supply of chemicals for treatment of effluent and water at rubber park irapuram ernakulam supply of chemicals for treatment of effluent and water at rubber park irapuram ernakulam , supply and stacking of aluminium sulphate, non ferric ( alum powder ) confirms to is : 260, 2001 ( packed in hdpe bags ) , supply and stacking of sodium hypochlorite solution confirm to grade 1 as specified in is11673 :1992 ( in air tight plastic cans, empty cans will be returned after use ) , supply and stacking of hydrated lime powder confirms to is : 1540 ( part 1 ) , 1980 ( packed in hdpe bags ) , supply and stacking of bleaching powder, stable confirms to is : 1065, 1989 ( packed in hdpe bags )