comprehensive maintenance contract of the existing stp, wtp, ro plant and water supply system (including consumables,sparesetc.)for diamond harbour super speciality hospital and kakdwip super speciality hospital in the district ofsouth 24 parganas for 2 year-2nd call- 1 restoration of the entire sewage treatment system, water treatment system, effluent treatment plant (etp)and ro with proper cleaning of equalizer tank, mbbr tanks with fixation of air blowers at the bottom raft, 2 comprehensive operation & maintenance (including all consumables, spares, accessories) for the sewage treatment at diamond harbour and kakdwip super speciality hospital including the cleaning of tanks as and when required. 3 comprehensive operation & maintenance (including all consumables, spares, accessories) for the water treatment plant including the treated water supply system from underground reservoir to all overhead tanks at diamond harbour and kakdwip super speciality hospital. 4 comprehensive operation & maintenance (including all consumables, spares, accessories) for the effluent treatment plant (etp) & reverse osmosis (ro) plant at diamond harbour and kakdwip super speciality hospital