2009 Standards and Specification

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TOHOPEKALIGA WATERAUTHORITYSTANDARDS,SPECIFICATIONS AND DETAILS

2009EDITION

TOHOPEKALIGA WATERAUTHORITY101 N. CHURCH STREETKISSIMMEE,FL34741-5054

(407)518-2160(407)847-7945


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TOHOPEKALIGA WATER AUTHORITY

STANDARDS, SPECIFICATIONS AND DETAILS

2009 EDITION


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TABLE OF CONTENTS

INTRODUCTION

Page

Document Title.................................................................................................................. IJurisdiction........................................................................................................................ IPurpose........................................................................................................................... IScope............................................................................................................................... I


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PART 1 STANDARDS

DIVISION IGENERAL REQUIREMENTS

Section 10 Definitions

10. 1 Definitions.............................................................................................. 10- 1

Section 11 Plan Review, Approval, Construction and Acceptance of Water and WastewaterImprovements

11. 1 Plans and Specifications............................................................................. 11- 111. 2 Subdivision Related Water, Reuse Water and Wastewater Improvements... 11- 311. 3 Water, Reuse and Wastewater Improvements Associated with

Site Development within the Tohopekaliga Water Authority ServiceArea............................................................................................................. 11- 3

11. 4 Miscellaneous Water, Reuse and Wastewater Improvements..................... 11- 511. 5 Compliance with other Regulatory Requirements...................................... 11- 511. 6 Record Drawings..................................................................................... 11- 611. 7 List of Materials and Approved Manufacturers........................................... 11- 7


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DIVISION IIDESIGN STANDARDS

Section 20 Gravity Sewers

20. 1 General Considerations...................................................................... 20- 120. 2 Design Basis....................................................................................... 20- 2

20. 3 Details of Design and Construction...................................................... 20- 320. 4 Manholes........................................................................................... 20- 420. 5 Service Connections........................................................................... 20- 620. 6 Grease and Oil Interceptors............................................................ 20- 620. 7 Trash Compactor and Dumpster Pad Drain Connections.. 20- 920.8 Materials, Installation and Testing........................................................ 20- 9

Section 21 Wastewater Force Mains

21. 1 General Considerations...................................................................... 21- 121. 2 Design Basis....................................................................................... 21- 121. 3 Details of Design and Construction...................................................... 21- 221. 4 Material, Installation and Testing.......................................................... 21- 521. 5 Location and Identification................................................................... 21- 521. 6 Additional Requirements..................................................................... 21- 5

Section 22 Wastewater Pump Stations

22. 1 General Considerations..................................................................... 22- 122. 2 Design Basis...................................................................................... 22- 122. 3 Details of Design and Construction.................................................... 22- 222. 4 Flow Meters..................................................................................... 22- 522. 5 Emergency Operation....................................................................... 22- 522. 6 Odor Control................................................................................... 22- 522. 7 Telemetry ....................................................................................... 22- 5

Section 23 Water Mains

23. 1 General Considerations.................................................................... 23- 123. 2 Design Basis..................................................................................... 23- 223. 3 Details of Design and Construction.................................................... 23- 223. 4 Water Services and Connections....................................................... 23- 423. 5 Water Metering............................................................................... 23- 523. 6 Material, Installation, and Testing....................................................... 23- 623. 7 Location and Identification................................................................. 23- 623. 8 Cross Connection Control................................................................ 23- 6

Section 24 Reuse Mains

24.1 General Considerations.................................................................... 24- 1

24.2 Details of Design and Construction ................................................... 24- 224.3 Reuse Services and Connections........................................................ 24- 324.4 Reuse Metering................................................................................ 24- 324.5 Material, Installation and Testing......................................................... 24- 424.6 Location and Identification................................................................. 24- 4

Section 25 Special Design Considerations

25.1 Upper Floridian Recharge. 25-125.2 Florida Water Star Program.. 25-1


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PART 2 SPECIFICATIONS

DIVISION IIIGENERAL CONSTRUCTION REQUIREMENTS

Section 30 General

30. 1 Construction. 30- 130. 2 Surveys........................................................................................... 30- 130. 3 Utility Coordination......................................................................... 30- 330. 4 Maintenance of Traffic and Closing of Streets..................................... 30- 430. 5 Protection of Public and Property...................................................... 30- 530. 6 Access to the Public Services............................................................ 30- 630. 7 Public Nuisance............................................................................... 30- 730. 8 Construction Hours......................................................................... 30- 730. 9 Construction in Easements and Rights-of-Way.................................... 30- 730.10 Suspension of Work Due to Weather................................................ 30- 830.11 Use of Chemicals.............................................................................. 30- 830.12 Cooperation with Other Contractors and Forces................................ 30- 930.13 Subsurface Exploration..................................................................... 30- 930.14 Cleaning........................................................................................... 30- 930.15 Salvage............................................................................................. 30- 930.16 Utility Service Interruption................................................................. 30- 930.17 Shop Drawings and Samples............................................................. 30-10

Section 31 Site Preparation, Surface Removal and Restoration

31. 1 General.................................................................................................. 31- 131. 2 Clearing and Grubbing............................................................................ 31- 131. 3 Dust Control.......................................................................................... 31- 231. 4 Surface Removal..................................................................................... 31- 231. 5 Restoration............................................................................................. 31- 2

Section 32 Excavation, Backfill, Compaction and Grading

32. 1 General........................................................................................... 32- 132. 2 Soil Borings and Subsurface Investigations........................................... 32- 132. 3 Existing Utilities................................................................................. 32- 132. 4 Materials.......................................................................................... 32- 132. 5 Sheeting and Bracing in Excavations.................................................... 32- 232. 6 Dewatering, Drainage and Flotation................................................... 32- 332. 7 Excavation........................................................................................ 32- 532. 8 Bedding and Backfill.......................................................................... 32- 632. 9 Compaction..................................................................................... 32- 932.10 Grading........................................................................................... 32-1032.11 Maintenance..................................................................................... 32-10

32.12 Inspection and Quality Assurance....................................................... 32-10

Section 33 Boring and Jacking

33. 1 General............................................................................................ 33- 133. 2 Pipe Material..................................................................................... 33- 133. 3 Pipe Handling.................................................................................... 33- 233. 4 Construction Requirements................................................................ 33- 2


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Section 34 Pressure Pipe Restraint

34. 1 General.............................................................................................. 34- 134. 2 Restrained Joint Construction............................................................... 34- 1

Section 35 Pressure Connection Wet Taps and Linestops

35. 1 General.............................................................................................. 35- 1

35. 2 Tapping Sleeves.................................................................................. 35- 135. 3 Notification and Connection to Existing Mains..................................... 35- 135. 4 Installation........................................................................................... 35- 2

Section 36 Directional Boring

36. 1 General.............................................................................................. 36- 136. 2 Pipe Material ...................................................................................... 36- 136. 3 Pipe Handling ..................................................................................... 36- 236. 4 Construction Requirements ................................................................. 36- 2


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DIVISION IVGRAVITY SEWERS, FORCE MAINS, AND PUMP STATIONS

Section 40 Pipe Material for Gravity Sewers

40. 1 General.............................................................................................. 40- 1

40. 2 Pipe Materials..................................................................................... 40- 140. 3 Joint Materials..................................................................................... 40- 240. 4 Fittings................................................................................................ 40- 240. 5 Inspection and Testing......................................................................... 40- 3

Section 41 Gravity Sewer Pipe Laying, Jointing, and Miscellaneous Construction Details

41. 1 Survey Line and Grade........................................................................ 41- 141. 2 Pipe Preparation and Handling............................................................. 41- 141. 3 Sewer Pipe Laying............................................................................... 41- 141. 4 Trench Preparation and Pipe Bedding................................................... 41- 241. 5 Gravity Pipe and Water Main Separation............................................... 41- 241. 6 Plugs and Connections......................................................................... 41- 241. 7 Pipe Jointing......................................................................................... 41- 2

Section 42 Manholes

42. 1 General................................................................................................ 42- 142. 2 Pre-cast Concrete Sections.................................................................... 42- 142. 3 Castings................................................................................................ 42- 242. 4 Construction Details.............................................................................. 42- 342. 5 Cleaning............................................................................................... 42- 442. 6 Inspection for Acceptance...................................................................... 42- 4

Section 43 Service Laterals

43. 1 General................................................................................................ 43- 1

43. 2 Materials............................................................................................... 43- 143. 3 Construction Details.............................................................................. 43- 143. 4 Termination of Service Laterals.............................................................. 43- 243. 5 Inspection............................................................................................. 43- 243. 6 Restoration, Finishing and Cleanup....................................................... 43- 243. 7 Identification............................................................................................ 43- 2

Section 44 Testing and Inspection for Acceptance of Gravity Sewers

44. 1 General................................................................................................ 44- 144. 2 Testing for Leakage............................................................................... 44- 144. 3 Inspection for Alignment, Deflection and Integrity............................... 44- 2

