WORK OF DIGGING NEW BOREWELL

Conducting GEO Electric Survey by Computerized Digital deep resistively monitor up to 250 mtr. Depth involving two sounding for one side including hydro geological survey and feasibility report for pin pointing of tube well site.

Construction of tube well by DTH RIG in over burden having pebbles boulders etc using Odex/Tubex system from ground level and up to250 mtr. Depth and above to accommodate housing & assembly pipe of following sizes in all types of alluvium strata and with gravel as per IS 4097 – 1967 and packing as per IS 2800 (Part – I –II) 1979 as amended up to date ( two work includes the cost of gravels and its primary packing and packing during development lowering and housing and strainer assembly pipes, with supply & wrapping of coir rope, wherever necessary, for arresting fine sand particles. The work will include cost of housing pipe and strainer pipe assembly and development work, but work would be completed after obtaining sand free water) 200 mm. nominal bore

Construction of tube well up to 250 meter. Depth and above in all types of rocks by DTH RIG using Odex/Tubex system and over burden, to accommodate casing pipe of following sizes in all types soils and over burden including lowering of casing pipe as per IS 2800 (Part I & II ) 1979 specification the work would be completed after obtaining sand free water. The tube well should have a through out bore as per nominal dia of casing pipe. 200 mm dia nominal bore

Supply of ERW MS Black casing pipes ISI marks make ZINDAL / TATA of size nominal bore of pipe 200 mm. thickness of pipe 5.4 mm

Supply of strainer pipes made of ERW MS black pipe ISI Mark make ZINDAL/TATA of 200 mm. nominal bore size at the site of work including required size of drilling as per IS 8110 – 1985. Thickness of pipe 5.4mm

Supply & Fixing tube well cover of MS sheet (6 mm thick with nuts & bolts) complete for 200 mm. dia Casing

Supply and fixing of shoes beneath the boring

Development of tube well as per relevant ISS specification with Suitable air compressor (minimum capacity 1150 cfm and pressure 7.0 Kg./sqcm.) to give sand free water. The payment shall be made for actual working hour’s subjects to ceiling of maximum 25 hours. As per direction of A.Z.D.U.S.S. Engineer

Development of tube well by continues over pumping for at least 8 hours as described in IS 11189-1985 amended up to date as per clause No. 8 of Schedule- A. Result of pump test is to be provide in format of yield test report & LPM the contractor should also submit the report of water down depth in meters after operation of 8 hours however, the contractor would run the pump for least 24 hours up to the satisfaction of alwar Dairy plant all equipments during pump test & power supply to run the pump should be arranged by contractor