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Construction Method PURAC-ECONET Joint venture Bidder Contents Chapter - PREAMBLE I Scope of the Project II Advantages and Disadvantages of the project Chapter - GENERAL REQUIREMENTS I Standards and codes applicable during the construction II Site office .2 III Laboratory IV Temporary Works V Equipment to be furnished by the Contractor to the Engineer VI Construction logbook VII Equipment, machines and manpower from the Contractor VII Equipment, machines and manpower from the Contractor VIII Construction Organization Design IX Supply and maintenance of materials, equipment X Works to be done in the nighttime XI Safety of traffic XII Protection of underground utilities and services XIII Safety for electric power wires and poles along the construction routes XIV Water drainage system to be provided in the working area XV Access roads to factories, plants and residents’ areas XVI The additional works or variations XVII Existing projects of the Employer XVIII Commencement Notice XIX Health control XX Joint meetings XXI Construction inspection and management from the upper levels XXII Documentation on the quality and quantities of works: XXIII Inspection Document and Report to the Engineer: XXIV Checking and inspection: Contract No.CB-02: Design-Build for Cao Bang wastewater treatment system project Construction Method PURAC-ECONET Joint venture Bidder XXV Completion drawings (as-built drawings) XXVI Remedy work for defects during Liquidated damages Period XXVII Treatment of breaches Chapter - SURVEYING WORK Chapter -CONSTRUCTION METHOD Chapter 5- CARE OF WATER Chapter - EARTHWORKS – REINSTATEMENT OF ROADS I Scope of work II Trench excavation for pipe laying and fitting III Soil improvement IV Material for bedding VI Reinstatement to the original status VII Remedial work to the damages Chapter7 - CONCRETE WORK - FORMWORK - REINFORCEMENT I General requirements II Requirements on the materials to be used for concrete III Requirements on the execution IV Quality Control Chapter - INSTALLATION OF PIPING, FITTING AND EQUIPMENT I General requirement II Receiving, storing pipes, materials and fittings III Installation Chapter - LABOUR SAFETY, FIRE PROTECTION AND FIGHTING, ENVIRONMENTAL HYGIENE, TRAFFIC SAFETY AND FLOODING PREVENTION METHODS A Labour safety B Environmental hygiene C Fire protection and fighting method D Site security E Plans of Environmental protection, Labour Safety, Safety in waterway and highway and flooding prevention Contract No.CB-02: Design-Build for Cao Bang wastewater treatment system project Construction Method PURAC-ECONET Joint venture Bidder Chapter 10 - QUALITY CONTROL METHOD I Introduction II Bases for quality control of the project III.Detailed quality control measures Chapter 11 - CONCLUSION Contract No.CB-02: Design-Build for Cao Bang wastewater treatment system project Construction Method PURAC-ECONET Joint venture Bidder Chapter - PREAMBLE I – Scope of the Project Location of the WWTP-Site Cao Bang city is the socio-economic, cultural and political center of Cao Bang province with total natural area is about 5.500 The town has wards: Song Bang, Song Hien, Tan Giang, Hop Giang and communes: De Tham, Ngoc Xuan, Hoa Chung and Duyet Trung with total population is around 51.000 people (by mid 2013) Cao Bang city is located on the center of Hoa An district in Cao Bang province under morthest mountain area, at coordinates 22°39’ to 22°42’ 'north latitude and 106°11’ to 106°18’ 'east longitude Compared to administrative border line of the province, the town is located in the East of the province, 286 km of Ha Noi along national highway No.3, 120km of Lang Son town along National Highway 4A The town has roads going through and connecting Ha Noi – Thai Nguyen – Bac Kan – Cao Bang – China This is the most important road axis of the whole Northern - East area Furthermore, the provincial road 203 to Hoa An – Pac Bo town also contributes significantly to the development of the town Cao Bang city is located on the tropical monsoon with some special characteristics of this climate area In the summer it could be cool and in winter mostly it is colder than other provinces in North Delta provinces The average temperature was about 21 ºC over the whole year with the minimum average