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64th Annual Water Industry Engineers and Operators Conference All Seasons International Hotel – Bendigo, 5 and 6 Sep tember, 2001 Page No 41 An important property of polyaluminium coagulants is their basicity.This is the ratio of hydroxyl to alu
GUIDELINES FOR DRINKING-WATER QUALITY 54 Table 4.1 Minimum frequency of sampling and analysis of unpiped water supplies Source and mode of supply Minimum frequency of sampling and analysis Remarks Bacteriological Physical/chemical Open wells for