ral Reqpdf

PART 3

GENERAL REQUIREMENTS

Volume 2– Employer’s Requirements JICA Assisted Ganga Action Plan Project (Varanasi) under NGRBA Package-3, Design and Construction of 140 MLD Sewage Treatment Plant (STP) at Dinapur, Varanasi including Operation and Maintenance for Ten Years

Section 4: Technical Specifications 3- 2 Bid Document Part 3: General Requirements

Contents

PART 3 ................................................................................................................................................... 5 3.1 Introduction ............................................................................................................................. 5 3.2 Engineer In Charge Requirements .......................................................................................... 6 3.2.1 STP .......................................................................................................................................... 6 3.2.2 Office Furniture ....................................................................................................................... 7 3.2.3 Office Fittings: ......................................................................................................................... 9 3.2.4 Assistance to the Engineer ..................................................................................................... 12 3.2.5 Instruments to be provided .................................................................................................... 12 3.3 Units of Measurement ........................................................................................................... 13 3.4 Photographs ........................................................................................................................... 13 3.5 Erection of Plant ................................................................................................................... 13 3.6 Site Labour and Supervision ................................................................................................. 14 3.7 Temporary Works ................................................................................................................. 14 3.8 Languages ............................................................................................................................. 14 3.9 Drawings and Information to be provided ............................................................................ 14 3.9.1 General .................................................................................................................................. 14 3.9.2 Drawing Format and Numbering ........................................................................................... 15 3.9.3 Pre-contract Drawings ........................................................................................................... 16 3.9.4 Bid Drawings and Details ...................................................................................................... 16 3.9.5 Details of Drawings and Calculations to be submitted by the Contractor for Approval ....... 17 3.9.6 As-Built Drawings ................................................................................................................. 26 3.10 Inspection and Training Requirements ................................................................................. 26 3.11 Operating and Maintenance Manuals ................................................................................... 26 3.11.1 General .................................................................................................................................. 26 3.12 Submission of Documents and Drawings ............................................................................. 28 3.13 Contract Management ........................................................................................................... 29 3.14 Meetings ................................................................................................................................ 30 3.15 Notice of Operations ............................................................................................................. 30 3.16 Protection of Existing Installations ....................................................................................... 31 3.17 Protection of Existing Public and Private Services ............................................................... 31 3.18 Reinstatement and Compensation for Damage to Persons or Property ................................ 31 3.19 Spare Parts ............................................................................................................................ 32 3.20 Special Tools and Appliances ............................................................................................... 32 3.21 Packing and Protection.......................................................................................................... 33 3.22 Quality Assurance ................................................................................................................. 33 3.22.1 Policy ..................................................................................................................................... 33 3.22.2 Objectives .............................................................................................................................. 34 3.22.3 Quality System ...................................................................................................................... 34 3.22.4 Quality Plan ........................................................................................................................... 34



3.22.5 Quality Control and Type Testing Recommendations Submission ....................................... 35 3.22.6 Quality Control ...................................................................................................................... 35 3.22.7 Standard of workmanship are in accordance with the specifications; ................................... 35 3.22.8 Quality Assurance Methodologies in General ....................................................................... 35 3.22.9 Quality Assurance of the Works on site ................................................................................ 36 3.22.10 Continuing Inspection ........................................................................................................... 36 3.22.11 Quality Assurance of Off-Site Works ................................................................................... 37 3.22.12 Schedule of Quality Assurance Operations ........................................................................... 37 3.22.13 Tests required by Jurisdictional Authorities .......................................................................... 37 3.22.14 Delegation of Powers ............................................................................................................ 38 3.22.15 Quality Assurance Reports .................................................................................................... 38 3.22.16 Quality Feedback ................................................................................................................... 38 3.23 Submittal on Health, Safety and Environment (HSE) Management System ........................ 38 3.23.1 Leadership and Commitment................................................................................................. 38 3.23.2 HSE Objectives for the Contract ........................................................................................... 39 3.23.3 HSE Target for the Contract .................................................................................................. 39 3.23.4 HSE Professionals ................................................................................................................. 39 3.23.5 HSE Communication, warning and safety signs ................................................................... 40 3.23.6 Coverage / Awareness ........................................................................................................... 40 3.23.7 Packing and Protection .......................................................................................................... 40 3.23.8 Communication Links ........................................................................................................... 41 3.23.9 HSE Meeting Programme ...................................................................................................... 41 3.23.10 HSE Promotions and Awareness ........................................................................................... 42 3.23.11 Techniques ............................................................................................................................. 42 3.24 Employee Orientation Programme ........................................................................................ 42 3.24.1 Entry in to confined space, sewer and manhole .................................................................... 43 3.24.2 Hazards .................................................................................................................................. 43 3.24.3 Gases in sewerage system...................................................................................................... 43 3.24.4 Traffic control ........................................................................................................................ 44 3.24.5 Light arrangement at Barricading .......................................................................................... 44 3.24.6 Manhole Safety ...................................................................................................................... 44 3.24.7 Infection ................................................................................................................................. 45 3.24.8 Precautions of pumping stations ............................................................................................ 45 3.24.9 Precautions against electrical shocks ..................................................................................... 46 3.24.10 Equipment .............................................................................................................................. 46 3.24.11 Gas masks .............................................................................................................................. 46 3.24.12 Breathing apparatus ............................................................................................................... 46 3.24.13 Portable lighting equipment................................................................................................... 47 3.24.14 Non sparking tools ................................................................................................................. 47 3.24.15 Portable air blowers ............................................................................................................... 47 3.24.16 Safety Belt ............................................................................................................................. 47



3.24.17 Inhalators ............................................................................................................................... 47 3.24.18 Diver’s Suit ............................................................................................................................ 47 3.24.19 Reactive Safety Practices....................................................................................................... 48 3.25 Safety Practice Programme ................................................................................................... 48 3.25.1 Keeping Records of Injury .................................................................................................... 48 3.25.2 Searching out Hazards ........................................................................................................... 48 3.25.3 Safe Equipment, Working Methods ...................................................................................... 48 3.25.4 Motivation and Training ........................................................................................................ 49 3.25.5 Changing Working Habits ..................................................................................................... 49 3.26 Emergency Response Procedures ......................................................................................... 49 3.26.1 Coverage ................................................................................................................................ 49 3.26.2 Emergency Drills ................................................................................................................... 49



PART 3

GENERAL REQUIREMENTS

3.1 Introduction

This Part sets out the technical requirements that are general to the Contract. Technical Standards and

Regulations Except where otherwise specified, plant, materials and workmanship shall comply with

the requirements of the relevant Indian Standards (hereinafter referred to as IS) issued by the Bureau

of Indian Standards. Other equivalent National or International Standard Specifications such as those

issued by the International Organisation for Standardisation (ISO) or the International Electro-

technical Commission (IEC) may be substituted by the Contractor (so long as they are more stringent

than the equivalent IS) at the sole discretion of the Engineer or as may have been agreed in the

Contract. All standards used shall be the current version.

The electrical installation shall comply with all relevant statutory regulations and standards current at

date of bids, unless otherwise indicated within the Employer’s Requirements. Electrical installations

shall, where relevant, be in accordance with the Indian Standards Code of Practice for Electrical

Wiring Installations IS 732.

All materials, plant and equipment shall be new and all materials and workmanship not fully specified

herein or covered by an approved standard shall be of such kind as is used in first class work and

suitable to the climate in the project area.

Where reference is made in the Specification to a British Standard Specification (hereinafter

abbreviated to `B.S’) issued by the British Standards Institution of 2, Park street, London W.I., or to

an Indian Standard Specification (I.S.) issued by the Bureau of Indian Standards, (earlier known as

Indian Standards Institution), Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110 002, or

American Society for Testing and materials (ASTM) issued by ASTM 1916 Race Street, Philadelphia,

P.A., 19103, U.S.A. or American National Standards Institute (ANSI) issued by ANSI 1430,

Broadway, New York, N.Y., 10018, U.S.A. or Japanese Industrial Standards (JIS) issued by Japanese

Standards Association, 4-1-24, Akasaka, Minato-Ku, Tokyo 107, Japan or to any other equivalent

Standard it shall be to the latest revision of that Standard at the Tender opening date.

The Contractor may propose, at no extra cost to the Employer, the use of any relevant authoritative

internationally recognised Reference Standard, including Indian Standard (IS) and Japanese Industrial

Standards (JIS).

All details, materials and equipment supplied and workmanship performed shall comply with these

Standards. If Tenderer offers equipment to other Standards, the equipment/material should be equal or

superior to those specified and full details of the difference shall be supplied.



In the event of conflict between these Specification and the Codes for equipment, provisions of this

Specification shall govern. Certain specifications issued by national or other widely recognised bodies

are referred to in this Specification. Such specifications shall be defined and referred to hereinafter as

Standard Specifications. In referring to the Standard Specifications the following abbreviations are

used:

IS: Indian Standard

ANSI: American National Standards Institute

API: American Petroleum Institute

ASME: American Society of Mechanical Engineers

ASTM: American Society of Testing and Materials

AWS: American Welding Society

AWWA: American Water Works Association

ISO: International Organisation for Standardisation

JIS: Japanese Industrial Standard

DIN: Deutsches Institute fur Normung

BS: British Standard

JWWA: Japanese Water Works Association

IEC: International Electro technical Commission

IEE: Institution of Electrical Engineers

IEEE: Institute of Electrical and Electronic Engineers

NEMA: National Electrical Manufacturers Association

AGMA: American Gear Manufacturer’s Association

3.2 Engineer In Charge Requirements

The Contractor shall provide the following for use by Engineer In Charge at the proposed plant site

covered under the contract. These items are to be maintained by the Contractor in proper, safe, and

clean working condition throughout the construction period and shall be returned to the Employer after

completion of works. No separate payment shall be made for the items covered here.

3.2.1 STP

A separate office for the sole use of the Engineer in charge , his staff and Consultant shall be provided

by the Contractor at STP site. The Contractor shall provide, erect, furnish, clean, maintain and

subsequently transfer the office and associated furniture/items to the Employer after the completion of

works. The carpet area of the office shall not be less than 100 Sq. Meter.

The walls shall be of 200mm thick solid cement concrete block, plastered and with oil bound

distemper on the inner face and snowcem on the outer face. RCC roofing at 3 metre from floor,

painted with oil bound distemper shall be provided. The doors shall be of first quality wood and steel



windows of approved quality shall be provided. The flooring for the office building shall be minimum

2.5mm thick Vinyl over PCC base. Before commencing the construction of the office, the Contractor

shall submit to the Engineer for his approval a drawing of the proposed building with all architectural

and finishing details fully shown. The location of the office shall be as directed by the Engineer in

charge.

The Engineer In Charge Office shall be ready in all respects within 60 days after Contractor takes

possession of the site. The Office shall be maintained throughout the construction period with office

help staff, power, water, sewerage, and housekeeping. Power, water supply, and sewerage shall be

arranged by the Contractor either with the available resources or from independent sources (e.g. diesel

generator sets, borewells, etc.) at his own cost.