temperature in the winter during being about 8ºC and the maximum temperature in the summer about 32ºC The coldest month during this period was December-January and the hottest months are June to August The climate is devided into two seasons, dry- and rain seasons Rain season normally starts from April to October with main focus on July, August and September, and the dry season begins late October-November up to April of the next year Cao Bang city is not really effected by heavy wind or storm but sometimes there are suddenly tornadoes with high wind speeds of 40 m/s in a short time The main wind direction is south, east-south with average speed annually measured of 1.4 m/s and with maximum speed at heavy storm of 40 m/s, as indicated With the role as a key traffic joint, a socio – economic center of the province, Cao Bang city has been invested for economic development, infrastructure, and environmental landscape in order to promote characteristics and function of a province The Contractor shall note the proximity of the WWTP site to existing residential areas Project’s objectives: The Contractor is required to deliver to the Employer a fully functional, tested and operating of Sewage system for Cao Bang City, including WWTP and its outfall Based on information given in the Tender Documents, the Contractor shall: Detail design and construct a WWTP based on the basic design given in the Tender Documents, in accordance with the Employer’s Requirements, Construction Method PURAC-ECONET Joint venture Bidder and Construction of Sewage Collection Network and wastewater pumping stations in accordance with the detailed design provided in the Drawings and Employer's Requirements Which shall include all necessary activities (such as construction, supply and installation of equipment, supply of spare parts, testing, operation, handover, training, etc.) pertaining to the successful completion of the Contract as detailed in this Bidding Documents Site Data Geotechnical Conditions The Employer and consultant have carried out soil investigations Soil investigation reports are available for Tenderer for copying The Tenderer shall take all such additional steps he considers necessary to familiarise himself with Site conditions Soil investigation data is furnished for information only and it shall be expressly understood that the Employer will not be held responsible for any interpretations or conclusions drawn there from by the Contractor, nor the completeness of the data The Tenderer should note that ground water levels on the site might be high Population and Project Area The Consultant has studied the project within a large area of which are inner wards of the town/city and De Tham commune Table 1: Population and project area Project area Population 2007 2015 Area 2025 Hop Giang ward Song Bang 11,939 14,044 17,214 93 ward Song Hien 7,486 8,805 10,222 228 ward Tan Giang 9,705 11,415 13,908 237 ward De Tham 8,856 10,418 12,690 359 commune 7,725 9,087 11.066 820 Total 45,712 53,769 65,100 1,737 Boundary of service area: The East and the North border with Bang River The South borders with highway, which was specified in master plan The West borders with Hoang Tung commune, Hoa An district Location of WWTP Construction Method PURAC-ECONET Joint venture Bidder Location of the wastewater treatment plant is selected at the field area, near national highway No.4 This position ensure requirement of wind direction and far from residential area - Land occupation area: Household Connections Constructions of 3000 connection points are required from the households to the outside network II - Advantages and Disadvantages of the project Advantages - Working area has many small paths, therefore, the Contractor can arrange the construction of many sections at the same time So the Contractor can control the construction progress - Working in the nighttime, the Contractor can use the public lighting system Disadvantages - The execution of the project is carried out in the urban, so it is affected by the traffic Traffic safety is paid attention to during the construction - Working area passes through many existing public utilities such as cabling, telephone cable, existing water supply pipeline, drainage, and local residents’ domestic water pipelines along the route - Working