moh-mowe sewer.pdf

TOC -i

Table of Contents

Page PART 1: GENERAL REQUIREMENT 1

SECTION 1.01 FORMAT AND REFERENCING .............................................. 1 1.01.1 FORMAT OF SPECIFICATIONS .......................................................... 1 1.01.2 REFERENCING ..................................................................................... 2 SECTION 1.02 ABBREVIATIONS AND DEFINITIONS OF TERMS ............. 3 1.02.1 ABBREVIATIONS .................................................................................... 3 1.02.2 DEFINITIONS .......................................................................................... 6 SECTION 1.03 SCOPE AND CONTROL OF WORKS ................................... 8 1.03.1 INTENT OF CONTRACT ........................................................................ 8 1.03.2 SILENCE OF SPECIFICATIONS ......................................................... 8 1.03.3 CONTRACTOR'S WORK AREAS ........................................................ 8 1.03.4 WATER SUPPLY ..................................................................................... 9 1.03.5 ELECTRICITY SUPPLY.......................................................................... 9 1.03.6 EXISTING UTILITIES AND OTHER OBSTRUCTIONS .................... 10 1.03.7 SIGN BOARDS .................................................................................... 14 1.03.8 SURVEYING EQUIPMENT .................................................................. 14 1.03.9 SETTING OUT OF WORKS ............................................................... 15 1.03.10 HAUL ROUTES FOR HEAVY VEHICLES ....................................... 16 1.03.11 SCAFFOLDING AND FALSEWORK .................................................. 17 1.03.12 USE OF EXPLOSIVES ..................................................................... 17 1.03.13 FIRE FIGHTING EQUIPMENT ......................................................... 18 1.03.14 PHOTOGRAPHIC RECORDS OF CONSTRUCTION .................... 18 1.03.15 SITE CLEANING AND FINAL CLEAN UP ........................................ 19 SECTION 1.04 TEMPORARY WORKS .......................................................... 20 1.04.1 SCOPE ................................................................................................. 20 1.04.2 DESIGN REQUIREMENTS ................................................................. 20 1.04.3 AGREEMENT OF PROPERTY OWNERS .......................................... 20 SECTION 1.05 CONTROL OF MATERIALS AND STANDARDS FOR

SAMPLING AND TESTING ............................................................... 21 1.05.1 STORAGE OF MATERIALS ............................................................... 21 1.05.2 HANDLING MATERIALS ...................................................................... 21 1.05.3 MATERIALS SUPPLIED BY EMPLOYER ........................................... 21 1.05.4 LOCAL MATERIAL SOURCES ............................................................ 21 1.05.5 SOURCES OF SUPPLY AND QUALITY REQUIREMENTS ............ 22 1.05.6 CERTIFICATES OF GUARANTEE AND PRODUCTION PLANT

INSPECTIONS ................................................................................. 22 1.05.7 SAMPLING AND TESTING PROCEDURES ..................................... 22 1.05.8 SAMPLING AND TESTING STANDARDS ........................................ 24 1.05.9 UNACCEPTABLE MATERIALS .......................................................... 25 SECTION 1.06 CONTRACTOR'S PLANT AND EQUIPMENT ...................... 26

Technical Specification For Sewer Network

TOC -ii

1.06.1 GENERAL ............................................................................................. 26 1.06.2 CONTRACTOR'S SCHEDULE OF PLANT AND EQUIPMENT ...... 26 1.06.3 PROVISION AND USE OF PLANT AND EQUIPMENT ................. 26 SECTION 1.07 MEASUREMENT PROCEDURES ..................................... 27 -+1.07.1 GENERAL ......................................................................................... 27 1.07.2 MANUFACTURED ITEMS ................................................................ 27 1.07.3 FITTINGS AND ACCESSORIES ........................................................ 27 1.07.4 WEIGHT MEASUREMENTS ............................................................. 28 1.07.5 LINEAR AND AREA MEASUREMENTS ........................................... 28 1.07.6 VOLUME MEASUREMENTS IN VEHICLES ................................... 28 1.07.7 EARTHWORK VOLUME MEASUREMENTS .................................. 29 SECTION 1.08 TEMPORARY FACILITIES .................................................. 30 1.08.1 GENERALLY ........................................................................................ 30 1.08.2 TEMPORARY SITE FACILITIES ...................................................... 31 1.08.3 CONTRACTOR'S TEMPORARY BUILDINGS ................................ 32 1.08.4 TEMPORARY SERVICES ................................................................. 32 1.08.6 DIVERSION OF PUBLIC UTILITY SERVICES ............................... 33 SECTION 1.09 SAFETY PRECAUTION MEASURES ................................. 35 1.09.1 GENERAL ............................................................................................. 35

PART 2: EXCAVATION AND BACKFILLING ..............................36 SECTION 2.01 SCOPE ................................................................................. 36 SECTION 2.02 SITE CLEARING ................................................................... 37 2.02.1 CLEARING AND GRUBBING .................................................................. 37 2.02.2 REMOVAL OR REALIGNMENT OF OBSTRUCTION AND

UTILITIES .......................................................................................... 37 SECTION 2.03 EXCAVATION ...................................................................... 38 2.03.1 GENERAL ............................................................................................. 38 2.03.2 TOP SOIL ........................................................................................... 38 2.03.3 EXCAVATING ...................................................................................... 38

2.03.4 DISPOSAL OF MATERIALS ........................................................................ 41 2.03.6 ROAD EXCAVATION (FOR PREPARATION OF SERVICE ROADS

ALONG PIPELINES) ........................................................................ 43 2.03.7 EXCAVATION FOR STRUCTURES ................................................ 46 2.03.8 EXCAVATION FOR PIPE TRENCHES ............................................. 49

2.03.9 TECHNICAL SPECIFICATIONS OF THRUST BORING ..................... 52 SECTION 2.04 SOIL FILLING AND BACKFILLING FOR STRUCTURES 57

2.04.1 SCOPE ............................................................................................. 57 2.04.2 FILLING MATERIAL AND BORROW MATERIAL ......................... 57 2.04.3 BACKFILLING FOR STRUCTURES ............................................... 58 2.04.4 EMBANKMENT CONSTRUCTION ................................................ 63 2.04.5 PIPE BEDDING MATERIAL AND BACKFILLING FOR PIPE

TRENCHES ....................................................................................... 70 SECTION 2.05 SUBGRADE CONSTRUCTION ......................................... 74 2.05.1 GENERAL ............................................................................................. 74


TOC -iii

2.05.2 MATERIALS .......................................................................................... 74 2.05.3 WORKMANSHIP .................................................................................. 75 SECTION 2.06 GABIONS ............................................................................... 77 2.06.1 GENERAL ............................................................................................. 77 2.06.2 MATERIALS .......................................................................................... 77 2.06.3 CONSTRUCTION ................................................................................. 78 SECTION 2.07 STONE PITCHING IN CONCRETE ..................................... 79 2.07.1 GENERAL ............................................................................................. 79 2.07.2 MATERIALS .......................................................................................... 79 2.07.3 PLACING ............................................................................................. 79 SECTION 2.08 GEOTEXTILES ...................................................................... 81 2.08.1 GENERAL ............................................................................................. 81 2.08.2 MATERIAL .......................................................................................... 81 2.08.3 WORKMANSHIP .................................................................................. 82

PART 3: PAVEMENT AND ROADS SURFACE FINISHING . 83 SECTION 3.01 SCOPE .................................................................................. 83 SECTION 3.02 GRANULAR SUBBASE AND BASE COURSES ................. 84 3.02.1 GENERAL ............................................................................................. 84 3.02.2 MATERIALS .......................................................................................... 85 3.02.3 CONSTRUCTION ................................................................................. 87 SECTION 3.03 BITUMINOUS LAYERS ....................................................... 89 3.03.1 GENERAL ..................................................................................................... 89 3.03.2 MATERIALS AND REQUIREMENTS FOR BITUMINOUS

COURSES ......................................................................................... 89 3.03.3 CONSTRUCTION ....................................................................................... 93 SECTION 3.04 PAVEMENT REPAIRS AND TRENCH REINSTATEMENT

WORKS ............................................................................................ 96 3.04.1 GENERAL .......................................................................................... 96 3.04.2 ASPHALTING .................................................................................... 96 3.04.3 MATERIALS ...................................................................................... 97 3.04.4 CONSTRUCTION AND REPAIR WORKS ...................................... 97