Section 45 Wastewater Force Mains

45. 1 General................................................................................................ 45- 145. 2 Pipe Inspection and Test........................................................................ 45- 145. 3 PVC Pipe............................................................................................... 45- 145. 4 Ductile Iron Pipe and Fittings................................................................ 45- 245. 5 Polyethylene Pipe................................................................................... 45- 345. 6 Air and Vacuum Release Valves.............................................. 45- 345. 7 Notification and Connection to Existing Mains...................................... 45- 445. 8 Valves.................................................................................................. 45- 445. 9 Valve Boxes......................................................................................... 45- 445.10 Separation of Force Mains and Water Mains or Reuse Mains................ 45- 4


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45.11 Force Main Construction.......................................................................... 45- 445.12 Final cleaning.......................................................................................... 45- 545.13 Hydrostatic Tests..................................................................................... 45- 645.14 Location and Identification....................................................................... 45- 6

Section 46 Wastewater Pump Stations

46. 1 General................................................................................................. 46- 1

46. 2 Wet Well and Valve Slab........................................................................ 46- 146. 3 Access Frames and Covers.................................................................... 46- 146. 4 Pumps and Controls.............................................................................. 46- 146. 5 Piping, Valves and Accessories............................................................... 46- 146. 6 Standby Power Generator System........................................................ 46- 246. 7 Flow Monitoring System........................................................................ 46- 946. 8 Chain Link Fence................................................................................... 46-1146. 9 Odor Control System.. 46-1346.10 Required Submittals.............................................................................. 46-1346.11 Electrical Grounding System.................................................................. 46-1446.12 Inspection and Testing........................................................................... 46-1446.13 Access Road.......................................................................................... 46-15

Section 47 Submersible Wastewater Pumps

47. 1 General................................................................................................. 47- 147. 2 Pump Construction Details..................................................................... 47- 147. 3 Motors.................................................................................................. 47- 347. 4 Pump Control System............................................................................ 47- 447. 5 Shop Painting......................................................................................... 47- 447. 6 Handling................................................................................................ 47- 447. 7 Warranty............................................................................................... 47- 447. 8 Tools and Spare Parts............................................................................ 47- 5

Section 48 Pump Station Electrical Power and Control System

48. 1 General................................................................................................ 48- 1

48. 2 Panel Construction................................................................................ 48- 148. 3 Power Supply and Main Disconnect....................................................... 48- 248. 4 Circuit Breakers..................................................................................... 48- 248. 5 Motor Circuit Protectors........................................................................ 48- 248. 6 Motor Starter and Selector Switches...................................................... 48- 348. 7 Pump Alternator.................................................................................... 48- 348. 8 Lights and Alarms................................................................................... 48- 348. 9 Emergency Power Receptacle............................................................... 48- 448.10 Additional Requirements........................................................................ 48- 448.11 Testing, Service and Warranty............................................................... 48- 6


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DIVISION VWATER DISTRIBUTION

Section 50 Pipe Material for Water Mains and Service Connections

50. 1 General................................................................................................ 50- 150. 2 Pipe Inspection and Testing................................................................... 50- 1

50. 3 PVC Pipe.............................................................................................. 50- 150. 4 Ductile Iron Pipe and Fittings................................................................ 50- 250. 5 Polyethylene Pipe ................................................................................. 50- 350. 6 Service Pipe, Stops, Fittings, and Service Saddles................................. 50- 3

Section 51 Pipe Installation for Water Mains

51. 1 General................................................................................................ 51- 151. 2 Pipe Handling........................................................................................ 51- 151. 3 Separation of Water Mains and Sewers................................................. 51- 151. 4 Trench Preparation and Pipe Bedding................................................... 51- 251. 5 Hydrostatic Tests................................................................................... 51- 451. 6 Disinfection of Water Mains................................................................... 51- 551. 7 Notification and Connection to Existing Mains...................................... 51- 751. 8 Water Service Piping and Connection.................................................... 51- 751. 9 Location and Identification.................................................................... 51- 8

Section 52 Valves, Hydrants and Accessories for Water Mains

52. 1 General................................................................................................ 52- 152. 2 Resilient Wedge Gate Valves................................................................. 52- 152. 3 Valve Installation................................................................................... 52- 152. 4 Valve Boxes......................................................................................... 52- 252. 5 Fire Hydrants....................................................................................... 52- 352. 6 Automatic Flushing Devices. 52- 3


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DIVISION VIREUSE WATER DISTRIBUTION

Section 60 Pipe Material for Reuse Mains and Service Connections

60.1 General............................................................................................. 60- 160.2 Pipe Inspection and Testing................................................................. 60- 1

60.3 PVC Pipe........................................................................................... 60- 160.4 Ductile Iron Pipe and Fittings............................................................... 60- 160.5 Polyethylene Pipe............................................................................... 60- 360.6 Service Pipe, Stops, Fittings, and Service Saddles................................. 60- 3

Section 61 Pipe Installation for Reuse Mains

61.1 General............................................................................................. 61- 161.2 Pipe Handling.................................................................................... 61- 161.3 Separation of Reuse Mains and Sewers.............................................. 61- 161.4 Trench Preparation and Pipe Bedding................................................ 61- 261.5 Hydrostatic Tests............................................................................... 61- 461.6 Disinfection of Reuse Mains............................................................... 61- 561.7 Notification and Connection to Existing Mains..................................... 61- 761.8 Reuse Service Piping and Connection................................................ 61- 761.9 Location and Identification................................................................. 61- 7

Section 62 Valves and Accessories for Reuse Mains

62.1 General........................................................................................... 62- 162.2 Resilient Wedge Gate Valves............................................................. 62- 162.3 Valve Installation............................................................................... 62- 262.4 Valve Boxes...................................................................................... 62- 3


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PART 3 STANDARD CONSTRUCTION DETAILS

DETAIL

TWA-01 Typical Potable Water Service

TWA-01.1 Typical Potable Water and Irrigation ServiceTWA-02 Typical Reuse Water ServiceTWA-03 4 Meter CDR VaultTWA-03.1 6 Meter CDR VaultTWA-03.2 8 Meter CDR VaultTWA-04 Typical Cul-De-Sac Water/Reuse PipingTWA-05 Sanitary Sewer Lateral DetailsTWA-06 Sanitary Cleanout DetailTWA-07 Standard Manhole DetailTWA-08 Miscellaneous Manhole DetailsTWA-09 Drop or Force Main Connection to ManholeTWA-10 Sand and Mud TrapTWA-11 Oil InterceptorTWA-12 Grease InterceptorTWA-13 Sampling StationTWA-14 Typical Pipe Trench SectionTWA-15 Open Cut DetailTWA-16 Piping ClearancesTWA-17 Valve and Box DetailsTWA-18 Air Release / Vacuum Relief Valve and Vault DetailTWA-19 Thrust Restraint DetailsTWA-20 Restrained Joint TableTWA-21 Jack and Bore DetailTWA-22 Water Service Meter/Backflow AssemblyTWA-23 Hydro-Guard Automatic Flushing DeviceTWA-23.1 Blow-offTWA-24 Fire Hydrant Details

TWA-25 Monitoring Well (Shallow)TWA-26 Dirt Road Manhole ProtectorTWA-27 Bollard DetailTWA-28 Water, Sewer, Reuse Service LocationTWA-29 Temporary Jumper ConnectionTWA-30 Duplex Lift Station DetailTWA-31 Duplex Lift Station Control Panel SchematicTWA-32 Duplex Lift Station MOSCAD SchematicTWA-33 Project Information Sheet


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INTRODUCTION


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INTRODUCTION

DOCUMENT TITLE

The title of this document is "TOHOPEKALIGA WATER AUTHORITY STANDARDS,SPECIFICATIONS, AND DETAILS".

JURISDICTION

This MANUAL shall apply to all proposed water, wastewater and reuse mains to be owned,operated by or connected to TOHOPEKALIGA WATER AUTHORITY. In addition, otherpermitting and regulatory agencies may have jurisdiction, and regulations, which supplement orsupplant the requirements outlined in this manual.

PURPOSE

These standards and specifications are adopted to establish minimum acceptable standards forthe design and construction of water and reuse water distribution and transmission facilities andwastewater collection and transmission facilities within the Tohopekaliga Water Authorityservice area. Such facilities include water mains, reuse mains, gravity sewers, wastewater forcemains, wastewater pump stations, and miscellaneous related appurtenances associated withsuch systems.

SCOPE

This Document is divided into three parts. Part 1 - Standards includes Divisions I and II.Division I presents general requirements governing review and approval of plans, andconstruction inspection and acceptance. Division II presents design standards for wastewater,reuse and water main facilities.

