tender for sterilization of esr, gsr and wtp water department- 1 aeration fountain & mixing channel cleaning , by using bleaching powder at the rate of 14 gm / sq.m. washing thrice with potassium permanganate at the rateof 2.50gm / sq.m. finally, cleaning washing by using nylon brush, coir string and duster, bailing out water etc. complete. 2 cleaning of 3 mld capacity water treatment plant tanks cleaning, flocculator tank, tube settlers tank , rapid sand filter mediatank etc all units all internal sides of water tanks shall be properly cleaned , internal walls of water tank bottom , side walls internal openings , partition walls , bottom haunch surfaces etc. shall be cleaned with pressure jet. cleaning operation shall involvede watering of water tanks up to 100-150mm water table in tanks , obtaining necessary permissions etc. complete cleaning, suction, disposal activity and thereafter.work and allied complete as per direction ofnagarpanchayat shirala. cleaning activity shall be started with emptying tanks, brushing of rcc walls with nylon brush , use of appropriate cleaning solution , cleaning chemicalwith water to ensure no fungus or algae remains on walls. work shall be taken-up as per sequential manner given by wtp cleaning of walls, base , roof , corners , funnels, etc. complete. cleaning cycle shall be as per the schedule issued by nagarpanchayat 3 gsr tanks / cleaningof waterstoragetanksincluding chemicaltreatmentwithantibacterialagentconsistingoffollowingprocess:-dewatering the tank with submersiblepump, de-silting and removing of leftover dirty waterupto100to150mminthebottomofthetankandsludgewith special sludge pump, cleaning of walls and ceiling with special mechanized highpressurejetmachinesbyrotaryjetsystemat150barpressure ( 150 kg / sq cm ) which dislodges the layer of dirt, algae, fungus stuck on its surface usage of scrubbing machines for old stains andcleaning chemicals ifrequiredoffloorofthedirtytankshouldbe thoroughlycleanedupbyfryjetcleanertoaccumulatealldirt, the remaining sludge should then be removed by sludge pumps, the dirt silt and otherforeignmaterialshouldfurtherberemovedbyindustrialvacuumcleanerstomakethefloortotallydirtfree, application / sprayingofanti bacterialchemicalstoensuretotalsterilizationoftankfromtheinside, insideofthetankshouldbetreatedwithspeciallydeveloped long ultravioletradiator tokillfurtherfloating bacteria / virus inorder tomake the tank totally clean, bacteria free and safe for storage of drinking water chemical. 4 cleaningof esr water storage tanks including treatment with anti bacterial agent consisting of following process:-dewatering the tank with submersiblepump, de-silting and removing of leftover dirty waterupto100to150mminthebottomofthetankandsludgewith special sludge pump, cleaning of walls and ceiling with special mechanized highpressurejetmachinesbyrotaryjetsystemat150barpressure ( 150 kg / sq cm ) which dislodges the layer of dirt, algae, fungus stuck on its surface usage of scrubbing machines for old stains andcleaning chemicals ifrequiredoffloorofthedirtytankshouldbe thoroughlycleanedupbyfryjetcleanertoaccumulatealldirt, the remaining sludge should then be removed by sludge pumps, the dirt silt and otherforeignmaterialshouldfurtherberemovedbyindustrialvacuumcleanerstomakethefloortotallydirtfree, application / sprayingofanti bacterialchemicalstoensuretotalsterilizationoftankfromtheinside, insideofthetankshouldbetreatedwithspeciallydeveloped long ultravioletradiator tokillfurtherfloating bacteria / virus inorder tomake the tank totally clean, bacteria free and safe for storage of drinking water.