operation and maintenance of sewage treatment plants capacity of 300 kld and 800 kld at nit - trichy , man power ( part -a ) , detailed scope of work mentioned in pg no . 30 . , consumables ( part -b ) , supply of sodium hypo chlorite ( more than 100mg/l ) including freight charges , supply of bio culture/ urea including freight charges , jcb hiring charges including all conveyance and diesel , supply , discharging and refilling of gear oil to the aerator pump , blower ( 320 grade oil ) including freight charges , supply and installation of 95mm rubber spyder washer ( red colour ) for motor and pump joints including freight charges , etc . , , supply and installation of 100 mm rubber spyder washer ( red colour ) for motor and pump joints including freight charges , etc . , , supply and installation of 95mm motor pump ms metal coupling for motor and pump joints including materials cost , lathe works , transport , conveyance etc . , , supply and installation of 100mm motor pump ms metal coupling for motor and pump joints including materials cost , lathe works , transport , conveyance etc . , , supply and installation of 3mm white insertion rubber sheet for the motor pump joints , valves , including etc . , , supply and installation of 8 mm silicon oil gland rope for the motor , valves , coupling at motor and pump joints including etc . , , supply and installation of 10 mm silicon oil gland rope for the motor , valves , coupling at motor and pump joints including etc . , , supply and installation of nlgi 2 grade grease for applying at the joints of motor and mono block pumps including etc . , , supply and installation of 65mm x 600mm fine diffuser epdm , 3 cum / hr for aeration process including etc . , , sludge removal from drying bed and transporting to the nearest location ( within nit campus through vehicle of capacity 120 c . ft ) in hired load vehicle including all conveyance etc . , , sludge removal from collection tank and transporting to the nearest location ( within nit campus through vehicle of capacity 120 c . ft ) in hired load vehicle including all conveyance etc . , , filter media change in the 3 nos of filter tower with activated carbon , pebbles , including etc . , ( river sand will be supplied by nitt ) , supply and installation of 5mm neoprene rubber sheet for clarifier including etc . , , sump cleaning with pressure jet nozzle cleaning equipments by own means , supply of bleaching powder including freight charges , service charge per year ( ---- % )