Part 2 of this document, Specifications, includes Division III, IV, V and VI. These four Divisions

contain detailed technical specifications governing construction of water, reuse and wastewatermain facilities within the Tohopekaliga Water Authority service area.

Part 3 of this document is Standard Details. This part contains drawings showing standarddetails associated with the installation of wastewater, water main and reuse main facilities.

Private systems shall conform to the following tests and inspections.

1. Grease traps2. Backflow preventer3. Manhole inspections4. Gravity Sewer low air pressure tests

5. Water Main, Reuse Main and Force Main Pressure tests, certified by designengineer.6. Lift Station Hydraulic start up report.


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PART 1 STANDARDS

DIVISION I

GENERAL REQUIREMENTS


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SECTION 10DEFINITIONS

10. 1 DEFINITIONS

Except where specific definitions are used within a specific section, the followingterms, phrases, words, and their derivation shall have the meaning given herein

when consistent with the context. Words used in the present tense include thefuture tense, words in the plural number include the singular number and wordsin the singular number include the plural number. The word "shall" is mandatory,and the word "may" is permissive.

AASHTO - means American Association of State Highway and TransportationOfficials. Any reference to AASHTO standards shall be taken to mean the mostrecently published revision unless otherwise specified.

ANSI - means American National Standards Institute. Any reference to ANSIstandards shall be taken to mean the most recently published revision unless

otherwise specified.

ASTM - means American Society for Testing Materials. Any reference to ASTMstandards shall be taken to mean the most recently published revision unlessotherwise specified.

AWWA - means American Water Works Association. Any reference to AWWAStandards shall be taken to mean the most recently published revision unlessotherwise specified.

CITY - means the City of Kissimmee City Commission, City of Kissimmee,

Florida, and/or its designated representative(s).

CITY OF KISSIMMEE - means City of Kissimmee, Florida.

CONTRACTOR - means the person, firm, or corporation with whom the contractfor work has been made by the Owner, the Developer or TWA, holding anunderground Contractors license issued in the State of Florida.

DEVELOPER - means the person, firm, or corporation engaged in developing orimproving real estate for use or occupancy.

DEVELOPER'S ENGINEER - means an engineer or engineering firm registeredwith the State of Florida Department of Professional Regulation, retained by theDEVELOPER to provide professional engineering services for a project.

DIPRA - means Ductile Iron Pipe Research Association.

DIRECTOR - means the Executive Director of the Tohopekaliga Water Authority,acting directly or through an assistant or other representative authorized by him.


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DRAWINGS - means engineering drawings prepared by an ENGINEER to showthe proposed construction.

DRI Development of Regional Impact.

ELECTRICAL ENGINEER means an electrical engineer or engineering firmregistered with the State of Florida Department of Professional Regulation.

ENGINEER - means an engineer or engineering firm registered with the State ofFlorida Department of Professional Regulation.

FDOT - means the Department of Transportation, State of Florida.

GEOTECHNICAL/SOILS ENGINEER - means a Registered Florida Engineerwho provides services related to terrain evaluation and site selection, subsurfaceexploration and sampling, determination of soil and rock properties, foundationengineering, settlement and seepage analysis, design of earth and earthretaining structures, the design of subsurface drainage systems and the

improvement of soil properties and foundation conditions, and testing andevaluation of construction materials.

MANUAL - means this Tohopekaliga Water Authority Standards, Specificationsand Details.

MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES - means the UnitedStates Department of Transportation Manual on Traffic Control Devices, latestedition.

NEMA - means National Electrical Manufacturers Association. Any reference to

NEMA Standards shall be taken to mean the most recently published revisionunless otherwise specified.

NSF - means National Sanitation Test Laboratory Foundation. Any reference toNSF Standards shall be taken to mean the most recently published revisionunless otherwise specified.

OSHA - means the Federal Occupational Safety and Health Administration.

OWNER - means the person, firm, corporation, or governmental unit holding rightof possession of the real estate upon which construction is to take place.

PLANS - means DRAWINGS as defined herein above.

REUSE MAINS - means effluent/reuse water transmission mains, distributionmains, pipes, fittings, valves, services, meters and miscellaneous relatedappurtenances.

STANDARDS - means the minimum design standards contained in Part 1 of theMANUAL.


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STANDARD DRAWINGS - means the detailed drawings in Part 3 of thisMANUAL related to water, reuse and wastewater main materials and installation.

STANDARD SPECIFICATIONS - means the Department of Transportation, Stateof Florida, Standard Specification for Road and Bridge Construction, latestedition.

SUBDIVISION REGULATIONS - means the City of Kissimmee Subdivision LandDevelopment Code, latest edition.

TOHOPEKALIGA WATER AUTHORITY - means the independent specialdistrict, established and created pursuant to Chapter 189, Florida Statutes, by theFlorida Legislature as a special purpose government body, corporate and politic,authorized to do business in the State of Florida.

TOHO WATER AUTHORITY - means the Tohopekaliga Water Authority.

TRAFFIC CONTROL AND SAFE PRACTICES MANUAL - means the State ofFlorida Department of Transportation Manual on Traffic Control and SafePractices for Street and Highway Construction, Maintenance and UtilityOperation, latest edition.

TWA - means the Tohopekaliga Water Authority

UTILITY ACCOMMODATION GUIDE - means the State of Florida Department ofTransportation Utility Accommodation Guide, latest edition.

WATER MAINS - means water transmission mains, distribution mains, pipes,

fittings, valves, hydrants, services, meters and miscellaneous relatedappurtenances.

WASTEWATER MAINS - means wastewater gravity sewers, force mains, pumpstations, fittings, valves, service laterals, and miscellaneous relatedappurtenances.

WORK - means the labor, materials, equipment, supplies, services and otheritems necessary for the execution, completion and fulfillment of the contract.

END OF SECTION 10


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SECTION 11

PLAN REVIEW, APPROVAL, CONSTRUCTION, AND ACCEPTANCE OF WATERAND

WASTEWATER IMPROVEMENTS

11. 1 PLANS AND SPECIFICATIONS

11. 1. 1 GENERAL

Two sets of plans and soil boring reports shall be submitted for reviewand when complete 5 sets shall be submitted for approval. Allsubmitted plans shall be standard size sheet 24" x 36" with title block.Graphic scale(s) shall be provided on each sheet and all lettering shallbe 1/8" or larger to permit photographic reproduction. Submittal ofspecifications is required. All PLANS sheets and the title page ofsubmitted specifications must be signed, sealed and dated by the

DEVELOPER'S ENGINEER. Electrical DRAWINGS for Lift Stationsmust be signed, sealed and dated by the DEVELOPER'SELECTRICAL ENGINEER. The FDEP permits will not be executeduntil plans substantially meet FDEP requirements.

11. 1. 2 MASTER PLAN

Whenever possible, the entire water, reuse and wastewater systemsshall be shown on a single Master Plan sheet. The Master Plan sheetshall indicate the general locations of all mains, manholes, valves,hydrants, services and service laterals with respect to the proposed

development improvements and the existing water, reuse andwastewater systems. Main sizes shall be indicated in the Master Planproject for project build out, and substantiated by modeling.

A Master Utility Plan report shall be submitted for all DRI and/or multi-phased projects.

11. 1. 3 PLAN AND PROFILE

All mains shall be drawn in plan view and profiles shall be required onlarger projects and on smaller projects where substantial conflicts

might occur.

Whenever possible, on-site water, reuse and wastewater systems shallbe shown on the same PLANS sheet. As a minimum, both the planand profile drawings shall include the following information:

a. General information such as north arrow, names of designer andengineer, revision block with dates, graphic scale(s) and sheetnumber.


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11. 1. 5 SCALE

The master plan shall be prepared at a scale not to exceed 1" to200'. Plan and profile sheets shall not exceed a scale of 1" to 50'.Special details shall be of sufficiently large scale to show pertinentconstruction information.

11. 2 SUBDIVISION RELATED WATER, REUSE WATER AND WASTEWATERIMPROVEMENTS

11. 2. 1 GENERAL

This section covers all water, reuse and wastewaterimprovements that are dedicated to the TOHOPEKALIGAWATER AUTHORITY and constructed in compliance with localcodes and ordinances.

11. 2. 2 DESIGN AND PLAN REVIEW

Design of water, reuse water and wastewater improvementsassociated with TOHO WATER AUTHORITY approvedsubdivisions shall be in compliance with the applicable designstandards and the specifications outlined in Divisions III, IV, Vand VI of this MANUAL. PLANS will be reviewed and approvedby the TOHO WATER AUTHORITY as part of the subdivisionreview and approval process. Refer to the applicable subdivisionregulations for other requirements governing plan review andapproval.

11. 2. 3 CONSTRUCTION INSPECTION

Inspection of improvements shall be in accordance with criteriaestablished in this Manual. The designated representative of theTOHO WATER AUTHORITY shall inspect the water, reuse andwastewater improvements to ensure their compliance withrequirements in Divisions II, III, IV, V and VI of this MANUAL.

