assistance in lubrication of machinery , safety and pollution control measures and miscellaneous activities in line-i and line-ii plants ( ammonia and urea ) for 2020-2022 , for line-i ( ammonia-i & urea-i plant ) , lubrication of machinery and other plant activities covered under item 1 . 0 of scope of work . , assistance in safety and pollution control measures covered under item 2 . 0 of scope of work . , prilling tower scrapper and louvers descaling covered under item 3 . 0 of scope of work . , dissolving of off grade urea covered under item 4 . 0 of the scope of work . , assistance in shut downs covered under item 6 . 0 of scope of work . , removal of honey bee combs covered under item 5 . 0 of scope of work . , dissolving tank cleaning covered under item 7 . 0 of scope of work . , for line-ii ( ammonia-ii & urea-ii plant ) , lubrication of machinery and other plant activities covered under item 1 . 0 of scope of work . , assistance in safety and pollution control measures covered under item 2 . 0 of scope of work . , prilling tower scrapper and louvers descaling covered under item 3 . 0 of scope of work . , dissolving of off grade urea covered under item 4 . 0 of the scope of work . , assistance in shut downs covered under item 6 . 0 of scope of work . , removal cleaning and charging of sand in cooling tower filters as per item 8 . 0 of scope of work . , shifting and cleaning of gt/pac suction filters as per item 9 . 0 of scope of work .