MASS ARITMA SİSTEMLERİ İNŞ. SAN. VE TİC. A.Ş.

ERENKÖY OFFICE

TRAINING REPORT

MARMARA UNIVERSITY

ENGINEERING FACULTY

DEPARTMENT OF ENVIRONMENTAL

ENGINEERING

DATE : 11.08.2015

STUDENT NAME : NİLGÜN KADAK

TABLE OF CONTENTS

ABOUT COMPANY .......................................................................................................... 1

INTRODUCTION .............................................................................................................. 6

WHY THE WATER/WASTEWATER IS TREATED ................................................... 7

CONVENTIONAL WATER/WASTEWATER TREATMENT PROCESSES ........... 7

Potable Water Treatment .................................................................................... 7

Wastewater Treatment ........................................................................................ 8

DESIGN AND CONSTRUCTION OF TREATMENT PLANTS ................................. 9

TENDER PROCESSES ..................................................................................................... 9

Tender Inquiry Processes ................................................................................... 9

Tender Documents ........................................................................................... 12

General Instructions to Tenderers .................................................................... 13

Tenders Preparation .......................................................................................... 14

Submission Tenders ......................................................................................... 14

Employer’s Requirements ................................................................................ 15

Functional Design Purposal ............................................................................. 15

o Wastewater Design Standards .......................... 16

o German ATV-DVWK Rules and Standards .... 17

Opening and Evaluation of Tenders..................................................................21

o Opening of Tenders .......................................... 21

o Processing of Tenders ...................................... 21

Clarification of Tenders ................................................................................... 21

o Evaluation of Tenders ...................................... 21

o Correction of Errors ......................................... 24

Contract Award ................................................................................................ 25

o Award Criteria .................................................. 25

o Cancellation of the Tenders .............................. 25

REFERENCES ........................................................................................................... 26

APPENDICES.............................................................................................................27

ABOUT COMPANY

MASS Arıtma Sistemleri İnş. San. Ve Tic. A.Ş. is found in 1983.

Right from the beginning aim of the company was to set up an organization

whose goals were to seek perfectionism on all its duties, never to relingush on quality,

always to employ competent and expert staffs and to support them with continous

training to treat every customer with the same enthusiasm for a small equipment supply

and upto large facilities. Following the latest developments in environmental

technologies and further improving them with their experiences, they have reached to a

level that we can take roles in international markets [1].

The main objective of the company was to build up for a perfect structure serving

in all areas of environmental sector from management upto operation, from construction

upto erection, from designing upto production of environmental systems [1].

Today, standing on these strong principles they are looking ahead with self-

confidence and trying to reach even higher targets with determined steps [1].

Certificates possessed by MASS ARITMA SİSTEMLERİ İNŞ. SAN. VE TİC. A.Ş.

TSE-EN-ISO 9000 Quality Management System

~ ISO 9001 Quality Management System Certificate (2004)

TSE-EN-ISO 14000 Environmental Management System

~ ISO 14001 Environmental Management System Certificate (2004)

TSE-EN-OHSAS 18000 Occupational Health and Safety Management

System

~ OHSAS 18001:1999 Occupational Health and Safety Management

System Certificate (2004)

[2]

Fields of Activity

~ Turnkey projects

~ Equipment manufacturing

~ Package plants

~ Operation and maintenance

~ Waste management

MASS Treatment Systems, has finished numerous important domestic and

international projects in the area of environmental engineering such as water supply and

water purification, treatment of industrial waste water, treatment of domestic waste

water, package type chemical and biological treatment units of water and waste water,

production of purifications equipments, pipe lines, networks, reservoirs, water

distribution pump stations, treatment and disposal of solid wastes and operation of the

facilities [3].

Figure [1] : A treatment plant designed,constructed and operated by MASS [3]

During the execution of all projects, engineering, researchs and development,

designs, measurings, constructions, production and supply of equipments, erections,

services and maintenances, environmental quality and waste management, laboratory

service and start up are provided through our own resources [3].

Turnkey projects

MASS builds turn key installations with varying sizes from small

communities up to large cities [4] .

All projects are designed and executed under the supervision of

international consultants with DIN, BS, TSE or equivalent high international

standards [4].

Figure [2] : A treatment plant constructed by MASS as a turnkey project [5]

~ Domestic Wastewater Treatment

In all domestic wastewater treatment plants which are various

sizes and equipped with technological machineries, MASS applies

extended air activated sludge, biofilm, biodisk and membrane processes

with continuous or batch operation or fixed or fluidized bed anaerobic

processes [4].