The proposed office building for Employer's Representative's shall meet the following minimum

carpet area requirements:

Sr. No. Room Description Number and Dimensions

(i) Engineer In charge & staff Room 2 Nos., 4m x 4m each with air-conditioner

and attached toilet

(ii) Project Management Consultant Room 1 No., 4m x 4m each with air-conditioner

and attached toilet

(iii) Conference room 8m x 6m each with air-conditioner

(iv) Computer Room 1 No., 3m x 3m with air-conditioner

(v) Record Room 1 No., 3m x 3m

(vi) Toilets with wash basin 2 Nos., 1.5m x 2m each

(vii) Passage of required length 2m wide

3.2.2 Office Furniture

All the operating expenses, water, lights and other charges shall be regarded as an inclusive cost of the

Contractor’s operating costs and part of the contract price.

The equipment, furniture and furnishings shall include:

One conference table 10'-0" x 5'-0" with 12 chairs (approved make)

6 Nos. of 5' x 3' table with both side drawers (3 on each side)

6 Nos. of 4' x 2 ½' table with both side drawers (3 on each side)

2 Nos. of 3' x 2' table with single side three drawers



20 chairs (approved make) excluding chairs for Computer and Conference

2 Nos. of Steel cupboards (Stonewell type or similar approved)

1 No. Drawing Cabinet

Photocopier (Zooming 50 to 200%) with a paper storage desk

Refrigerator (200 litres capacity) of approved make

4 Nos. of 4 Drawers Filing Cabinet

Vertical blinds to all windows

Water supply / Plumbing / Electrical complete

Portable Fire Extinguisher (3 Kg) or as per requirement

Computer Table and Chair – 2 No. each

The specification of the computer is indicative and the latest available specification should be used

with the list as a guideline.

Motherboard Intel 915 GAB Intel Motherboard

Processor Intel 3.0 GHz Pentium 4 Processor w/ Retail Fan/Heatsink

RAM 2048MB RDRAM (dual DRIMMs)

Monitor 19” LCD colour monitor

Video Card Leadtek GeForce 3 Ti-200 w/ 64mb 4.0ns DDR Memory, TV-output

Hard Drive(s) 2 No. Maxtor 120GB 10,200rpm SATA-with necessary RAID controller

System Case Enlight 7237-0X3C4 w/ 340W Power Supply or as per requirement

DVD±RW Drive Double Layer technology 16X DVD+/-RW drive with compatible burning

software

Sound Card Creative Labs Sound Blaster Audigy w/ SB1394 firewire connectivity

Ports In addition to the inbuilt ports, Adequate Numbers for connections of printer, pen drive,

scanner etc. shall be provided.

Speakers Logitech Z560 4.1 4-speaker w/ Subwoofer Combo

Network Card 3com 10/100Mbps (model 905CX-TXNM) w/ 14ft Network Cable

Modem Internal with High speed broad band

Mouse Microsoft Intellimouse Explorer v3.0



Keyboard Microsoft 114-key Standard Keyboard (multimedia compatible)

Pen Drive 512 GB Pen drive with compatible software

Colour Inkjet Printer A3 Colour Inkjet printer

Scanner A3 size scanner with compatible software

Operating System and Related Software:

Pre-loaded licensed operating system, latest Windows XP Professional with recovery CD

Latest licensed Microsoft Office XP Professional suite (Vista), AutoCAD (Same version

which will be used by the contractor to prepare drawings), firewalls and latest Antivirus

software.

High-speed internet connection, security, data base and project management software.

UPS with voltage regulator and battery backup for at least 15 minutes for all the hardware

(Computer, Printer, Scanner, etc) taken together.

Consumables

The configuration is Indicative. The Computer supplied shall be with latest Hardware of approved or

equivalent make and latest versions of Software available at the time of supply.

3.2.3 Office Fittings:

The Office Fittings shall include:

2 No. of 4' – 0" long tube lights in each room except in Conference room and toilet. Toilet with

adequate illumination lights;

6 tube lights 4'-0" long in Conference room;

2 Nos. of normal pendant bulbs of 100 watts in all rooms;

2 Nos. 48" ceiling fan in each room;

3 Nos. of 48" ceiling fan in conference room;

3 Nos Air conditioners of adequate capacity

All rooms with 2 plug points each;

Passage: two lights and one outside;

Heavy duty air coolers for all the other rooms with water and power connection;



1. Lighting Distribution Board

1.1 The Distribution Board shall be of high quality CRCA sheet steel enclosed, suitable

for surface mounting on the wall. Premier quality powder coating shall be applied and

the final shade shall be Light Grey Semi Glossy Shade 631 of IS 5.

1.2 The Distribution Board shall be provided with double door arrangement consisting of

an intermediate plate with necessary windows and a door so that when the door is

opened, live parts are not exposed.

1.3 The Distribution Board shall be provided with removable top and bottom gland plates

with adequate number of knockouts to enable top and bottom entry of conduits and

cables.

1.4 The Distribution Board shall be of phase segregated type.

1.5 The incomer shall be TPN, MCCB of required rating. The sub incomers for each

phase shall be DP, MCB’s of required rating. The outgoings shall be SP MCB’s of

required ratings.

2. Luminaries:

2.1 The luminaries for all office premises shall have the following features :

The Housing made of epoxy powder coated extruded aluminium /

CRCA sheet suitable for suspended /surface mounting/recess

mounting

Decorative low glare mirror optics with anodised aluminium louvers.

Designed for 2x 36 W TL-D lamps with electronic ballast.

Number of luminaries for each room shall be selected to achieve

illumination level of 300 lux.

In addition to the above luminaries, down light with the following

features shall be provided at the four corners of the conference room.

(i) Housing made of Powder Coated CRCA, Sheet steel, suitable for

recess mounting with wide cast aluminium ring.

(ii) Anodised aluminium reflector for low glare and diffused lighting.

(iii) Suitable for horizontally mounted Single 18W CFL with

electronic ballast.

2.2 The luminaries for other rooms & toilets shall have the following features :

Housing made of Powder Coated CRCA Sheet steel, suitable for

surface mounting on ceiling /wall.



Cover made of Opal acrylic.

Designed for 1x 36 W, TL’D’ lamps with electronic ballast.

3. Ceiling Fans

The Ceiling Fan shall be of 48” size, 3 blades type. The fan shall be with

aerodynamically balanced aluminium blades. The fan shall be provided with double

ball bearings precisely aligned for noiseless performance. The fan shall be powder

coated and complete with all mounting accessories. The fan shall be suitable for

operation with electronic fan regulator.

4. Switchboards

The Switchboard shall have unbreakable concealed box and mounting plate flushed

with wall. The mounting plate shall be of twin plate arrangement, inner plate to hold

the modules and the outer cover plate. The switch board shall have required Nos. of

switches for lighting fixtures & Ceiling fans. The switches shall be of modular type

with minimum rating of 6 amperes. Each lighting fixture & Ceiling fan shall be

provided with individual switch. The switchboard shall be provided with one no 6

Amperes 5 pin universal socket with switch. Number of modules in the switchboard

shall be to suit the actual requirement. At least 2 Nos., 6 A switches shall be provided

in each switchboard as spares. The cover plate and switches shall be of white /cream

in colour. Minimum One no Switchboard shall be provided in each of the premises.

5. Switch Sockets

The switch sockets shall have unbreakable concealed boxes and mounting plates

flushed with the wall. The mounting plates shall be of twin plate arrangement, inner

plate to hold the modules and the outer cover plate. Each switch socket shall be

provided with 15 Amps, 240 V, Switch and 6 Pin socket. The number of switch

sockets shall be 2 Nos. in each of the premises and one no in Pantry.

6. Power Plug & Sockets

The power sockets shall have unbreakable concealed boxes and mounting plates

flushed with the wall. The mounting plates shall be of twin plate arrangement, inner

plate to hold the modules and the outer cover plate. Each power socket shall be

provided with 16 Amps, 240 V, SPN MCB and 16 Amps, 240 V, 3 Pin socket and

16A 3 Pin Plug. The number of Power Plug & sockets shall be provided as per

requirement in various premises & pantry.



7. Peripheral Lighting:

Bracket/Conduit mounted Peripheral Lighting shall be provided on all the corners of

the building.

The Lighting fixture shall have the following features

Weather Proof Housing made of Powder Coated CRCA Sheet steel.

Cover made of Opal acrylic.

Designed for 1x 36 W, TL’D’ lamps with electronic ballast.

The Contractor shall arrange for a telephone line with STD facility at proposed STP site covered

under the contract for sole use by Engineer. The Contractor shall pay for the installation charges. A

separate provisional sum is allotted for the payment of calls made by the Engineer. The Contractor

shall transfer the telephone instrument and its ownership to the Employer after completion of works.

3.2.4 Assistance to the Engineer

The Contractor shall provide all necessary assistance to the Engineer and his staff in carrying out their

duties of checking, inspecting, and measuring the Works. The Contractor shall provide, at no

additional cost, chainmen, staff men, office attendants, and labourers as may be needed from time to

time by the Engineer.

The Contractor shall provide for the Engineer and his staff, consultants and their staff and visitors

such protective clothing, safety helmets and rubber boots of suitable sizes, hand lamps and the like as

may be reasonably required by them. These articles shall remain the property of the Contractor. No

extra payment shall be made on this account.

3.2.5 Instruments to be provided

The Contractor shall provide at his own cost for the exclusive use of the staff of the Engineer all brand

new survey equipment and measuring instruments of approved make and of every kind necessary for

the execution of the Works, including

(a) One 360 degree circle optic theodolite, accurate to one second, complete with

carrying case and sliding leg tripod.

(b) Two automatic surveyor’s levels with horizontal 360 degrees circle, tripod with

carrying case.

(c) Two staffs, 4.5 m long, each in 3 sections and with attached bubbles, graduated in

metres and tenth and hundredths of a metre.



(d) Two Surveyor’s steel bands of which one shall be 100 m long and approximately 20

mm wide and one shall be at least 30 m long and approximately 12 mm wide, each

fully divided, complete with tape thermometers and tension handles and wound on an

open plastic cross.

(e) An adequate number of ranging rods, steel and linen tapes, string lines, pegs, lines,

spirit levels, survey umbrellas, lights, batteries, stores and tools.

The instruments mentioned above shall be for exclusive use of the Engineer and shall remain in the

custody of the Engineer till the Works are completed.

The Contractor shall be solely responsible for all such instruments and equipment and shall ensure

that they are at all times in good repair and adjustment, and shall make good any loss or damage

howsoever caused. No extra payment shall be made on this account.

On completion of the Works, the entire set of instruments provided by the Contractor shall be the

property of the Employer.

3.3 Units of Measurement

All designs, drawings, specifications and manuals shall use SI units and all measurements, dimensions

and performance data shall be quoted in those units.

