Details: main tenance od22216/2024-2025:man coolies for various type of work 14.78:cleaning of under ground sump, over head r.c.c. tank ( independent staging) including disposal of slit and , all as per direction of engineer-in-charge. the cleaning shall consist following operations:- (i)tank shall be emptied of water by pumping & bottom shall be cleaned of slit and other deposits. (ii) entire surface area of the sump shall then scrubbed thoroughly with wire brush etc. and pressure washed with water. (iii) chlorination of rcc internal surface by liquid chlorine. <br> (iv) the treated surface shall be dried using air jetting and all loose particles shall be removal from the surface. (v) finally the surface shall be treated with ultraviolet radiation etc. as per direction of engineer-in-charge. 22.25.1:providing and applying crystalline mortar by mixing in the ratio of 4.5 : 1 (4.5 partscrystalline mortar : 1 part water) for the treatment of faulty construction joints, cracks,tie rod h
Sector: RDPR