In order to meet nitrogen, phosphorus, suspended solids and

microbiological standards, nitrification/denitrification, biological or

chemical phosphorus elimination, ozone or UV oxidation, and

ultrafiltration process are utilized [4].

Figure [3] : A domestic treatment plant constructed by MASS [4]

~ Industrial Wastewater Treatment

MASS has compeleted numerous designs and key-turn

constructions of treatment facilities for food, pharmaceutical, textile,

chemical, paper, agro, battery, automotive and other kind of industries

[6].

Among the procedures and technics of treatment applied through

out these facilities there are chemical coagulation, settling, chemical

oxidation, neutralization, flotation, lamella settling and oil removal,

active sludge, sequencing batch reactors, biofiltration, anaerobic

stabilization, activated carbon adsorption, tertiary filtration, sludge

conditioning, sludge drying bed and lagoon and to dewatering of sludge

[6].

Figure [4] : An industrial wastewater treatment plant constructed by MASS [6]

~ Water Supply and Potable Water Treatment

MASS has designed and built water treatment plants for small and

large communities. MASS also supplies custom made and package

plant and equipment to produce water for industrial, commercial

and household uses [7].

As pure water globally becomes scarcer and more precious, the

importance of satisfying the quality demands for various uses of water

becomes more pronounced. The task includes meeting the demands

for public water supply, for household and commercial quality

requirements and preparing water for various industrial uses [7].

Figure [5] : A potable water treatment plant constructed by MASS [7]

Equipment Manufacturing

MASS Arıtma is a leading manufacturer of state-of-the art equipment for

water and wastewater treatment plants [8].

~ Penstocks

~ Screens and screening presses

~ Grit removal equipment

~ Scrapers

~ Aerators

~ Mixers

~ Sludge thickening and dewatering units

~ Pressurized sand filters

~ Hazardous waste containers

~ Sludge digester mixers (Horizontal shafts)

~ Sludge dryer systems [8]

Package Plants

MASS, produces standard compact units which do not require any

operator intervention and work full automatic, high performance and

designed for various waste water treatment applications [9].

Advanced processing technology used for the package units performs

perfectly even in the treatment facilities of the small communities which face

major problems due to fluctuating flow and contamination density and permit

the units to perform according to the standards of today and at the same time

to the changing standards of the futures [9].

~ Biomass-P

~ Biomass-K

~ Biomass-R

~ Biomass-m

~ BioOdor

~ KimPak

~ YagPak

Figure [6] – Figure [7] : BioMASS tanks constructed by MASS [10]

INTRODUCTION

MASS Arıtma Sistemleri İnş. San. Ve Tic. A.Ş. is a bidder company to

tender for turnkey projects about treatment plants and water supply. MASS have

finished lots of important projects in Turkey and abroad since 1983.

My training was in the project and contracting department of MASS and

I have learnt lots of things about tender processes.

Main points learnt throughout the training ;

Introductory book of MASS is reviewed and the works done by MASS up till

today are examined in detail.

It is learnt why the water and wastewater are treated.

It is learnt how the water and wastewater are treated and what the differences of

their processes are.

How the treatment plant tenders are found is learnt.

A current tender document of a wastewater treatment plant is read from

beginning to end.

The contents of tender documents and tender processes are learnt.

The process and hydraulic reports of a potable water treatment plant are read.

The calculations are reviewed in detail.

ATV-DVWK-A 131E design standards are studied and the calculations done

according to these standards are reviewed.

Pump catalogues and their features are searched to get a price quote and to be

used in the treatment plant.

Piping and Instrumentation Diagrams (P&ID) are reviewed and made an

equipment list.

WHY THE WATER/WASTEWATER IS TREATED

Water is an essential part of life not only human but also all living organisms

and their environment. Because of that, water must be treated for continuation of life.

The purpose of water/wastewater treatment is;

~ to remove contaminants present in the water or reduce the concentration of such

contaminants to make the water fit for its desired end-use [11],

~ to remove pathogenic (disease causing) organisms [12],

~ in order to protect the environment and living organisms [12].