site is spacious, therefore it is difficult to make arrangement and protect the yard, the workshop and properties on site - The execution of the project will influence the lives of the local residents and environmental hygiene during the project Construction Method PURAC-ECONET Joint venture Bidder Chapter - GENERAL REQUIREMENTS 1– Standards and codes applicable during the construction AISC S326 Specifications for the Design, Fabrication and Erection of Structural Steel for Buildings (referred to herein as AISC specification) ANSI A14.3 Ladders-Fixed-Safety Requirements ASTM A36 Standard Specification for Structural Steel ASTM A48 Standard Specification for Gray Iron Castings ASTM A53 Standard Specification for Pipe, Steel, Black and HotDipped, Zinc-Coated Welded and Seamless ASTM A108 Standard Specification for Steel Bars, Carbon, ColdFinished, Standard Quality ASTM A123 Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products ASTM A496 Standard Specification for Steel Wire, Deformed, for Concrete Reinforcement ASTM A500 Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes 10 ASTM A525 Standard Specification for General Requirements for Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process 11 ASTM A536 Standard Specification for Ductile Iron Castings 12 ASTM A563 Standard Specification for Carbon and Alloy Steel Nuts 13 ASTM A582 Standard Specification for Free-Machining Stainless and Heat-Resisting Steel Bars, Hot-Rolled or ColdFinished 14 ASTM A666 Standard Specification for Austenitic Stainless Steel, Sheet, Strip, Plate, and Flat Bar 15 ASTM A668 Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial use 16 ASTM A780 Standard Practice for Repair of Damaged Hot-Dipped Galvanized Coatings 17 ASTM A786 Standard Specification for Rolled Steel Floor Plate 18 ASTM B26 Standard Specification for Aluminium-Alloy Sand Castings 19 ASTM B36 Standard Specification for Brass Plate, Sheet, Strip, and Rolled Bar 20 ASTM B221 Standard Specification for Aluminium and AluminiumAlloy Extruded Bars, Rods, Wire, Shapes, and Tubes 21 ASTM B308 Standard Specification for Aluminium-Alloy 6061-T6 Standard Structural Shapes 22 ASTM B632 Standard Specification for Aluminium-Alloy Rolled Tread Plate ] Construction Method 23 ASTM F467 24 ASTM F468 25 ASTM F593 PURAC-ECONET Joint venture Bidder Standard Specification for Non-Ferrous Nuts for General use Standard Specification for Non-Ferrous Bolts, Hex Cap Screws, and Studs for General Use Standard Specification for Stainless Steel Bolts, Hex Cap Screws, and Studs Aluminium Association (AA): 30-86, Specifications for Aluminium Structures Standard Specifications for Highway Bridges Standards on Wires and Cables 26 BS 6004 IEC 227 PVC insulated cables (non-armoured) for Electrical Power 27 BS 6346 PVC insulated cables for Electrical Supply 28 BS 6749 PVC Insulation and Sheaths 29 BS 5467 IEC 502 Armoured Cables with XLPE and HEPR thermosetting Insulation, 600/1000V and 1900/3000V 30 BS 6622 IEC 502 Extruded cross-linked polyethylene 3800/6000V up to 19000/30000V 31 BS 6500 IEC 227 Insulated Flexible Cords 32 BS 6207 IEC 245 Part - Mineral Insulated Cables 33 BS 6360 Copper Conductors for Cables 34 BS 6234 Polythene Insulation and Sheath for Cables 35 BS 2897 Aluminium Strip Armour for Cables 36 BS 1442 Galvanized Mild Steel Wire for Armouring Cables 37 BS 5308 Instrumentation Cables 38 BS 4121 Mechanical Cable Glands 39 BS 4579 Performance of Mechanical and Compression Joints for Cables 40 BS 6081 Termination of MICC Cables 41 BS 6121 Mechanical Cable Glands for Elastomer and Plastic Insulated Cables 42 ISO 11801 Principle Design Standard for Structured Cabling Systems Vietnamese Standards: 43 TCVN 5747-1993 44 TCVN 4314-1986 45 TCVN 1770-1986 46 TCVN 1771-1986 ] Insulation, Soil for construction - Classification Mortar for construction – Technical requirements Sand for construction – Technical requirements Macadam for construction – Execution and inspection Construction Method PURAC-ECONET Joint venture Bidder 47 TCVN 2682-1992 48 TCVN 4560-87 Portland Cement - Technical requirements Water for concrete and mortar – Technical requirements 49 TCVN 4085-1985 Bricks– Execution and Inpection 50 TCVN 4453-1985 Concrete structrure and erection– Execution and inspection 51 TCVN 4447-1987 Earthwork - Execution