of changefeffect

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (KUUPMCT) 179 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


+3 = major positive benefit

+2 = significant improvement in status quo

+ 1 = improvement in status quo

0 = no changelstatus quo

-1 = negative change to status quo

-2 = significant negative dis-benefit or change

-3 = major dis-benefit or change

Group B: B 1 : Permanence

1 = no changelnot applicable

2 = temporary

3 = permanent

B2: Reversibility


2 = reversible

3 = irreversible

B3 : Cumulative


2 = non-cumulative/single

3 = cumulativelsynergistic

Level of impact: To evaluate the impact level, this model uses Environmental Score (ES):

(A 1 ) x (A2) = AT

(Bl) + (B2) + (B3) = BT

(AT) x (BT) = ES

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HCTUPMU) 180 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


Table 4.8.1 - Ranges Bands used for HAM

Description of Range Band

The environmental components used can be considered as four primary elements, which are defined as follows:

PHYSICALICHEMICAL (PC): Covering all physical and chemical aspects of the environment, including finite (non-biological) natural resources, and degradation of the physical environment by pollution.

BIOLOGICAL/ECOLOGICAL (BE): Covering all biological aspects of the environment, including renewable natural resources, conservation of bio-diversity, species inter- actions, and pollution of the bio-sphere.

SOCIOLOGICALICULTURAL (SC): Covering all human aspects of the environment, including social issues affecting individuals and communities; together with cultural aspects, including conservation of heritage, and human development. . ECONOMICIOPERATIONAL (EO): To qualitatively identify the economic consequences of environmental change, both temporary and permanent, as well as the complexities of project management within the context of the project activities.



d) Applying RIAM to the project

In construction phase I

Table 4.8.2 - Impact of the project on environment

Impact

PHYSICAWCHEMICAL (PC)

Code

1

2

3

8 1 Noise pollution in construction phase I PC08 ~ I I I

Demolishment waste in construction phase

Surface water pollution caused by increase in SS content during dredging process in construction phase

4

5

6

7

1 10 ( Waste oil fkom maintenance process in construction phase I PC10 1

PC0 1

PC02

Air pollution caused by odour compounds fkom dredged material in construction phase

Air pollution fkom the operation of vessel using transport dredged material in construction phase

Surface water pollution caused by accidental spills of dredged material and cooling water containing oil and grease in construction phase

Soil pollution and underground water pollution caused by disposal of dredged material in construction phase

Air pollution due to figitive dust and exhausted gases fkom trucks in construction phase

PC03

1 ) In operation phase 1 1 11

Air pollution and noise pollution due to figitive dust and exhausted gases in operation phase

- 1 13 1 Increase in surface-water pollution and sedimentation in operation phase 1 k 1 3 1

Domestic solid waste and wastewater in construction phase

1 14 1 In construction phase 1

PC1 1

1 15 1 Demolishment waste in construction phase 1 BE01 1

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMU) 182 5 Phung Khac Khoan, Dakao Ward, District 1 , HCMC.

16

I

18 1

Surface water pollution caused by increase in SS content during I BE02 dredging process in construction phase

Air pollution caused by odour compounds fiom dredged material in construction phase

Air pollution fkom the operation of vessel using transport dredged

BE03

BE04


I No- I Impact Code I I

I I material in construction phase

I 26 I Air pollution and noise pollution due to fugitive dust and exhausted gases in operation phase

-

Surface water pollution caused by accidental spills of dredged material

1 27 1 Increase in surface-water pollution and sedimentation in operation phase

20

22

23

24

2 5

and cooling water containing oil and grease in construction phase

Soil pollution and underground water pollution caused by disposal of dredged material in construction phase

Air pollution due to fugitive dust and exhausted gases fiom trucks in construction phase

Noise pollution in construction phase

Vibration impact in construction phase

Waste oil fiom maintenance process in construction phase Domestic solid waste and wastewater in construction phase

In operation phase

I11

2 8

SOCIOLOGICALICULTURAL (SC)

29

-

In design and pre-construction phase

Encroachment on residential land

30 1 Encroachment on technical facilities along the existing roads

SCO 1

I

Encroachment on historical/ cultural areas

SC03

3 1 I Compensation and resettlement

SC02

I

SC04

In construction phase I I

3 2

3 4

3 5

I I

37 1 Increase in land value in the area in operation phase I E01

SC06 Obstruction on traffic system

Occupation accident

36

IV

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HlJtrPMU) 183 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

SC05

SC07

In operation phase

Increase in probability of traffic accident SC08

Visual impact: Improve urban landscape

ECONOMICIOPERATIONAL (EO) 1

SC08

P


e) Results for applying RIAM for the project

Code

E02

No.