11. 2. 4 APPROVAL AND ACCEPTANCE

Approval and acceptance of water reuse and wastewater

improvements shall be in accordance with the criteriaestablished in this manual and miscellaneous requirements of all

jurisdictional codes and ordinances.


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11. 3 WATER, REUSE AND WASTEWATER IMPROVEMENTS ASSOCIATEDWITH SITE DEVELOPMENT WITHIN THE TOHOPEKALIGA WATER

AUTHORITY SERVICE AREA

11. 3. 1 GENERAL

All water, reuse water and wastewater improvements that are to

be dedicated to the TOHOPEKALIGA WATER AUTHORITYshall be designed, reviewed, constructed and accepted inaccordance with the criteria established in this manual.

11. 3. 2 DESIGN AND PLAN REVIEW

Design of water, reuse and wastewater improvements shall be incompliance with the design standards in Division II and thespecifications outlined in Divisions III, IV, V and VI of thisMANUAL. PLANS will be reviewed and approved by the

Tohopekaliga Water Authority, Engineering Division.

11. 3. 3 PRECONSTRUCTION MEETING

A Preconstruction meeting with the owner or ownersrepresentative and State of Florida Underground utility licensedcontractor is required to initiate construction. All correspondenceshall be forwarded to the owners representative as identified inthe Preconstruction Meeting.

11. 3. 4 CONSTRUCTION INSPECTION

The DIRECTOR or his designated representative(s) shallperiodically inspect all construction subject to these standardsand specifications. Field as-built drawings shall be madeavailable to the Inspector upon request.

After all required improvements have been installed and tested,the DEVELOPER'S ENGINEER shall submit certification to theTOHOPEKALIGA WATER AUTHORITY that the improvementshave been constructed substantially according to approved plansand specifications and a certification of actual water, wastewater

and reuse construction costs. Non-compliance with approvedplans or specifications and jurisdictional requirements orevidence of faulty materials or workmanship shall be called tothe attention of the DEVELOPER or DEVELOPER'S ENGINEERand if not corrected in an expeditious manner, all work on theproject will be suspended and/or water services withheld.

Additional laboratory tests shall be required when appropriate.


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11. 3. 4. 1 RECORD DRAWING SURVEY AND PRESSURE TEST

A gravity sewer slope survey provided by a surveyorlicensed in THE STATE OF FLORIDA is required to besubmitted and approved by the TWA prior to low air testing,line lamping and constructing pavement, sidewalks,landscaping and other features over the utilities. Pressure

pipe pressure tests and gravity sewer low air pressure testsfor sewers must be completed prior to construction ofpavement, sidewalks, landscaping and other features overthe utilities.

11. 3. 5 MAINTENANCE, MATERIALS, AND WORKMANSHIPWARRANTY BOND

A letter of credit or bond shall be posted by the DEVELOPERand executed by a company authorized to do business in theState of Florida that is satisfactory to the TWA, payable to the

TOHOPEKALIGA WATER AUTHORITY in the amount of ten(10) percent of the certified construction cost of all requiredwater, reuse and wastewater improvements certified to beowned and maintained by the TWA. Such bond shall guaranteemaintenance of all improvements intended to be owned andmaintained by the TWA for a one (1) year period, and thematerials, workmanship and structural integrity of water, reuseand wastewater systems, and miscellaneous related facilities fora one (1) year period, commencing after project has beenaccepted by the Toho Water Authority.

As an alternative to the provision of a surety bond, theDEVELOPER may provide for the deposit of cash in an escrowaccount or a letter of credit acceptable to the TWA.

11. 3. 6 PROJECT ACCEPTANCE CERTIFICATE

After successful completion of all water, reuse water andwastewater improvements, and after receipt of the requireddocuments outlined in Appendix D, page D-2, 3 and 4, the TWAwill accept satisfactory construction of all improvements intendedto be owned and maintained by the TWA. After the one (1) year

Warranty Period and verification by the TWA of satisfactoryperformance of all water and wastewater improvements, theTWA will thereby release the DEVELOPER from furtherresponsibilities. See form in Appendix D.


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11. 4 MISCELLANEOUS WATER, REUSE AND WASTEWATERIMPROVEMENTS

All water, reuse and wastewater improvements constructed which areintended to be owned, operated or maintained by the TOHO WATER

AUTHORITY, shall be designed, reviewed, inspected and accepted in strictcompliance with the criteria established in Section 11.3 hereinabove.

11. 5 COMPLIANCE WITH OTHER REGULATORY REQUIREMENTS

It shall be the responsibility of the DEVELOPER to obtain and comply with allapplicable Federal, State and Local regulatory permits.

11. 6 RECORD DRAWINGS

A. All Record Documents submitted to TOHO WATER AUTHORITY, as partof the project acceptance shall comply with the following requirements:

1. Each sheet of the RECORD DRAWINGS must be signed andsealed by the Engineer of Record. The cover sheet shall be signedand sealed and shall include the following certification statement:

I CERTIFY THAT THESE RECORD DRAWINGS HAVE BEENREVIEWED BY ME OR BY INDIVIDUAL/S UNDER MY DIRECTSUPERVISION AND THAT THESE RECORD DRAWINGSINCORPORATE THE INFORMATION CONTAINED IN THE CERTIFIED

AS-BUILT SURVEY AS OUTLINED IN CHAPTER 61G17 BOARD OFPROFESSIONAL SURVEYORS AND MAPPERS. TO THE BEST OF MYKNOWLEDGE AND BELIEF THESE RECORD DRAWINGS

SUBSTANTIALLY REFLECT ALL WATER, SANITARY SEWER ANDRECLAIM WATER UTILITIES THAT APPLIES, AS CONSTRUCTED.THE ACCURACY OF THESE RECORD DRAWINGS IS RELIANT ONTHE ACCURACY APPLIED BY THE SURVEYOR THAT PREPAREDTHE CERTIFIED AS-BUILT SURVEY.

2. The Record Drawings Certification block should resemble theexample below:

RECORD DRAWINGS (L140 Minimum)

I CERTIFY

Certification Statement (L80 Minimum)

AS-BUILT SURVEY.

Your Printed Name Florida Reg. No. (L80 Minimum) Date:(L80 Minimum)


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3. The CONTRACTOR shall be responsible for recording informationonto the APPROVED PLANS concurrently with the constructionprogress in the field.

4. All drawings shall be tied to the following horizontal and verticalcontrol datum:

A. Horizontal - State Plane, Florida East Zone (901),

Transverse Mercator projection, NAD 1983 (90) Adjusted.B. Vertical NAVD 1988

5 The Section, Township, Range shall be displayed on lower right-hand corner of the cover sheet, as NE T25S R29E.

6. The RECORD DRAWINGS submittal number shall be displayed onthe lower right-hand corner of the cover, such as SUBMITTAL SET

_1_.

7. All privately maintained utilities shall be clearly marked PRIVATE

and the limits of privately maintained areas shown on RECORDDRAWINGS.

8. Record Drawings shall be legibly marked to record actualconstruction.

9. Record Drawings shall show actual location and elevations water,reuse, wastewater piping, fittings and related appurtenances. Allchanges to piping location including horizontal and verticallocations of utilities and appurtenances shall be clearly shown andreferenced to permanent surface improvements or any structure

within 20 of the installation. Record Drawings shall also showactual installed pipe material, class, etc. Pressure pipe locationsand elevations shall be shown at a maximum of 100 intervals withfinished grade also shown at each location.

10. Record Drawings shall clearly show all field changes of dimensionand detail including changes made by field order or by changeorder.

11. Record Drawings shall clearly show all details not on originalcontract drawings but constructed in the field. All equipment and

piping relocation shall be clearly shown. All pump station data andpump curves shall be provided.

12. Location of all manholes, hydrants, valves, and valve boxes shallbe shown at its correct location on Record Drawings.

13. Dimensions between all manholes shall be field verified and shown.The inverts and grade elevation of all manholes shall be shown onthe Record Drawings and Coordinate Asset Table.


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14. Plan and profile are required for all mains. Record Drawings ofplan and profile drawings shall show elevations of all piping at allcrossings and borings.

15. Record Drawings shall be submitted with changes conforming to allitems in this section noted on the approved plans.

16. Construction Plans simply stamped RECORD DRAWINGS andlacking information requested in Section 11.6, will be returned tothe OWNER/DEVELOPER. The Project Acceptance Certificate willnot be issued until correct RECORD DRAWINGS and all supportinformation have been submitted and approved.

B. RECORD DRAWING deliverables:

1. Deliver one set of certified, full size, hard copy of RECORDDRAWINGS, based on as-built information provided by a Florida

Registered Surveyor and Mapper (PSM).