3.4 Photographs

The Contractor shall provide photographs not less than 100 x 150 mm of such portions of the works,

in progress and completed, along with soft copies of the same in CD. Each photograph shall display

date and time on it. Photographs shall be properly referenced and captioned to the approval of the

Engineer. The Photographs shall be two category i.e. Progress Photographs and Records Photographs.

The Contractor shall supply the soft copy and three prints of each progress photograph ordered by the

Engineer. The Contractor shall supply two additional prints of progress photographs selected by the

Engineer for incorporation in albums. The Contractor shall supply two sets of albums, mount the

prints, captioned and title the prints and albums all to the approval of the Engineer.

3.5 Erection of Plant

Erection of Plant shall be phased in such a manner as not to obstruct the work being done by other

contractors. Before commencing any erection work, the Contractor shall check the dimensions of

structures where the various items of Plant are to be installed and shall bring any deviations from the

required positions, lines or dimensions to the notice of the Engineer.



Plant shall be erected in a neat and workmanlike manner on the foundations and at the locations

shown on the Approved Drawings. Unless otherwise directed by the Engineer, the Contractor shall

adhere strictly to the aforesaid drawings.

The Contractor shall be responsible for setting up and erecting the Plant to the line and level required

and shall ensure that all Plant is securely held and remains in correct alignment before, during and

after grouting-in. This responsibility shall not be passed to any other contractor.

Any damage caused by the Contractor during the course of erection to new or existing plant or

building or any part thereto, the Contractor shall at his own cost, make good, repair or replace the

damage, promptly and effectively as approved by the Engineer and to the Engineer's satisfaction.

3.6 Site Labour and Supervision

The Contractor shall provide all the skilled and unskilled labour required, and all necessary tools and

equipment, to erect, test and commission the Works within the period agreed in the programme.

3.7 Temporary Works

Not less than 14 days before commencing any portion of the Works, the Contractor shall submit to the

Engineer for his approval, comprehensive drawings and calculations for all Temporary Works which

the Contractor proposes for the construction of that part of the Works.

Notwithstanding approval by the Engineer of any design for the Temporary Works, the Contractor

shall be entirely responsible for their safety, efficiency, security and maintenance and for all

obligations and risks in regard to such Temporary Works specified or implied in the Contract.

3.8 Languages

All drawings, instructions, signs, notices, name-plates, etc. for use in the design, construction,

operation and maintenance of the Works shall be in English.

All site sign boards and warning signs shall be in Hindi, and English.

3.9 Drawings and Information to be provided

3.9.1 General

The drawings that will be prepared and issued for this Contract shall be classified as follows and

where relevant shall be to a scale which is suitable for the representation of those details illustrated.



The term Drawing shall be deemed to include all drawings, schedules, lists, software documentation,

descriptive text and calculations necessary for the design, construction, operation and maintenance of

the Works and referred to in this clause.

Drawings and all other submittals required during bidding stage and after award of contract shall be

submitted in editable electronic softcopy format on CD(s) or DVD(s) as well as in hardcopy paper

format.

The softcopy format for various items shall be as follows:

Drawings: AutoCAD version 2008 or latest

Text Documents: Microsoft Word version 2007 or latest

All programmes and schedules related to the project: Microsoft Project version 2007 or latest

Spread sheets, calculations, tables, technical schedules, prices schedules, and other numerical

data: Microsoft Excel version 2007 or latest

Databases: Microsoft Access version 2007 or latest

All other required information not included in the above: Adobe Portable Document Format

(PDF) version 10.x

The hardcopy format/sizes for various items shall be as follows:

Drawings: Standard A1 size paper. The scale for each drawing shall be selected such that the

information is presented without any clutter or ambiguity and is clearly and easily legible

without the use of magnifying aids other than a reader’s normal eye-glasses.

All other information: Standard A4 or A3 paper size, except for any pre-printed standard

information such as brochures or catalogue information, which may be submitted in the

original size and format.

3.9.2 Drawing Format and Numbering

All drawings shall be prepared using an identical title block format. This shall be approved by the

Engineer and shall identify the project, drawing title, the Employer, the Contractor, Sub-contractor, if

applicable, and the Engineer.

A formalised drawing numbering system shall be adopted with digits of each number, referencing

location, revision, drawing type and size. The numbering format and allocation of drawing number

blocks shall be approved by the Engineer.

The Contractor shall provide a sequential numbering system for all Construction Documents. The

drawing number shall not be repeated or duplicated.

All drawings shall be submitted to a formalised checking procedure prior to submission. Drawings

not so checked will not be approved.



3.9.3 Pre-contract Drawings

The Pre-contract Drawings are those issued to Bidders either with the Bidding Documents for the

purpose of illustrating and clarifying the Works described in the Employer’s Requirements or later

during the bidding period as part of an Addendum to the Contract Documents.

Such drawings shall be deemed to have been issued for the guidance of Bidders and shall, for the

purpose of executing the Works, be superseded by the Construction Documents.

3.9.4 Bid Drawings and Details

The Bid Drawings are those furnished by a Bidder with his Bid for the purpose of illustrating and

clarifying his proposals.

The following drawings, details and specific information pertaining to the entire sewage treatment

process / plant shall be furnished by the Bidder for each STP in the technical envelope in addition to

other information mentioned elsewhere in the tender.

The lists provided below shall not be considered comprehensive. The bidder shall be responsible for

including any and all drawings and information for any and all works that may be necessary for full

and complete definition or clarification of the design, regardless of whether or not such drawings,

information, or works are explicitly included in the lists below or elsewhere in these bid documents.

The bid drawings and other technical documents shall be submitted in soft copy format on CD(s) or

DVD(s) as well as in hardcopy paper format.

(a) General and Process

(i) Narrative Description of the Works

(ii) Plant Operation and Control Philosophy

(iii) Sizing and Design Calculations covering all Major Unit Processes and components of

the works along with mass balance calculation across each unit

(iv) List of all structures (basins, tanks, channels, buildings, etc.) including dimensions

and freeboards

(v) Complete Equipment List

(vi) Plant Layout

(vii) Hydraulic Profile with hydraulic drop calculation across each unit

(viii) Process Flow Diagram

(ix) Process and Instrumentation Diagrams (P&IDs)

(x) Electrical Load List & Power Consumption Chart

(xi) List of Chemical Consumption on Daily/ Monthly Basis



(b) Mechanical

(i) Graphs for all major pumps and blowers (including but not limited to Sewage

Pumps, Primary Sludge Pumps, Return Activated Sludge Pumps, Thickened Sludge

Pumps, Biogas Scrubber Pumps, Centrifuge Feed Pumps, Process Air Blowers,

Biogas Mixing Blowers, Biogas Scrubber Blowers, Scrubber Air Blowers):

Pump Performance Curves : Q vs H, speed, P, Efficiency, and NPSH

ISO-efficiency curves of the pump model proposed

(c) Electrical & Instrumentation

(i) Electrical Single Line Diagram.

(ii) Sizing Calculations for Transformers.

(iii) Electrical load list & Specific Energy Consumption

(iv) Technical Schedules for Electrical Works duly filled in.

(v) Instrumentation & SCADA

3.9.5 Details of Drawings and Calculations to be submitted by the Contractor for Approval

Drawings / Calculations for approval shall be submitted by the selected Contractor after award of the

contract in two Phases.

The first phase shall be the Preliminary Drawings / Designs. Drawings / Designs submitted during this

phase shall be of sufficient detail for the Employer and Engineer to understand in outline the

Contractor’s proposals for the design and construction of the Works. The lists provided below shall

not be considered comprehensive. The bidder shall be responsible for including any and all drawings

and information for any and all works that may be necessary for full and complete definition or

clarification of the design, regardless of whether or not such drawings, information, or works are

explicitly included in the lists below or elsewhere in these bid documents.

The Preliminary Drawings / Designs for STP shall inter alia comprise:

Detailed Description of the proposed Sewage Treatment Plant and Treatment Process

offered (including Raw and Treated Sewage Quality).

Detailed Plant Operation and Control Philosophy;

Detailed Process Design Calculations , Mass Balance Calculations covering all Units

and Equipment.

Detailed List of Units including Unit Dimensions/ Free Boards.

Detailed Equipment List

Major Equipment /Instrument Specifications (with supporting Brochures).



Major Piping Schedule to include size, material, coating, lining, gauges/thickness,

and pressure rating

Major Valve Schedule to include size, type, material, pressure rating,

operator/actuator type, and whether Open/Close or Modulating

Gate Schedule to include size, type, differential head, seating or unseating,

operator/actuator type, and whether Open/Close or Modulating

Detailed Plant Layout (including Pipe Sizes/ Pipe Routing/ Channel Size/ Channel

Routing/ Site Roads/ Site Drainage)

Detailed Hydraulic Profile including Hydraulic Calculations;

Detailed Process Flow Diagram (inclusive of Mass Balance)

Process and Instrumentation Diagram (P&ID) & SCADA.

Detailed Electrical Load List for STP prepared based on approved Equipment list

from process and Mechanical

Transformer sizing calculation for STP based on approved Electrical load list

Detailed Chemical Consumption Calculations (Daily/ Monthly Basis).

Full Hazardous Area Classification Analysis and Report per IS 5572 for STP in the

contract.

Hazardous Area Classification Drawings per IS 5572 for STP in the contract.

The second phase shall be the Detailed Engineering Design phase and shall comprise the submission

of the Detailed Mechanical/ Electrical/ Instrumentation/ SCADA/ Structural/ Civil Construction

Drawings and Calculations. These shall be submitted after the approval of the Preliminary Drawings.

The lists provided below shall not be considered comprehensive. The bidder shall be responsible for

including any and all drawings and information for any and all works that may be necessary for full

and complete definition or clarification of the design, regardless of whether or not such drawings,

information, or works are explicitly included in the lists below or elsewhere in these bid documents.

The Construction Documents shall be used for the construction of the Works and shall inter alia

comprise:

(a) Civil

Site layouts for STP providing information on levels and detailing the location of:

General arrangements and main sections of all plant areas;

Plans, elevations and main sections of all structures and buildings;

Buildings

Storage tanks;

Process plants;

Transformer enclosures



Roadways;

Drainage (plant drainage, sanitation and storm water drainage);

Buried pipelines;

Cable routes for direct in ground and ducted systems;

Detail drawings of:

Cable and pipe work chambers;

Buried pipe work;

Pipe work connections;

Contract interface;

Reinforcement drawings;

Bar bending schedules.

Calculations for:

Detailed Structural Design calculation of all the units/ Structures;

(b) Hydraulic

Detailed hydraulic profile;

Detailed hydraulic calculations

(c) Process

Drawings:

Process Flow Diagram;

Comprehensive P&IDs including details of:

(i) Pipeline sizes and materials;

(ii) Valve size and type;

(iii) Equipment detail

(iv) Instrumentation;

(v) Identification of controlling PLC.