SECTION 3.05 CURBS, GUTTERS, SIDEWALKS AND PAVED MEDIANS 100 3.05.1 GENERAL ............................................................................................... 100 3.05.2 MATERIALS AND PRECAST MANUFACTURE .............................. 100 3.05.3 CONSTRUCTION AND INSTALLATION ............................................ 102 SECTION 3.06 MAINTENANCE OF TRAFFIC AND DETOURS ................ 109 3.06.1 GENERAL ............................................................................................... 109 3.06.2 MAINTENANCE AND PROTECTION OF TRAFFIC ....................... 109

PART 4: PIPE WORKS AND NETWORK ACCESSORIES . 112 SECTION 4.01 SCOPE ................................................................................... 112 SECTION 4.02 GENERAL REQUIREMENTS .............................................. 113 4.02.1 GENERAL ............................................................................................... 113 4.02.2 SEQUENCE OF CONSTRUCTION ..................................................... 113


TOC -iv

4.02.3 RIGHT OF WAY (ROW) ...................................................................... 114 4.02.4 MATERIALS, PRODUCTS SUPPLY AND HANDLING .................. 115 SECTION 4.03 PIPES, FITTINGS AND ACCESSORIES .......................... 121 4.03.1 MATERIALS ......................................................................................... 121 4.03.2 CONSTRUCTION AND INSTALLATION ........................................... 131 4.03.3 PIPE WORK TESTING ................................................................................... 134

SECTION 4.04 VALVES, HOUSE CONNECTIONS AND SUNDRY WORKS 140

4.04.1 GENERAL ............................................................................................ 140 4.04.2 VALVES .............................................................................................. 140 4.04.3 HOUSE CONNECTIONS FOR SEWER NETWORKS ..................... 143 4.04.4 JOINTING MATERIALS AND ADAPTORS ....................................... 144 4.04.5 VALVE ACCESSORIES ...................................................................... 147 4.04.6 CONSTRUCTION AND INSTALLATION ........................................... 147 4.04.7 RECORDS ......................................................................................................... 149 SECTION 4.05 BEDDING, SURROUND, HAUNCHING, ENCASEMENT

AND THRUST BLOCKS .................................................................. 153 4.05.1 GENERAL ............................................................................................ 153 4.05.2 MATERIALS ......................................................................................... 153 4.05.3 WORKMANSHIP ................................................................................. 153 SECTION 4.06 MANHOLES AND CHAMBERS ........................................... 155 4.06.1 GENERAL ............................................................................................ 155 4.06.2 MATERIALS ......................................................................................... 155 4.06.3 CONSTRUCTION AND INSTALLATION ........................................... 157

PART 5: CONCRETE WORKS ................................................................. 164 SECTION 5.01 CONCRETE AND CONCRETE MIXES AND TESTING .... 164 5.01.1 GENERAL ........................................................................................ 164 5.01.2 MATERIALS .................................................................................... 164 5.01.3 DEFINITIONS .................................................................................. 178 5.01.4 CONCRETE STRENGTH REQUIREMENTS ...................................... 5.01.5 COMPOSITION OF CONCRETE ....................................................... 5.01.6 REQUIREMENTS FOR COMBINING MATERIALS .......................... 5.01.7 READY-MIXED CONCRETE AND CENTRAL MIXED CONCRETE ......................................................................................................... 18

SECTION 5.02 CONCRETE HANDLING, PLACING AND CURING ......... 193 5.02.1 GENERAL ........................................................................................ 193 5.02.2 MATERIALS .................................................................................... 193 5.02.3 PLACING ....................................................................................... 193 5.02.4 COMPACTING ............................................................................... 198 5.02.5 CURING ......................................................................................... 201 5.02.6 HOT WEATHER CONCRETING .................................................. 204 5.02.7 COLD WEATHER CONCRETING ................................................. 207 5.02.8 NIGHT CONCRETING .................................................................... 208 SECTION 5.03 STEEL REINFORCEMENT AND FIXING .......................... 209

5.03.1 GENERAL ........................................................................................... 209


TOC -v

5.03.2 MATERIALS ........................................................................................ 209 5.03.3 CONSTRUCTION ............................................................................... 210 SECTION 5.04 FORMS, FORMWORK AND FALSEWORK ...................... 214 5.04.1 GENERAL ........................................................................................ 214 5.04.2 DEFINITIONS .................................................................................. 214 5.04.3 MATERIALS ..................................................................................... 215 5.04.4 DESIGN ........................................................................................... 216 5.04.5 FINISHES ....................................................................................... 220 5.04.6 TOLERANCES ................................................................................ 222 5.04.7 CONSTRUCTION REQUIREMENTS ........................................... 222 5.04.8 REMOVAL OF FORMWORK AND FALSEWORK ...................... 223

SECTION 5.05 PLAIN AND REINFORCED CONCRETE STRUCTURES 225 5.05.1 GENERALLY ...................................................................................... 225 5.05.2 MATERIALS ........................................................................................ 225 5.05.3 CONSTRUCTION ............................................................................... 226 SECTION 5.06 WATERPROOFING FOR STRUCTURES ....................... 231 5.06.1 GENERAL ........................................................................................... 231 5.06.2 MATERIALS ........................................................................................ 231 5.06.3 SURFACE PREPARATION ............................................................. 235 5.06.4 INSPECTION, DELIVERY AND STORAGE ................................... 235 5.06.5 CONSTRUCTION ............................................................................... 236 SECTION 5.07 JOINT SEALING AND JOINT FILLER ............................... 240 5.07.1 GENERAL ........................................................................................... 240 5.07.2 MATERIALS: JOINT SEALING COMPOUNDS .............................. 240 5.07.3 PREFORMED EXPANSION JOINT FILLER .................................. 243 5.07.4 CERTIFICATE OF GUARANTEE ...................................................... 243 5.07.5 CONSTRUCTION ............................................................................... 244


TOC -vi

List of Tables Page

PART 2 : EXCAVATION AND BACKFILLING

Table 2.1 : Soil Suitable for Embankment .................................................................. 63 Table 2.2 : Rock Suitable for Embankment ............................................................... 64

PART 3 : PAVEMENT AND ROADS SURFACE FINISHING

Table 3.1 : Job Mix Formula ....................................................................................... 92 Table 3.2 : Surface Tolerances ................................................................................. 92 Table 3.3 : Tests for Bituminous Pavements: Minimum Tests Required ..................... 95

PART 5 : CONCRETE WORKS

Table 5.1.1 : Limits of Gradation for Coarse Aggregates ...........................................172 Table 5.1.2 : Limits of Gradation for Combined Aggregates ........................................173 Table 5.1.3 : Maximum Permitted Impurities in Non-Potable Water ............................176 Table 5.1.4 : Concrete Class and Design Mixes .........................................................180 Table 5.1.5 : Grading for No-Fines Concrete .............................................................181 Table 5.1.6 : Preliminary Tests for Stretch .................................................................182

Table 5.2.1 : Selection of Poker Diameter for Size of Pour .........................................200 Table 5.2.2 : Normal Curing Periods ..........................................................................205

Table 5.4.1 : Permitted Hardwoods for Load-Bearing Wedges and Packing ................215 Table 5.4.2 : Minimum Period Before Striking for Ordinary Structural Concrete Made with Ordinary Portland Cement ...................................................224

PART 1: General Requirement Technical Specification For Sewer Network

Page 1 of 244

PART 1: GENERAL REQUIREMENT

SECTION 1.01 FORMAT AND REFERENCING

1.01.1 FORMAT OF SPECIFICATIONS

A. Part

A.1 This Specification is divided into Parts. Each Part is designated by a single or double digit number followed by a title. (Part 1 General Requirements)

B. Section

B.1 Each Part is divided into Sections. Each Section is designated by the Part number, a decimal point and a 2-digit sequential number, followed by a title. (Section 1.01 Format and Referencing)

C. Subsection

C.1 Each Section is divided into Subsections. Each Subsection is designated by the Part number, a decimal point and a 2-digit Section number, a decimal point and a single or double digit number followed by a title. (1.01.1 Format of Specifications)

D. Clause

D.1 Each Subsection may be divided into Clauses. Each Clause is designated by sequential alphabetic letters and a decimal point. (D.)

E. Item

E.1 Each Clause may be divided into items. Each Item is designated by the Clause letter, a decimal point and a single or double digit sequential number, followed (if required) by a title in lower case lettering. The text then normally follows on the same line (E. 1).


Page 2 of 244

1.01.2 REFERENCING

A. The Specifications for Items in the Bills of Quantities are prescribed in the respective Section/s corresponding to the type of Works involved.

