assistance in chemical handling , safety , pollution control measures , lubrication , up keeping and removal of sludge from different lagoons / pits in cpo group of plants for the year 2020-22 , safety and pollution control activities covered under item 2 . of scope of work . , safety and pollution control activities covered under item 2 . of scope of work . , lubrication of machinery and other plant activities covered under item 3 . of scope of work . , maintenance of strainers covered under item no . 4 . of scope of work . , up-keeping of naphtha storage area covered under item no . 5 . of scope of work . , sludge lagoons in ptp covered under item 6 . of scope of work . , raw water pumps suction sump covered under item 7 . of scope of work . , sa-4 sa-5 , sa-6in etp covered under item 8 . of scope of work . , guard pond-a near 132 kv sub-station covered under item 9 . of scope of work . , miscellaneous points covered under item 10 . ( a to e of scope of work . ) , , a ) back wash channels cleaning around gravity sand filters in ptp , b ) back wash sump cleaning in ptp , c ) clarifier sludge sump cleaning in ptp , d ) 12 sr-6 cleaning in etp , e ) air stripper sump cleaning in etp , filling of sand covered under item 11 . of scope of work . , carbon removal and charging in beds , a ) removal of activated carbon covered under item 12 . of scope of work . , b ) filling of activated carbon covered under item 12 . of scope of work . , cleaning and disposal of sludge from new fire tank in ptp covered under item no . 13 . of scope of work , cleaning and disposal of sludge from west side lagoon , covered under item no . 14 . of scope of work , removal of pall rings , from s . s . iii in etp , cleaning/descaling of pall rings and putting back in stripper , covered under item no 15 . 0 of scope of work