and inspection 52 20 TCN 211 – 93 Design of roads, streets and plaza and urbans 53 22TCN 211 – 93 Design procedure of Flexible pavement promulgated by Ministry of Transport 54 22TCN 11-77 Pavement with red gravel mixture 55 22TCN 252-98 Execution of macadam pavement 56 22TCN 249-98 Execution of hot mixed asphalt concrete pavement 57 TCVN 4516-88 Finishing the construction plan– Execution and inspection 58 20TCN 71-77 Welding work to reinforcement steel and embeded items in RC structrures 59 20TCN 170-89 Steel structure– Fabrication, erection and inspection Technical requirements 60 TCVN 5638-1991 Quality assessment of the construction and erection works– Basic principles 61 Decision Ref 166/CÑG issued by Ministry of Transport regarding inspection of bridges and culverts Projects 62 For dutctile iron pipes with the diameters equivalent to the standard ISO – 2531.K9, test pressure of 50kg/cm2 63 Valves in accordance with ISO 9001 or equivalent, for valves with diameters less than DN 400, gate valves to be used comply with B.S 5163 64 22TCN –33.85 Design of external water supply pipepline made by Ministry of Construction 65 Technical Regulations on Labour Safety in the construction work TCVN – 5308-91 in accordance with Decision 156/BXD/KHKT dated 31st December 1990 Site office ] - All site activities and construction equipment and machines for the construction of the pipeline will be arranged on the permitted areas along the pipeline routto from the water treatment plant to the end of the project - The Contractor is responsible for safe preservation of facilities and structures such as roads, entrance gate, transmision lines, trenches, walls, box culverts, bridges, poles, supports, signs, fence, bench marks, statue and so in the areas adjacent to the project site - The Contractor himself will find the reasonable location to build his site office, storage yard and warehouse Construction Method PURAC-ECONET Joint venture Bidder - The Contractor will build the site office equipped with necessary furniture and equipment such telephone, fax machine, computer (Pentium III), printer, Internet line - The site office will be arranged with two working rooms and one meeting of 15 to 20 persons with sufficient chairs, desks and tables Laboratory The testing equipment, tools are provided on site by the Contractor, such as: + Surveying equipment: theodolite, leveler, steel measurer + Standard sieves + Moulds for sampling + Other testing equipment for slump test, moisture checking, plastic index, soil yield strength, etc + The other equipment is as mentioned in the design documents The other equipment and tools for testing are arranged in the center laboratory may be rent or available from any joint venture (the documentations are given to the Consultant and the Employer as an evident) Temporary Works Some facilitates and equipment to be used for construction such as diversion road, temporary road, and temporary facilitates, workshop, storage yards, etc are carried out before commencement of the permanent works in the contract The Contractor can only carry out these works when the design documents for construction organization prepared by the Contractor is approved by the Engineer Progress Meetings and Reportings A regular meeting between Engineer and the Contractor’s Representative shall be held once a week at a time agreed upon by both parties to discuss the progress being made, the work proposed for the forthcoming week and any problem having a direct bearing on the immediate or near term work activities Weekly reports shall be furnished by the Contractor and submitted to Engineer and Employer day prior weekly meeting dated is arranged Monthly, half year and yearly reports shall be furnished by the Contractor and submitted to Engineer and Employer a week prior meeting dated is arranged Site Records Daily records of on-site testing and inspection shall be kept on forms of approved format Test results shall be certified by the responsible member of the Contractors staff All test certificates and inspection records (including any from suppliers or other outside testing agencies) shall be clearly identified with the appropriate part of the Works to which they refer, and they shall be submitted to the Engineer together with the respective Passing Certificate ]