B. Al l the provisions of these Section/s shall be construed as Specifications for such Items of Work, except in respect of those provisions clearly inapplicable in the context in which they appear or unless they are waived or modified in the Contract Documents or by Variation Orders.

C. Specifications and Drawings may contain cross references to other Sections, Clauses, Items, etc., which shall likewise be construed as Specifications for the Item of Work involved.

D. Any references in the Specification to Work or materials not required wil l be deemed inapplicable.


Page 3 of 244

SECTION 1.02 ABBREVIATIONS AND DEFINITIONS OF TERMS

1.02.1 ABBREVIATIONS

A. Interpretation

A.1 Wherever the following abbreviations of titles, terms and units of measurement are used in the Specifications or on the Drawings, the intent and meaning shall be interpreted as described hereunder.

B. Titles and Terms

B.1 AASHTO - American Association of State Highway and Transportation Officials:

Acrylonitrile-Butadiene-Styrene American Concrete Institute American Institute of Steel Construction American Iron and Steel Institute American National Standards Institute American Petroleum Institute American Society for Testing and Materials Average American Wire guage American Welding Society American Water Works Association bitumen/bituminous

British Standard bituminous slurry seal coat bituminous surface treatment circuit breaker

California Bearing Ratio concrete Commission Internationale de l'Eclairage double bituminous seal coat Deutsches Institute Fur Normalizieung equivalent

Federal Standard Specification (USA) highway height horizontal: vertical International Electrical Institution of Electrical Engineers (UK)

Commission

ABS ACI AISC AISI ANSI API ASTM AV. AWG AWS AWWA Bit. BS BSSC BST CB CBR conc CIE DBSC DIN Equiv FSS hwy ht H:V IEC IEE


Page 4 of 244

ISO L.L. L.S. max MCCB min MUTCD NEC NEMA NJB pav't P.C. PCC PE P.I. P.L. PTFE PVC qty RC RCP rdwy ROW SBSC S.G. SI Sta SWG TBSC uPVC VDE wgt GRP DI SASO

: International Organization for Standardization : liquid limit limit lump sum : maximum : molded case circuit breaker : minimum (or minute) : Manual on Uniform Traffic Control Devices

National Electrical Code (UK) National Electrical Manufacturers' Association (USA) New Jersey barrier

pavement prime cost

Portland cement concrete polyethylene plasticity index plastic limit Polytetrafluoroethylene polyvinyl chloride quantity reinforced concrete

: reinforced concrete pipe : roadway : right-of-way : single bituminous seal coat : specific gravity : Systeme International D'Unites Station (location

along a survey line) standard wire gauge (UK) triple bituminous seal coat unplasticized polyvinyl chloride Verband Deutscher Electrotechniker weight Class reinforced plastic Ductile Iron Saudi Arabia Standards Organization

C. Units of Measurement

C.1 Throughout the documentation units of measurement are referred to by symbols as follows: - Nr : number - mm : millimeter/s - cm : centimeter/s - m : meter/s


Page 5 of 244

lin.m : km : sq.mm : sq.cm : sq.m ha cu.m gm kg tonne ml ltr Pa N kN MN A : mA : V W kW C Hz rpm km/h sec min h mS dB dBA ppm in. : ft : sq.in : sq.ft : cu.ft lb. psi gal gal(Imp) mph HP USG

linear meter/s kilometer/s square millimeter/s square centimeter/s square meter/s hectare/s cubic meter/s gram/s kilogram/s metric ton (1,000 kg) milliliter/s liter/s Pascal/s Newton/s kilo Newtons mega Newtons amperes

mill i amperes volt/s Watt kilowatt Celsius (Centigrade) Hertz (Frequency) revolutions per minute kilometers per hour

seconds minute/s (or minimum) hour/s mill i Siemens decibel/s

decibels absolute parts per million inch/inches (1 in. = 25.4 mm) foot/feet (1ft = 0.3048 m) square inch/inches

square foot/feet cubic foot/feet pound/s (weight) pounds per square inch gallon/s (U.S.) gallon/s (Imperial)

miles per hour horsepower American gage


Page 6 of 244

1.02.2 DEFINITIONS

A. Wherever in the specification or in other Contract Documents any of the following terms is used, the intent and meaning shall be interpreted as follows:

ACCEPTED - Accepted in writing by the Engineer (or by the Employer where appropriate) as meeting the requirements of the Contract Documents and of any authorized variations thereto. "Acceptance" means accepted in writing as aforesaid. "Acceptable" means acceptable to the Engineer as aforesaid.

ADDENDUM/NOTICE - Amendment of or revision to any of the Contract Documents issued to Tenderers, and which is deemed to form part of the Contract Documents.

APPROVED - Approved in writing by the Engineer, including subsequent written approval or confirmation of previous verbal approval by the Engineer. "Approval" means approval in writing as aforesaid.

CERTIFICATE OF GUARANTEE - A signed statement by a person having legal authority to bind a company or supplier to its product, and which confirms that the materials and test results conform to the standards of these Specifications.

DIRECTED - Directed in writing by the Engineer, including subsequent written direction or confirmation of previous verbal direction by the Engineer.

PRESPLITTING - Establishment of a free surface, or shear plane, in rock cuts, by controlled use of explosives in specially aligned and closely spaced drill holes along the slope line.

SHEATHING - Backfilling to the inside faces of structures such as retaining walls and abutments, using proprietary filter cloth and porous blocks, or using selected, free-draining material such as gravel or noncementitious sand, etc, prior to placing and compacting normal backfill.

SOIL STABILIZATION - Procedure whereby cement, bitumen or lime is added to soils (subgrade layer) or to granular materials (sub-base course) in order to improve their load bearing capacity and their resistance to weathering and displacement.

SUBGRADE - The top surface of embankment or excavated area on which the pavement structure and shoulders are constructed. Also referred to as Subgrade Surface or Subgrade Level.


Page 7 of 244

SUBGRADE LAYER - The top layer of material, of at least 200 mm compacted thickness, immediately below the subgrade surface.

SUBSIDIARY WORKS - Works which are subsidiary to or necessary or essential to, or in support of, or usual to, the execution and completion of other Works.

WORKING DRAWINGS - Shop drawings, steel bending schedules, stress sheets, fabrication and erection drawings, falsework drawings, and any other supplementary drawings or data which the Contractor is required to submit to the Engineer for approval, generally before such Works commence.


Page 8 of 244

SECTION 1.03 SCOPE AND CONTROL OF WORKS

1.03.1 INTENT OF CONTRACT

A. The intent of the Contract is to provide for the construction and completion in every detail and subsequent maintenance of the Works described. The Contractor shall furnish all labor, materials, tools, equipment, transportation, supplies and facilities and shall carry out all Permanent and Temporary Works and all other items necessary for proper completion of the Works in accordance with all requirements of the Contract Documents.

B. Where the Specifications or Drawings describe any portions of the Works in outline only, and not in complete detail, the best general engineering practice shall prevail and only first quality materials and workmanship shall be used.

1.03.2 SILENCE OF SPECIFICATIONS

A. The apparent silence of the Specifications, Drawings or other Contract Documents as to any detail or the apparent omission from them of a detailed description concerning any Works or requirements, shall be regarded as meaning that good engineering practice shall apply and shall be to the approval of the Engineer.

1.03.3 CONTRACTOR'S WORK AREAS

A. The Contractor shall make all necessary arrangements, including payment i f need be, regarding any land outside the Site that may be needed as work areas. The Employer will not acknowledge any liability in respect of such land. The Contractor shall also be responsible for insuring that all roads and temporary facilities needed are sufficient to divert traffic adequately.

B. The Contractor shall locate and select sites outside the right-of-way for the use of his plant, equipment, site offices, residences, Temporary Works or any other uses which are essential during the execution of the Contract. The Contractor shall take the necessary measures for using these sites and shall be responsible for all expenses that may become due in return for such use. Prior to using any land owned by public or private owner outside the Site, the Contractor shall obtain the approval of the concerned Authorities and the Engineer.


Page 9 of 244

C. The Contractor, i f so required by the Engineer, whether before or after completion of the Works, shall remove his constructional plant and duly clean the site and shall, wherever applicable, remedy all damage and pay all monies due to land owners in return for using their land.

D. It is the Contractor's responsibility to verify the stability of side slopes in cut areas by specialized staff. The Contractor, at his own expense shall execute any required site investigation prior to cutting in the relevant areas. The proposal of site investigation program as well the final recommendation should be approved by the Engineer. No direct payment shall be made for this work, all expenses should be included in the Contractor's rates.

