Central Ground Water Board Tender

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Central Ground Water Board - CGWB Tender

Works
Civil And Construction
Excavation
Eprocure
Opening Date5 May 2023
Closing Date25 May 2023
Tender Amount₹ 33,61,06,500 
Notes
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Costs

Description

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Documents
TENDER FOR CONSTRUCTION OF 199 NOSEXPLORATORYAND 72 NOSOBSERVATION WELLS IN ASSAM, BIHAR, ODISHA AND WEST BENGAL STATE
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BOQ Items

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Enlargement of hole by reaming to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness

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Using 444.5 mm (17-1/2”) RR Bit for 200 mm (8”) assembly pipe

560

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

4320

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Using 311.15 mm ( 12-1/4”) RR Bit for 100 mm (4”) assembly pipe

4880

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Supply and installation of ERW casing pipe conforming to Table 3 of latest version of IS: 4270-2001

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200 mm (8”) Nominal Bore

480

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150 mm (6”) Nominal Bore

3744

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100 mm (4”) Nominal Bore

4512

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Supply and installation of LCG V- wire screen conforming to latest version of IS: 8110-2000

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150 mm (6”) Nominal Size Slot opening 1.0 mm

576

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100 mm (4”) Nominal Size Slot opening 1.0 mm

288

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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

768

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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 one water samples from observation well adopting standard procedure in 1 litre HDPE bottle, along with video recordings of compressor hour meter, discharge etc.

320

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Developement unit till water become sand/slit free and Pumping test ( minimum 20 hours) , SDT, APT and collection of 6 water samples in teflone coated/HDPE Bottle per site) and submission of data in prescribed porforma and analysis report

16

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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 in NABL accredited labs (collection of 6 water samples in teflone coated/HDPE Bottle per site)

96

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chemical analysis of water samples for Heavy metals Zn, Mn,Pb,Fe, Cr,Cu,Se,Ni & U As in NABL accredited labs (collection of 6 water samples in teflone coated/HDPE Bottle per site)

96

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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 with minimum 6 Nos of anchoring plate as per drawing

32

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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 EW” for exploratory wells and “ CGWB OW” for observation wells should be carved with welding on outer surface of casing pipe 0.5m.

32

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Supply and installation of protection box made of 3.00 mm GI sheet of Size: 550mm X450mm X530mm along with Brass lock (7 lever hardened) and three keys for each lock as per drawing

32

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Supply and installation of Display Board as per drawing

32

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Preparation and submission of basic data report along with analysis sheet, graph sheet, datas etc

16

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