Central Ground Water Board Tender

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

100 mm (4”) Nominal Bore

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

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

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

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

Development by air compressor

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 Piezometer well welded with minimum 5 Nos of anchoring plate as per drawing

Supply and installation of protection box made of 3mm GI Sheet of size 550mm x450mmx530mm along with bruss lock (7 lever hardened ) and 3 keys for each lock as per drawing. CGWB PZ should be carved with welding on outer surface of casing pipe. Salient features of the wells to be legibilly painted/printed on the protection box

Preparation and submission of basic data report per site in triplicate along with data sheets, analysis sheet, chemical analysis report. Ground Water sample will be collected by the Vendor from each site for which sample bottles/acids will be supplied by CGWB, NER. After sample collection, sample bottles need to be submitted to the CGWB, NER, Chemical Lab for analysis. Chemical findings will be shared with the Vendor by CGWB, NER for due incorporation in the BDR. Site location map and approachability with landmarks, photograohs and video and 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 for each site etc. The soft copy as well as hard copy should be submitted. Summery of Piezometer details in xls format (as per proforma given by CGWB) including detatails of dia and depth of assembly pipes, screen pipe, static water level, gravel packing depth and thickness, Litholog etc. should be also submitted.