2 desilting of deep main peripheral sewer line 300 to 600 mm dia by super sucker machine along najafgarh drain road in tri nagar ac-16 under ee ( nw ) iii . , desilting and taking out of debris / silt / rubbish etc . from trunk sewer which is heavily surcharges by mechanical device as like super sucker machine / mechanical device i / c safe disposal of silt with in muncipal limits and there after cctv survey of sewer line with plan & tilt ratated camera and recording and giving three set of cd or cassete as directed by engineer-in-charge . sealing of all joints of the sewer line found leaking with admixture of cement and other suitable chemical installation of adequate number of over pumping , system lead proof stanking arrangement of u / s & d / s side working length temporary rising main etc . to for smooth flow of sewerage system to avoid flood in the area supply of all material , labour tool & plants temporary power connection with standby generator set of capacity of at least 62 . 5 kva , gas detector forced air ventilators etc . & provision of safety equipment as per guide lines laid in is 11972 ( 1987 ) / international standard , traffic control arrangement and proper lighting at night barricading display of sign boards insuarance of workman & cleaning of site removal of all hindrances / obstructions , unforseen items permissions from other departments ( department will only assist in getting the permission etc . ) cutting of bituminous road , excavation , demolising of brick work in taper portion of the m / h & restoring & getting the same constructed complete; . all inclusive & nothing extra shall be payable . 600 mm dia , 533 mm dia , 450 mm dia , 300 mm dia