replacement of pipes, pumpsets in tambaram pallavaram cwss in chengalpattu district (construction period: 12 months and free maintenance: 3 months).- replacement of pipes, pumpsets in tambaram pallavaram cwss in chengalpattu district (construction period: 12 months and free maintenance: 3 months). 2 construction of infiltration well 4.5m dia and 9.0m depth at pazhayaseevaram, vengudi and melacheri hws- 7 nos 3 supply, delivery, laying and jointing ow submersible pumpsets, 3 core armoured aluminium conductor cables and rejunevation of existing infiltration wells at head works 4 construction of infiltration well 4.5m dia and 9.0m depth at pazhayaseevaram, vengudi and melacheri hws- 7 nos 5 supply, deliverylaying and jointing ofconnecting main 150mm di d/fpipe including anchoring arrangements for proposedinfiltration well, inter connection works, rejunevation of existing infiltration wells 6 replacement of existing 60hp vt pumpsets with new vt pumpsets at pazhayaseevaram, 75 hp hsc pumpsets with new hsc pumpsets and supply, delivery and erection of lt cubical panel board at vengudi, 75 hp hsc pumpsets with new hsc pumpsets at kadaperi, 170 hp vt pumpsets with new vt pumpsets at devariambakkam bs, 20 hp open well submersible pumpsets with at melachery hw, 7 supply, delivery and erection of transformer, vfd and allied works at kadeperi, vengudi and devariambakkam 8 rejuvenation of thirumukkudal head works 9 construction of pump room 8m x 6m with water supply & sanitary arrangements. 10 construction of compound wall (20 m x 20 m) around sump at zone-1 11 350mm di k7 s/s pipe under thirumukkudal bridge with anchorage arrangements - 400m 12 painting of headworks, booster station pumproom and allied works 13 provison for sanitary arrangemets 14 provision for compound wall at vengudi hw 15 maintanence of the scheme 16 add gst @ 18% on basic value