E. The Contractor shall inspect the location and the surrounding areas and comprehend all the details related to the type, nature, details, topography and existing services of the location.

The Contractor shall acquire all the information related to risks, dangers, weather conditions and any other related factors that may influence his tender, and no later consideration wil l be made since these expenses should be added by the Contractor on the prices of works and other items.

1.03.4 WATER SUPPLY

A. The Contractor shall be deemed to have executed adequate investigations relating to the availability of water for the purpose of the Works and to have consulted and arranged with the appropriate Authorities and taken into consideration all legal aspects. The Contractor shall be responsible for the supply of sufficient clean, fresh water at all times during progress of the Works, including making temporary arrangements for storing and distributing the water on the Site.

1.03.5 ELECTRICITY SUPPLY

A. The Contractor shall make his own arrangements for the supply of all electrical power and all lighting and electrical equipment required for execution of the Works, including supplies for commissioning engineering services and Plant at required voltages. The Contractor shall also make provisions to store and distribute electrical power and equipment on Site.


Page 10 of 244

B. The Contractor shall provide and maintain adequate efficient lighting for all parts of the Works for safety and security purposes required to facilitate proper execution of work and to illuminate surfaces during finishing work and inspection. Without prejudice to his liability under the General Conditions of Contract, the Contractor shall, with respect to the supply of electricity for power or lighting, take all necessary precautions to ensure the safety of his workmen and others.

C. Permanent electric supply and lighting installations may be used for testing and commissioning and to illuminate the Works, subject to the following conditions:

The Employer does not guarantee that it wi l l be available.

The Contractor must take responsibility for the operation, maintenance and supervision of the system, indemnify the Employer against all damage and pay all costs and renew all used tubes and lamps.

The Contractor must indemnify the Employer against any reduction in the manufacturer's guarantee periods for equipment etc. due to its use before completion of the Works.

1.03.6 EXISTING UTILITIES AND OTHER OBSTRUCTIONS

A. Categories of Obstructions

A.1 Obstructions shall be classified as follows:

Existing private and public owned utilities, above and below ground, which are required to be either protected, adjusted, relocated or removed.

Obstructions, above and below ground (other than utilities), which are required to be taken down, dismantled, demolished or excavated, and removed, as appropriate.

B. Existing Utilities

B.1 Utilities shall include, but not be limited to, existing water lines, gas lines, sewer lines, wire lines, service connections, water and gas meters and valve boxes, light poles and masts, pylons, cableways, signals, and all utility appurtenances within the limits of the proposed construction.


Page 11 of 244

B.1.1 The Contractor shall submit all plans showing existing utilities under earth and their relations with pipelines under construction.

B.1.2 The Employer/Engineer takes no responsibility as to the correctness, accuracy, completeness or validity of information obtained from these Drawings and the Contractor shall be fully responsible for his own interpretation and shall execute whatever additional investigations are necessary to obtain the needed information at the Contractor's own expense.

B.1.3 The costs of all related Works concerning verification and identification of existing utilities including excavating any trial pits, detection means, mapping detailing of drawings and co-ordination with respective Authorities shall be fully borne by the Contractor. Should any relocation of existing utilities, not previously identified by the Contractor, be instructed, or shown on the Drawings, these shall not constitute a change in the Scope of Work, and shall give no grounds for extension to the Time for Completion or for other claims. The relocations, however, will be paid for and valued in accordance with the Contract rates.

B.2 The necessary utility diversions may be specified or directed to be carried out by the Contractor. Alternatively, the Employer may make arrangements for such works to be executed by other parties.

B.3 The Contractor shall:

Take into account that the diversion works shall be carried out to the requirements and approval of the Utility Owners and/or under their supervision, and also where required by the Utility Owners, specialist diversion works shall be carried out by accredited specialist Contractors.

Verify and identify the existing utilities by excavating trial pits and other measures including detection means existing utilities. Coordinate with the relevant Authorities and map these utilities and prepare detailed and accurate existing utilities drawings identifying the utilities that are in service and those that are dead or abandoned. Submit these existing utilities Drawings, that are accurate and detailed giving location of utilities in plan and section with all pertinent data of the respective utility, to the Engineer and to the Utility Owners.

Work out and develop, in coordination with the Utility Owners and the Engineer, the approved utilities diversion schemes that will be required to enable the execution of the Works and also maintain continued utilities services in the Area, and to the users.


Page 12 of 244

Provide superintendence for the execution of the utility diversions whether they are carried out by the Contractor directly or by other parties employed by the Contractor.

Provide accurate As-Built Drawings of all permanent utility diversions that are executed under the Contract.

B.4 The Employer will, in consultation with the Engineer and Contractor, coordinate with all Utility Owners to ensure prompt adjustment, relocation or removal of all affected utilities, including any additional utilities that may be encountered during the Works. The Employer and Engineer will facilitate, to the maximum extent practicable, the Contractor's Work Program, in this respect.

B.5 The Contractor shall take into account, in his Program of Work, the time effort involved in the follow-up and execution of Works pertaining to all utility adjustments, relocations and removals. The Contractor shall schedule construction activities so as to avoid or minimize any potential delays, inconvenience or damage to the Works that may result from utility interference or the operations of adjustment, relocations and removals.

B.6 The Contractor shall follow up the execution of the utility diversions whether they are carried out directly or by other parties employed by the Contractor or directly by the Employer. The Contractor shall, in good time, inform the Employer and the Engineer.

B.7 The Contractor shall be responsible for safeguarding and protecting all utilities and appurtenances encountered during the Works. The Contractor shall be responsible for the costs of making good any damage arising out of its own negligence.

B.8 The execution of the utility diversions should be done by similar materials of equivalent grade or strength as minimum to the materials of the existing utilities and as per the Engineer approval and the utility owners requirements.

B.9 In case it is required to stop the water in the existing network while execution of the utilities diversions or replacement of existing water pipeline, the Contractor should inform the Engineer and coordinate with the water supply authorities in advance by 48 hours. I f the water supply would stop for more than 48 hours, the Contractor should provide temporary service for water supply on his own expenses, either using temporary pipelines or by water tanker or any other way approved by the Engineer. In all cases, the Contractor should get written license from the water supply authority including the required instructions.


Page 13 of 244

B.10 Execution of the water networks diversions should be done as per the water networks specifications stipulated in Section (4) of these specifications. Testing, cleaning and disinfection of the pipelines should be done according to Section (4-3-3) of these specifications.

C. Obstacles

C.1 Obstacles shall include, but not limited to existing buildings, walls, fences, gates, wells, septic tanks, manholes, pits, pipes, culverts, roadways, sidewalks, signs and rubbish dumps, whether or not shown on the Drawings.

C.2 At the commencement of the Contract, the Contractor shall examine the Site and identify/verify all obstacles in the Site above or below ground, and shall record all such information on suitable Site Drawings which shall be submitted to the Engineer within one month of commencement date.

C.3

Harmful gases concentration should be monitored using special gas monitoring devices before and during commencing of the work in septic tanks. Al l laborers entering to the tanks must be provided with full safety tools and gas masks, etc. and the Contractor must provide all first aid tools on site.

Existing Septic Tanks:

I f the pipelines or the house connections cross any existing septic tanks and it was not possible to change the pipeline routing to avoid them, the Contractor should proceed to dry, clean, demolish and backfill those tanks partially or fully.

Wherever possible, only the crossing part of the tank with the water pipeline that wi l l be demolished and backfilled and the rest of the tank should be separated by building a suitable wall to make the tank in a good working condition. Al l precautions should be taken to keep the existing system working and to pump the sewerage from the tanks and to dispose of the sewage according to the local authorities instructions. The sewer water must not be allowed to leak to the water pipelines trenches or the water system.

In case of partial or full demolish, the top slab should be removed either fully or partially and the walls should be lowered at least by 1m below the ground level. Filling should be as per the backfilling specifications in this document.

All of the above requirements should be applied to all existing tanks including those constructed during this pipelines contract and those crossing the pipelines.


Page 14 of 244

C.4

A. Nameboard: The Contractor shall provide suitably sized project nameboards, bearing the names of the Employer and Engineer together with any corresponding logos, the name of the project, the name of the Contractor and such other names and information as the Engineer may request. The design and style of the nameboard shall be submitted to the Engineer for approval prior to fabrication. Nameboards are to be written in English and the local language and erected at suitable locations as directed by the Engineer. Refer to Section 1.08.2 Item G for the nameboard details. As detailed in Section 1.08.2, Item E of the specifications.