Calculations for:

Detailed Process Design Calculations / Mass Balance Calculations covering all Units/

Equipment.

Detailed List of Units including Unit Dimensions/ Free Boards.

Detailed Equipment List

Major Equipment /Instrument Specifications (with supporting Brochures).

Major Piping Schedule to include size, material, coating, lining, gauges/thickness, and

pressure rating

Major Valve Schedule to include size, type, material, pressure rating, operator/actuator type,

and whether Open/Close or Modulating



Gate Schedule to include size, type, differential head, seating or unseating, operator/actuator

type, and whether Open/Close or Modulating

Detailed Process Flow Diagram (inclusive of Mass Balance)

Detailed Electrical Power Consumption Calculations for STP

Detailed Chemical Consumption Calculations (Daily/ Monthly Basis).

(d) Mechanical

Drawings:

Outline dimensional drawing & Cross section Drawing (with Bill of Quantity and Material of

construction) for the following items for STP, but not limited to:

1. Fine screens

2. Belt Conveyor for screenings

3. Sluice valve – motorised & manually operated

4. Non-Return valves

5. Knife Gate Valves

6. Dismantling joints

7. H.O.T & E.O.T Cranes

8. Sluice gate – Manual & Motorised

9. Dewatering Pump set

10. Grit removal equipment

11. Fine Bubble Diffused Aerators along with Grid

12. Process Air Blowers

13. Primary & Secondary Clarifier

14. Return activated sludge Pump set

15. Submersible Mixers for sludge sumps

16. Chlorination system

17. Primary Sludge pumps

18. Return Activated Sludge Pumps

19. Chlorination system

20. Plant Drain Pumps

21. Plant Water Pumps

22. Sludge Dewatering Machine

23. Biogas Scrubbing system

24. Gravity Sludge Thickeners

25. Dissolved air floatation(DAF) system

26. Thickened sludge pump sets

27. Chemical Dosing Pumps and Agitators



28. Sludge conveyor system & Hopper

29. Gas Digesters-Accessories and safety devices

30. Biogas Mixing compressor

31. Digester Heating System and Heat Exchangers

32. Other Ancillary Digester Equipment

33. Gas Flare system

34. Biogas Engine

Graphs for all major pumps and blowers (including but not limited to Sewage Pumps, Primary

Sludge Pumps, Return Activated Sludge Pumps, Thickened Sludge Pumps, Biogas Scrubber Pumps,

Centrifuge Feed Pumps, Process Air Blowers, Biogas Mixing Blowers, Biogas Scrubber Blowers,

Scrubber Air Blowers):

Pump Performance Curves : Q vs. H, speed, P, Efficiency, and NPSH

ISO-efficiency curves of the pump model proposed

(e) Electrical

(1) Single Line Diagram of Complete Electrical System for STP based on the

equipment’s finalized by Mechanical and Process.

(2) Electrical Substation Layout of STP showing Panel locations, Transformer locations

and Trench Layout.

(3) 11kV Switchgears

(a) Dimensional Drawing showing overall dimensions, plan, elevation and cable

entry details.

(b) Complete assembly` drawings of the Switchgear showing plan, elevation and

typical sectional views, details of bus bars and location of cable end boxes

and control cable terminal blocks for external wiring connections, etc.

(c) Foundation plan showing the location of channel sills, anchor bolts and

anchors, floor plans and openings.

(d) Schematic power and control wiring diagrams along with control & interlock

details, complete bill of materials indicating make, type, rating, setting etc of

Circuit breakers, relays, contactors, current transformers, potential

transformers, instruments, meters, annunciations etc.

(4) 11kV / 433 kV Transformers

(a) General arrangement drawing of the transformer, showing plan, front

elevation and side elevation complete with all accessories and fittings,

detailed dimensions, net weights, quantity of oil, clearances between HV



terminals, between LV terminals, between HV and LV terminals, between

HV & LV terminals and ground etc.

(b) Rating, diagram and terminal marking, complete with polarity and vector

group.

(c) Control wiring diagram for marshalling box.

(d) Foundation drawing with position of foundation bolts and depth.

(5) L.T Panels, Distribution Boards, Power Control Centres, Power Motor

Control Centres, Motor Control Centres etc.

(a) Dimensional Drawing showing overall dimensions, plan, elevation and cable

entry details.

(b) Complete assembly drawings of the switchboard/distribution board / MCC

showing plan, elevation and typical sectional views, details of busbars and

location of power & control cable terminal blocks for external wiring

connections, etc.

(c) Foundation plan showing the location of channel sills, anchor bolts and

Anchors, floor plans and openings.

(d) Schematic power and control wiring diagrams along with control & interlock

Details, complete bill of materials indicating make, type, rating, setting etc.

of Circuit breakers, relays, contactors, current transformers, potential

Transformers, instruments, meters, annunciations etc.

(e) Feeder Operation and Interlock logic.

(6) L.T Capacitor bank with Automatic Power Factor Correction Relay

(a) Fully dimensioned general arrangement drawings of capacitor and capacitor

control panel with elevation, side view, sectional view and foundation details.

(b) Justification for number of steps for switching.

(c) Complete schematic and wiring diagrams for capacitor control panel.

(7) Variable Frequency Drives

(a) Dimensional details with mounting arrangement.

(b) Schematic power and control wiring diagrams along with control & interlock

Details, complete bill of materials indicating make, type, rating, setting etc of

Circuit breakers, relays, contactors, current transformers, potential

Transformers, instruments, meters, annunciations etc.

(c) Specific details of converter, inverter and harmonic control units.

(8) Battery and Battery Charger with D.C. Distribution board



(a) Dimensioned general arrangement drawings

(b) Fully dimensioned general arrangement drawings of battery and battery

charger with elevation, side view, sectional view and foundation details

(c) Complete schematic and wiring diagrams

(9) Cabling System

(a) Make and type of HT& LT Power and Control Cables.

(b) Details of Installation of Cables in Trenches, on cable trays, directly buried

etc. at all locations inside the plant.

(c) Cable routing plan and section inside the plant.

(d) 11kV Cable termination and mounting Kit Layout drawing.

(10) Lighting system

(a) Make, type, rating etc. of various fixtures, receptacles, switches etc. in

various premises.

(b) Make, type, rating etc. of various fixtures, lighting poles etc. for street

lighting and flood lighting.

(c) Detailed Room wise Lighting Layout with Type of fixture details and Circuit

diagram showing phase wise load distribution and interconnection between

switches, fixtures, Lighting panel, receptacles etc.

(d) Internal road Lighting and Area lighting layout with location of poles, details

of fixtures and mounting.

(e) Street Light pole details with Foundation details.

(11) Earthing System

(a) Details such as material, sizes, etc. of the earth conductor and electrode pits.

(b) Earthing layout drawing showing routing of main grid inside the plant with

details of interconnection of equipment earthing to the grid and earth pits.

(12) Electrical Equipment and Panel Layout for STP.

Schedules :

1- Cable schedules & bill of quantities

2- Electrical Load and Power consumption schedule

3- Junction box schedule

4- Protection relay setting schedule.



Calculations :

1- Specific Energy Consumption Calculations.

2- Bus bar sizing calculation for 11 KV Switchgears, 415 V Switchgears etc.

3- Co-ordinated protection study.

4- Fault level and Voltage Dip Calculations.

5- Sizing of Capacitor banks.

6- Non Segregated Bus Duct

(a) Sizing of the bus bars vis-à-vis thermal capability to withstand rated

Continuous current and one second short time current.

(b) Spacing of the insulators vis-à-vis mechanical strength to withstand forces

due to momentary short circuit current.

(c) Heat loss and temperature rise calculations for conductor and enclosure. All

formulae and other information from which the heat losses have been derived

shall be enlisted.

7- HT and LT Cable sizing.

8- Earthing sizing calculation

9- Room wise Lighting Calculation as per Lux level given in the specification.

10- Building Lightning Protection and Earthing Sizing Calculation.

(f) Control and Instrumentation

Drawings:

Power supply distribution single line and schematics diagrams (see note 1) for each

control panel;

Internal and external (see note 2) general arrangement for each control panel

(dimensional);

Control panel wiring diagram, , relay logic diagram along with terminal block details;

System configuration and layout diagram along with bill of material, program

listings, block logic diagram and control logic write up for plc;

Ups and battery sizing calculations;

Control and instrumentation loop drawings (see note 3);

Instrument installation detail drawing (hook up, see note 4);

Cable block diagrams;

Cable routing/installation drawings;

Foundation and fixing details and trenches drawings;

Mimic general arrangement (full colour copies shall be provided).

Schedules:

Cable schedule;

Cable interconnection schedule;

Control and instrumentation load schedule for each control panel;



I /O schedule;

junction box schedule;

Instrument schedule with tag nos.

Instrumentation, process control set point schedule;

Instrument data sheets;

Documentation:

functional design specification (FDS)(see note 5);

Factory Acceptance Test (FAT document);

Site Acceptance Test (SAT).document

Notes:

1. Schematic drawings shall include a comprehensive schedule of the components used in each

switchboard, MCC and control panel including details of the type, manufacturer and rating of

each component.

2. The external arrangement of each switchboard, MCC and control panel shall show the

arrangement of all components including details of panel section, switch and instrument labels.

3. Control and instrumentation loop drawings shall show on a single drawing the complete circuit

associated with an instrument or device including details and location of power supplies, cabling

and terminations.

4. Hook up drawings shall detail how an instrument or device is installed.

5. See details later for requirements of the FDS.

Electrical control schematics, loop diagrams and schedules shall where practical be A3 size drawings;

all other drawings shall be A1 size.

(g) Mechanical Building Services

Drawings:

Single line schematics for waste water system and drainage systems;

General arrangement drawings showing the location of each mechanical building service

plant item;

General arrangement of ventilation systems;

Fixing details.

Schedule:

Plant data sheets with Equipment GA dimensional drawing, Foundation detail, Calculation

and Manufacturer’s Quality Assurance Plan;

Pipeline schedules;

Valve schedules.



Calculations for:

System & Equipment sizing.

The Engineer in Charge reserves the right to ask for additional Equipment/system information apart

from the above to ascertain good system design and proper selection of Equipment.

3.9.6 As-Built Drawings

These drawings shall be compiled by the Contractor and shall constitute a permanent record of the

Works as executed. These shall include all such drawings, schedules, documentation and calculations

as necessary for a complete understanding of the Works design, operation and maintenance.

The As-Built Drawings shall consist of the fully up-dated versions of the approved Construction

Documents incorporating any additional information which will assist the Employer in operating,

maintaining and if necessary modifying or extending the Works at a later date. These drawings should

extend and supplement the information given in the Operating and Maintenance Manuals.

A3 and smaller sized As-Built Drawings shall be provided on durable paper for reproduction by

photocopier. As-Built Drawings larger than A3 sized shall be provided as a paper copy and also

produced in the form of black lines on a durable translucent film from which further paper prints can

be taken by others as required. In addition drawings shall be provided as an AutoCAD software copy

in editable form in Compact Disc (CD) in two sets.

