tender for supply ,installation,geo tagging and maintanance of ring compost units , supply ,installation,geo tagging and maintanance of ring compost units , a. ferro cement ring of internal diameter 0.7m, thickness 2.5cm and height 0.5m placed over a circular ferro cement slab of diameter 0.75m and thickness 2.5cm. the ring will have a hole of diameter 2.5cm at the bottom for the leachate to flow out. b. circular ferro cement cover slab of 0.75m diameter and 2.5cm thick with central circular hole of 0.30m diameter to cover the ring, a lid which can be removed and refitted back for loading the waste into the ring and closing it tightly after loading the waste