Change of Pipeline Rooting Around Tanks:

When existing tank crosses the proposed pipeline, the pipeline routing should be changed i f possible around the tank leaving a 50 cm clear distance between the tank walls and the pipeline. Those pipelines should be covered by plain concrete as per the Engineer recommendations.

The Contractor should prepare detailed drawings for the tank boundaries that cross the pipeline, showing all the connection details that are required to relocate the pipe around the tank. This drawing should be approved by the Engineer prior to construction.

1.03.7 SIGN BOARDS

B. Each sign board shall be erected in a prominent, approved position. Sign boards shall be maintained in good order at all times and sign boards and supports shall be dismantled and removed from the site upon completion of the Works.

C. All sign boards are to comply with the requirements of concerned authorities (Municipality/ Ministry of Transport/Traffic Directorate).

1.03.8 SURVEYING EQUIPMENT

A. The Contractor shall provide sufficient and suitable surveying instruments and other equipment for his own use in setting out and leveling of the Works, and also to enable the Engineer to check the setting out. Furthermore, the Contractor shall provide sufficient chainmen and other assistance as the Engineer may require.

B. The accuracy of survey instruments may be verified at any time by the Engineer and any unsatisfactory instruments shall be promptly calibrated or removed and replaced by the Contractor at its own expense.


Page 15 of 244

C. Upon completion of the Contract, all survey instruments shall remain the property of the Contractor, unless a Pay Item for such instruments is included in the Bills of Quantities, in which case the instruments shall become the property of the Employer.

1.03.9 SETTING OUT OF WORKS

A. The Contractor shall, prior to any setting out, submit a planned method of operations for setting out the Works to the Engineer for his approval. The plan shall include the accuracy, positions of the various types of stakes, method of marking stakes, and methods to be used for protecting stakes, etc. No survey work shall proceed without to the Engineer's approval of the Contractor's plan.

B. The Contractor shall give written notice to the Engineer at least 24 hours before he intends to survey any portion of the Works. Such notice shall include the time, location and type of Works to be set out.

C. Before commencing Work on Site, the Contractor shall carry out a topographical survey of the Site, as directed by the Engineer. This survey shall include such parts of the Site as the Engineer may direct, to record the Site limits, dimensions, ground levels, obstructions and other features and the survey shall establish base lines and points for future setting out and also record the basis for re-measurement of excavation and earthwork, where applicable. The Contractor shall set out the Works, inform the Engineer when setting out is complete and obtain Engineer's approval before proceeding with construction. The Contractor shall provide instruments and assistance for checking the setting out if required by the Engineer. I f , in the opinion of the Engineer, modification of the lines or grade is required, before or after survey, the Engineer will issue detailed instructions to the Contractor who shall revise the setting out accordingly.

D. Setting Out Utility Works shall be as shown on the Drawings or as instructed on Site. Stake-out shall be revised i f , in the opinion of the Engineer, modifications of line or grade are required.

E. The Contractor shall be responsible for preserving all existing stakes, marks and monuments and if any construction stakes or marks are destroyed or disturbed, the Contractor shall replace them at his own expense.

E.1 Record Drawings: The Contractor shall record details of all grid lines, existing ground levels, setting-out stations, bench marks and profiles on the site setting-out drawing. This drawing shall be retained on the Site throughout the duration of the Contract and handed over to the Engineer upon completion of the Works.


Page 16 of 244

E.2 Al l dimensions and levels on the Drawings and the Site, shall be checked particularly the correlation between components and the work in place. Materials and components shall not be ordered, or work carried out, until discrepancies have been resolved with the Engineer.

E.3 Appearance and Fit: The Works shall be constructed to higher levels of accuracy than those specified where it is necessary to achieve a desired appearance and also to ensure that materials, elements, and components of the building fit together as designed. Wherever the accuracy, fit or appearance of the work is likely to be critical, or difficult to achieve, the Contractor shall obtain the Engineer's approval of proposals or of the partially finished work as early as possible.

E.4 Non-Compliance: Work which fails to meet the specified levels of accuracy must not be rectified before the Contractor submits and receives approval of proposed rectification works. Al l additional costs resulting from these rectification works shall be borne by the Contractor.

1.03.10 HAUL ROUTES FOR HEAVY VEHICLES

A. The Contractor shall prepare proposals for routes to be used by heavy vehicles particularly for hauling f il l materials. Routes shall where possible, avoid existing roads and built-up areas. Signs shall be provided and maintained to direct construction traffic to and from haul routes. Details of haul routes and signing shall be submitted to the concerned in Traffic Directorate for approval within a period not exceeding one month prior to the commencement of the Works in the relevant area and the signs shall be erected prior to actual commencement of the Works.

B. I f and where it is necessary for Contractor's plant or vehicles to cross public highways, and where required by the Engineer, all such crossings shall be equipped with manually controlled traffic lights.

D. Stationary vehicles, equipment, huts, stockpiles of materials, etc., shall be kept well clear of crossing points so that persons using the highway and the haul road shall have adequate sight distance at all times.


Page 17 of 244

1.03.11 SCAFFOLDING AND FALSEWORK

A. The Contractor shall provide scaffolding and falsework to facilitate carrying out construction of the Works in the required sequence. Scaffolding and falsework shall be properly designed and constructed specifically for the loads intended. Full details of the proposed arrangements shall be submitted to the Engineer for his approval. Such approval, however, shall not relieve the Contractor of his responsibility with regard to the adequacy of all scaffolding and falsework used in the Works.

1.03.12 USE OF EXPLOSIVES

A. Control Measures

A.1 The Contractor shall not use explosives without the express permission from the controlling Authority. The Contractor shall abide by all rules and regulations of the concerned Authorities regarding purchasing, transportation, storing, handling and using the explosive materials.

A.2 Explosives and detonators shall be stored in special buildings as approved by the concerned Authorities. These secured buildings should be located and clearly marked English and Arabic "DANGER - EXPLOSIVES" as approved by the concerned authorities. Explosives and detonators shall be stored in separate buildings.

A.3 All possible precautions shall be taken against accidental fire or explosion, and to ensure that the explosives and detonators are kept in proper and safe condition.

A.4 Explosives and detonators shall always be transported in separate vehicles and kept apart until the last possible moment. Metallic tools shall not be used to open boxes of explosives.

B. Blasting Procedures

B.1 Ensure that blasting shall only be carried out by experienced shot firers. Priming, charging, stemming and shot firing shall be carried out with greatest regard for safety and in strict accordance with the Rules and Regulations of the concerned Authorities. Adequate warning of blasting shall always be given and all persons cleared from the area, before blasting takes place.


Page 18 of 244

B.2 Ensure that police and other concerned Authorities shall be kept fully informed of the blasting program so that they may be present when blasting takes place i f they so require.

B.3 Ensure that explosive charges are not excessive, charged boreholes are properly protected, and proper precautions are taken for the safety of persons and property. Only the Contractor shall be responsible of people and premises full protection.

C. Explosives Inventory

C.1 The Contractor shall maintain an up-to-date inventory of all explosives and explosive devices and shall submit a monthly report to the Engineer, detailing the use of all explosives by date and location.

1.03.13 FIRE FIGHTING EQUIPMENT

A. The Contractor shall take all necessary measures to prevent personal injury or death or damage to the Works or other property and adequate, fully operational fire fighting equipment shall be furnished and maintained by the Contractor whose workmen shall be trained in the operation of such equipment.

B. Fire fighting arrangements shall be made as required by the local Civil Defense Department and provision of fire fighting facilities in all vulnerable areas and as instructed by the Engineer.

C. Adequate water for fire fighting shall be available and outlets located so as to be readily accessible.

D. Al l equipment shall be regularly tested and properly maintained.

1.03.14 PHOTOGRAPHIC RECORDS OF CONSTRUCTION

A. The Contractor shall submit each month good quality progress photographs of at least 5 different subjects as agreed by the Engineer. For each subject, the Contractor shall supply progress photographs taken from approved locations stations but not less than 20 (twenty) at monthly intervals and submit 3 color prints (gloss finish) not less than size 16cm x 20cm of each negatives and color transparency.


Page 19 of 244

B. Each print and transparency supplied, shall be titled and referenced to a suitable key plan. Prints and negatives shall also be suitably cross referenced.

1.03.15 SITE CLEANING AND FINAL CLEAN UP

A. Site Cleaning During Progress of Works

A.1 Al l parts of the Site, and adjacent roads affected by the Works, shall be maintained in a clean and tidy condition during progress of the Works. All waste and surplus materials and other rubbish resulting from the Works or otherwise, shall be cleared away to locations approved by the Municipalities and Directorate at intervals as directed by the Engineer.

