cleaning of chocked box culvert infront of east enclave to e canal approach across the mar by diesel running vehicle mounting hydraulic operated high pressure suction cum jetting cleaning machine in new town, kolkata.- 1 cleaning of chocked sewer line or box drain or any kind ofclosed conduit by diesel running vehicle mounting hydraulicoperated high pressure suction cum jetting cleaning machine fitted with pump having 4000 to 9000 litres suction capacity and 6000 to 9000 litres water jetting tank capacity including skilled operator, supervising engineer etc. for cleaning and partial desilting of manholes and dechocking of sewer lines or box drain or any kind of closed conduit. dechocking and flushing of pipe line from one manhole to another by high pressure jetting system of 2200 psi or 160 bar for sewer lines or box drain or any kind of closed conduit of any section. 2 hire charges of hydraulic excavator of 1 cum bucket 3 bailing out water by pump including all leads and lifts andincluding making all arrangements for disposal, wherecontinuous flow or seepage of water is encountered and rating of pumps and hours of operation is specifically ascertained as per direction of the engineer-in-charge. 4 add cgst @9% of total amount to rs.1,44,425.55 5 add sgst @9% of total amount to rs.1,44,425.55 6 add construction cess @1% of total amount to rs.1,44,425.55