Other related information such as Technical Proposal as per clause 3.16.5 and Section 6 - Technical

Schedule but not limited to, shall be provided in hardcopy as well as editable softcopy format

(Microsoft Word, Excel, Access, or Project).

3.10 Inspection and Training Requirements

The Contractor shall make all necessary arrangements for to and fro travels of the Employer’s

Engineers / Officers & Consultant for pre-delivery inspection of major equipment in India or Abroad.

The entire travelling cost including ticketing, boarding, lodging, local travel, visa charges, insurances

and other miscellaneous cost, of the members of the Employer’s team shall be borne by the Contractor

as per RBI Guidelines (for overseas visit) and no claim, whatsoever on this ground, shall be

entertained by the Engineer-in-Charge. The Contractor shall keep a provision in the program for 4

weeks’ notice for inspection in India and 12 weeks’ notice for testing/inspection overseas.

3.11 Operating and Maintenance Manuals

3.11.1 General

The Contractor shall compile operating, maintenance and overhauling instructions for the whole of

the Plant.



The instructions shall consist of one volume of:

(a) General descriptive text (including drawings for illustration) of the Works described section

by section.

(b) Complete operational instructions for the sewage treatment plant. This shall be termed the

Operators Manual. It shall be aimed at the operational staff and shall be written in clear

unambiguous text complete with drawings which necessary for clarification of any issues.

The manual shall comprehensively detail what to do on a day to day basis and also what to do

in the event of faults develop. It shall in addition provide a complete list of the process

maintenance tasks the operator should carry out including the intervals between these tasks.

(c) Essential instructions for mechanical and electrical maintenance of the Plant. These

instructions shall be short and concise and set out in a consolidated schedule the inspection,

lubrication, cleaning and any other type of servicing operations required. The Contractor shall

prepare typical maintenance log sheets that the Employer can subsequently use for daily,

weekly, monthly or other periodic maintenance and shall form record sheets of plant

maintenance operations.

(d) Instructions for use of skilled maintenance personnel in fault location, carrying out routine

replacements, withdrawing, dismantling, overhauling, re-assembling and testing the various

items of Plant.

(e) Manufacturer’s Technical Documentation subdivided into categories for:

Civil;

Process;

Electrical;

Electrical building services;

Mechanical building services;

Instrumentation and control.

(f) Civil As-Built Drawings.

(g) Comprising the FDS and PLC code.

(h) Electrical As-Built Drawings: The electrical drawings shall be complete sets including all

information necessary for maintenance and spares replacement.

(i) Control and instrumentation As-Built Drawings: The drawings shall be complete sets

including all information necessary for maintenance and spares replacement.

(j) Mechanical As-Built Drawings: The mechanical drawings shall be complete sets including

all information necessary for maintenance and spares replacement.

(k) Electrical and mechanical building services As-Built Drawings: The drawings shall be

complete sets including all information necessary for maintenance and spares replacement.

(l) FAT records for the Plants and Works.

(m) SAT records for the Plants and Works.

Each volume shall be subdivided (relating to areas of plant) into sub sections or sub-volumes in order

to ease the location of plant details. Each volume or sub volume shall be provided with a

comprehensive index for the volume or sub-volume concerned and the O & M manual as a whole.



Each volume shall be enclosed within A4 and A3 ring binders having tough grease resistant covers

suitable for use on site and designed to permit the easy removal and insertion of the contents. The

front cover and spine of each volume shall show details of the project, Employer, Engineer and a

volume title.

Text shall generally be enclosed in A4 ring binders, A3 drawings shall be enclosed within A3 ring

binders except where they accompanies A4 text in which case they shall be folded. A1 drawings shall

generally be folded and enclose in A4 box files. Where A1 drawings accompany text they shall be

folded and enclosed in an A4 plastic wallet, one wallet per drawing.

3.12 Submission of Documents and Drawings

The Contractor shall supply to the Engineer in Charge 5 (five) copies each of the drawings

and design calculations for the process and sizing of all components of the System including

architectural, structural, mechanical, electrical and instrumentation equipment, supported by

flow diagrams and general arrangement drawings for approval.

The Engineer may require the Contractor to submit for approval additional drawings if they

are necessary to enable him to satisfy himself that the items are well designed, that they

comply with the Employer’s Requirements and that they are suitable for their intended

purpose. These drawings shall form the agreed basis for the execution of the Works. If an

approved drawing is revised, revised copies shall be submitted for approval as above and no

such revised drawing shall be used for the purposes of the Contract until it has been approved

in place of the earlier issue of the drawing.

The Employer shall arrange to send observations if necessary within 28 (twenty eight)

calendar days of submission of the design and drawings for modifications to the Contractor.

The Contractor shall incorporate all necessary comments of the Engineer in the above design

and drawings, if any, and shall re-submit further 5 (five) copies each of the revised designs

and drawings within 10 (ten) days for the final approval of the Engineer. The Contractor shall

thereafter submit 8 (eight) copies each of the approved designs and 8 (eight) copies each of

the approved drawings together with one copy each of the reproducible tracings. The

Engineer will return 2 (two) approved copies to the Contractor and retain 6 (six) for the

Engineer’s office and field use.

If the submissions require more than one round of revision on account of incomplete

compliance from Contractor, the delay will be on account of the Contractor. If new

observations are given by the Engineer, the Contractor will be entitled to take an additional 10

(ten) days period for compliance.

The Engineer will signify his approval or disapproval of the Preliminary Phase Drawings /

Construction Documents within 28 (twenty eight) calendar days of each submission.



The structural designs shall be submitted along with STAAD files (input and output).

The Construction Documents are certified Drawings submitted by the Contractor to the

Employer or Engineer during the course of the Contract for approval. Construction

Documents shall be submitted in accordance with the timetable set down in the Work

Programme.

Approval of drawings by the Engineer shall not be held to relieve the Contractor of his

responsibilities under the Contract.

The construction drawings shall be submitted in A3 / A1 sized drawing papers and to readable

scale.

The Engineer will not permit construction to start on a part or section of the Works unless

Construction Documents for that part or section have been approved.

Draft copies of the O & M Manuals shall be submitted to the Engineer for his approval at

least 56 (fifty six) calendar days prior to the commencement of Tests on Completion.

The Engineer will signify his approval or disapproval of the O & M Manuals within 28

(twenty eight) calendar days of submission.

Draft As-Built Drawings shall be submitted 56 calendar days prior to the commencement of

Tests on Completion.

The Engineer will signify his approval or disapproval of the As-Built Drawings within 28

(twenty eight) calendar days of submission.

The Final As-Built Drawings shall be submitted prior to the issue of any Taking Over

Certificate.

To remove doubt the submission dates referred to above shall be the dates on which the

drawings and documents are received by the Engineer

3.13 Contract Management

The Contractor shall be responsible for administration of the Contract from award of Contract through

design, manufacture, manufacturer's works testing, and delivery of Plant to Site, installation, testing

and performance testing to final take over. For this purpose he shall nominate a Contractor’s

Representative in accordance with Sub-clause 4.3 of the General Conditions of Contract who shall be

fully responsible for and undertake this administration.

Specific responsibilities of the Contractor’s Representative shall be:

(a) The sole representation on behalf of the Contractor in all discussion, correspondence and

matters relating to the Works.

(b) The co-ordination and monitoring of Contract progress, which shall include the preparation of

the Contract programme, monitoring of progress and submission of monthly progress reports.

At the discretion of the Engineer, regular meetings shall be called at which the Contractor’s

Representative shall give a full account of the Contract progress and programme.



(c) The co-ordination and checking of designs, drawings and submissions. The Contractor’s

Representative shall be responsible for co-ordinating the design, technical information and

data between sub-contractors. All calculations, drawings and information submitted to the

Engineer shall be checked by the Contractor’s Representative and certified as having been

checked before submission.

(d) Contract communication between the Engineer and the Contractor. The Contractor’s

Representative shall attend all meetings involving the Contractor and the Engineer.

(e) The co-ordination and programming of manufacturer's works tests and the submission of test

certificates.

(f) The co-ordination and programming of Plant delivery.

(g) The co-ordination and programming of the installation of Plant on the Site, site tests and take

over trials. The Contractor’s Representative, although not necessarily based at the Site, shall

be responsible for the various sub-contractors. At the discretion of the Engineer regular site

meetings will be held during which the Contractor’s Representative shall give full account of

site progress and programme.

(h) The Contractor’s Representative shall also be responsible for producing in advance of the

work being undertaken, detailed method statements of any work, which involves or affects the

performance of existing equipment, processes, or disruption to existing water supplies.

(i) The co-ordination and preparation and submission of As-Built Drawings and Operation and

Maintenance Manuals.

(j) Soft copies of all submissions should be in editable form.

(k) The preparation and co-ordination of training of Employer’s Personnel.

(l) The submission of applications for payment.

3.14 Meetings

From time to time the Engineer will call meetings in his office or at the Contractor's office, or at the

Site, as he deems necessary, to discuss progress and any technical points requiring settlement. The

Contractor's Representative or responsible representative shall attend such meetings.

The Contractor shall prepare and submit to the Engineer in Charge a daily activity report summarising

the main activities undertaken each day.

3.15 Notice of Operations

The Contractor shall give full and complete written notice of all important operations to the Engineer

sufficiently in advance to enable the Engineer to make such arrangements as the Engineer may

consider necessary for inspection and for any other purpose. The Contractor shall not start any

important operation without the written approval of the Engineer.



3.16 Protection of Existing Installations

The Contractor shall apply to the Engineer in writing at least 28 days before starting any work that

involves interference with existing structures, equipment, etc. The Contractor shall not execute such

work until he has received permission to proceed, in writing from the Engineer.

The Contractor shall ensure that no earth, debris or rock is deposited on public or private roads or

rights of way as a result of the Works and all vehicles leaving the Site shall be cleaned accordingly.

3.17 Protection of Existing Public and Private Services

The Contractor shall notify all public authorities, utility companies and private owners of proposed

works that will affect them not less than two weeks before commencing the works.

The Contractor shall adequately protect, uphold, maintain and prevent damage to all services and shall

not interfere with their operation without the prior consent of the public authorities, utility companies,

private owners, or the Engineer as appropriate.

If any damage to services results from the execution of the Works, the Contractor shall immediately:

(a) Notify the Engineer and appropriate public authority, utility company or private owner.

(b) Make arrangements for the damage to be made good without delay to the satisfaction of the

public authorities, utility company or private owner as appropriate. The Contractor shall be

liable for all costs for making good such damage.

The Engineer may issue instructions or make other such arrangements as he deems necessary, to

repair rapidly any essential services damaged during the execution of the Contract. Such arrangements

shall not affect any liability to pay for making good the damage.

