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| 1 | Drilling of pilot hole for Piezometer using bentonite fluid by rock roller/drag bit of 300 mm dia including formation sample collection at every 3m, preparation and submission of litholog. (Drilling Depth can be varied from 60 m to 130 m as per the recommendation received by Site-incharge) |
| 2 | Drilling of overburden by Rockroller/ drag/ button bit to accommodate ERW MS - 150 mm, 5 mm thickness casing pipe including sample collection, praparation and submission of litholog, measurement of discharge through V-notch at various stages (Depths) of drilling, collection of water sample of each fracturezone encounteres adopting standard procedure in 1 ltr good quality HDPE bottle. |
| 3 | Drilling by DTH Method using appropriate size of button bit so as to reach targetted depth with diameter of hole not less than 135 mm at 100 m depth and final hole diameter not less than 125 mm at hole bottom including sample collection and preparation of lithology. |
| 4 | Digital Electrical logging using 406 mm and 1626 mm (16\" and 64\") SP, resistivity probe and Natural gamma logging, submission of log graph & report including zone wise water quality, logging graph, composite log etc. |
| 5 | Supply and installation of ERW MS - casing pipe of 150 mm nominal size dia, thickness 5 mm conforming to Table 3 of latest version of IS: 4270-2001 of diameter and thickness. |
| 6 | Supply and installation of LCGV- wire screen of 150 mm nominal size dia, thickness 6 mm conforming to latest version of IS: 8110-2000 of dimensions. (0.75 mm to 1 mm - Screen Size as per site condition) |
| 7 | Supply and installation of ERW MS - casing pipe of 100 mm nominal size dia, thickness 5 mm conforming to Table 3 of latest version of IS: 4270-2001 of diameter and thickness. |
| 8 | Supply and installation of LCGV- wire screen of 100 mm nominal size dia, thickness 6 mm conforming to latest version of IS: 8110-2000 of dimensions. (0.75 mm to 1 mm - Screen Size as per site condition) |
| 9 | Supply and shrouding of pea gravel of Particle size range 2.00 mm to 3.35 mm for 1.0 mm screen opening confirming to latest version of IS: 4097-1967. |
| 10 | Supply and filling up borehole/ annularspace between casing pipe and bore hole wall with clay balls |
| 11 | Development by air compressor of adequate capacity for minimum 3 hours to clear the discharge water & collection of water samples. |
| 12 | Development by air compressor in 7 Piezometers of adequate capacity for minimum 5 hours and by other means till discharge water is clear and free of sand. |
| 13 | Pumping test (includes pre pumping for 5 hours and 16 hours recuperation, SDT (4 steps,60 min each), APT (960 min) and collection of 2 nos. of water samples (2 Basic using standard procedure per EW in 1 litre HDPE bottle) and submission of report with data, graph sheet, analysis etc. |
| 14 | 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 and submission of report from NABL lab |
| 15 | Construction ofcement concrete platform 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 minimum 6 nos. anchoring plate as per drawing |
| 16 | Supply and installation of protection box made of GI sheet of 3.15mm thickness along with Brass lock (7 lever hardened) and three keys for each lock as per drawing & Well Cap as per drawing. MS Plate size 5 to 10mm with welding on outer surface of casing pipe 0.5mtrs. |
| 17 | Supply and installation of display board as per specification in drawing |
| 18 | Preparation and submission of basic data report in triplicate along with logging graphs, data sheets, analysis sheet, logging graphs, chemical analysis report from NABL lab, photographs/ videos of activity drilling assembly, part assembly lowering, pumping test, pumping test, V- notch discharge at various depths of drilling well site with display board well cap, protection box activity for each EW site, etc. The soft copy should be submitted. |
