Central Ground Water Board Tender

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Central Ground Water Board - CGWB Tender

Works
Civil And Construction
Excavation
Eprocure
Opening Date1 Nov 2023
Closing Date9 Dec 2023
Tender Amount₹ 8,50,94,170 
Notes
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Drilling of Piezometer bottom by DTH method using appropriate sizes of button bits so as to reach targeted depth with diameter of hole not less than 165 mm at 100 m depth and final diameter not less than 152 mm at hole bottom including measurement of discharge through V-notch at various stages (depth) of drilling, collection of water sample for each aquifer formation/fracture zone encountered adopting standard procedure,formation sample collection at every 3 meter intervals preparation and submission of litholog, discharge measurement etc.

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For 80 m Hard Rock Well

8126

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For 150 m Hard Rock Well

9151

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After completion of drilling development ofwell with air compressor till discharge water is clear along with PYT for discharge more than 1 lps (100 minutes) or as decided by CGWB site hydrogeologist, collection of 2 bottles (1 treated with acid) of water sample (1 lit each)for submission to CGWB

170

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Slug Test (Discharge 1 lps or as decided by CGWB site hydrogeologist)

42

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Chemical analysis of water samples for 15 parameters pH, EC, Total Hardness, Ca, Mg, Na,K,CO3, HCO3, SO4, NO3,Cl, F, PO4 & Si in NABL accredited labs and submission from NABL lab

212

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Chemical analysis of water samples for Heavy metals Fe, Mn, Cu, Pb, Cd, Zn, Cr, Co, Ni and As. in NABL accredited labs and submission from NABL lab

212

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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 around the Piezometers well welded with minimum 6 Nos. of anchoring plate as per drawing.

212

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Supply and installation of protection box made of 3 mm GI sheet of Size: 550mm X450mm X530mm along with Brass lock (7 lever hardened) and three keys for each lock as per drawing

212

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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’ should be carved with welding on outer surface of casing pipe AGL 0.5 mtrs

212

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Supply and installation of Display Board as per drawing

212

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"Preparation and submission of basic data report per site for each Pz in triplicate along with logging graphs, data sheets, analysis sheet, chemical analysis from NABL lab, photographs/video of activity drilling assembly lowering V-notch discharge at various depth of drilling, with well discharge, water sample collection, display board, well cap, protection box etc. The soft copy as well as hard copy should be submitted. Summary of Piezometer details in xls format (as per proforma given by CGWB) including details of location (Village, block, district, Latitude, longitude) dia and depth of assembly pipe, static water level, Litholog, water bearing zone, aquifer parameters etc. should be also submitted."

212

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