Details: drilling of pilot hole not more than 216 mm (8 1/2'') size of rock roller/ drag/ button bit including sample collection at every 3m interval, preparation and submission of litholog,measurement of discharge through v-notch at various stages of drilling, collection of water sample in 1 litre good quality hdpe bottle electrical logging using 406 mm and 1626 mm (16" and 64") sp resistivity probe and natural gamma logging. submission of report including zone wise water quality and preparation of composite log and tentative well assembly reaming of pilot hole not less than 375 mm (14 3/4'') size of suitable bit to accommodate 200 mm (8") well assembly. supply and installation of erw casing pipe conforming to table 3 of latest version of is: 4270-2001 of diameter and thickness given below ew_200 mm (8”) dia nominal bore, thickness 5.4mm 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: 8110-20
Sector: Ground Water Dept