operation and guarding of pumping machineries and other electro mechanical installation at zone i p/h( chabra) of onda water supply scheme under bankura mechanical divn. p.h.e.dte- 1 labour charges for 3 (three) nos. operating personnel for operation and guarding of pump / valve / disinfection arrangement with all accessories. 2 esic contribution of empleyers for sl no-(1) 3 epf contribution of empleyers for sl no-(1) 4 supervision charges for electrical installation by licensed electrician having requisite parts as per ie rules 1956 with latest amendments and overhead expenditures for the above period. 5 add: 1% cess