periodical cleaning and maint of sewage treatment plant and misc e/m works at af station suratgarh , boq ( periodical cleaning and maint of sewage treatment plant and misc e/m works at af station suratgarh ) , dewatering the left over water from existing old sewage water storage tank of existing storage capacity , having round shape bottom plan size 5 meter and depth 9 meter , desalting , sludge , silt , all accumulate material with mud and sewage sludge from the bottom and sides and removing and cleaning , desalting , sludge , silt , all accumulate material with mud and sewage sludge from the bottom and sides from the outer perimeter of tank and depositing/spreading where directed by engr-in-charge including preparation of surface by wire brushing and washing the surface with 2% potassium permanganate solution for disinfection and applying one coat of white wash including removal of roots and uprooting of grass etc . all around up to 3 meter from plinth of old sewage tank , and removing mud and sludge out from area of sewage treatment plant , complete all as specified and directed by engr-in-charge . , dewatering the left over water from existing still chamber and per screen chamber of existing storage capacity , having size 3x1 . 5 meter and depth 2 meter , desalting , sludge , silt , all accumulate material with mud and sewage sludge from the bottom and sides and removing and cleaning , desalting , sludge , silt , all accumulate material with mud and sewage sludge from the bottom and sides from the outer perimeter of tank and depositing/spreading where directed by engr-in-charge including preparation of surface by wire brushing and washing the surface with 2% potassium permanganate solution for disinfection and applying one coat of white wash including removal of roots and uprooting of grass etc . all around up to 3 meter from plinth of still chamber and per screen chamber and removing mud and sludge out from area of sewage treatment plant , complete all as specified and directed by engr-in-charge . , dewatering the left over water from existing sludge holding tank of existing storage capacity , having size 6x8 meter and depth5 meter , desalting , sludge , silt , all accumulate material with mud and sewage sludge from the bottom and sides and removing and cleaning , desalting , sludge , silt , all accumulate material with mud and sewage sludge from the bottom and sides from the outer perimeter of tank and depositing/spreading where directed by engr-in-charge including preparation of surface by wire brushing and washing the surface with 2% potassium permanganate solution for disinfection and applying one coat of white wash including removal of roots and uprooting of grass etc . all around up to 3 meter from plinth of sludge holding tank , and removing mud and sludge out from area of sewage treatment plant complete all as specified and directed by engr-in-charge . , dewatering the left over water from existing chlorine content tank of existing storage capacity , having size 6x8 meter and depth5 meter , desalting , sludge , silt , all accumulate material with mud and sewage sludge from the bottom and sides and removing and cleaning , desalting , sludge , silt , all accumulate material with mud and sewage sludge from the bottom and sides from the outer perimeter of tank and depositing/spreading where directed by engr-in-charge including preparation of surface by wire brushing and washing the surface with 2% potassium permanganate solution for disinfection and applying one coat of white wash including removal of roots and uprooting of grass etc . all around up to 3 meter from plinth of chlorine content tank , and removing mud and sludge out from area of sewage treatment plant complete all as specified and directed by engr-in-charge . , dewatering the left over water from existing equalize tank of existing storage capacity , having size 3x5 meter and depth7metre , desalting , sludge , silt , all accumulate material with mud and sewage sludge from the bottom and sides and removing and cleaning , desalting , sludge , silt , all accumulate material with mud and sewage sludge from the bottom and sides from the outer perimeter of tank and depositing/spreading where directed by engr-in-charge including preparation of surface by wire brushing and washing the surface with 2% potassium permanganate solution for disinfection and applying one coat of white wash including removal of roots and uprooting of grass etc . all around upto 3 metre from plinth of equalize tank , and removing mud and sludge out from area of sewage treatment plant complete all as specified and directed by engr-in-charge . , cutting and uprooting grass , vegetation shrubs , bushwood undergrowth , roots and trees not exceeding 30 cm girth ( measure one metre above ground level ) and removing rubbish to a distance upto 50 metres outside the periphery of the area , and out from area of sewage treatment plant complete all as specified and as directed by engr-in-charge . , taking up or down steel tubing and connections of size 100 mm bore with connected valves , including internal cleaning of pipe and connected valves and removing from sludge and mud deposited inside the pipe and cleaning pipe internally with clean water pressure and refixing of pipes with suitable nuts and bolts as existing location complete all as specified and directed . , taking up or down steel tubing and connections of size 150 mm bore with connected valves , including internal cleaning of pipe and connected valves and removing from sludge and mud deposited inside the pipe and cleaning pipe internally with clean water pressure and refixing of pipes with suitable nuts and bolts as existing location complete all as specified and directed . , taking up or down steel tubing and connections of size 40/50/75 mm bore with connected valves including internal cleaning of pipe and connected valves removing from sludge and mud deposited inside the pipe and cleaning pipe internally with clean water pressure and refixing of pipes with suitable nuts and bolts as existing location complete all as specified and directed .