Central Ground Water Board Tender
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Costs
EMD
₹ 16,19,080Document Cost
₹ 5,000Tender Fee
Refer Documents
Description
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Contact
Tender Id
2024_CGWB_811952_1Bid Award Id
ViewTender No
NIET No. 25/2022-23/MMS-ITender Authority
Central Ground Water Board ViewPurchaser Address
-Website
http://eprocure.gov.in
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Documents
Construction of 135 nos exploratory and 31 nos observation wells in Madhya Pradesh state
BOQ Items
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Supply and installation of ERW casing pipe conforming to Table 3 of latest version of IS: 4270-2001 of diameter and thickness given below
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EW_200 mm (8”) dia Nominal Bore, thickness 5.4mm
1269
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Supply and installation of MS slotted pipes conforming to sizes as per Table 1 with slotting arrangement shown in Figure 2 of latest version of IS: 8110-2000 of dimensions given below"
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EW_200 mm (8") dia Nominal Size, thickness 5.4mm with slot opening size 1.0 mm
324
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Supply and shrouding of pea gravel confirming to latest version of IS: 4097-1967 of size given below
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EW_Particle size range 3.35 mm to 4.75 mm for 1.5 mm slot opening
118.49
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Cement sealing at the depth range 0 to 3m and at the contact of alluvium and hard rock (for 3m) to avoid air losses while drilling the hard rock through DTH drilling and other means of well development. After cement sealing, well should be rest for setting of cement
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Cement sealing at the depth range 3m (from 0-100m) at anywhere as per the isntruction of CGWB site hydrogeologist) if water salinity issue is identified. After cement sealing, well should be rest for setting of cement.
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Development by Air Compressor of adequate capacity, over pumping and by other means till discharge water is clear and free of sand including collection of two water samples from well adopting standard procedure in 1 litre HDPE bottle, along with video recordings of compressor hour meter, discharge etc.
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Drilling by DTH method below soft rock formation using appropriate sizes of button bits so as to reach targetted depth with diameter of hole not less than 175 mm upto 150 m depth and final diameter not less than 165 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, drill time log ,discharge measurement etc.
2010
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Pumping Test incudes prepumping for 8 hours and recuperation for 24 hours , SDT (3 steps), APT for 1000 minutes and 90% or full recovery) and collection of 4Nos water sample adopting standard procedure for basic parameter and heavy metals in 1 litre good quality HDPE bottle.
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Preliminary yield test by lowering submersible pump of appropriate capacity upto the bottom of the well including collection of 3 nos of water samples for basic analysis and 1 sample for heavy metal analysis including arsenic and uranium for 100 min duration.
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Caliper logging, submission of logging graph, report along with video recordings
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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
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Chemical analysis of water samples for Heavy metals _Co, Pb, Ni, Zn,Mn,Cu, Arsenic and Uranium in NABL accredited labs
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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
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Supply and fitting of well cap as per drawing.A MS Plate size 5 to 10mm embossed & welded with permanent marking of “ CGWB EW” for Exploratory Wells & "CGWB OW" for Observation wells should carved with welding on outer surface of casing pipe
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Supply and installation of Display board as per drawing
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Preparation and submission of basic data report in triplicate for EW and OW along with logging graphs, data sheets, analysis sheet,logging graphs ,chemical analysis report from NABL lab, photographs/ video of activity drilling assembly, part assembly lowering, pumping test, well site with display board well cap, protection box activity for each EW site, etc.The soft copy should be submitted.
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