A.2 I f the Contractor fails to remove any surplus or waste materials from the Site within 3 days after being instructed to do so by the Engineer, these materials may be removed by others at the Contractor's expense.

B. Final Clean Up on Completion

B.1 The entire Site shall be delivered up on completion of the Works, in a clean, neat and presentable condition, all as specified hereunder and as described in the General Conditions of Contract.

B.2 Spoil tips, borrow pits and deposited materials shall be trimmed and regularized to profiles and levels as directed. Flow of water courses affected by the tips or pits shall be maintained without interruption and any agreement concerning these sites, existing between the Employer and the persons or Authorities concerned, shall be observed.

B.3 Temporary Markings coverings and protective wrappings shall be removed unless otherwise instructed by the Engineer.

B.4 Partial Possession by Employer: Where the Works are to be completed in sections, and any such section depends for its adequate functioning on work located elsewhere on the Site, such other work shall be completed in time to permit sectional completion as required.


Page 20 of 244

SECTION 1.04 TEMPORARY WORKS

1.04.1 SCOPE

A. The Contractor shall construct, as required, all temporary detour roads, temporary bridges and culverts, and other facilities for his Works or for maintenance of traffic in locations affected by his works.

B. The Contractor shall construct and maintain all detour routes ensuring at all times that the detour routes are signed, striped, lighted, maintained and furnished with all traffic control devices as shown, directed and/or needed. These proposed detours must be submitted to the Engineer for approval.

C. Trench crossings are to be provided for free and safe passage of vehicles and pedestrians over pipe and other trenches.

1.04.2 DESIGN REQUIREMENTS

A. Designs and detailed working drawings for proposed Temporary Works shall be submitted for approval, prior to commencing such Works. The Contractor shall be held responsible for any damage that may result from the Temporary Works.

1.04.3 AGREEMENT OF PROPERTY OWNERS

A. The Contractor shall obtain the agreement of the affected land owners and approval from the Engineer prior to commencing Temporary Works. Such approval shall not in any way relieve the Contractor of his responsibilities expressed in the General Conditions of Contract.


Page 21 of 244

SECTION 1.05 CONTROL OF MATERIALS AND STANDARDS FOR SAMPLING AND TESTING

1.05.1 STORAGE OF MATERIALS

A. Materials shall be so stored as to assure the preservation of their quality and suitability for the Works. Stored materials, approved before storage, may again be inspected prior to their use in the Works. Stored materials shall be located so as to facilitate their prompt inspection.

B. Where materials are stockpiled on Government or private property, such sites shall be abandoned immediately upon consumption of all stockpiled materials and the natural surface shall be restored as far as practicable to the original condition by the Contractor and to the satisfaction of the Engineer.

1.05.2 HANDLING MATERIALS

A. Al l materials shall be handled in such manner as to preserve their quality and suitability for the Works. Aggregates shall be transported to the Works in vehicles, which are constructed to prevent loss or undue segregation of materials after loading and unloading.

1.05.3 MATERIALS SUPPLIED BY EMPLOYER

A. The Contractor shall be responsible for all materials furnished by the Employer and shall make good any shortages or deficiencies, from any cause whatsoever, or any damage which may occur, after delivery of such materials.

1.05.4 LOCAL MATERIAL SOURCES

A. When material sources are not designated on the Drawings, or in other documents, the Contractor shall be responsible for locating and providing suitable materials from approved sources.

B. Any information provided in the tender documents about sources of local materials is considered as a guideline only and does not relieve the Contractor of his responsibility in respect of investigation and supply of suitable materials as specified.


Page 22 of 244

C. Materials, regardless of their source, shall not be incorporated in the Works until approved by the Engineer.

1.05.5 SOURCES OF SUPPLY AND QUALITY REQUIREMENTS

A. Al l materials, including manufactured articles, and machinery incorporated in the Works, shall meet all specified quality requirements and be approved by the Engineer.

B. The Contractor shall, before placing any purchase order for any materials intended for incorporation in the Works, submit for approval a complete description of all such materials, names of the firms from whom he proposes to purchase them and copies of all test reports verifying conformity with the provisions of the Specifications. Materials shall not be ordered without the approval of the Engineer. When directed by the Engineer or otherwise specified, the Contractor shall submit suitable samples for approval.

C. The Engineer shall have the right to retest all materials which have been tested and accepted at the source of supply after delivery to the Site and prior to incorporation into the Works and to reject any such materials which are clearly defective or, when retested, do not conform with the Specifications.

1.05.6 CERTIFICATES OF GUARANTEE AND PRODUCTION PLANT INSPECTIONS

A. Al l shipments of materials shall be accompanied by a Certificate of Origin and a Manufacturer's Certificate of Guarantee or Test Certificate from an approved independent qualified laboratory approved by the Engineer. Al l certified materials delivered to the Site shall undergo additional laboratory testing i f required by the Engineer.

B. Issuance of an invalid or erroneous Certificate of Guarantee shall be just cause for rejection of the materials without further testing.

1.05.7 SAMPLING AND TESTING PROCEDURES

A. Sampling

A.1 Samples of all materials shall be submitted to the Engineer for inspection, testing and acceptance before incorporation in the Works. All materials being used will be subject to inspection, testing, or rejection at any time prior to such incorporation.


Page 23 of 244

A.2 Where untested and unaccepted materials have been used without approval of the Engineer, such use shall be at the Contractor's risk.

B. Source Tests

B.1 Al l source samples shall be taken by the Contractor in the presence of the Engineer, using approved sampling procedures. Al l source approval tests shall be performed under the supervision of the Engineer or, when so specified, by an independent laboratory approved by the Engineer and engaged by the Contractor.

B.2 After approval of any source of materials, the Contractor shall produce from such source only to the extent that materials produced are of substantially the same quality as the approved samples.

B.3 The Engineer wi l l periodically order retesting of previously approved sources to verify that they continue to conform to the Specifications and may order retesting at the same or at a different laboratory from the one performing the original source approval tests. I f retesting indicates that a previously approved source no longer conforms with the Specifications, the Contractor shall forthwith cease production from such source.

C. Job Control Tests

C.1 Job control tests shall be performed by the Contractor prior to submitting any materials to the Engineer for approval. The Contractor shall submit details to the Engineer of his job control testing program.

C.2 The Engineer may declare the Contractor's job control testing program unacceptable i f frequent rejections of submitted materials occur when subjected to the Project Control Tests.

D. Project Control Tests

D.1 Al l Project Control samples shall be taken jointly by the Engineer and the Contractor. Tests shall be performed in the Site Laboratory, or in situ as appropriate, under the supervision of the Engineer.


Page 24 of 244

D.2 The Engineer may order retesting of any material i f there has been a significant delay in the construction operations or i f he determines that the material has deteriorated since its original acceptance. Material which does not conform with the Specifications wil l be rejected and shall be removed from the Works and replaced or corrected by the Contractor. The Engineer may order additional testing to ascertain the extent of unacceptable material.

E. Check Tests

E.1 The Engineer may periodically order check tests to verify the accuracy of Project Control testing and equipment. The Engineer may direct that check tests be performed by qualified persons other than those normally responsible for Project Control testing, or he may direct that the samples be sent to the Employer's Central laboratory or to an approved independent laboratory for testing.

E.2 The Contractor shall provide the Engineer with all necessary Test Report forms and expendable materials required to perform all required tests. Copies of all test results will be issued to the Contractor.

1.05.8 SAMPLING AND TESTING STANDARDS

A. Standards to be Supplied

A.1 The Contractor shall, at the commencement of the Contract, furnish for use on site by the Engineer and the Contractor one complete set of the following standards. The set shall become the property of the Contractor upon completion of the Works.

A.1.1 AASHTO Standard Specifications for Transportation Materials and Methods of Sampling and Testing (Part I : Specifications, and Part I I : Tests).

A.1.2 ASTM Standards for Testing and Materials: Section 00 plus all Volumes in Sections 1 to 6 inclusive, plus Specifications, as required, from Sections 7 to 15 inclusive.

A.1.3 British Standards referred to in the Specification

A.1.4 SASO Standards.


Page 25 of 244

A.1.5 DIN

A.1.6 ISO

A.1.5 All other relevant Standards referred to in the Specifications.

B. Precedence of Materials and Testing Specifications

B.1 Al l references to methods of testing or specifications of AASHTO, ASTM and others will be deemed to refer to the latest methods of testing as specified in the Contract Documents.

B.2 Unless otherwise specified, AASHTO methods of sampling and testing shall be adopted where available. In the case of absence of an appropriate AASHTO specification, the ASTM or BS specification shall govern.