38

Impact

Increase in economic activity in the area in operation phase


RV

-A

N

-A

-B

-B

-B

-B

-A

-A

-A

-A

-B

-B

Table 4.8.4 - RIAM for Biological/Ecologica1 (BE)

Impact

BE0 1

BE02

BE03

BE04 pp

BE05

BE06

BE07

BE08

for PhysicaVChemical

B1

2

2

2

2

2

3

2

2

2

2

2

2

2

RIAM

A2

- 1

- 1

- 1

- 1

- 1

- 1

-1

- 1

- 1

- 1

- 1

- 1

- 1

Impact

PC0 1

PC02

PC03

PC04

PC05

PC06

PC07

PC08

PC09

PC10

PC1 1

PC12

PC 13

Table 4.8.3

A1

1

0

1

2

2

2

2

1

1

1

1

2

2

A1

1

0

1

B2

2

2

2

2

2

2

2

2

2

2

2

2

2

A2

0

0

0

component (PC)

B3

2

2

2

2

2

2

2

2

2

2

2

2

2

2

ES

-6

0

-6

- 12

- 12

- 12

-12

-6

-6

-6

-6

-1 2

- 12

B1

2

2

2

2

2

2

1

B2

2

2

2

0

0

0

0

B3

2

2

2

2

3

2

2

ES

0

0

0

2

2

2

2

RV

N

N

N

2

2

2

2

0

0

0

0

N

N

N

N


Table 4.8.6 - RIAM for Economic/Operational (EO)

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (KZTZTPMU) 185 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.

ES

0

0

0

0

0

B3

2

2

2

2

2

Impact

EOO 1

E002

Table 4.8.7 - Environmental Score (ES)

RV

N

N

N

N

N

B2

2

2

2

2

2

Table 4.8.5 - RIAM for SociologicaVCultural (SC)

Range value (RV)

PC

BE

SC

EO

Total

B1

2

2

2

2

2

A1

2

2

A2

0

0

0

0

0

Impact

BE09

BE10

BE1 1

BE12

BE13

-72t - 108

-E

0

0

0

0

0

A1

1

1

1

2

2

ES

-12

-12

-12

- 12

-12

-12

- 12

-7

28

A2

+1

+1

RV

-B

-B

-B

-B

-B

-B

-B

-A

C

B2

2

2

2

2

2

2

2

2

2

Impact

SCO 1

SC02

SC03

SC04

SC05

SC06

SC07

SC08

SC09

B3

2

2

2

2

2

2

2

2

2

A2

-2

-2

-2

-2

- 1

- 1

-2

- 1

+2

A1

1

1

1

1

2

2

1

1

2

B1

2

2

-36 t - 7 1

- D

0

0

0

0

0

B1

2

2

2

2

2

2

2

3

3

- 1 9 ~ - 35

-C

0

0

0

0

0

-lot - 18

-B

6

0

7

0

13

B2

2

2

- I + - 9

-A

6

0

1

0

7

B3

2

2

O t O

N

1

13

0

0

14

ES

12

12

RV

B

B

l t 9

A

0

0

0

0

0

lot18

B

0

0

0

2

2


Figure 4.8.1 - Graph of result of applying RIAM on each environmental components for the project

PhysicaVChemical component (PC) Biological/Ecologica1 (BE)

m C D E

SociologicaVCultural (SC) Economic/Operational (EO)



Figure 4.8.2 - Graph of result of applying RIAM on each environmental components for the project

Remarks: In general, the project has most impacts in the level of -B (Negative Changehpact) The following impacts should be specially concerned in order to have effective and feasible mitigation measures: + In design and pre-construction phase:

o Encroachment on residential land o Encroachment on historical/ cultural areas o Encroachment on technical facilities along the existing roads o Compensation and resettlement

+ In construction phase: o Dredging process, transport and disposal of dredged material.

o Demolishment waste in construction phase o Air pollution due to fugitive dust and exhausted gases fiom trucks. o Impact of noise pollution. o Impact of vibration. o Waste oil fiom maintenance process.

o Domestic solid waste and wastewater.

