Description: CONSTRUCTION OF PIEZOMETERS 1612 NOS IN SOFT ROCK HARD ROCK AND SUPPLY INSTALLATION COMMISSIONING OF DWLRS AND TELEMETRY ESTABLISHMENT OF DATA ACQUISITION SYSTEM and ITS MAINTENANCE FOR REAL TIME GROUND WATER LEVEL MONITORING Name of Work Construction of 212 142 70 piezometer wells in Chhattisgarh CG PZ BOQ 1 Hard Rock 80 m 142 Nos Hard Rock 150 m 70 Nos
Details: Drilling of Piezometer overburden by rock roller/drag/button bit to accommodate casing pipe (6" &7" diameter), including sample collection , preparation and submission of Litholog in1 litre good quality HDPE bottle. Supply and installation of ERW casing pipe conforming to Table 3 of latest version of IS: 4270-2001 Supply and installation of ERW casing pipe conforming to Table 3 of latest version of IS: 4270-2001 152.4 mm (6") Nominal Bore 152.4 mm (7") Nominal Bore DrillingofPiezometerbottombyDTHmethod using appropriate sizes of button bits so as to reachtargeteddepthwithdiameterofholenot less than 160 mm at 100 m depth and final diameter not less than 152 mm at holebottom including measurement of discharge through V-notch at various stages (depth) of drilling, collection of water sample for each aquifer formation/fracture zone encounteredadopting standard procedure ,formation sample collection at every 3 meter intervals preparation and submission of litholog, discharge measurem
Sector: Ground Water Dept