up-gradation and commissioning after conversion of existing 4.5 mld capacity sewage treatment plant based on moving bed biological reactor technology ( attached growth process ) to combined activated sludge process in conjunction with mbbr bio film process with attrition of anoxic tank, individual internal recirculation pumps, return activated sludge pumps, treated effluent lifting pumps in tertiary treatment plant based on dual media filters followed by chlorination in existing stp complete in all respect with plc, data transfer through modem to website and all other works contingent thereto including operation and maintenance of existing stp / mps during up-gradation period and 3 months of trial run period, 12 months defects liability period after and 5 years thereafter on the commissioning of up-graded stp i.e. complete of tertiary treatment plant at kalka, distt panchkula & all other works contingent thereto