+ In operation phase: o Air pollution and noise pollution due to fugitive dust and exhausted gases in

operation phase

o Increase in surface-water pollution and sedimentation in operation phase. The mitigation will be proposed for each impact in all phases of implementing project.



ANNEX 5.1 - DESCRIPTION ON SLUDGE TREATMENT PROCESS OF DA PHUOC PLANT According to the approved EIA report of Da Phuoc Complex Solid Waste Treatment Plant, the progress of Da Phuoc Plant has two stages and that will satisfy the demand of sludge treatment of Tan Hoa - Lo Gom project. The progress of Da Phuoc Plant is presented as below:

I. Stage 1: In the first stage (from year 2009 to 2012), some main components of sludge treatment process have not yet installed but Da Phuoc Site has to receive excavated sludge form many Project. Therefore, in this stage, Da Phuoc Plant will construct several components as below:

o Weighting station, o Sludge receiver plat, o Landfill for sludge disposal

o Leachate collection system and preliminary treatment.

For sludge landfill, the design will be used as areas to store contaminated sludge and it will be disintegrated by micro-organism in the early stages by adding a septic mud layer 200mm thick to increase breaking the link between heavy metals and organic substances (based on the results of research: components of heavy metal in the polluted sludge are commonly associated as an organic link, source: "Re-Use of waste sludge for Industry and Improving agricultural land, Ms Nguyen Thi Phuong Loan). Sludge landfill at Da Phuong site is designed with main parameters as follows:

o Dimension : 200m x 250m x 2m o Height of disposal sludge : 2 m o Bottom layer and leachate collection system:



+ HDPE layer 2-3mm thick

+ Geo-textile layer lOOmm thick

+ Sandlgravel layer 500mm thick and leachate collection system o Covered layer:



+ HDPE layer 1.5 mm thick

+ Geo-textile layer 1 OOmm thick

+ Sandlgravel layer 600mrn thick

+ Covered soil layer 500mm thick and planted. The cross sections of landfill are presented in Figure 1.

11. Fully operation phase (since 2012): o In the operation phase, the sludge treatment process of Da Phuoc Plant is presented in

Figure 2. The capacity of plant is 3000 tons per day.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HLTUPMU) 188 5 Phung Khac Khoan, Dakao Ward, District 1, HCMC.


o For Tan Hoa - Lo Gom sludge landfill (if in case the TH-LG project built the sludge larndfill), it can continue closed unstill the Da Phuoc plant needs to reuse the landfill in order to dispose the solid waste generated from sludge treatment processing procedures.

o Wastewater discharged from sludge treatment process and from landfill should be collected and treated to meet TCVN 5945:2005 B class before discharge into the Rach Chieu Creek. The wastewater treatment technology of Da Phuoc Plant is presented in Figure 3.


Aynexes of Environmental Impact Assessment Report: VietNam urban Upgrading Project - Ho Chi Minh Sub-project

I

Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Figure 1 - Cross sections of sludge landfill applied for Project sludge disposal

LEACHATE 2 COLLECTION SYSTEM

FINAL COVER LAYER p7t DAILY COVER LAYER

SOILD LAYER 0.3 M \> \

i LBP HLM CLU 0.2 I

I , LEACHATE COLLECTION SYSTEM LAYER MUD LAYER 2 M 1

CROSS SECTION OF LANDFILL

Project Management Unit for Ho Chi Mlnh City Urban Upgrading Project (HUUPMU) 1YU


Aqnexes o f Environmental Impact Assessment Report: t

VietNam urban Upgrading Project - Ho Chi Minh Sub-project I

Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Figure 2 - Sludge treatment process of Complex Solid Waste Treatment Plant in Da Phuoc I Reuse: 20%

treatment plant Sludge thicken

+ Mixing & composting

-press

Reuse of large rock&ceramics: 40%

rpi&iq Incineration:

Weighting station

1



ccr

+-I P a v

m- v

' 3mm, 1 Raw solid (300m3/ngd)

