bids are invited for cleaning, sanitation and disinfection service - outcome based - railway colony; cleaning and desilting of small size surface drain upto 12 inch including cleaning of one meter area on both sides as per sno 1 of scope of work attached; drains , cleaning, sanitation and disinfection service - outcome based - railway colony; cleaning and desilting of medium size surface drain depth of more than 12inches including cleaning of one meter area on both sides of surface drain as per sno 2 of scope .. , cleaning, sanitation and disinfection service - outcome based - railway colony; cleaning and desilting of big drains including cleaning of two meters area on both side of drain as per sno 3 of scope of work attached; drains , cleaning, sanitation and disinfection service - outcome based - railway colony; cleaning and removal of blockage of manholes of sewer lines toilet seats of railway quarters and gully traps as per sno 4 of scope of work attached; indoor and outdoor , cleaning, sanitation and disinfection service - outcome based - railway colony; mechanized cleaning of sewer lines removal of blockage of sewer lines using high pressure sewer cleaning and jetting machine as per sno 5 of scope of work attached; sewer.. , cleaning, sanitation and disinfection service - outcome based - railway colony; conservancy work for removal and disposal of waste which includes rubbish garbage slit mud garbage heaps etc including rag picking brooming and proper disposal of dead bo.. , cleaning, sanitation and disinfection service - outcome based - railway colony; brooming sweeping and rag picking of roads and area on both sides of roads parks and railway institute ground as per sno 7 of scope of work attached; outdoor