annual comprehensive maintenance and operation of 40 kld sewage treatment plant installed at new building of police station badarpur , new delhi , comprehensive maintenance of sewerage treatment plant ( stp ) of 40 kld capacity based on sbr technology i / c servicing of blower belt and cleaning with chemicals , cleaning and distilling of sludge drying and refilling media , periodical back washing of the filters with required solution and fixing of acm and dmf media i / c disposal of existing media and refilling the fresh media , replacement / repair of various electrical items like indicating lamps , meters , wires / cables , mccb , motor pump set , servicing of pump i / c rewinding of motors etc , checking leakage from gland packing of pumps and replacing the same , checking and lubricating all bearings and replacing the defective bearings , checking of all pipes , valves , joints , strainers , handles etc and repair all as per requirement i / c repairing , servicing & replacement of defective / wornout electrical , electromechanical , mechanical parts and equipments and associated accessories of stp plant as per inventory and term & condition attached including providing all type of consumables items required for the stp system in functional and keeping the machinery in good working condition , i / c testing and commissioning of all minor leakages and defects etc as reqd . as per engineer-in-charge . , routine maintenance & operation of sewerage treatment plant ( stp ) of 40 kld capacity based on sbr technology in two shifts daily , cleaning floors , taking out the sludge and proper cleaning of stp i / c watch & ward of stp by providing following staff in all days including sunday and holidays:- : i ) operator ( semi-skilled ) for stp -02 nos . - ( one no . in each shift i . e 6 . 00am to 2 . 00 pm & 2 . 00pm to 10 . 00pm ) , supply & dropping of liquid microbial inoculants for the removal of foul odour from the stp and to maintain proper mlss in the areation tank etc . complete as reqd . , supply and dropping of liquid hypo solutions-30 l per month , urea and dap -30 kg each and jaggery 50 kg per months as required for the dosing in aeration tank for necessary nutrient and culture growth and to maintain proper mlss in the areation tank etc . complete as reqd . , submission of two monthly test reports of untreated sewage and treated water from dpcc / nabl authorized lab with following parameters . a ) cod b ) bod c ) tss d ) oil & grease e ) ph