CONVENTIONAL WATER/WASTEWATER TREATMENT PROCESSES

Potable Water Treatment is the removal of contaminants from untreated water to

produce drinking water that is pure enough for the most critical of its intended uses,

usually for human consumption [13]. The main processes of potable water treatment

are below;

~ Water intake

~ Aeration

~ Coagulation&Flocculation&Sedimentation

~ Filtration

~ Disinfection

~ Storage [14]

Figure [8] : The main processes of potable water treatment [14]

Wastewater Treatment is a process to convert wastewater into an effluent that can be

either returned to the water cycle with minimal environmental issues or reused [15]. The

main processes of wastewater treatment are below;

~ Wastewater intake

~ Screening

~ Grit and grease removal

~ Primary sedimentation

~ Biological phosphorus removal

~ Aeration

~ Secondary sedimentation

~ Return sludge pumping

~ Excess sludge pumping

Sludge thickening

Sludge dewatering

Sludge storage

~ Exhaust air treatment by biofiltration

~ Disinfection [16]

Figure [9] : The main processes of wastewater treatment [16]

*** Please look at the “Appendices” to see the P&I diagrams of potable water and

wastewater treatment plants.

DESIGN AND CONSTRUCTION OF TREATMENT PLANTS

The company that makes the design,construction and/or operation of treatment

plant is determined by initiating a tender. Tenders are announced by the related

institutions. Potential bidders give an offer and the company that wins the tender is

determined. The successfull bidder is determined according to the different criteria of

the contracting authority. The most important criteria may be “the lowest price” or

“design quality” or any others.

TENDER PROCESSES

Tender Inquiry Processes

Tenders about treatment plant design,construction and/or operation or water

supply notices are announced;

~ in the website of Instrument of Pre-Accession Assistance (IPA- It is a general fund

supporting not only for treatment plant constructions but also other tender types. It is

related with Republic of Turkey Ministry of Environment and Urbanization for the

treatment plant tenders.) to be informed the international tenders.

~ in the website of Public Procurement Authority (PPA) for the domestic tenders.

The website of Instrument of Pre-Accession Assistance (IPA) ;

http://ipa.gov.tr/

The website of Public Procurement Authority (PPA) ;

http://kik.gov.tr/

The website of Electronic Public Procurement Platform (EPPP) ;

https://ekap.kik.gov.tr/EKAP/Default.aspx

To give an example;

~ If the treatment plant tenders are wanted to search in the website of IPA;

Figure [10] : Tender search engine in the website of IPA [17]

The status of tender is selected as”Open” and the type of the tender is

selected as “Works* ”, and so the available treatment plant tenders are reached.

*Works means construction of buildings, roads, railways, highways, airports,

docks, harbours, shipyards, bridges, tunnels, subways, viaducts, sports

facilities, infrastructure, pipelines, communication and energy transmission

lines, dams, power plants, refineries, irrigation facilities, soil reclamation, flood-

prevention and pickling; and installation, manufacture, preparation of site

materials,transportation, completion, large scale - repair, restoration,

landscaping, drilling, demolition, reinforcing and assembly related with the

works stated above and similar construction works [18].

~ If the treatment plant tenders are wanted to seach in the website of PPA, the website

leads to the website of Electronic Public Procurement Platform (EPPP).

Firstly, “Inquiry transactions” section and then “Public tender document

archive” is selected.

Figure[11] : Tender inquiry procedures in the website of EPPP [19]

After that, the type of tender is selected as “Construction” or another type.

Figure [12] : Selection of tender type [20]

Figure [13] : Selection of the publish date of tender [20]

And finally, the date of tender is selected and the tender bulletin

downloads.

A. Tender Documents

The set of tender documents comprise a total of five volumes. Each volume

(except Volume 0) is broken up into several sections as given below [21].

i. Volume 0 = Invitation to Tender

ii. Volume 1 = Bidding and Contractual Documents

a. Instructions to Tenderers

b. Form of Tender

c. Appendix to Tender & Form of Tender Guarantee

d. Form of Contract (Contract Agreement)

e. General Conditions of Contract

f. Particular Conditions of Contract

g. Forms of Securities

Performance Guarantee

Advance Payment Guarantee

Dispute Adjudication Agreement

Declaration of Undertaking

iii. Volume 2 = Employer’s Requirements

a. General Project Requirements

b. Functional Design Purposal

c. Civil Works

d. Mechanical Works

e. Electrical and SCADA Works

f. Instrumentation and Control

g. Operation and Maintenance

h. Project Execution

iv. Volume 3 = Schedules of Guarantees and Prices

a. Schedules of Guarantees

b. Schedules of Prices

c. Schedules of Plant Purposal

v. Volume 4 = Other Information Provided to Tenderers

a. Results of Topographical and Geotechnical Site Surveys and Investigations

b. Tender Drawings

[21]

B. General Instructions to Tenderers

If a tender that is about the design, construction and operation (hereafter,

these are called as “Works”.) of a treatment plant is considered, the following instructions

are must for the tenderers;

~ The Contracting Authority can initiate a tender for only prequalified firms / joint

ventures or for all firms that want to participate the tender [21].