- - L a

treatment plant (1800m3/day)

4 4 a

Vibration platform (3mm)

Sludge receiver and classifier 3000m3/ngd Wastewater

Sludge 1200m3/ngd

.......................

h

L a a - a *

j g d

, - - - - - - - - b I

0 0

Hydraulic separator 840m3/day

I I Inorganic sludge Water and organic sludge I I I I

, f i z G G z a G z G E 51

v

I I

Inorganic materials

I

I

Leveling v

I

Separating sludge and

I I 1 I Non- Contaminated Sludge press -

Water tank

1 I t ,d!!d!!E."!'I

1

Watertank 11 II

I 1 water by settling

I contaminated sludge ---------------

MI

4

Annexes of Environmental Impact Assessment Report: VietNam Urban Upgrading Project -Ho Chi Minh Sub-Project Sectorial Project No.4: Improvement of Canal, Embankment and Roads Along Tan Hoa - Lo Gom Canal

Figure 3 - Wastewater treatment technology of Da Phuoc Plant

wastewater Eclt-

1 Sludge-receiving platform I

Leachate from landfill

I Equalization tank I 1 Flocculation tank h

4 Thickener bt e . d Aeration tank

Primary clarifier I

I -#-I & -1 Secondary clarifier I I

-

Disinfection tank I Receiver 1 (TCVN 5945:1005 8)

Sludge m

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HUUPMZT) 192



ANNEX 6.1 - THE RESULTS OF PUBLIC CONSULTATION CONDUCTED BY CEECO - 2009 6.1.1. Community consultation in project area In this stage, the EIA Study's Team undertook a public consultation fiom1212 to 201212009, the schedule is presented in Table 6.2.

Table 6.2 - Public consultation schedule conducted by CEECO

Participation: 40-50 household, representation of local authority

8h-12h Duration time: 2h30'

10 1812

I

1. Local authority introduce participators

2. Environmental consultant describe:

- Summary of SP.04

- Potential negative impact

- Proposed mitigation

Discussion

Conclusion

Contents 1 TT I Place

Statistics of opinions of communities are described as presented in Table 6.3.

Table 6.3 - Results of communities' opinions in project area

Working time

Time Wards

District No. 6

Date

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HU7.JPMU) 193


Questions

-

Answers

1 %

60%

39%

29 %

11%

Ratio Number of beans

1. Have you hear any information of THLG project?

2. What's information that you know?

D i i 6

-

52

38

9

3

c. Project scale.

a. Not Attention.

b. Not Yet.

c. Yes.

a. Project objective

b. The PMU.

Dist. 11

2

92

74

30

3

2

1

53

17

4

11

25 76 52 % -- -

3

197

129

43

17

d. Clearance and compensation 4 4

Tan phu

Total

---

4 12 8 %




4 6 %

54%

28%

32%

23%

17%

44

40

43

42

3 9

25

29

42

37

49

11

11

3. Have you hear any information on the effect of this Project?

4. For these effects as Listed below do you think which one is the most important to your family ?

a. Not Yet.

b. Yes.

a. Minimize flooding situation in the residential area, contributing to improving the living condition.

b. Living environment is improved through the improvement of canals, landscape and roads along THLG Canal

c. The partly compensation is the opportunity to renew house.

d. Improve living and environmental conditions for communities with low incomes through the resettlement and compensation.

54

3

26

0

73

0

6

1

76

0

7

4

80

0

3

76

92

67

78

73

5 1

60

2

11

3

78

0

1

7

75

0

0

3

69

0

1

5. Project's construction will cause bad affections on environment (such as, emission gas, noise, dust...), social security communicate and traffic safety. However, theses affections will ended when the construction of Project is finished, what is your opinion?

6. Constructor must to inform to the quarter and househdds about environment impact, traffic safety may occur when conducting construction activities, what is your opinion?

7. Construction must have the agreement and the approval by the local authority on construction schedule, what is your opinion?

8. Coostructor must implement effective measures to reduce environmental pdlution, increase safety, avoids traffic congestion, what is

149

174

147

169

123

87

a. Agree.

b. Not agree

c. NO comment

k---

d. Other opinion.

a. Very necessary

b. Not necessary.