1.05.9 UNACCEPTABLE MATERIALS

A. Al l materials not conforming to the requirements of the Specifications at the time they are used will be rejected and shall be removed immediately from the Site unless otherwise instructed by the Engineer.

B. No rejected material, the defects of which have been corrected, shall be used until approval has been given.


Page 26 of 244

SECTION 1.06 CONTRACTOR'S PLANT AND EQUIPMENT

1.06.1 GENERAL

A. Plant and equipment used on the Works shall be of sufficient size and in such mechanical condition as to meet the requirements of the Specifications and shall be available for use when required by the Engineer. The Engineer may order removal and replacement of unsatisfactory plant or equipment.

B. Wherever plant or equipment of a particular size or type is specified, the Contractor may request permission to use an alternative type in place of that specified. In such cases, the Contractor shall furnish evidence to the Engineer, before approval is given, that the production of the plant or equipment proposed is at least equal to that of the specified type.

1.06.2 CONTRACTOR'S SCHEDULE OF PLANT AND EQUIPMENT

A. The Contractor shall submit together with his Tender, a detailed schedule of the numbers and types of plant and equipment which he proposes to utilize on Site to carry out the Works. The schedule shall contain full details for each item, including type, manufacturer, model, identification number, year of manufacture, number of years in use, and, for all new and previously used items, the manufacturer's brochures, catalogues and specifications.

1.06.3 PROVISION AND USE OF PLANT AND EQUIPMENT

A. The Contractor shall furnish all plant and equipment listed in his Schedule and necessary for construction of each phase of the Works. Such plant and equipment shall be delivered to the Site, inspected, and approved by the Engineer prior to commencement of the particular phase of the Works for which it is intended. Any plant or equipment, or part thereof, which becomes excessively worn or defective shall be promptly repaired or replaced, as required by the Engineer.

B. The Contractor shall not remove from the Site any approved plant or equipment without the permission of the Engineer.


Page 27 of 244

SECTION 1.07 MEASUREMENT PROCEDURES

1.07.1 GENERAL

A. Al l Works shall be measured net and in accordance with of the General Conditions of Contract. Al l units of measurement shall be in the Metric System, unless specified otherwise.

B. The method of measurement and computations to be used in determining quantities of materials furnished and of Works performed shall be as defined in the Method of Measurement.

C. All field measurements of quantities for monthly certificates and for final payment shall be made by the Contractor in the presence of the Engineer. Original copies of the field measurement notes, signed by the Contractor, will be retained by the Engineer.

D. I f the Contractor fails to measure any Pay Items, the Engineer may, at his discretion, estimate quantities of such items for the monthly Payment Certificate or recommend that no payment be made for the Items not measured and quantities not computed until i t is measured.

1.07.2 MANUFACTURED ITEMS

A. Whenever standard manufactured items are specified, such as fence wire, plates, rolled shapes, pipe conduit, etc. and these items are identified by gauge, unit weight, section dimensions, etc., such identifications shall be deemed to be nominal weights or dimensions. Unless controlled by tolerances in cited specifications, manufacturing tolerances established by the industries involved may be accepted by the Engineer at the recommendation of the Concerned Authorities.

1.07.3 FITTINGS AND ACCESSORIES

A. When any Items are shown on the Drawings or specified as requiring miscellaneous fittings and accessories for which no separate measurement is provided, the Pay Item will be deemed to include for all such fittings and accessories.


Page 28 of 244

1.07.4 WEIGHT MEASUREMENTS

A. Al l materials which are to be measured or proportioned by weight shall be weighed on accurate and approved scales by competent and qualified personnel, at locations designated or approved by the Engineer.

1.07.5 LINEAR AND AREA MEASUREMENTS

A. Al l items which are to be measured by linear meter shall be measured parallel to the base or foundation upon which such items are placed, unless otherwise shown on the Drawings.

B. Unless otherwise specified, longitudinal measurements for area computations shall be made horizontally and no deductions shall be made for fixtures with an area less than one sq.m. Transverse measurements for area computations shall be the neat dimensions shown on the Drawings or as ordered by the Engineer.

C. No measurements shall be made of rolled down or sloping edges of bituminous courses.

1.07.6 VOLUME MEASUREMENTS IN VEHICLES

A. Materials to be measured by volume in the hauling vehicle shall be hauled in approved type vehicles and measured therein at the point of delivery. Vehicles for this purpose may be of any size or type approved by the Engineer, provided that the body is of such shape that the actual contents may be readily and accurately determined. Al l vehicles shall be loaded to their level capacity and the Engineer may require loads to be releveled when the vehicles arrive at the point of delivery.

B. When requested by the Contractor and i f approved by the Engineer, material specified to be measured by the cu. m. may be weighed and such weights will be converted to cu. m. for payment purposes. Factors for conversion from weight measurement to volume measurement will be determined by mutual agreement between the Engineer and the Contractor, i f no agreement is obtained, the factors will be determined by the Engineer and shall be accepted by the Contractor.


Page 29 of 244

1.07.7 EARTHWORK VOLUME MEASUREMENTS

A. The quantities of excavation paid for under the Contract unit prices shall be limited to the lines shown on the Drawings and on approved cross sections. Excavation beyond lines shown on approved cross sections shall not be paid for unless approved by the Engineer. Excavation in excess of approved cross sections wi l l be measured for payment only in the case of unstable or unsuitable materials ordered by the Engineer to be removed.

B. The Engineer wil l adjust the angle of slopes for cuts and fills as the Works proceed and make determinations of the appropriate slope angles following his evaluation of soil conditions in case there is a change in the type of the soil. The actual slopes of the cuts as constructed shall be measured and recorded by the Contractor. The Engineer will check these records and, i f satisfactory, wil l approve the measurements as a basis for payment.

C. Within 60 days of the date of field survey, the Contractor shall submit to the Engineer for his approval, plots of the original and final earthwork cross sections together with the area and volumetric earthwork computations. The Contractor's cross sections shall be on transparent cross section sheets for print reproductions. Al l sheets shall have a title block and be of the size designated by the Engineer. On final approval of the Contractor's cross sections, the Contractor shall submit the original transparencies and 3 prints of each such transparency.

D. In case of any variations from the approved Drawings, the Contractor shall submit the original and 2 copies of the plotted cross sections and profiles and the notes and computations of his survey. The Contractor shall take cross sections at maximum 25 m intervals along the centerline and at other locations i f directed by the Engineer. Upon mutual agreement between the Engineer and the Contractor, the Contractor may submit cross sections intermediate to these locations. The Engineer wil l indicate, on one copy, his approval of the proposed lines of the Works or his revisions thereto and return such copy to the Contractor. The Contractor shall resubmit for approval any cross sections the Engineer may have revised.

E. The Contractor may, as an alternate method of earthwork computation, request approval to use an electronic computer. Such request shall include details of the computer hardware, the earthwork software programs, the input and output, and a complete summary of the methods and procedures to be used. The Contractor may use an electronic computer for computations, only i f approved, and continuance of such approval is contingent upon satisfactory results being achieved. I f results are not as represented or are otherwise deemed unsatisfactory, the Contractor shall recompute the earthwork quantities by the cross section method.


Page 30 of 244

SECTION 1.08 TEMPORARY FACILITIES

1.08.1 GENERALLY

A. LOCATIONS: The Engineer's approval is to be obtained for the intended locations sitting of all spoil heaps, Temporary Works and services.

B. STANDARDS AND DETAILS: Temporary Works are to be constructed to recognised standards and codes of practice so that they are fit for their purpose. Drawings and details of proposed Temporary Works are to be provided by the Contractor i f requested by the Engineer.

C. TEMPORARY WORKS and services are to be maintained, altered and adapted and as necessary and cleared away on completion or when no longer required. Work disturbed is to be made good.

D. GENERAL: The Contractor shall provide all Temporary Works and services and Contractor's Equipment and tools required for the efficient and safe execution of the Works, including but not limited to:

Temporary roads, hard standings, sleeper tracks and the like.

Temporary fences, gates and barriers.

Temporary offices, stores, messrooms, latrines and compounds.

Scaffold, ladders, hoists, cranes and the like.

Temporary screens, chutes, coverings, roofs and rainwater pipes for protection of the Works and personnel.

Transport and vehicles on and off Site.

Fixed and movable mechanical plant and equipment.

Small tools.

Temporary water and power supplies and site lighting.

Temporary drainage.


