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