tender for dharuhera town :- annual maintenance estimate for sewerage scheme dharuhera town for the financial year 2025-26. operation and maintenance of 9.50 mld stp at village kharkhra for dharuhera town including all required items for repairing of nonclog sewage submersible pumping machinery and horizontal pumping machinery of stp and mps at nrp bass road along with its rising main, repairing of transformer, repairing of dvr, cable for cctv cameras at stp. providing sewer safety kit. monthly testing of stp parameters and testing of sewer s les. operation and maintenance of complete chlorination system, operation and maintenance of all size of s.w pipe, reinforced cement concrete and hdpe sewer pipe, desilting of various size sewer line of. operation and maintenance of effluent pumping stations along with hdpe 710 mm o/d rising main and all other works contingent thereto for 3 years from the date of commencement and all other works contingent there to.