3.18 Reinstatement and Compensation for Damage to Persons or Property

The Contractor shall reinstate all properties whether public or private which are damaged in

consequence of the construction and maintenance of the Works to a condition as specified and at least

equal to that obtaining before his first entry on them.

If in the opinion of the Engineer the Contractor shall have failed to take reasonable and prompt action

to discharge his obligations in the matter of reinstatement, the Engineer will inform the Contractor in

writing of his opinion, in which circumstances the Employer reserves the right to employ others to do

the necessary work of reinstatement and to deduct the cost thereof as certified by the Engineer from

any money due or which shall become due from the Employer to the Contractor.



The Contractor shall refer to the Employer without delay all claims, which may be considered to fall

within the exceptions listed in the Conditions of Contract.

3.19 Spare Parts

The spares shall comprise an adequate stock of the parts likely to be needed as routine replacements

together with any major items or components which it may be desirable to hold in order to facilitate or

expedite repair.

Spare parts shall be new and shall be packed separately from the main Plant in packages or containers

designed to preserve the spares from the effects of long term storage under the ambient conditions

specified. Any items that cannot be packed in this way must be protected from corrosion by applying

temporary protective coatings and shielded from mechanical damage. All items shall be clearly

labelled with brief descriptions and part numbers.

The Contractor may use spare parts provided under the Contract to replace failed parts prior to the

issue of the Performance Certificate for the Works. However the Contractor shall be responsible for

replacing those parts used with identical parts at no cost to the Employer.

Spare parts to be supplied under this contract shall be interchangeable where possible within the

treatment plants constructed under this contract and shall be adequate for a period of five years after

handing over the plant to Employer.

3.20 Special Tools and Appliances

The Contractor shall supply two complete sets of the special tools, lifting tackle, access equipment

(ladders, scaffolding etc.) and greasing equipment necessary for the maintenance, repair, testing and

overhaul of the Plant.

The tools and tackle shall not be used for the erection of the Plant and shall be handed over in a new

and unused condition except that the Engineer may call upon the Contractor to demonstrate their use.

The Contractor will be permitted to utilise the overhead gantry cranes supplied under this Contract for

the purposes of installing the equipment in his supply. The Contractor shall be responsible for making

all arrangements for the electricity supply to operate the cranes and for their service, maintenance and

repairs. On completion of the installation and before hand over of the Plant the Contractor shall

restore the cranes to an as new condition by the replacement of all worn or defective components.

All special tools and test equipment necessary for overhauling the Plant and testing its performance

shall be included and mounted in suitably designed cabinets with lockable doors. Racks and clips



shall be provided for individual items with outline markings and labels to show where any equipment

is missing.

3.21 Packing and Protection

Before any equipment/ material is despatched from a manufacturer's factory it shall be adequately

protected and packed to ensure that it will arrive on the Site in an undamaged condition. The methods

employed for protection and packing must be suitable for withstanding the Experienced during

shipment, delivery to the Site and prolonged periods of storage in the open, whether the items are

shipped in packing cases, crates or only partially protected according to their nature.

Bright parts and bearing surfaces shall be protected from corrosion by applying a rust preventive

lacquer, high melting point grease or similar temporary protection. A sufficient quantity of solvent

shall be supplied with the plant to enable this coating to be removed on the Site.

All machined flanges and other mating surfaces shall be protected by means of wood templates. The

bolts for securing these templates shall not be reused in the final installation.

No one crate or package shall contain items of Plant intended for incorporation in more than one part

of the Works.

All items of Plant shall be clearly marked for identification against the packing list, which shall be

placed in a waterproof envelope inside every packing case or crate.

Every packing case and crate shall be indelibly marked to show its weight, serial number, top and

bottom, shipping marks and handling instructions or sling marks.

Electrical Plant shall be enclosed in sealed airtight packages with dehydrating material, before being

placed in packing cases on shock-absorbent material and secured by means of battens.

3.22 Quality Assurance

3.22.1 Policy

In accordance with the Conditions of Contract the Contractor shall apply the formal requirements of

Quality Assurance to the design, supply, construction and maintenance of the Works. This shall be

achieved through the implementation of a Quality System compliant with the requirements of BS

5750 or an equivalent International Standard. Positive commitment to Quality Assurance shall be

expressed in a formal policy statement given in the Contractor's Quality Manual.



3.22.2 Objectives

It shall be the stated aim of the Contractor to achieve and demonstrate the achievement of quality as

expressed by `due care and diligence' of the design, supply, construction and maintenance of the

Works as defined by the Employer's Requirements.

The criteria to define `due care and diligence' shall be explained in the Contractor's Quality Plan and

shall embody all of the design, supply, construction and maintenance requirements of the Works.

3.22.3 Quality System

The Quality System shall be fully integrated for all of the Works. Conditions which may be This

system will be defined by the organisational structure, responsibilities, activities, resources, and

events that together demonstrate the capability of the Contractor to meet the stated quality

requirements.

The Contractor shall ensure that all sub-contractors and sub-consultants establish quality systems and

shall supply to the Employer such evidence as is necessary to demonstrate the effective

implementation of a quality system in each sub-contractor or sub-consultant organisation.

The Quality System of the Contractor and of his sub-contractor and sub-consultants will be subject to

periodic audits undertaken by the Engineer. The Engineer will give two weeks' notice of such audits

that will involve a full assessment of the performance and efficiency of the Quality System and will

include review of the feedback and records derived from the Contractor's monitoring and internal

reviews.

On a day-to-day basis the Contractor shall afford reasonable availability of staff and documentation

for the Engineer to assess the implementation of the Quality System. The Contractor shall ensure that

all relevant personnel and documentation are available for such audits.

3.22.4 Quality Plan

The implementation of the Quality System shall be through the establishment of a comprehensive

Quality Plan issued to and approved by the Engineer.

The documented procedures shall include but not be limited to:

Management Procedures;

Design;

Supply/Procurement;

Construction;

Putting to work/Commissioning/Reliability Trial/Performance Test;



Operator Training and Maintenance;

Interface Control;

Quality Performance, Monitoring and Review.

There shall be procedures to control transmission of information across all interfaces both internally

(that is, within the Contractor's Quality System) and externally. Those of the latter shall include all

Statutory Bodies, Authorities and the Engineer.

Formal assessment of any non-compliance with the Quality Plan shall be achieved through periodic

reviews undertaken by a team appointed by the Contractor. All deficiencies shall be recorded and

appropriate corrective measures shall be assessed, within an appropriate timescale, through

subsequent formal reviews undertaken by the Contractor.

3.22.5 Quality Control and Type Testing Recommendations Submission

3.22.6 Quality Control

Progress on a project is not at the expense of quality of finished product. Quality control is, therefore,

an important concern for the Contract. The Contract includes a detailed specification for all materials,

items of plant and equipment, and workmanship. The contractor will ensure that

All material, plant and equipment intended to be used in the project comply with specifications. All

tests required in the specifications are properly carried out under the supervision of the Engineer;

3.22.7 Standard of workmanship are in accordance with the specifications;

All required test certificates and reports, are supplied, in a timely manner.

It will be ensured that the quality control system of the complete project is made during design and

planning stage. Quality control during construction will largely consist of ensuring conformance to

original design and planning decisions.

Contractor is required to provide a quality control system/ process with reasonable assurance that its

personnel comply with applicable professional standards in achieving the quality of finished product.

3.22.8 Quality Assurance Methodologies in General

Maintain continuity of quality assurance surveillance throughout fabrication of products and

execution of work.

Submit details of quality assurance tests and methods inclusive of the specification.



Perform inspection and testing in accordance with specified reference standards, or as

otherwise approved by the Engineer in Charge.

Calibrate measuring and testing devices periodically against certified standard equipment.

3.22.9 Quality Assurance of the Works on site

Provide an assurance system to ensure quality assurance by phased inspection as follows:-

1. Preparatory Phase Inspection

2. Perform inspections prior to commencement of each part of the works which shall include a

review of requirements with the supervisors directly responsible for that part of the works.

Such review shall be in the form of written statements of the processes to be followed and

critical characteristics, tests and similar evaluations which will be a part of inspection

procedures. Verify that products incorporated with that part of the works which have been

tested and applicable submissions have been made for control testing. Verify that proceeding

work has been completed and approved. Verify products incorporated with that part of the

works confirm to submission data and Contract requirements and that necessary materials and

equipment are easily and readily available.

3. A construction Risk Workshop should be arranged before construction commences to

evaluate the risk and develop measures to mitigate against those risks.

3.22.10 Continuing Inspection

Perform inspection on a continuing basis as each part of the works commences and on a regular basis

to ensure constant compliance with the requirements:

I. Provide samples of materials to be tested in required quantities at locations where testing is

performed.

II. Provide labour, instruments, testing devices, facilities and required shelter at the site.

To determine ambient and material temperature by thermometers with Celsius scale.

To determine relative humidity of air and moisture content of materials.

To facilitate inspection and tests.

For obtaining and handing of samples at site and plant.

III. Upon receipt of items at the job site, the Contractor’s quality assurance representative at the

site shall be responsible on receipt of items at the site for nothing damage suffered by them

during transit and for directing that they be replaced.

IV. The Contractor shall be responsible for protecting and maintaining items on the site free from

damage during storage, erection, installation and maintenance.

V. When it is discovered on inspection that work is proceeding with incorrect materials or

methods, ensure the corrections are immediately made and that improperly complete work is

replaced.



3.22.11 Quality Assurance of Off-Site Works

(i) The Contractor shall impose quality assurance methods at the location of manufacture,

fabrication and assembly of items to be incorporated in the works to ensure that they conform

to requirements of the Contract Documents. This quality assurance shall not apply to

proprietary catalogue production products except as may be deemed necessary by the

Contractor or as directed by the Engineer.

(ii) The Contractor’s quality assurance representative off-site shall be responsible for the release

of items for transit to the job site.

(iii) In addition to the Contractor shall provide notice to the Engineer in writing at least 4 weeks in

advance of packing of every batch of product components or assemblies so that the Employer

or Employer’s Consultants and their designated representatives may have opportunity at his/

their choice of inspecting any such product components or assemblies prior to transportation

at the cost of the bidder.

(iv) The products requiring factory, shops, supplier’s or sub-contractor’s inspection are identified

in relevant specification in the specific codes.

(v) Acceptance of product components or assemblies prior to transportation shall not imply final

acceptance under the Contract.

3.22.12 Schedule of Quality Assurance Operations

Provide the Engineer with a minimum of three copies of a schedule of quality assurance operations,

both on-site and off-site, to outline the procedures, instructions and reports which will be used, as

follows :-

Quality assurance organization.

Qualifications of quality assurance personnel

Authority and responsibilities of each quality assurance person

Schedule of inspections and tests with personnel assigned to each task and duration of each

task.

Schedule of required services to be provided by inspection and testing firms.

Coordination required in order that quality assurance is integrated.

Test methods which will be utilized.