2. Deliver digital RECORD DRAWINGS in all the following formats:

a. AutoCAD (dwg) format. Include all associated files and xrefs.b. Adobe Protected Document File (pdf) format.c. Tagged Information File (tif) format.

C. COORDINATE ASSET TABLE (Appendix J).

1. Horizontal locations and vertical elevations shall be per Minimum

RECORD DRAWING Accuracies per Asset (Water, Wastewater,Reclaimed Water and Existing). See Appendix I

2. Deliver one certified hard copy of COORDINATE ASSET TABLEsigned and sealed, on each page, by a Florida Registered Surveyorand Mapper (PSM). See Appendix J.

3. Deliver electronic database of COORDINATE ASSET TABLE.

D. SPECIFIC PURPOSE SURVEY for water, sanitary sewer or reuse pipingand appurtenant facilities.

1. If water, sanitary sewer or reuse piping and appurtenant facilities,are not constructed within a dedicated right of way, platted tract orexisting easement, a SPECIFIC PURPOSE SURVEY shall berequired and included in the conveyance document.

2. The SPECIFIC PURPOSE SURVEY shall be a survey, map andreport certified by a Florida Registered Surveyor and Mapper(PSM) of an easement with water, wastewater and/or reclaimed


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water pipes maintained by Toho Water Authority. The report shallbe required if the locations where the pipe centerline was notconstructed within two feet of the centerline of the easement.

3. Deliver two sets of the certified survey in hard copy and a scannedversion of the hard copy in Adobe Protected Document File (pdf)format.

E. BOUNDARY SURVEY for Pump Stations

1. If new pump station/s are not constructed within a dedicated plattedtract, a BOUNDARY SURVEY shall be required and included in theconveyance document.

2. Deliver two hard copies of the certified survey of the pump stationproperty and a scanned version of the hard copy in Adobe Protected Document File (pdf) format.

F. PROJECT INFORMATION SHEET/S

1. The PROJECT INFORMATION SHEET/S shall be full sized blanksheets in AutoCAD (dwg) format (see Part 3 Standard ConstructionDetails. Detail TWA 33). The PROJECT INFORMATION SHEETshall contain legible scanned copies of:

A. All approved permit pages showing signaturesB. Special Purpose Surveys and Boundary Surveys.C. Recorded EasementsD. Certified Engineers Cost Estimate

E. Signed and sealed Hydraulic CalculationsF. Lift station pump curve data

2. Each sheet/s shall be signed and sealed on the lower right handcorner of each sheet by the Engineer of Record. The PROJECTINFORMATION SHEET/S shall be attached to front sheet of theRECORD DRAWINGS.

G. CONTRACTORS DEMOLITION SHEETS

1. Demo Sheets, showing abandoned or demolished piping and/or

structures shall be added to the PROJECT INFORMATIONSHEETS along with the RECORD DRAWINGS. Lengths of existingpiping and/or structures abandoned or demolished, and the methodused shall be clearly be indicated on the Demo Sheets.


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H. SURVEYORS AS-BUILT SURVEY

1. One full sized hard copy of signed and sealed AS-BUILT SURVEYwith the RECORD DRAWINGS.

11. 7 LIST OF MATERIALS AND APPROVED MANUFACTURERS

A list of Materials and Approved Manufacturers for the various productsspecified in this MANUAL is included in Appendix 'E'. It is the intent of theTOHOPEKALIGA WATER AUTHORITY to review and update Appendix 'E' asappropriate to ensure efficient operation of the services and facilities under the

jurisdiction of this MANUAL. For this purpose, the TWA shall evaluatetechnical submittals from interested manufacturers or suppliers at least onceevery three years.

END OF SECTION 11


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DIVISION II

DESIGN STANDARDS


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width per the Typical Pipe Trench Section detail and additionalarea for spoils, the width of the easement can be calculated. If agravity sewer is located immediately adjacent to a road right-of-way, the easement shall be a minimum of of the table value.No gravity sewers shall be placed under retention ponds, tenniscourts, dumpster pads or other structures. In general, gravitysewers shall not be located along side or rear lot lines.

Placement of a gravity sewer along side or rear lot line may beallowed on a case by case basis if such a sewer configurationresults in efficient placement and utilization of the sewer system.These criteria shall also apply to sewer placement in retentionpond berms. In general, no manholes shall be placed along sideor rear lot lines. Manholes shall be designed to be accessible.

20.2 DESIGN BASIS

20. 2. 1 DESIGN LAYOUT

Gravity sewers shall be designed to minimize the number ofpump stations and maximize the gravity sewer slope. Multi-phased projects shall submit a master plan incorporating allphases. Layouts shall also consider servicing off site propertiesas directed by TWA staff.

20. 2. 2 AVERAGE DAILY FLOW

The gravity sewer design shall be based on full ultimatedevelopment as known, or projected. Average daily wastewaterflow shall be calculated by the current TWA (FKA City of

Kissimmee), Flow Rate Ordinance as outlined in Appendix A.

20. 2. 3 PEAK DESIGN FLOW

Gravity sewers shall be designed on the basis of ultimatedevelopment maximum rates of flow, which shall be the productof selected peak factors times the accumulative average dailyflow as calculated above. In general, the following minimumpeak factors shall be applicable for the range of average dailyflow rates.

Flow RangeMinimum

Peak Factor

Flows to 100,000 GPD 4.0100,000 GPD to 250,000 GPD 3.5250,000 GPD to 1,000,000 GPD 3.0Flows greater than 1,000,000 GPD 2.5


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For design average daily flows above 2,000,000 GPD, peakingfactors less than 2.5 may be considered if substantiated byextensive data. Under no circumstances shall peaking factorsless than 2.0 be allowed.

20. 2. 4 DESIGN CALCULATIONS

DEVELOPER'S ENGINEER shall submit signed, sealed anddated design calculations with the PLANS for all sewer projects.Calculations shall show that sewers will have sufficient hydrauliccapacity to transport all design flows.

20.3 DETAILS OF DESIGN AND CONSTRUCTION

20. 3. 1 MINIMUM SIZE

No gravity sewer main conveying wastewater shall be less than8 inches in diameter.

20. 3. 2 MINIMUM COVER

The minimum cover over gravity sewers shall be no less than 36in City and FDOT right-of-ways and easements and 42 inexisting Osceola County rights-of-ways, calculated from thefinished grade. Exceptions to this requirement may be made fora short length of pipe where structural considerations areincorporated in the design.

20. 3. 3 DEPTH

Pump Station inverts may be required at depths of 18 or greaterif necessary to provide pipe slopes to maintain adequatevelocities. PVC piping with less than 15 of cover shall beSDR35, 15 to 20 shall be SDR-26, and 20 to 30 shall be DR18.

20. 3. 4 SLOPE

All sewers shall be designed and constructed to provide aminimum velocity of not less than 2.0 feet per second with a

Mannings N factor of 0.012 at peak flow.

The requirement will be waived for 8 inch sanitary sewers if eachof the following conditions applies:

1. Site constraints do not allow slope construction to maintainvelocity of 2 ft/sec.


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2. Less than 100 single family homes connect to the sewer orfor non-single family home development, less than 110,000gpd peak flow is discharged to the sewer.

The following table defines the minimum slope for 8 inch pipe tomaintain 2 ft/sec velocity and the minimum allowable slopemeeting the waiver requirements.

8 inch SewerNumber of

Single FamilyHomes

Peak Flow(gpd)

Minimum Slope toachieve 2.0 ft/

per 100 ft

Minimum AllowableSlope in the Event of

Site Constraints0-75 0-82,800 0.70 0.55%76-85 82,801-93,840 0.65 0.55%

86-100 93,841-110,400 0.55 0.50%

Over 100 Over 110,401 0.40 0.40%

Minimum Slope in Feet; pipe diameter greater than 8 inches

Sewer Size Per 100 Feet10 inch 0.24

12 inch 0.1915 inch 0.1518 inch 0.1121 inch 0.0924 inch 0.0827 inch 0.0730 inch 0.0636 inch 0.05

Sewers shall be laid with uniform slope between manholes, andfrom manhole to manhole, sewers will be laid with uniform slopes

as much as possible. Sewer drop connections are generally notallowed and must be approved on a case-by-case basis.

20. 3. 5 SIZE

Size conversion between manholes shall not be allowed.

20. 3. 6 ADDITIONAL REQUIREMENTS

Main pool drains and storm drain systems shall not connect tothe gravity sewer system.

Leachate drains and pool filter backwash drains shall beconnected to the sanitary sewer system.

All sewer extensions for future connections shall terminate at amanhole.


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20. 4 MANHOLES

20. 4. 1 LOCATION

Manholes shall be installed at the end of each gravity sewer; atall changes in grade, size or alignment; at all sewerintersections; and at distances not greater than 400 feet. Private

sewer systems must be separated from the TWA sewer systemby a manhole located at the right-of-way line or dedicatedeasement line.

