Construct effective volume 192m3 Septic Tank out of reinforeced concrete wall on a base of 200mm thick R.C concrete bottom slab, RC top & bottom slab and reinforced concrete manhole cover. The work shall be carried out in accordance with the given sanitary and structural drawings & instructions. Price shall include excavation to the required depth, backfilling, cart away, internall wall water proofing and all the necessary assistance and incidental works. It is highly adviseable to refer the drawing during price fixing