Central Ground Water Board Tender

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Central Ground Water Board - CGWB Tender

Works
Civil And Construction
Water Storage And Supply
Eprocure
Opening Date17 Oct 2023
Closing Date9 Nov 2023
Tender Amount₹ 66,84,70,500 
Notes
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Description

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Documents
Tender FOR CONSTRUCTION OF PIEZOMETERS 810 NOS IN SOFT ROCK/ HARD ROCK AND SUPPLY, INSTALLATION, COMMISSIONING OF DWLRS AND TELEMETRY, ESTABLISHMENT OF DATA ACQUISITION SYSTEM and ITS MAINTENANCE FOR REAL TIME GROUND WATER LEVEL MONITORING
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BOQ Items

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Using 381 mm ( 15”) RR Bit for 150 mm (6”) assembly pipe

6762

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Supply and installation of ERW casing pipe conforming to latest version of IS: 4270-2001 of diameter and thickness given below

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150 mm (6”) Nominal Bo,re thickness 5.4mm

5348

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Supply and installation of LCG V- wire screen conforming to latest version of IS: 8110-2000 of dimensions 150 mm (6”) Nominal Size thicnkness 7mm with slot opening size given below

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Slot opening 1.5 mm

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Slot opening 1.0 mm

1242

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Slot opening 0.75 mm

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Supply and shrouding of pea gravel confirming to latest version of IS: 4097-1967

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Particle size range 3.35 mm to 4.75 mm for 1.5 mm slot opening

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Particle size range 2.00 mm to 3.35 mm for 1.0 mm and 0.75 mm slot opening

6900

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Supply and filling up borehole/ annular space between casing pipe and bore hole wall with local clay, if required

69

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Development by Air Compressor of adequate capacity for minimum 10 hours, over pumping and by other means till discharge water is clear and free of sand including collection of two water samples adopting standard procedure in 1 litre HDPE bottle, along with video recordings of compressor hour meter, discharge etc.

69

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chemical analysis of water samples for 15 parameters pH, EC, TH, TDS, Ca, Mg, Na, K, CO3, HCO3, SO4, NO3, Cl, F & Fe in NABL accredited labs

69

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chemical analysis of water samples for Heavy metals Arsenic, Uranium in NABL accredited labs

69

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Construction of cement concrete platform of dimension 0.70 X 0.70 X 0.60 m (0.30 m above ground level) using concrete mix of 1:2:4 around the housing pipe welded withminimum 6 Nos of anchoring plate as per drawing

69

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Supply and fitting of well cap as per drawing with Allen Keys. MS Plate size 5 mm embossed & welded with permanent marking of “ CGWB Pz” on wells should carved with welding on outer surface of casing pipe 0.5mtrs

69

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Supply and installation of protection box along with Brass lock (7 lever hardened) and three keys for each lock as per drawing

69

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Supply and installation of Display board as per drawing

69

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Preparation and submission of basic data report per site in triplicate along with logging graphs, data sheets, analysis sheet,logging graphs ,chemical analysis report from NABL lab, site location map and approachability with land marks, photographs and videos of activities of drilling, assembly lowering, gravel measurement and gravel packing, well development using compressor and well water discharge, well site with display board well cap, protection box activity for each site, etc.The soft copy should be submitted.Summary of Pz details in xls format (as per proforma given by CGWB) including details of assembly pipe, screen pipe, static water level, TDS, gravel packing depth and thickness, Litholog etc should be also submitted.

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