procurement of water purifying additives for water treatment plant in d n.h. for the year 2023-24 ( 2nd call ) , supplying of sodium hypochlorite solution ( chlorite solution with drug license as per is - 11673 - 1986 grade i.u.s.p. in 25 / 20 lit. packing including maintenance of all accurate chlorination system fitted at various water supply scheme and spare one person for all time to maintain the chlorination system at different places in u.t. no any extra labour charges will be paid for maintenances. , supply of bleaching powder in 25 kg. packing bears following characteristices as per are 1065:1989. requirement method of grade 02test i. available chlorine percent by mass minimum32.0 a-2 ii. stability loss of chlorine on the basis of 1 / 11a-3 initial available chlorine max. iii. misture percent by mass, max. 0.50 a-4 iv. particle size ( passing through 1.70 mm is99.00 a-5 sieve ) precent by mass, minimum. , supply of alum ferric is 299 : 1989 gradei insoluble matter, ( percentage by mass max ) 0.50 soluble iron compound ( percentage by mass max ) 0.70 water soluble aluminum ( percentage by mass max ) 16.00compound ( alco 3 ) ph ( 5% acqueas solution ) minimum2.70 basicity as a1203 ( percenttage by mass max ) 0.50 , supply of 900 kg.chlorine tank for water treatment plant at silvassa including transportation loading and unloading. , refilling of chlorine gas cylinder of 900 kg. chlorine tank for water treatment plant at silvassa including transportation loading and unloading.