annual maintenance contract for operation of pump sets and sanitary maintenance of sol staff quarters at dhaka complex delhi annual maintenance contract for operation of pump sets and sanitary maintenance of sol staff quarters at dhaka complex delhi , comprehensive annual maintenance contract charges for operation and maintenance of pump sets with booser pump 15 hp 3 phase 440 v with all equipments , entire water supply pipe line ( incoming and outgoing ) bbm depot to under ground water storage tank and eater supply tank to booster pump to overhead sintax tank of sol staff qtrs . , dhaka compled , delhi , comprehensive annual maintenance contract for operation and maintenance of 2 nos . submersible pump 1 hp with electric panel and complete pipeline submersible pump to overhead tank for staff qtrs . ( type i & ii ) , to attend the complaint of day to day maintenance work relating to sanitary/drainage/water supply work , seepage in w/c , bathroom , kitchen and other sanitary work for 56 nos . sol staff qtrs . at dhaka complex . only for labour . 1 . material used for replacing in staff qtrs . will be paid by the deptt . to the contractor as per dsr-2016 basic rates ( material ) / market rate . ( no labour charges will be paid ) . 2 . consumable material used for repairing work will be arranged by the contractor for which nothing will be paid extra . , cleaning of terrace/loft water storage tank ( inside surface are ) upto 2000 litre capacity at all heights with coconut brushes , duster etc . , removal of silt , rubbish from the tank and cleaning the tank with fresh water disinfecting with bleaching powder @ 0 . 5 gm per litre capacity of tank , including marking the date of cleaning on the side of tank body with the help of stencil and paint and disposing of malba , all complete as per direction of engineer-in-charge . ( the old date already written on tank should be removed with paint remover or black paint and if date is not written with the stencil or old date is not removed deduction will be made @ rs . 0 . 10 per litre if during cleaning any gi fittings or ball cock is damaged that is to be repaired by contractor at his own cost and nothing extra will be paid on this account ) , cleaning of underground sump / over head r . c . c . tank ( independent staging ) including disposal of slit and rubbish , all as per direction of engineer-in-charge . the cleaning shall consist following operations: ( i ) tank shall be emptied of water by pumping &bottom shall be cleaned of slit and other deposits . ( ii ) entire surface area of the sumpp shall then scrubbed thoroughly with wire brush etc . and pressure washed with water . ( iii ) chlorination of rcc internal surface by liquid chlorine ( iv ) the treated surface shall be dried using air jetting and all loose particles shall be removal from the surface . ( v ) finally , the surface shall be treated with ultraviolet radiation etc . as per direction of engineer-in-charge . , cleaning and desilting of gully trap chamber , including removal of rubbish mixed with earth etc . and disposal of same , all as per the direction of engineer-in-charge , cleaning of chocked sewer line by diesel running vehicle mounting hydraulic operated high pressure suction cum jetting sewer cleaning machine fitted with pump having 4000litres suction capacity and 6000litres water jetting tank capacity including skilled operator , supervising engineer etc . for cleaning and partial desilting of manholes and dechocking of sewer lines . dechocking and flushing of sewer line from one manhole to another by high pressure jettig system of 2200 psi for sewer line from 150 mm dia . upto 300 mm dia . for all depth . , cleaning and desilting of manhole i/c removal rubbish mixed with earth etc . and disposal of same cleaning after every 3 months .