This training report provides an overview of MASS Arıtma Sistemleri İnş. San. Ve Tic. A.Ş., a Turkish company that designs, constructs, and operates water and wastewater treatment plants. The report discusses the company's history and areas of activity. It then describes conventional water and wastewater treatment processes. The main sections of the report cover the design and construction of treatment plants through tender processes. It explains how tenders are announced, the tender documents, instructions for tenderers, and the evaluation process. Design standards and examples of treatment plants constructed by MASS are also presented.

1. 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

2. 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

3. 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]

4.  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].

5. 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].

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]

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]

8. 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.

9. 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]

10.  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.

11. 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

12. 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]

13. 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.

14. 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]

15. 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)

16.  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]

17. 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].

18.  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].

19.  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].

20.  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

21. 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]

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].

23. 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].

24.  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].

25. 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].

26. 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

27. 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]

28. 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)

29. APPENDICES