Mains Rehabilitation

2. II.1.4

This project includes, but is not limited to the following packages of work: A new chemical storage and dosing system to aid Phosphorus removal A new pre-aeration primary tank supernatant and RAS mixing and Optimisation, structural replacement or relining of distribution chamber A new activated sludge aeration lane that matches existing with two new 35 m diameter final settlement tanks water mains within DMAs and RAS system A new Tertiary Solids Removal treatment stage A new standby power facility A new centrate storage tank bounded by district meters and pump system to return centrate for treatment the District Boundary Valves. A new Picket Fence Thickener · Structural replacement of all service connections from the distribution mains to operate in parallel to two existing units customer boundaries, including installation of a suitable boundary box. A new liquor return pump station · Replacement of all apparatus connected to return site liquors for treatment the network including valves, hydrants, disinfection points, air valves, etc. · Securing abandoned mains by cutting and capping. Removing surface covers, marker posts and plates of abandoned washouts, hydrants and valves etc. so that only covers relating to live apparatus remain.