Operation & maintenance of STP, IETP & SUMP WELL for two years under SSE/ STP, Repair & Calibration Of Flow Meters of STP & IETP, Repair to existing on line water analyzers, Monitoring of Air, Noise, Sludge, Waste Oil etc. for Two years, Repair to clarifier wheel, surface Aerator of STP BLW, Varanasi.