Methods of performing and documenting quality assurance operations,

3.22.13 Tests required by Jurisdictional Authorities

The Contractor shall be responsible for inspection and testing required by jurisdictional authorities in

conformance with the performance requirements.

If the Engineer-in-Charge so desires, he may delegate inspection and testing of materials or plant by

an independent body/ agency. Any such delegation shall be effected for this purpose shall be



considered. Notice of such appointment (not being less than 14 days) shall be given by the Engineer-

in-charge to the Contractor.

3.22.14 Delegation of Powers

The Engineer in Charge may delegate inspection however may not delegate responsibility.

3.22.15 Quality Assurance Reports

Document each test and inspection on a report and submit the report in triplicate to the Engineer in

Charge Reports shall be in an approved format and shall certify off-site items produced correctly for

on-site work of installed correctly, as applicable. Similarly the report shall certify items that are

defective with a statement of records on corrective measures taken. Include on each report the purpose

of the inspection or test, a description of methods used, observations made and personnel involved.

The Contractor shall also maintain in the approved format a log book of all tests performed which

shall include the date of test, type of test and the results of the test. If inspection and testing

procedures are sub-contracted to an approved inspection and testing firm, only copies of test reports

signed by the approved inspection and testing firm will be acceptable.

3.22.16 Quality Feedback

The system shall include for the reporting back, recording and incorporation into the system of

deficiencies and remedial measures to correct them noted during the control of the project.

3.23 Submittal on Health, Safety and Environment (HSE) Management System

Health, Safety & Environment (HSE) Management System shall be read in conjunction with the

General Conditions of Contract, Technical Specification and all relevant regulation of the UPJN

including but not limited to the model rules for the projection of health and Sanitary Arrangements for

workers employed by CPWD, UPJN or its contractors, the CPWD contractors labour and NHRC

Guidelines and National codes.

3.23.1 Leadership and Commitment

The Contractor to firmly commit in maintaining the health and safety of its own employees,

employees of its sub-contractors, and other personnel who may be affected by its activities, protecting

the environment and preventing pollution as a result of its activities.



3.23.2 HSE Objectives for the Contract

The Contractor to have the following objectives concerning HSE for the contract:

Aim for a continual control of hazards and reduction of risk exposure to the workers and

those of sub-contractors and third parties.

Reduce incident / accident rates within the contract.

Ensure that all personnel are qualified to do their job and have undergone HSE Induction

Training.

Implement a scheduled programme of HSE promotion activities.

Implement a scheduled program of inspections and audits.

Contractor has to strictly follow the safety rule during construction and O&M at plant.

Employer reserve the right to suspend the work at any time if find laps in complying the

safety rules by contractor. In such situation work will be resumed at site only after necessary

compliance with the HSE requirements of contract to the satisfaction of Employer the during

progress of work.

3.23.3 HSE Target for the Contract

Contractor shall target to reduce accident and incident frequency to the lowest possible level and

ideally to zero, as this is the only truly acceptable level. The Contractor shall strive to improve

continuously on previous and existing performance by the use of the safety practices, techniques,

technology and equipment available and submit target for achieving the same.

3.23.4 HSE Professionals

Reporting and Follow-up

The contractor shall employ a qualified Safety Officer for direct reporting to Engineer-in-charge. All

line management at site shall follow the advice of the Safety Officer.

Safety Officer

The Contractor Safety Officer shall be qualified as specified in Factories Act and Building & other

construction Act of Govt. and will be involved in the following:

The assessment of Contractor/Sub-contractors with regards to HSE.

HSE Inspections, Audits and conduct emergency exercise / mock drill.

Carrying out Health, Safety and Environmental performance monitoring and surveillance

within the contact.



Communicate incident / accident reporting system within the contract and assist in Accident /

Incident Investigations and in the preparation of action plans.

Implementation of HSE rules, regulations and standards and permit to work system for

critical jobs. (i.e. hot work, manhole entry, working in hazardous area etc.)

Fire and smoking regulation.

Trenching, scaffolding and other construction structures.

Make standard for procurement, maintenance of minimum stock (at site store) for personal

protective equipment (PPE)

Use of training courses and use of promotional material.

The training of workers, first aiders and rescue teams, as required.

Emergency drills and exercises within the project.

3.23.5 HSE Communication, warning and safety signs

3.23.6 Coverage / Awareness

During construction of work, statutory safety signs shall be adequately provided throughout the work,

both indoors and outdoors. These safety signs shall cover mandatory, prohibition, warning, and

emergency, fire fighting and general notices. All signs shall be positioned around the works at highly

visible points with fluorescent colours where necessary. Provision of signs and position of signs shall

be subject to employer representative approval. Special attention shall be given to areas designated

hazardous. Working sign shall be both in English and Hindi. All permanent workplaces shall have the

means of communication (phone/radio) with Site Office and with the client’s representative.

Temporary worksites shall either have a phone/radio and a standby vehicle to drive to obtain

assistance.

3.23.7 Packing and Protection

Before any Plant is despatched from a manufacturer's factory it shall be adequately protected and

packed to ensure that it will arrive on the Site in an undamaged condition. The methods employed for

protection and packing must be suitable for withstanding the conditions which may be experienced

during shipment, delivery to the Site and prolonged periods of storage in the open, whether the items

are shipped in packing cases, crates or only partially protected according to their nature.

Bright parts and bearing surfaces shall be protected from corrosion by applying a rust preventive

lacquer, high melting point grease or similar temporary protection. A sufficient quantity of solvent

shall be supplied with the plant to enable this coating to be removed on the Site.



All machined flanges and other mating surfaces shall be protected by means of wood templates. The

bolts for securing these templates shall not be reused in the final installation. No one crate or package

shall contain items of Plant intended for incorporation in more than one part of the Works.

Emergency response contact phone number (Fire - - -, Security - - - and Medical - - -) and the contact

numbers of EIC, Site Engineer and Safety Officer will be displayed prominently at worksites. All

workers would be made aware of this number during their safety induction, and periodically during

toolbox meetings.

If a serious / major accident takes place, seek assistance of the client and try to shift the injured to the

medical assistance.

Emergency response drill will be carried out once a month.

3.23.8 Communication Links

The communication of HSE issues between the Contractor and Sub-contractors and Employer

involved within the project shall be carried out by the following means:

HSE Notices / Messages and instructions (through Safety Officer)

Management HSE briefings carried out as and when required and during Management

Review Meetings.

Safety Officer will issue of HSE Inspection and Audit report/s to concerned parties.

Monthly HSE Report for Engineer.

HSE campaign / promotion week (once in a year through poster / slogan competition or

recognise supervisor / workers who always work safely).

HSE Communications will be verbal / written / pictorial.

3.23.9 HSE Meeting Programme

The following schedule of meetings shall be implemented within the project: (The Safety Officer shall

maintain Records of attendance)

Engineer Meeting

To be held as and when scheduled by the Engineer in Charge. The actions identified in the meeting

will be designated to the concerned department head.

HSE Meeting

The following items are expected to be included within the agenda of HSE meetings:

Review of the contract/overall HSE performance

Accident / Incident statistics review and identification of any trends

Review of accidents / incidents, near misses and identification of any actions that can be

taken.



Discuss Incidents / reportable accidents and Learning points of others in the same field of

activities

New Procedures / Legislation / Codes of Practice

HSE promotion & Training

Discussion of Future work hazards / risks connected, with the contract

Any Other Business

Follow-up Actions

Minutes of meeting and follow up actions shall be recorded within the minutes of the meeting

along with the proposed completion date and action party’s name. The contractor follow up

the closeout actions (by concerned) and the same shall be reviewed and reported in the

subsequent meetings.

3.23.10 HSE Promotions and Awareness

3.23.11 Techniques

Audio-visual / Written (notice boards, newsletters) / face-to-face / pictorial techniques will be used to

promote and increase awareness of HSE amongst the staff and workers. The following promotion and

awareness programmes shall be incorporated within the contract.

HSE presentations during site meetings, by Safety Officer

HSE Poster /Slogan Competition (yearly by Safety Officer)

HSE Newsletters / Notices

Talks on control of waste disposal (particularly hazardous waste)

HSE promotion and awareness activities shall be in the language of the workforce.

3.24 Employee Orientation Programme

Contractor will conduct HSE Induction courses for all the personnel reporting to the site. There will

be two modules of HSE Induction, one for Senior and the other for the junior employees. The Safety

Officer will maintain the records of the trained personnel.

New Employees

The supervisors of the new employees will improve their working practices and shall coach them.

HSE Legislation

The Company and its Sub-contractors will comply with the following:

HSE legislation

Government regulations on Safety, Health and Environment, codes and standards

HSE Management System & Procedures

Client’s HSE regulations, codes and standards

National Codes



3.24.1 Entry in to confined space, sewer and manhole

3.24.2 Hazards

Personnel engaged in operation and maintenance of sewerage systems including sewage pumping

stations are exposed to different types of occupational hazards like physical injuries, injuries caused

by chemicals and radioactive wastes, infection caused by pathogenic organisms in sewage and

dangers inherent with explosive or noxious vapours and oxygen deficiency.

The health and safety of personnel can be safeguarded to a great extent by taking the likely hazards

into consideration at the time of designing the sewers, sewer appurtenances and pumping stations.

Hazards which are still possible in spite of due consideration being at the design stages can be reduced

by use of safety equipment and precautions appropriate for each hazardous condition. Finally to guard

against human error and carelessness, proper job instructions and adequate effective supervision by

competent personnel are most essential.

3.24.3 Gases in sewerage system

Sewer gas is a mixture of gases in sewers and manholes containing abnormally high percentage of

carbon dioxide, varying amounts of methane, hydrogen, hydrogen sulphide and low percentages of

oxygen caused by septic action through the accumulation of organic matter inside the sewer. The

actual hazard is due to the presence of high levels of methane forming an explosive mixture of the

oxygen deficiency of hydrogen sulphide in excess of permissible levels. Sometimes trade wastes may

also contribute to other gases like chlorine, ammonia, sulphur dioxide etc.

A noxious gas or vapour is any gas or vapour that is directly or indirectly injurious or destructive to

the health or life of human beings. It can be a simple asphyxiate, chemical asphyxiate, irritant volatile

solvent or a combustible gas.

Simple asphyxiates are the physiologically inert gases lime nitrogen, carbon dioxide, methane and

hydrogen which when breathed in high concentrations act mechanically by excluding oxygen.

Chemical asphyxiates are substances like carbon monoxide which by combining with the

haemoglobin of the blood or with some constituents of the tissues either prevent oxygen from

reaching the tissues or prevent the tissues from using it.

Irritants ate substances like chlorine which injure the air passage and lungs and induce inflammation

in the surface of the respiratory tract.

Volatile solvents and drug-like substances exert little or no effect on the lungs but affect the nervous

system inducing anaesthesia. Inorganic and organic metallic poisonous substances in a volatile from

prove toxic after their absorption into body.



