biannual rate contract to carry out miscellaneous cleaning and other process related jobs in sewage treatment plant of rcf , trombay unit for year 2019-2021 , cleaning of stilling chamber , cleaning of bar screen and detriator area , cleaning of aeration tank launder , cleaning of secondary clarifier , cleaning of hrc , dual media sand filter , cleaning of intermediate storage tank , cleaning of dirty backwash tank , cleaning of final storage tank of capacity 10 , 000 m3 . , rapid gravity sand filter , cleaning of sludge beds , supply of diesel operated de-watering pump ( on 8 hrs shift basis ) , cleaning of chemical preparation tanks , cleaning of solar panel , drain/channel cleaning: a ) road to aeration tank inlet chamber and from east side of aeration tank to east side of fst . , drain/channel cleaning: b ) secondary clarifier ( w ) to thickener . , drain/channel cleaning: c ) mechanical workshop via instrument welfare to parking shed . , drain/channel cleaning: d ) transformer to chemical house west side , drain/channel cleaning: e ) chemical house east side drain going to rgsf blower . , drain/channel cleaning: f ) aeration tank ( w ) side to chemical house , drain/channel cleaning: g ) chemical house west side to stp office building backside up to dmf area , drain/channel cleaning: h ) stp office building east and front side along fst west side up to etp