Page 31 of 244

1.08.2 TEMPORARY SITE FACILITIES

A. ROADS: Permanent roads, hard standings and footpaths on the Site may be used provided they are adequately maintained and thoroughly cleaned and made good after use and left in unimpaired condition.

B. DIVERSIONS: The Contractor shall in accordance with the specification of the Ministry of Communication and with liaison with the Traffic Department:

Provide temporary detour roads, temporary bridges and culverts, and other facilities to divert traffic through or around any part of the Works or for maintenance of traffic in locations affected by his works that warrant such Temporary Works. Location, standard, width, construction and maintenance of detour routes shall be in accordance with Section 3.06 of the Specification, approved by the Engineer, ensuring at all times that the routes, are signed, striped, maintained and furnished with all traffic control devices as shown, directed and/or needed.

Submit designs and detailed working Drawings of the proposed Temporary Works for approval by the Engineer prior to commencement of the works. The design live load for temporary bridges related to roads exposed to heavy vehicles shall not be less than the design live load for permanent bridges, or as directed by the Engineer.

Where measurements are required for continuously regulating and supervising traffic, provide temporary roads and bridges for one-way traffic with a minimum width of 3.5m. In all other cases the minimum width shall be 7m.

Phase the execution of temporary and Permanent Works to minimise the disruption to traffic.

Submit a phased programme of Temporary Works one month before commencement of any part of the works.

C. TRAFFIC DIVERSIONS: The Contractor shall provide temporary diversions, detour roads, temporary bridges, culverts and similar facilities, whenever it is necessary to safely divert traffic through or around any part of the Works. As per concerned authorities requirements for locations design widths, construction and maintenance of diversion and detour routes, including the provision of signs, pavement markings, lighting, traffic control and the like are to be submitted to and approved by the Engineer prior to execution on Site.


Page 32 of 244

E. FRENCH CROSSINGS are to be provided for free and safe passage of vehicles and pedestrians over pipe and other trenches.

F. TEMPORARY SITE FENCE: The Contractor shall provide suitable and secure temporary site fencing and gates where necessary or as directed by the Engineer. Design of the fencing and gates, including location, construction details, etc. is to be submitted to the Engineer for approval prior to fabrication and erection.

G. NAMEBOARD: The Contractor shall provide reflecting boards (150 x 150) cm at the start and end point of the excavations. Those boards should include the project name, project no., ministry name, Contractor name, and his local address and phone No. in addition to the supervision Consultants. Boards specifications and locations should be approved by the Client and the Engineer.

General nameboards for the whole project should be fixed at the specified locations by the Engineer and in each district of the project area. Those boards should include the project name, Client name, Contractor name, Contact nos, Consultant name and phone no. for the supervision staff office. Boards will be of 4 separated slices each of (240 x 240) cm with spaces of 20 cm between slices that are made of 3 mm thick aluminum and provided with back grooves for fixing on the columns, so no holes should appear at the face side of the board. Face slide should be covered with reflective blue layer and text in reflective white color.

Boards shall be fixed on two columns of hot galvanized (16 or 18) cm I beams and the clear space from the ground to the bottom of the slices shall be 2.0 m and the columns should be provided with movable hinge according to the MOT specifications and fixed to the ground by concrete blocks as per the site conditions. Al l these details should be approved by the Engineer prior to installation of boards.

1.08.3 CONTRACTOR'S TEMPORARY BUILDINGS

Complete according to Project - Project Specifications. To be completed by the design consultant and the water authority.

1.08.4 TEMPORARY SERVICES

A. WATER: The Contractor shall provide clean, fresh water for the Works and make temporary arrangements for storing and distributing about the Site.


Page 33 of 244

B. ELECTRICITY: The Contractor shall provide electric supply and all equipment for lighting and power for the Works and make temporary arrangements for distributing about the Site.

C. POWER: The Contractor shall provide electric power for the Works, including supplies for commissioning engineering services and Plant, at the required voltages.

D. LIGHTING: The Contractor shall provide lighting for the Site and the Works for safety and security of the Works and to facilitate proper execution of work and to illuminate internal surfaces during finishing work and inspection. Spaces designed to be artificially l i t during daylight hours are to have temporary illumination similar to that provided by the permanent installation.

E. PERMANENT ELECTRIC SUPPLY AND LIGHTING INSTALLATION may be used for testing and commissioning and to illuminate the Works, subject to the following conditions:

The Employer does not guarantee that it wi l l be available.

The Contractor must take responsibility for the operation, maintenance and supervision of the system, indemnify the Employer against all damage and pay all costs and renew all used tubes and lamps.

The Contractor must indemnify the Employer against reduction in manufacturer's guarantee periods for equipment etc. due to its use before completion of the Works.

F. TELEPHONES: The Contractor shall provide joint temporary telephone facilities for his own and Subcontractors' use and for the use of those acting on behalf of the Engineer and shall pay the cost of all calls except international calls made by those acting on behalf of the Engineer.

1.08.6 DIVERSION OF PUBLIC UTILITY SERVICES

A. TEMPORARY DIVERSION OF EXISTING PUBLIC UTILITY SERVICES: Where execution of the Works involves the temporary diversion of existing public utility services, the Contractor shall perform such temporary diversion and shall maintain the flow or service as directed by the Engineer. Unless otherwise stated, the costs of any such diversions are deemed to be included in the Contract Price.


Page 34 of 244

B. PERMANENT DIVERSION OF EXISTING PUBLIC UTILITY SERVICES: Where the Works require the permanent diversion of existing public utility services, either as shown on the Drawings or directed by the Engineer, the diversion shall be carried out by the Contractor and shall be paid for at the prices stated for such work in the Bi l l of Quantities.


Page 35 of 244

SECTION 1.09 SAFETY PRECAUTION MEASURES

1.09.1 GENERAL

A. Contractor shall take all necessary measures for public safety for all project components according to the requirements of municipalities and other concerned authorities.

PART 36: Excavation and Backfilling Technical Specification For Sewer Network

Page 36 of 244

PART 2: EXCAVATION AND BACKFILLING

SECTION 2.01 SCOPE

A. The Work Covered in this Division Comprises: Clearing of the site, and excavation and backfilling for roads, structures and trenches and protection work related to gabions, riprap, stone pitching and geotextiles.


Page 37 of 244

SECTION 2.02 SITE CLEARING

2.02.1 CLEARING AND GRUBBING

A. The Contractor shall remove and dispose of all vegetation, surface debris, stones and rocks from areas where the Works are to be performed.

B. When shown on drawings or directed by the Engineer, the Contractor shall remove and dispose of pavement layers including asphalt and granular layer to the surface of the subgrade. Moreover the ground surface under all structures shall be cleared of all existing concrete foundations (if any) and stumps.

C. Trees shall be removed carefully, stored and / or relocated as specified or as instructed by the concerned Authorities and the Engineer.

2.02.2 REMOVAL OR REALIGNMENT OF OBSTRUCTION AND UTILITIES

A. The Contractor shall remove wholly or in part and dispose of all obstructions, buildings, fences, abandoned pipelines and others, as indicated on drawings or as directed by the Engineer.

B. Where indicated on the Drawings, utilities are to be realigned or salvaged as directed by the Engineer.


Page 38 of 244

SECTION 2.03 EXCAVATION

2.03.1 GENERAL

A. Earth: naturally occurring, man made or placed material that can be removed manually or by mechanical shovel, bulldozer or other mechanical equipment.

B. Rock/Hard Materials: naturally occurring, man made or placed material of more than one cubic meter that cannot be destroyed or removed by methods used for removal of earth described in Clause A but requires the use of pneumatic tools, impact breakers or, i f allowed, explosives for its removal.

C. Materials and conditions: the Contractor shall assess the nature of the work and the materials to be excavated, and shall take sole responsibility for his assessment of materials and conditions.

D. Ground-water level is to be established at the time the various excavations are carried out.

2.03.2 TOP SOIL

A. Topsoil: before beginning general excavations or filling, the Contractor shall excavate topsoil from required areas and keep separate from excavated subsoil.

B. The Contractor shall stockpile excavated topsoil required to carry out subsequent top-soiling operations in temporary spoil heaps on the Site as instructed.

C. Surplus Topsoil: The Contractor shall remove from the Site to a tip provided by the Contractor

2.03.3 EXCAVATING

A. General

A.1 All excavation shall be performed to the line, grades, cross section and sizes shown on the drawings, or/and directed by the Engineer.


Page 39 of 244

A.2 Methods: The Contractor shall submit with the Tender details of proposed methods of working which may cause nuisance, damage or danger to people and/or property.

A.3 Materials arising from excavati