~ The firms/joint ventures deserved to join the tender may not submit more than one

tender [21].

~ The tenderer (bidder) accepts the full conditions of the tender without any restrictions

and must tender for the whole of the Works required by the tender documents. Tenders

are not accepted for part of the Works [21].

~ All tenders received after the deadline for submission specified in accordance with these

instructions are returned unopened to the tenderers. No liability can be accepted by the

Employer for late delivery of tenders. Late tenders are rejected and are not evaluated

[21].

~ No account can be taken of any reservation in the tender as regards the tender dossier;

any reservation may result in the immediate rejection of the tender without further

evaluation [21].

~ Tenderers have to submit the following informations regarding contract implementation

as Technical Purposes ;

Organisation chart of the Works

Binding time schedule and methodology for implementation of the contract

A list of stuff proposed for the execution of the contract, with the CVs of the key

stuff demonstrating the tenderer’s professional capabilities in terms of managing

and executing the Works

A list of plant and equipment available and proposed for execution of the contract

A list of materials and any supplies intended for use in the Works

Tender Design including:

Process design calculations

Hydraulic design calculations for main liquid treatment processes

Drawings

A general plant layout in a scale previously stated

Layout and cross sections of main structures

Piping and Instrumentation (P&I) diagram

Hydraulic profile

Material specifications with respect to “Employer’s Requirements”

Further information (if any)

An environmental management plan

An outline of the quality assurance system(s) to be used

Any other informations

[21]

C. TENDERS PREPARATION

Tender Guarantee

An amount of tender guarantee determined by the contracting authority is given

by the bidder firm/joint venture.

The tender guarantees of unsuccessful tenderers are returned together

with the information letter that the tenderer has been unsuccessful.

The tender guarantee of the successful tenderer is released when the

tenderer has signed the Contract Agreement and provided the requisite

Performance Security. [21]

D. SUBMISSION TENDERS

The contracting authority requires not only original documents but also copies

of the tenders. The original tender and its copies each comprise of an inner envelope

and an outer envelope; both must be sealed [21].

Inner Envelope

Completed Form of Tender

Completed Appendix to Tender

Completed Schedule of Guarantees for each WWTP

Completed Schedule of Prices for each WWTP

Completed Schedule of Plant Proposal for each WWTP

Outer Envelope

Tender Guarantee

Inner Envelope

Tender Documents, Volumes 1 and 2 (as originals only)

Tender Design for Basic Solution

All addenda with letters

Catalogues and other information [21]

E. EMPLOYER’S REQUIREMENTS

Scope of Works is determined according to type of treatment plant and the expectations

of Contractor Authority;

General Project Requirements

Functional Design Proposal

Civil Works

Mechanical Works

Electrical and SCADA Works

Instrumentation and Control

Operation and Maintenance

Project Execution [21]

F. FUNCTIONAL DESIGN PURPOSAL

The design (preliminary and implementation design) takes the following important

aspects into account:

Functionality

Harmony with its neighbourhood

Cost and energy efficiency

Operation and maintenance efficiency

Day and night operation

Health and safety

Aesthetics, site landscaping

Security and access [21]

All pages of all documents in both envelopes must be signed/initialled and stamped

by the tenderer prior to submission. The contracting authority can require the documents

not only in Turkish but also in English, or Turkish and English version together. Moreover,

the documents can be required as hard copy, soft copy or both of them [21].

Wastewater Treatment Design Standards

Treatment plants are generally designed according to the German DWA

(German Association for Water, Wastewater and Waste) design guidelines. In case

the Contractor considers a certain guideline as not being applicable, he has to provide a

detailed justification [21].

If the treatment plant has biological treatment, the design standard ATV-

DVWK A131 (2000) guidelines is applied in general [21].

