WBPHED/EE/MD/NIeQ _07 of 2021-2022

Amount

Withdrawal of existing clogged filter media from 4 nos., 4.5 m X 5.6 m filter bed, cleaning the inner side of the filter bed properly and refilling the same with new filter media as per specification and depth, all complete as per direction of EIC. at Balupur WTP. [ Depth of sand 650 mm effective size of sand 0.45 mm to 0.7 mm uniformity cofficient of sand 1.3 to 1.7 depth of gravel 450 mm bottom layer 35 mm to 50 mm : 125 mm second layer 12 mm to 35 mm : 100 mm third layer 6 mm to 12 mm : 100 mm to player 2.5 mm to 6 mm: 125m].

DEBAPRIYA SAHA

MILLENNIUM ENTERPRISE