bids are invited for custom bid for services - cleaning and desilting of gully trap chamber including removal of rubbish as per the description of item no 1 of schedule of quantities , custom bid for services - lifting of chamber cover cleaning desilting and removal of sludge silt brick bat debris as per the description of item no 2 of schedule of quantities , custom bid for services - cleaning of chocked sewer line by diesel running vehicle mounting hydraulic operated high pressure suction cum jetting as per the description of item no 3 of schedule of quantities , custom bid for services - providing services of belder cum sewer man equipped with necessary tp for attending day to day complaints as per the description of item no 4 of schedule of quantities , custom bid for services - cleaning and removal of dirt soiled material of storm water drains manually with all safety measures and equipments as per the description of item no 5 of schedule of quantities total quantity :