~ Major Topics of the Design Criteria presented in Tender Document * ~

Treatment processes

Plant Dimensioning & Treatment units

Inlet structures

Internal pumping stations

Fine&Coarse screens

Bypass system

Grit and grease chambers

Distribution chambers

Biological phosphorus removal tanks

Oxidation ditches (Aeration tanks)

Final sedimentation tanks

Disinfection

Intake and discharge chamber

Return sludge pumping station

Excess sludge pumping station

Gravity sludge thickening/Storage

Mechanical sludge thickening

Sludge dewatering unit

Hydraulic design

Architecture and buildings

Admistration building

Operation building

Blower building

Plant extension

The design criteria of treatment plant are provided by the Contractor

Authority. All criteria and ranges for design are written in the tender document.

Design is done according to these directives [21].

Electrical standards

Monitoring standards

Other design standards

Potable water supply

Connection to other public services

Service water supply for wash down

Operation&Maintenance (O&M) equipment requirements

Heating system

Roads and parking

Fencing

Landscaping

Operation vehicles [21]

* This is a symbolic diagram for a wastewater treatment plant. The content of

diagram is changeable according to the type of treatment plant or the

requirements of Contractor Authority.

GERMAN ATV-DVWK RULES AND STANDARDS

ATV-DVWK-A 131E

Dimensioning of Single-Stage Activated Sludge Plants

Scope

The standard applies for wastewater which essentially originates from

households or from plants which serve commercial or agricultural purposes, insofar as

the harmfulness of this wastewater can be reduced by means of biological processes

with the same success as with wastewater from households [22].

Process Description

The activated sludge process is a unit process comprising the biological reactor

(activated sludge tank) with the aeration equipment and the secondary settling tank, both

connected by the return sludge recirculation [22].

The settling behaviour of the activated sludge, characterised by the sludge

volume index (SVI), in combination with the mixed liquor suspended solids

concentration (SSAT), influences the size of the secondary settling tanks and biological

reactors [22].

If the biological reactor has anoxic zones for denitrification (VD), the aerobic

sludge age (tSS,aerob) is defined as the quotient of the dry solid mass of the sludge in the

aerobic part of the biological reactor (VN = VAT – VD) and the daily mass of waste

activated sludge [22].

Biological Reactor

The treatment of the wastewater by the activated sludge process, with regard to

process technology, operating and economic aspects, places the following reqirements

on the biological reactor (aeration tank) ;

- sufficient enrichment of the biomass, measured simplified as the mixed liquor

suspended solids concentration of the activated sludge (SSAT),

- sufficient oxygen transfer to cover the oxygen uptake and its control to match the

different operating and loading conditions,

- sufficient mixing in order to prevent a permanent settling of sludge on the tank

bottom,

- no nuisances caused by odors, aerosols, noise and vibrations.

For nitrogen removal various reactor constructions and operating modes are

possible;

- Pre-anoxic Zone Denitrification Process

Figure [14] : Pre-anoxic zone denitrification process diagram [22]

- Step-feed Denitrification Process

Figure [15] : Step-feed denitrification process diagram [22]

- Simultaneous Denitrification Process

Figure [16] : Simultaneous denitrification process diagram [22]

- Alternating Denitrification Process

Figure [17] : Alternating denitrification process [22]

- Intermittent Denitrification Process

Figure [18] : Intermittent denitrification process [22]

- Post-denitrification Process

Figure [19] : Post-denitrification process [22]

Secondary Settling Tank

Secondary settling tanks have the main task of separating the activated sludge

from the biological treated wastewater [22].

Dimensioning, design and equipping of secondary settling tanks must be carried

out that the following tasks can be met;

- separation of the activated sludge from treated wastewater by settling,

- thickening and removal of the settled activated sludge for recirculation to the

biological reactor (aeration tank),

- intermediate storage of activated sludge which, as a result of increased inflow rates

at stormwater periods (Qww,h), is expelled from the aeration tank.

Procedure of Dimensioning

The dimensioning of activated sludge plants takes place iteratively, as many

factors influence each other mutually. The calculation path is given below;

Figure [20] : Sequence of planning and dimensioning [22]

The settling process in the secondary settling tank is influenced by the

flocculation process in the inlet zone, the hydraulic conditions in the secondary

settling tank, the return sludge ratio and the sludge removal procedure [22].

