Tender For corrigendum : design, engineering, build,operate and commissioning of 11.35 mld capacity sewage treatment plant at aathur b revenue village with sequential batch reactor (sbr) technology with ttuf 11.35 mld for a construction period of 24 months and performance trial run 6 months followed by 10 years of operation and maintenance for underground sewerage scheme to chengalpattu municipality in chengalpattu district