annual operation and maintenance of 1 (one) no.airp (gravity type at subarnabehar z-iwss) of 231 cu.m capacity located inkrishnagar-i block of nadia district under kalyani sub-division-ii under nadia division, phe dte. for the period of 06 months = 183 days- 1 daily operation of airp through engagement of an airp operator. 2 engagement of a technical person to manage onsite activities to ensure smooth operation and maintenance of the airp including daily water quality checking etc. (note :- 1 no. technical supervisor is provided for maintenance of 2 nos. airp, so. rate for each airp = rs.12643.00/2 = rs.6321.50). 3 regular maintenance of airp inclusive of all necessary manpower, accessories and cosumables (except chemical). 4 (i) civil 5 (ii) mechanical 6 collection of raw water & treated water sample for chemical & bacteriological testing of different parameters periodically as per normsof phe dte. carrying to designated phe / phe approved ngo laboratories and submission of report to the eic at regular intervalby the contractor at his cost during the o & m period. 7 supply of chemical dosing materials of best quality approved by eic. 8 supply & delivery of sodium hypochlorite with availablechlorine ttrade present 6 &availablechlorine 60 mg/hr. in air tight plastic jar as per direction of eic. (150 lit. / day = 27450 lit.) 9 supplying alum bar of approved brand includingall charges and free delivery at site. ( 13 kg / day =2379.00 kg) 10 additional amount if required, in case of enhancement of rate if any of valve operator / pump operator etc. as per go circulated time to time by the department within this period as per direction of eic. 11 [ note :- (i) gst @ 18% included in sl. no. 1.01 to sl. no. 1.06 i.e in all items ;(ii) cess @1% in all items excluding in sl no. 1.051 & sl. no. 1.052]