G. OPENING AND EVALUATION OF TENDERS

Opening of Tenders

The opening and examination of tenders is for the purpose of checking whether

the tenders are complete. The Employer opens the tenders in the presence of tenderers’

representatives, who are chosen to attend by the bidders [21].

At the tender opening, the name of the tenderer is read aloud and both envelopes

of the tender marked as “ORIGINAL” are opened and the total tender price as per

completed Form of Tender, written notifications of alteration and withdrawal, the

presence of the tender guarantee and such other information the Employer may consider

appropriate is announced. In case the outer envelope does not include a valid tender

guarantee, the inner envelope of the tender is not opened and the tender is declared void

[21].

Processing of Tenders

After the public opening of the tenders, no information relating to the

examination, clarification, evaluation or comparison of tenders or recommendations

concerning the award of contract can be disclosed until after the contract has been

awarded [21].

Clarification of Tenders

The Employer reserves the right to ask a tenderer to clarify any part of his tender

that the evaluation committee may consider necessary for the evaluation of the tender.

This may also include breakdowns of lump sum prices. Such requests and the responses

to them must be in writing. No change in the price, content or substance of the tender

shall be sought, offered or permitted, except to correct arithmetical errors discovered by

the Employer’s evaluation committee during tender evaluation [21].

Evaluation of Tenders

The evaluation of tenders that are not rejected as a result of tender opening

follows a three-stage evaluation process of which the purpose is to identify the tenderer

which, for the lowest cost, is most likely to enable the Employer to achieve his

objectives of having a facility that is completed on time, meets the Employer’s

Requirements and is within the budget available [21].

Stage 1 – Examination of Adminstrative Conformity of Tenders

The aim at this stage is to check that tenders comply with the essential

requirements of the tender dossier [21].

The Employer checks that each tender:

~ is administratively compliant

~ has been properly signed

~ includes a correct tender guarantee

~ has complete documentation and information

~ substantially complies with the requirements of these tender

documents . [21]

If a tender does not comply with the requirements, it may be rejected by the

evaluation committee when checking admissibility[21].

Stage 2 – Technical Evaluation of Tenders

The Employer continues to evaluate only those tenders considered substantially

compliant. During technical evaluation of the tenders, the Employer’s evaluation

committee examines in detail all the information supplied by the tenderers and formulate

its judgement based on the “Employer’s Requirements”. Mainly focused points are on

the following ;

~ proposed process is adequate to the given requirements;

~ proposed process contains all units, equipment and hardware;

~ submitted WWTP design drawings show all units and equipment;

~ SCADA system includes the whole plant;

~ technical schedules (cf. Volume 3, Sections 1 & 3) are in line with the

requirements. [21]

The Employer especially check the power and chemical consumption tables to

satisfy itself that the tenderer’s estimates are reasonable [21].

As a result of this step of the evaluation procedure, the committee analyses the

technical conformity of the tenders in relation to the requirements of the tender

documents, classifying them technically compliant or non-compliant [21].

Stage 3 – Financial Evaluation of Tenders

Only administratively and technically compliant tenders are considered for

financial evaluation. In a first step, the evaluation committee checks that the financial

offers contain no arithmetical errors. The financial evaluation then identify the lowest

net Tender Evaluation Sum (TES), which takes into account not only cost for plant

design, construction and operation (for the duration specified by the contracting

authority) as defined in the tender dossier, but also the operating cost over a further

period about 10 years [21].

If the Employer considers that the tenderer has submitted unreasonably low

power or chemical consumptions, or if mistakes or contradictions are detected, he

requests the tenderer for a detailed technical justification, based on international

recognised standards and best practices as applicable, together with supporting

calculations linked to the tenderer’s process and hydraulic calculations and

manufacturer’s specifications of the equipment which is proposed [21].

If the tenderer confirms the value(s) submitted with his tender, but fails to

submit a reasonable technical justification, in the Employer’s sole opinion, for its low

power or chemical consumptions, the tender is rejected [21].

As an example;

If an operational cost is wanted to evaluate for 10 years, TES can be calculated

by using the following formula.

where,

TES Tender Evaluation Sum

CapEx Capital expenditures (net cost) for plant design and construction

OpEx Operating expenditures (net cost) for the first year of plant

operation

CapEx + OpEx Total Tender Price (net cost)

OpExYear 5 Operating expenditures (net cost) for the fifth year of plant

operation as per completed Schedules of Prices

OpEx Year 10

Operating expenditures (net cost) for the tenth year of plant

operation as per completed Schedules of Prices [21]

Correction of Errors

Any errors in the financial offer will be corrected by the evaluation committee

as follows:

Where there is a discrepancy between a unit price and the total amount derived

from the multiplication of the unit price and the quantity, the unit price as quoted

prevails.