20. 4. 2 DIAMETER

For sewers 24 inches in diameter and smaller, the minimuminside diameter of manholes shall be 48 inches. For sewersgreater than 24 inches and up to 36 inches, the minimum insidediameter shall be 60 inches. For sewers larger than 36 inches indiameter, a 72 inch inside diameter manhole shall be provided.

Minimum manhole inside diameter shall be 48 inches for up to12 feet deep, 60 inches for up to 18 feet deep, 72 inches forgreater depths. Manholes with drop connections shall have aminimum inside diameter of 60.

A minimum overall access opening diameter of 36 inches shallbe provided.

Access cover shall be double cover style; center access covershall be 20" minimum diameter.

20. 4. 3 FLOW CHANNEL

The flow channel through manholes shall be made to conform inshape and slope to that of the sewers. Flow direction changes inexcess of 90 degrees shall not be included in sewer alignmentswithout special consideration. When directional changesexceeding 45 degrees occur, an additional flow line elevationdrop of 0.1 foot across manholes shall be provided. Benchingshall be provided which shall have a minimum slope of 2 inchesper foot. At all changes in pipe sizes, the crown elevations of the

pipes shall match. Where the difference in elevation betweenthe incoming sewer invert and the manhole invert is less than 24inches, the manhole invert shall be filleted to prevent solidsdeposition.


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20. 4. 4 MATERIALS

Manholes shall be constructed of precast units as specified inSection 42. Brick manholes shall not be permitted. Cast-in-placemanholes may be accepted on a case-by-case basis for conflictresolution.

20. 4. 5 COATINGS

Exterior: unless otherwise specified, the exterior surfaces ofmanholes shall not require coatings.

Interior: gravity manholes shall receive 1 coat of red and 1 coatof gray water-based epoxy. Manholes and Lift Station junctionmanholes that have drop connections or that receive thedischarge of a force main and manholes that are within 400 ofthe discharge MH shall require a wet well lining system.

20. 4. 6 CASTINGS

Cast iron frames and covers shall be as specified in Section42.3. Bolt down and/or gasketed covers shall be provided wheremanholes are allowed by the TWA to be located in areas subjectto ponding or flooding.

20. 4. 7 ACCESS

A 12 foot wide access road shall be provided for all manholes,which are located outside of roadways. The top 8" inches of the

access road shall be stabilized to a Florida Bearing value of 50psi, and compacted to 95% of AASHTO T-180.

20. 5 SERVICE CONNECTIONS

20. 5. 1 GENERAL

Service connection shall be through a lateral and miscellaneousappurtenances, as shown on the STANDARD DETAILS, toconnect the gravity sewer to the house or establishment served.

20. 5. 2 SIZE AND LENGTH

Service laterals and fittings shall be a minimum of 6 inches indiameter. Service laterals shall generally be less than 100 feet inlength.


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20. 5. 3 SLOPE

Service laterals shall have a minimum slope of 1%.

20. 5. 4 CONNECTION

In general, service laterals shall be allowed to discharge into

sanitary manholes at crown elevation only.

20. 6 GREASE AND OIL INTERCEPTORS

20. 6. 1 GENERAL

All grease and oil interceptors shall conform to the latest editionof the Florida Building Code and the Florida D.O.T. DesignStandards.

All Food Preparation/Service Establishments shall generally

have grease interceptors sized as discussed herein. Allwastewater flow from the kitchen areas of these establishmentsmust flow through approved grease interceptors prior to enteringthe TWA system.

Grease and oil interceptors shall be provided when they arenecessary for the proper handling of wastes containingingredients harmful to the public sewer or sewage treatmentplant or processes.

The minimum grease interceptor size shall be 750 gallons, two-

compartment type, as shown in the STANDARD DETAILS.

Interceptors shall be required for all automobile service/repairestablishments, car wash and car wash structures, gasolineservice stations, businesses or industries that use petroleumbased, metal or sand products in their day to day activities,where a hazard exists, or where oils or other flammables can beintroduced or admitted into the sewer system by accident orotherwise.

The minimum oil interceptor size shall be 750 gallons, two-

compartment type with vent as shown in the STANDARDDETAILS.

All grease and oil interceptors shall be provided with anapproved sampling station located downstream of the interceptorand prior to connection with human waste lines. Greaseinterceptors shall have clean outs with two-way tees in the inletand discharge lines.


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The owner shall be responsible for proper and regularmaintenance. The owner shall provide ingress and egress to theTWA for periodic inspection of the industrial waste system.

All grease traps shall be designed to conform to the capacityrequirements of the following table:

SIZING FORMULAFOR RESTAURANTS:

OTHER ESTABLISHMENTSWITH COMMERCIAL KITCHENS:

(S) X (GS) X (HR/12) X (LF) = Effective capacityof grease interceptorin gallons

Where:S = Number of Seats in dining areaGS = Gallons of waste water per seat (use 25

gallons for restaurants with china dishes and/orautomatic dishwasher)

(use 10 gallons for restaurants with paper orbaskets and no dishwashers)HR = Number of hours restaurant is openLF = Loading Factor (use 2.00 interstate highway;

1.50 other freeways; 1.25 recreational area;1.00 main highway; 0.75 other highway)

(M) x (GM) x (LF) = Effective capacity of greaseinterceptor in gallons

Where:M = Meals prepared per dayGM = Gallons of waste water per meal (use 5.0 gallons)LF = Loading Factor (use 1.00 with dishwashing

machine and 0.75 without dishwashing machine)

*Source: Florida Plumbing Code

20. 6. 2 LOCATION

Each grease trap or interceptor shall be so located as to provideready accessibility to the cover and means for servicing and

maintaining the structure in working and operating condition..

20. 6. 3 GRIT INTERCEPTORS

Sand and mud traps shall be a minimum of 4' in diameter andconstructed as shown in the STANDARD DETAILS.

20. 6. 4 LAUNDRIES

Commercial laundry and laundromats shall be equipped with linttraps or their interceptors shall have a removal basket, or similar

device, that will prevent strings, rags, buttons, or other materialdetrimental to the sewer system from passing into the TWAwastewater system.

20. 6. 5 HAZARDOUS MATERIALS

Any establishment that uses hazardous material for all or anyportion of its day-to-day operation is required to submit two (2)


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copies of the Materials Safety Data sheet for each hazardousproduct in use on site and two (2) copies of the proposed methodof pre-treatment for review and approval.

In no case shall corrosive liquids, spent acids, or other harmful orhazardous waste which may destroy or injure the sewer system,or which might create noxious or toxic fumes, discharge into the

TWA sewer system without being thoroughly diluted orneutralized by passing through a properly constructed andacceptable dilution or neutralizing device.

Nothing may be discharged into the sanitary system prior toacceptance.

20. 7 TRASH COMPACTOR AND DUMPSTER PAD DRAIN CONNECTIONS

20.7.1 CONNECTION REQUIREMENT

Trash Compactor and Dumpster Pad Drains are to beconnected to the gravity sewer collection system if required bythe State of Florida Building Code.

20.7.2 RELEVANCE

The remainder of this section pertains only to Trash Compactorand Dumpster Pad Drains which connect to the gravity sewercollection system.

20.7.3 GREASE INTERCEPTOR REQUIRED

All Trash Compactor Pad Drains shall be provided with a greaseinterceptor in accordance with section 20.6.

20.7.4 PAD ELEVATION AND AREA GRADING

In order to prevent Stormwater runoff from entering the paddrain, all pads shall be elevated a minimum of 6 above the 100year flood plane and the surrounding area shall be graded tocarry flow away from the pad.

20.8 MATERIALS, INSTALLATION AND TESTING

Applicable provisions of Divisions III, IV and V shall apply.

END OF SECTION 20


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SECTION 21

WASTEWATER FORCE MAINS

21. 1 GENERAL CONSIDERATIONS

21. 1 .1 DESIGN PERIOD

Force main systems shall be designed for the estimated ultimatetributary population, as delineated by the TOHO WATER

AUTHORITY.

21. 1. 2 LOCATION

Force mains shall be located in dedicated rights-of-way or utilityeasements. When installed in rights-of-way, force mains shallmaintain a consistent alignment with respect to the centerline ofthe road. Force mains shall not be located within 10 of buildings,

building foundations, or permanent structures. All force mainslocated outside of dedicated rights-of-way shall require aminimum 20-foot easement. Additional easement widths shall beprovided when the pipe size or depth of cover so dictate. UsingOSHA standards (29 CFR PART 1926) for excavations, thewidth of the easement can be calculated. If a force main islocated adjacent to a road right-of-way, a minimum 10-footeasement shall be provided. Additional easement widths shall beprovided if the pipe size or depth of cover so dictates. Forcemains shall not be placed under retention ponds, tennis courts,dumpster pads or other structures. Force mains shall not be

located along side or rear lot lines, unless specifically approved.These criteria shall also apply to force mains in retention pondberms.

