1 ( one ) year operation & maintenance of primary treatment system of sewage water including supply of consumable for disinfection and manpower at three numbers of primary sedimentationtanks at ward no.- 13 & 17 within ghatal municipality- 1 wbphed / sor / me / 2019 / 1 st pubsupply and delivery at site of calcium hypochlorite granule minimum cl content 60% - 65% in air tight plastic jar ( 3 kg each ) as per direction of eic ( make phe approved ) .test certiificatecontaining toxic element will be submitted at the time of delivery with showing chlorine percentage of the above materials.quantity of sewage = 12.96 mldchlorine dosing rate ( assumed ) = 0.5mg / lquantity = ( 12.96 x 0.5 ) / 60% = 10.8 kg / day say 11 kg / day for 365 days @ 11 kg / day = 4015 kg 2 pwd ( s & p schedule 2017 ) , it- 1, 2, pg- 113.manpower for operation of chlorination system mistri365 days @ 1 persons per day = 365 personsrate - rs. 326.00 + 10% profit + 1% labour welfare cess 3 pwd ( s & p schedule 2017 ) , it- 1, 2, pg- 113.manpower for operation of chlorination system methor ( mazdoor ) 365 days @ 1 persons per day = 365 personsrate - rs. 296.00 + 10% profit + 1% labour welfare cess 4 ud & ma, s & d sor, it-19, pg- 17cleaning of floating materials / garbage / any other foul materials from incoming sewer of drainage pumping station / adjoining penstock gate / open nikashi / lock gate at canal etc. by mathor labour after removing concrete slab / manhole cover etc. without damaging the same and refixing the same properly after cleaning as necessary and removing the sludge etc. by using iron pans, buckets including all labour, tools & plants including expulsion of impure / inflammable / asphyxiating gases from the drains etc. and removing the spoils in dry condition and disposing the same by truck beyond the area of municipal corporation / municipality / notified area authority / industrial township authority etc. for such disposal including the cost of loading, unloading, transportation and making arrangement of necessary land for disposal, spreading and leveling as necessary etc. and cleaning the road side in all respects, complete as per direction of the engineer- in-charge. ( land for disposal to be arranged by the contractor ) . ( payment will be made on the basis of actual stack measurment of spoils in dry condition at roadside ) assuming collected garbage @ 3 cu.m / day365 days @ 2 cu.m / day= 730 cu.m 5 cess @ 1%