Where there is a discrepancy between amounts in figures and in words, the

amount in words prevails. [21]

The amount stated in the “Form of Tender” is adjusted by the evaluation committee in

the event of any errors, and the tenderer is bound by that adjusted amount [21].

TES = (CapEx + OpEx) + 5 OpEx Year 5

+ 5 OpEx Year 10

H. CONTRACT AWARD

Award Criteria

Among all administratively and technically compliant tenders, the contract is awarded

to the tender with the lowest Tender Evaluation Sum, and compatible with the available budget

[21].

Prior to the expiration of the period of validity of tenders, the Employer notify the

successful tenderer, in writing, that his tender has been selected and draw his attention to any

arithmetical errors corrected during the evaluation process [21].

The successful tenderer is invited for contract negotiations and should be present at the

Employer’s headquarters on a specified date, which cannot be later than 7 days after the receipt

of the Letter of Acceptance. The results of the contract negotiations are summarised in a

Memorandum of Understanding [21].

After the contract has been signed and the Performance Security has been provided by

the successful tenderer, the Employer promptly notify the other tenderers that their tenders have

not been successful and release their tender guarantees [21].

Cancellation of the Tender Procedure

In the event of a tender procedure's cancellation, tenderers are notified by the

Contracting Authority. If the tender procedure is cancelled before the tender opening session,

the sealed envelopes is returned to the tenderers without opening [21].

Cancellation may occur where:

the tender procedure has been unsuccessful, namely where no

qualitatively or financially worthwhile tender has been received or there

has been no response at all;

the economic or technical parameters of the project have been

fundamentally altered;

exceptional circumstances or force majeure render normal execution of

the project impossible;

all technically compliant tenders exceed the financial resources

available;

there have been irregularities in the procedure, in particular where these

have prevented fair competition. [21]

REFERENCES

1. http://www.massaritma.com/en/Kurumsal.asp (31.07.2015)

2. http://www.massaritma.com/en/Yonetim_Calismalari.asp (31.07.2015)

3. http://www.massaritma.com/en/Faaliyet.asp (31.07.2015)

4. http://www.massaritma.com/en/FaaliyetB.asp?ID=2 (31.07.2015)

5. http://www.massaritma.com/en/FaaliyetA.asp?ID=1 (31.07.2015)

6. http://www.massaritma.com/en/FaaliyetB.asp?ID=3 (31.07.2015)

7. http://www.massaritma.com/en/FaaliyetB.asp?ID=4 (31.07.2015)

8. http://www.massaritma.com/en/FaaliyetA.asp?ID=5 (31.07.2015)

9. http://www.massaritma.com/en/FaaliyetA.asp?ID=46 (31.07.2015)

10. http://www.massaritma.com/FaaliyetB.asp?ID=47 (31.07.2015)

11. http://www.eriewatertreatment.com/why-treating-your-water/ (03.08.2015)

12. http://www.cep.unep.org/issues/wastewater.PDF (03.08.2015)

13. https://en.wikipedia.org/wiki/Water_treatment (03.08.2015)

14. http://water.epa.gov/lawsregs/guidance/sdwa/upload/2009_08_28_sdwa_fs_30ann

_treatment_web.pdf (03.08.2015)

15. https://en.wikipedia.org/wiki/Wastewater_treatment (03.08.2015)

16. http://www.watercorporation.com.au/home/search-

results?searchStr=typical%20wastewater%20treatment (03.08.2015)

17. http://ipa.gov.tr/ (29.07.2015)

18. http://www1.ihale.gov.tr/english/4734_English.pdf (30.07.2015)

19. http://ekap.gov.tr/EKAP/Default.aspx (30.07.2015)

20. http://ekap.gov.tr/EKAP/Ilan/BultenIndirme.aspx (30.07.2015)

21. Various Tender Documents provided by MASS

22. German ATV-DVWK Rules and Standards – ATV Standard – ATV-DVWK-A

131E - Dimensioning of Single-Stage Activated Sludge Plants (May 2000)

APPENDICES