C- comment.

d. Other opinion.

a. Very necessary

b. Not necessary.

,. No comment.

d. Other opinion.

a. Very necessary

necessary.

c. No comment.

157 271 76%

11

24

4

161

0

9

2

155

0

9

6

156

0

7

7

312

0

16

10

306

0

16

13

305

0

11

2%

92%

0%

5%

3%

91%

0%

5%

4%

92%

0%

3%


9. Project Manager Unit has to supervise on environment, safety and tralf~c during project coastruetion, what is your opinion?

hygiene is very necessary, what is your opinion?

5 1 opinion?.

10. Increasing people's awareness on environmental

11. When enviroamental quality in Living area is improved, the lives of people will be stable, what is your opinioa?

11 d. Other opinion.

a. Very necessary

b. Not necessary.

c. No comment.

d. Other opinion.

112. When project under

16 0

a. Very necessary 68

b. Not necessary. 0

construction, the people should contribute to the monitoring of environmental projects, what is your

5%

62

0

0

5

80 ----

0

d. Other opinion. 1 1 1 1 1 1 6 1 1 8 1 6 % 1

80

0

2

1

I I I

a. Agree. 1 66 1 82 1 150 I 297 1 92% 1

152

0

b. Not necessary. 1 0 1 0 1 1 1 1 l O % l

153

1

8

6

c. No comment.

c. No comment. 1 9 1 2 1 5 1 1 6 1 5 % 1

300

0

2 2

Id. Other opinion. / 2 1 0 1 6 ( 8 1 3 % 1

295

1

10

12

91%

0%

1 a. Very necessary 1 62 1 64 1 144 1 270 1 85% 1

93%

0%

3%

4%

5

b. Not necessary. 1 1 1 0 ( 4 1 1 5 5 % (

c. No comment. 1 6 3 1 1 3 ( 2 2 1 7 % 1

9 3%

I I

6.1.2. Public consultation for religion sites in project area The list of religion sites in project area is presented at previous chapter, all religion sites are interviewed by a questionnaire or by a meeting. The results of the public consultation for religion sites in project area can be concluded as below:

opinioa?

Evaluation of the support of religion manager: Most of religion managers are supporting the THLG project (516 votes), apart of Thao Duong Pagoda chose supporting with condition, and a requesting for granted land were proposed.

Evaluation of the benefits of the Project: All Religion management are highly evaluating the benefits that the project will bring, flood minimizing is most interested.

d. Other opinion.

Concerned negative impacts in constructions: Dust, noise, bad odour.

Expectation of religion manager:

2

+ Thao Duong Thien Tu pagoda (partly remove): o Proposal 1: Adjust the design and minimize impacted land for the pagoda, only

repossess land of pagoda land, not sanctum.

o Proposal 2: Repossess a part of pagoda land, and compensate the land of householders behind the pagoda

o Proposal 3: Move the pagoda wholly and provide other land to re-establish.

o Proposal 4: Rebuild the pagoda with 08 floors on the rest of land after repossessed (about 300 m2).

+ Binh Long Temple (wholly remove): Representative of 1 Binh Long shrine looks forward to compensation hnds and has a other locations to rebuild the temple or getting h n d to search a new position to build the pagoda by themselves.

1



6 9 3%


+ Ngu Hanh Temple (wholly remove): Representative of 1 Ngu Hanh shrine looks forward to compensation funds and has a other locations to rebuild the temple or getting fund to search a new location to rebuild the pagoda by themselves.

6.1.3 Supports Of Community In Order To Maintain Environmental Situation After Improving 1. Not dispose waste into inappropriate places 2. Enhance awareness and roles of self-management groups 3. Encourage environmental protection awareness of community 4. Arise awareness of people on hygienic, public dissemination of environmental protection 5. Establish self-management groups at quarter level, self-manage on environment, hygienic, area

safety 6. Integrate with developments of local campaign (Ex. New culture quarter) 7. Assign the quarter self-management groups to organize collecting and managing solid waste

collecting fee and signing directly contract with solid waste collecting private sectors 8. Establish development activities of cells, groups, clubs, enhance activities of Youth Union in

order to keep on environmental green and clean.

Project Management Unit for Ho Chi Minh City Urban Upgrading Project (HULTPMCT) 196


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