21. 1. 3 DEPTH

The minimum cover over force mains shall be no less than 36in City and FDOT right-of-ways and 42 in existing OsceolaCounty rights-of-ways and easements calculated from thefinished grade. Depths outside this range will be approved on acase-by-case basis.

21. 2 DESIGN BASIS

21. 2. 1 AVERAGE DAILY FLOW

Provisions of Section 20.2.2 shall apply.


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21. 2. 2 PEAK DESIGN FLOW

Provisions of Section 22.2.1 shall generally apply. Considerationmust be given to a 2.5 fps minimum velocity and generally 5 fpsmaximum and a compatible head pressure for manifoldedsystems. Velocities above the maximum velocity will be

evaluated on a case-by-case basis.


DESIGN ENGINEER shall submit signed, sealed and dateddesign calculations with the PLANS for all force main projects.Calculations shall show that force mains will have sufficienthydraulic capacity to transport all design flows.

21. 3 DETAILS OF DESIGN AND CONSTRUCTION

21. 3. 1 VELOCITY AND DIAMETER

At design pumping rates, a velocity between 2.5 and generally 5feet per second should be maintained. The acceptable velocityabove the minimum is a function of total frictional head and thehydraulic system and will be approved on a case-by-case basis.The minimum force main diameter shall be 4 inches. Only 4", 6",8", 10", 12", 16", 20", 24", 30", 36", 42", 48" and 54" diameterforce mains shall be approved. The minimum private systemtaps to the TWA system shall be 2 inches with 2 inch resilientwedge gate valve with 2 inch operating nut.

21. 3. 2 DESIGN FRICTION LOSSES

Friction losses through force mains shall include local loses andshall be based on the Hazen and Williams formula. In the use ofHazen and Williams formula, the value for "C" shall be 100.

When initially installed, force mains may have a significantlyhigher "C" factor. The higher "C" Factor should be consideredonly in calculating maximum power requirements and duty cycletime of the motor.

21. 3. 3 DESIGN PRESSURE AND RESTRAINT

The force main and fittings, including all restrained joint fittingsshall be designed to withstand pump operating pressures andpressure surges, but not less than 100 psi.

Only restrained joint devices shall generally be allowed. Thenumber of restrained joints shall be calculated by a professional


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engineer, registered in the State of Florida or shall be inaccordance with the "Restrained Joint Table" in the StandardDetails.

21. 3. 4 TERMINATION

Force mains shall not terminate directly into a gravity sewer line.

Force mains shall enter the gravity sewer system at a drop typeconnection to a manhole as shown on the Standard Details.

21. 3. 5 AIR RELEASE VALVES

Air relief valves shall be provided, as necessary, to prevent airlocking. All such valves shall be clearly delineated on the forcemain plan and profile in the DRAWINGS. The DEVELOPER'SENGINEER shall submit calculations to the TWA justifying thevalve sizing, if requested. See additional requirements in Section45.6.

21. 3. 6 AERIAL CROSSINGS

Structural Support

Support shall be provided for all joints in pipes utilized for aerialcrossings. The supports shall be designed to prevent overturningand settlement.

Expansion Protection

Expansion joints shall be provided as required.

Flood Clearance

For aerial stream crossings, the impact of floodwaters and debrisshall be considered. The bottom of the pipe shall be placed nolower than 1 foot above the 100 year flood elevation.

Pipe Material and Joints

Flanged joints shall be used. Pipe and flange material shall be

ductile iron, minimum class 53. All above ground pipe shall bepainted as specified in Section 45.4.4 for abovegroundwastewater force mains.

Valves

Underground valves shall be provided at both ends of thecrossing so that the section can be isolated for testing or repair.The valves shall be easily accessible and not subject to flooding.


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An air release valve shall be installed at the high point of thecrossing.

Pedestrian Barriers

Appropriate fan-type pedestrian barriers shall be installed at bothends of the crossing to prevent pipe access to the public.

Permits and Requirements of Other Agencies

It shall be the responsibility of the DEVELOPER to obtain allapplicable regulatory permits. When the Aerial Crossing isaccomplished by attachment to a bridge or drainage structure,the DEVELOPER shall meet all requirements of the Agencieswho own or have jurisdiction over such structures.

21. 3. 7 UNDERWATER CROSSINGS

Directional Bore

Use polyethylene pipe as described in articles 36, 45.5, 50.5,and 60.5 of this manual for installation of force mains, potablewater mains and reuse water mains respectively.

Valves

Valves shall be provided at both ends of crossings so that thesection can be isolated for testing or repair. The valves shall beeasily accessible, and not subject to flooding. An air

release/vacuum relief valve shall be installed at the upstreamhigh point of the crossing.

Underground valves shall be provided at both ends of a borecasing or directional bore crossing so that the section can beisolated for testing or repair. The valves shall be easilyaccessible and not subject to flooding.

Permits

It shall be the responsibility of the DEVELOPER to obtain all

applicable regulatory permits.

21. 3. 8 VALVES

Sufficient valves shall be provided on force main systems tofacilitate effective isolation of the pipe system for repairs andmaintenance. On straight runs of force mains, valve spacingshall not exceed 2000 feet. Additional valves shall be provided at


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inlets of fittings where force mains intersect to facilitate isolationof pipe segments.

21.3.9 PIGGING PORTS

Force mains designed for future tributary population shall includepipe pigging ports at the upstream and downstream ends.

Pigging ports shall also be installed at each end of crossings andwill be considered on a case by case basis.

21. 4 MATERIAL, INSTALLATION AND TESTING

Applicable provisions of Divisions III, IV and V shall apply.

21. 5 LOCATION AND IDENTIFICATION

A means for locating and identifying all force mains and valves shall beprovided in accordance with the provisions in Section 45 and the STANDARD

DETAILS.

21. 6 ADDITIONAL REQUIREMENTS

While designing force main systems, consideration shall be given to possiblefuture connecting pumping stations. If applicable, this requirement shall bereviewed with the TWA prior to finalization of the design.

Private force mains may connect to an existing TWA force main with aminimum of a 2 tapping saddle and a 2 resilient wedge gate valve. GreenPolyethylene tubing shall be installed from the tapping valve to the property

line. The private force main shall also have a 2 resilient wedge gate valve atthe property line to denote the end of TWA maintenance responsibility.

END OF SECTION 21


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SECTION 22

WASTEWATER PUMP STATIONS

22. 1 GENERAL CONSIDERATIONS

The design standards outlined in this section apply to wastewater pump

stations discharging a peak flow of 3000 gallons per minute or less. All suchpump stations shall be submersible type stations. For designing pumpstations discharging more than 3000 gallons per minute, the type of pumpstation and the Basis of Design shall be reviewed with the Toho Water

Authority and approval obtained before proceeding with the design.

22. 2 DESIGN BASIS

22. 2. 1. DESIGN FLOWS

Design flow shall be based upon the total ultimate development

flow from all contributory areas to the pump station. The designaverage daily flow shall be computed as outlined in Section20.2.2. The design pumping capability of the station shall bebased upon the peak design flow which shall be calculated bymultiplying the design average flow with the applicable minimumpeaking factors as outlined below:

Design Average Daily FlowMinimum Peaking Factor

for Peak Design FlowFlows to 100,000 GPD 4.0100,000 GPD to 250,000 GPD 3.5

250,000 GPD to 1,000,000 GPD 3.0Flows greater than 1,000,000 GPD 2.5

For design average daily flows above 2,000,000 GPD, peakingfactors less than 2.5 may be considered if substantiated byextensive data. Under no circumstances shall peaking factorsless than 2.0 be allowed.

22. 2. 2. NUMBER OF PUMPS

For pump stations with a peak design flow of 1500 GPM or less,

a minimum of two pump units shall be provided. Where the peakdesign flow exceeds 1500 GPM, three or more units shall beprovided. See Section 22.5 for standby requirements.

22. 2. 3 PUMP AND MOTOR SELECTION

Pump station shall be capable of pumping the peak design flowwith the largest pumping unit out of service. Pumps shall becapable of meeting all system hydraulic conditions without


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overloading the motors. In addition a minimum 5 HP motor shallbe required. Total dynamic head and flow capacity curves shallbe prepared and submitted to the TWA along with the pumpstation plans. Such curves shall be based upon the static headand friction losses outlined in Section 21.3.2 of thesespecifications. Head capacity curves shall verify that the pumpsare operating at peak efficiency and are suitable for the design

flow application. Pump and motor selection and total dynamichead and flow capacity curves shall reflect hydraulic conditionsin cases where receiving force main systems are interconnectedto additional pumping stations.


The DEVELOPERS ENGINEER shall submit signed, sealed anddated calculations for all pump stations. For those impacted by amanifold system, show condition when one pump is operating ineach pump station and condition where new pump station only is

operating. Calculations shall include total dynamic head andpump system curves with copies of manufacturers pump curves,hydraulic analysis of force main system, operating cyclecalculations with wet well sizing, and buoyancy calculations.