Combustible vapours will burn as long as they are in contact with flame, spark or a heated material

having a temperature equal to or greater than the ignition temperature or the gas or vapour provided

there are enough oxygen present for combustion. The reaction of the gas or vapour with the oxygen of

the air, resulting in progressive combustion, or propagation of flame occurs only when the

concentration of the gas or vapour is within certain limits expressed as percentage of gas or vapour in

air by volume. These limits are called explosive limits. Outside these limits local combustion may

occur at the source or ignition but there will be no propagation of flame and hence the combustion

ceases on removal of the source of ignition. Within the limits, along with the propagation of the flame

through the mixture there will be development of pressure leading to violent explosion.

Precautions

3.24.4 Traffic control

Place easily readable and clear warning signs well ahead of work area.

Fence of adequate space around the manhole for placing equipment and deposition of silt

removed.

Place barricades or signs to canalize the traffic, if possible.

Vehicles can be parked between the traffic and the work area.

Use a flagman at two ends for controlling flow of traffic from each direction and to avoid a

traffic jam, if the road is narrow and only one lane of traffic is possible.

3.24.5 Light arrangement at Barricading

3.24.6 Manhole Safety

Ventilate the sewer line by opening two or three manholes on both the side where the work is to be

carried out. This is more important when adequate lowers for ventilating sewers are not available. The

manholes should be opened at least one hour before start of operations. The opened manholes should

be properly fenced to prevent any person, especially children, accidentally falling into the sewer.

Dummy covers with BRC welded fabric can be used.

Where it is desirable to use the blowers ,operate these for at least 30 minutes before start and

during cleaning operations to ventilate the lowest working levels.

Mandatory to follow permit to work system (PTW).

Use safety harness and life line before entering the sewer line. Two Helpers at the top must

send signals at every few minutes interval to the person in the manhole to ensure safety.

Test for hazardous gases before entry of a person into the sewer line and also in between if

the operations are for longer time.

Test manhole rungs or steps for structural safety before using.

Ensure that no material or tools are located near the edge which can fall into the manhole and

injure the workman.



Lower all tools to the workman in a bucket.

Use lighting equipment which must be explosion and fire proof.

Use Gas Masks when men have to enter into the sewer line.

3.24.7 Infection

The personnel working in sewerage maintenance system are prone to infections and hence the

following precautions should be taken:

i. Emergency first aid treatment kits shall be provided to take care of all minor injuries like cuts

and burns.

ii. A physician’s services should be available for emergencies.

iii. The workers should be educated about the hazards of waterborne diseases such as typhoid and

cholera through sewage and tetanus though cuts and wounds. Preventive inoculations should

be given periodically to the workers.

iv. The importance of personal hygiene should be emphasized and the workers should be

instructed to keep finger nails short and well-trimmed. Wash hands with soap and hot water

before taking food and to keep fingers out of nose. Mouth and eyes. Because the hands carry

most infections.

v. Use the rubber gloves should be insisted so that sewage or sludge does not come in direct

contact with the hands.

vi. The workers should be provided with a complete change of work clothes to be worn during

working hours. Gum boots should also be provided for the workers.

vii. In laboratory work, only pipettes with rubber teats should be used to prevent contamination of

the mouth. Laboratory glassware should not be used for drinking purposes. In no event food

should be prepared in the laboratory.

3.24.8 Precautions of pumping stations

Guards, shields, fencing, railings, enclosures should be designed to help prevent slipping,

falling or contacting machinery while in operation. Replace or repair if they are missing or

damaged. When removed install a temporary safety barrier.

When dealing with equipment :

(i) Always stop the machine before removing any guard.

(ii) See that power supply to the equipment is cut off. Place a warning board on the switch so that

somebody does not accidentally put it on.

(iii) Hoisting equipment should be able to lift the required load. Temporary support should be

given to any machine or equipment jacked or hoisted up before going under it.

(iv) Keep tools in bag or in a belt and not on the floor.

(v) When lubricating a machine in operation, fittings should be at least 30cms. From any moving

part or piped outside a guard

(vi) If oil or grease is split, clean up at once.



3.24.9 Precautions against electrical shocks

Only qualified and specially trained personnel should be allowed to operate and maintain

electrical equipment at the pumping stations.

All electrical controls should be kept dry and in good condition.

No metal ladders or metal tapes should be around electrical equipment.

Insulated rubber mats should be provided before all electrical control panels and it should

be kept dry.

Always test wires for current before wording on any electrical item. Use tools with insulated

handles and rubber gloves.

3.24.10 Equipment

The various safety equipment that are normally required in sewer maintenance work are gas masks,

oxygen breathing apparatus, portable lighting equipment, non-sparking tools, portable air blowers,

safety belts, inhalators and diver’s suit. The use of the particular safety equipment is governed by the

detection of various gases and oxygen deficiency. Knowledge of the type of gases in the atmosphere

and of the working location becomes essential for the selection of the right type of safety equipment.

Equipment and simple tests for detection of various gases and oxygen deficiency.

3.24.11 Gas masks

General purpose gas masks are used for respiratory protection from low and moderately high

concentrations of all types or toxic gases and vapours present in the atmosphere in which here is

sufficient oxygen to support life. Masks afford necessary respiratory protection under many

circumstances but it is most important to know the limitations of the various types available and to be

familiar with their use. Even masks are used properly; other precautions of the various types available

and to be open flames or creating sparks in the presence of inflammable gases must take. The general

purpose gas mask affords protection against organic vapours, acid gases, and carbon monoxide up to 2

percent concentration, toxic dusts, fumes and smoke. The gas mask consists of a face piece, a canister

containing purifying chemicals, a timer for showing duration of service and a harness for support.

Protection against specific contaminants can be achieved by the selection of appropriate canisters.

Persons using gas masks should practice regularly with them in order to become proficient in putting

them on quickly and breathing through them. Gas masks cannot be used in oxygen deficient

atmospheres, in unventilated locations or areas where large concentrations of poisonous gases exist.

3.24.12 Breathing apparatus

This is designed for respiratory protection from atmosphere that contains very high concentrations of

toxic gases and vapours or that are deficient in oxygen. It fully protects a worker against all gases,

vapours, dust, fumes, smokes and oxygen deficiencies and can be safely used in petroleum vapours

and is the most dependable device for work in atmospheres normally encountered in sewage works.



3.24.13 Portable lighting equipment

The equipment normally used are portable electric hand lamps of permissible types, electric cap lamps

and explosion proof flash lights.

3.24.14 Non sparking tools

These are made of an alloy (containing atleast 80 percent of copper) that will not spark when struck

against other objects and metals and yet retains the necessary strength and resistance to wear.

3.24.15 Portable air blowers

Forced ventilation manholes, pits and tanks can be provided by portable air blowers. Special

precautions should be taken to ensure that the blower do not serve as a source or ignition for

inflammable gases. Such precautions shall include placing of the blower upwind from the manhole or

at right angles to the wind direction and atleast 2 m away from the opening. The use of such

equipment requires a consideration of the depth of the manhole, size of enclosure and he number of

openings to uncontaminated atmosphere. Trailer mounted blower having a capacity of 210 m3/min

can ventilate easily many metres of medium sized sewers.

3.24.16 Safety Belt

This consists of a body belt with a buckle and a shoulder harness. The life line is of high grade spliced

manila rope, nylon rope or a steel cable anchored with rings on each side of the belt and provided with

safety straps for anchoring or securing to a stable support. The life line should be about 15 m in length

and the overall assembly should be capable of withstanding a tensile load of 2,000 Kg. The safety belt

and life line should be tested by lifting the wearer clear of ground before each day’s use.

3.24.17 Inhalators

Approved inhalators employing a mixture of oxygen and carbon dioxide are used for resuscitating

victims of gas collapse, drowning or electric shock. Artificial respiration should be started at once on

the patient and an inhalator face piece attached to the victims mouth as soon as the equipment can be

made ready. The carbon dioxide used in small percentages stimulates deep breathing so that more

oxygen may be inhaled. Pure oxygen should be used only when irritant gases such as hydrogen

sulphide or chlorine have caused the victim’s collapse.

3.24.18 Diver’s Suit

A good quality diver suit should be provided to the diver whose services are very necessary while

plugging the sewer line or removal of some hard blockage due to stone etc. at the mouth of the pipe in



the manholes. Depending upon the site condition, suit should have provision to connect an airline with

compressor or oxygen cylinder.

3.24.19 Reactive Safety Practices

An up-to-date record of the fatal injuries, injuries causing permanent disabilities and those causing

temporary and total disabilities n the sewerage industry may not be available. However, it is known

that the number of such injuries is large. Besides pain and suffering caused, the financial cost to the

injured and the authorities is tremendous. Hence, there is a need for a safety practice programme.

3.25 Safety Practice Programme

It is necessary that a person in the authority responsible for sewerage facilities should be made

responsible for the programme. In a smaller authority, it may be the Engineer or Superintending In

charge of the works while in large organizations, a person who can devote part or full time to the job

may be so designated.

The safety practice programme would provide :

3.25.1 Keeping Records of Injury

This is most important. Special formats can be worked out and it may include for the following:

(i) Accident report

(ii) Description of the accident

(iii) Report of Doctor

(iv) Corrective action taken

(v) Accident analysis

3.25.2 Searching out Hazards

The person responsible for the programme must constantly review and look out for hazards that may

be responsible for injury to a workman. Safety manuals, insurance company’s policy brochures etc.

are some of the sources from which information can be gathered.

3.25.3 Safe Equipment, Working Methods

It is necessary to eliminate causes due to which accidents occur by replacement of faulty equipment or

provision of safety equipment. Methods of working or site conditions can be improved. Protective

equipment like helmets, boots, gloves etc., should be provided.



3.25.4 Motivation and Training

It is necessary that the employees are motivated to get them trained in the safety practice programme.

3.25.5 Changing Working Habits

While a job may be done in several ways, it is necessary to identity and insist on a safe method. This

would include proper use of tools i.e. selecting the right tool and using it properly. Good footing to

prevent slipping, not using tools near moving machinery, not leaving tools at high places where they

may fall of a workman below are some examples of working habits.

3.26 Emergency Response Procedures

3.26.1 Coverage

Contractor shall prepare ‘Emergency Response and Evacuation Procedure’ separately under

assistance of the client. It will cover following emergencies:

Fire / explosion

Accident of serious nature

Floods

Man lost

Radiation Leak

Storm & lightening with rain

The ‘Emergency Response & Evacuation Procedure’ will be available with Safety Officer.

3.26.2 Emergency Drills

Emergency Drills shall be conducted every month at least at one working site, to test the proficiency

of the workforce to handle the specific emergency. Each drill will be agreed upon with the client site

representative prior to the drill. However, the drills will be carried out without warning, thereby

demonstrating preparedness for response. The Safety Officer will maintain report of the emergency

drills. Any action points arising out of the drill will be discussed with the Engineer-in-Charge and

concerned employees and then the corrective actions shall be taken.

End of Part 3