N.I.T. No.05 EE(SDW)-XI 2026-27 ITEM NO. 2

Disconnect the power connection of the gear box on which the work will be carried out and as a precaution switch off the power supply to all gear boxes of that aeration tank. Cleaning the 16 aeration fans with the help of divers, helpers, air compressor, and safety items like gumboots, diving suit, helmet, safety belt, oxygen mask, oxygen cylinder, life jacket, lifebuoy, portable ladder, ladder, cleaning blade, bucket, rope, First Aid Kit and other safety equipment suitable for cleaning aeration fans in deep chamber. Lifting the debris and floating material stuck on the blade of fans. Lifting the debris and floating material on the aerator platform with the help of bucket and rope and then disposing it in the dumping yard of Mehrauli STP. Tightening all the nut bolts of the coupling, fan etc. Reconnect the aerator supply and start all the aerators of the aeration tank.