cleaning of chocked sewerage septic tank and allied work back side of residential quarters at shq bsf malda; 1 clearing grass and removal of the rubbish up to a distance of 50 m outside the periphery of the area cleared. 2 providing and laying in position specified grade of reinforced cement concrete, excluding the cost of centering, shuttering, finishing and reinforcement - all work up to plinth level :1:2:4 ( 1 cement : 2 coarse sand ( zone-iii ) derived from natural sources : 4 graded stone aggregate 20 mm nominal size de rived from natural sources ) 3 centering and shuttering including strutting, propping etc. and removal of form for foundations, footings, bases of columns, etc. for mass concrete 4 cleaning of septic tank including removal of sludge by manually labour and disposal by excavating pit of requred size complete as per direction of engineer -in charge 5 removing chokage of hci or sw pipe with splite bamboo ( a ) underground