operation, maintenance and guarding of gaseous chlorination plant at ohr zone no- 30 and 34 under arsenic affected area surface based water supply project in south 24 pgs district under s.24pgs mechanical division phe dte.- 1 operation and maintenance of the entire gaseous chlorination plant at ohr zone under supervision of gas plant supervisor round the clock by engaging skilled and unskilled personal per shift along with supply of sundry. the cost includes the visit charges of gas plant supervisor for each visit in every 15 days in a month along with expert technician for servicing w.e.f 01.07.2025 to 30.06.2026 2 zoneno- 30 3 zoneno- 34 4 n.b:- quoted rate should be inclusive of esi, pf as per latest amendment and also comply with the notification no.- 17/stat/12rw/03/2023/lcs/jlc dt 19-06-2024 of the office the labour commissioner, govt of w.b.