22. 3. 1 FLOODING

Wastewater pumping station structures and electrical andmechanical equipment shall be protected from physical damage

by the 100 year flood. Wastewater pumping stations shouldremain fully operational and accessible during the 100 yearflood. Regulations of Local, State and Federal agenciesregarding flood plain obstructions shall be considered. Finishedgrade inside the fenced area shall be a minimum of 6 above the100 year flood plane and the surrounding area shall be graded tocarry flow away from the wastewater pumping station.

22. 3. 2 ACCESSIBILITY

The pumping station shall be readily accessible by maintenance

vehicles during all weather conditions. The access road to thepumping station shall be paved with concrete. The facility shallnot be located in road rights-of-way. Pumping stations adjacentto parking areas shall have a 32 clear area reserved formaintenance vehicles.

In a phased development, a stabilized access road may beaccepted during the initial phase with paving to be accomplishedin the later phase.


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22. 3. 3 BUOYANCY

Buoyancy of the pump station structures shall be considered andadequate provisions shall be made for protection againstflotation. Calculations shall assume saturated ground conditions.

22. 3. 4 PUMP REQUIREMENTS

Submersible wastewater pump stations shall comply with therequirements spelled out in Section 47. Only approved pumpslisted in Appendix E shall be allowed. Submersible pumps andmotors shall be designed specifically for raw sewage use,including totally submerged operation during a portion of eachpumping cycle. Submersible pumps shall be readily removableand replaceable without dewatering the wet well or disconnectingany piping in the wet well.

Pumps shall be capable of handling raw sewage and passingspheres of at least 3 inches in diameter. Pump suction anddischarge openings shall be at least 4 inches in diameter.

22. 3. 5 WET WELL REQUIREMENTS

Wet well shall be minimum 8-foot diameter and shall have aminimum 4.5 foot depth below the inlet invert. Additional depthwill be required if the available storage volume at build outconditions does not meet minimum pumping cycle requirements.The structure shall be designed by an engineer certified by the

State of Florida and shall conform to specifications for Pre-castReinforced Concrete Manhole Sections, ASTM DesignationC478.

Pumping levels shall be set to provide a minimum capacitybetween operational water levels sufficient to allow a minimum offive (5) minutes between successive starts of the pumps, with aminimum pump run time of 2.5 minutes.

Pump-off water levels shall provide complete submergence topreclude pump inlet vortexing, or air binding. High level alarm

shall not exceed the invert elevation of the influent pipe.Minimum level between controls lead to off, lag to lead, and lagto alarm is 6 inches.

The wet well floor shall have a minimum slope of 1 to 1 to thehopper bottom. The horizontal area of the hopper bottom shallbe no greater than necessary for proper installation and functionof the pump inlet.

No interior ladders shall be permitted in the wet well.


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The interior exposed concrete surfaces of the walls and theunderside of the top slab shall be covered by an approved liningsystem.

Only one inlet connection shall be permitted to a wet well.Provide a tee on the inlet, to direct the influent downward.

Pumping stations inlet and outlet piping layouts deviating fromthe standard details shall require a minimum 8 ft diameter wetwell or drawings to scale of all piping, fittings and pumps todemonstrate that interior piping, fittings, pumps may beconstructed in accordance with the standard details.

22. 3. 6 PUMP STATION WATER SYSTEM

All wastewater pump stations shall be provided with a watersystem with adequate capacity and pressure for station washdown and other requirements. The station water system shall be

completely separated from the potable or reuse water supply bymeans of a reduced pressure type backflow preventer or otherTWA approved system.

22. 3. 7 ELECTRICAL EQUIPMENT, POWER SUPPLY AND POWERCORDS

Requirements in Sections 47 and 48 shall apply.

22. 3. 8 CONTROLS

Requirements in Section 48 shall apply.

22. 3. 9 SITE SIZING AND EASEMENT REQUIREMENTS

Pump station sites shall be sized as delineated on the "LiftStation Yard Plan" in the DRAWINGS. The DEVELOPER shalldedicate pump station site by warranty deed or plat to theTOHOPEKALIGA WATER AUTHORITY. Dedicated easementsshall also be required around the site as delineated on the "LiftStation Yard Plan" in the DRAWINGS. In general, the site for thepaved access road shall also be dedicated to the Tohopekaliga

Water Authority by Warranty deed or plat. An exception to thisrequirement may be allowed on a case-by-case basis in the formof an ingress/egress easement for the access road.

22. 3. 10 SITE FENCING

Fencing at the pump station site perimeter shall comply with thetechnical criteria established in Section 46.8. All pump stationsites shall be fenced.


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22. 4 FLOW METERS

All pump stations with a pumping capacity of 1,000 GPM or more shall have aflowmeter. Bypass piping around the flowmeter shall be provided to facilitatemeter maintenance.

22. 5 EMERGENCY OPERATION

All pump stations shall be provided with emergency power receptacles asspecified in Section 48.9. In addition, stand-by emergency generators shall beprovided at all wastewater pumping stations which are at critical points in thesewer system or which have a peak design capacity of 1000 GPM or more.Determination of pump station critical points shall be at the discretion of theTWA. Such stand-by generator facilities shall comply with the requirementsspelled out in Section 46.6. All such generators shall be rated and designed tooperate the pump station under design conditions.

22.6 ODOR CONTROL

An odor control system shall be provided for all pump stations where thecenter of the wet well is within 50 of the nearest habitable structure.

22.7 TELEMETRY

All pump stations must include a remote telemetry unit (RTU) for monitoringand/or controlling functions as stated in section 48.10.13. The RTU shall bepaid for by the DEVELOPER, and furnished and installed by the Toho Water

Authority SCADA department. The cost for the typical two pump RTU is$8,700.00 and the cost for the typical three pump RTU is $9,300.00. The cost

for the telemetry units shall be paid for by the DEVELOPER prior to schedulingthe installation; the installation shall be scheduled with the Toho Water

Authority SCADA department a minimum of 4 weeks prior to start up of thepump station.

END OF SECTION 22


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23. 1. 4 DEPTH

The minimum cover over water mains shall be no less than 36in City and FDOT right-of-ways and 42 in existing OsceolaCounty rights-of-ways and easements, calculated from thefinished grade. Depths outside this range will be approved on acase-by-case basis.

23. 1. 5 SPECIAL CONSIDERATION FOR SINGLE FAMILY HOMES

See section 25.2 for Florida Water Star design requirements.

23. 2 DESIGN BASIS

23. 2. 1 AVERAGE DAILY FLOW AND PEAK FLOWS

Average daily water flow shall be calculated by referencing theflow rates as outlined in Appendix A. Appendix A is subject to

revision from time to time. Maximum daily to average day ratio is1.7 minimum; peak hour to average day ratio is 3.4 minimum.

23. 2. 2 FIRE FLOW REQUIREMENTS

Fire flow requirements shall be determined in accordance withapplicable City or County Fire Department Codes. Where fireflow requirements exceed the anticipated available fire flow fromthe central water system, on-site fire protection system or otherFire Department approved mitigation measures shall be utilized.

A minimum fire flow of 750 gpm shall be used for single familyresidential developments and 1500 gpm for all others. It is thedesigners responsibility to contact the appropriate firedepartment for specific requirements.

23.2.3 A hydraulic model, signed and sealed by a ProfessionalEngineer registered in the State of Florida, shall be submittedidentifying the adequacy of the design to meet peak systemdemands.

23.2.4 Systems shall be designed for a minimum 20 psi during a fire

event and a normal level of service at 40 psi during peak hours.


23. 3. 1 DESIGN PRESSURE AND RESTRAINT

The water main and fittings, including all restrained joint fittingsshall be designed to withstand pump operating pressures andpressure surges, but not less than 150 psi.


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Only restrained joint devices shall be allowed. The number ofrestrained joints shall be calculated by a Professional Engineer,registered in the State of Florida or shall be in accordance withthe "Restrained Joint Table" in the STANDARD DETAILS.

23. 3. 2 DIAMETER

Only 4", 6", 8", 10", 12", 16", 20", 24", 30", 36", 42", 48" and 54"diameter water mains shall be approved. At the end of cul-de-sac areas, a 2 inch looped connection as shown on theSTANDARD DETAILS will be allowed with an automatic flushingdevice to prevent dead ends where dead ends cannot beavoided. As a minimum, 6 looped systems shall be required insingle family residential projects. Where looping of mains is notpractical, 8 mains shall be required, unless detailed calculationsare submitted to substantiate the sufficiency of a smallerdiameter main.

In commercial, industrial, and high density residential areas, 8looped mains, minimum,

2009 Standards and Specification

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Transcript of 2009 Standards and Specification