AR and MO Water Supply Sub Division No I under PHED APWD Prothrapur during 2021 22 SW Supplying of Ferric alum Grade IV

Amount

Supplying of Ferric alum Grade-IV in solid form for treatment of water intended for drinking conforming to IS: 299: 2012 (Fifth Revision) having following requirements: 1) Insoluble matter, percent by mass, Max-0.2 2) Soluble iron compound (as Fe), percent by mass, Max-0.04 3) Water soluble aluminium compound (as AL2O3), percent by mass, Min-16 4) pH (5% of aqueous solution), Min-2.7 5) Free acidity (as H2SO4), Basicity (as AL2O3), percent by mass, Max-0.5 6) Lead (as Pb), PPM, Max-20 7) Arsenic (as AS2O3), PPM, Max-4 8) Mercury (as Hg), PPM, Max-0.4 9) Manganese (as Mn), PPM, max-20 10) Chromium (as Cr), PPM, Max-20 11) Cadmium (as Cd), PPM, Max-4 12) Selenium (as Se), PPM, Max-4 13) Organic impurities: a) Phenolic compounds (as C6H5OH), PPM, Max-0.4 b) Aniomic detergents (as MBAS), PPM, Max- 80