In June 1936 preliminary to initial operations at its new water purification plant, the Hammond Water Department, through its supervising engineer, undertook to set up a complete specification for the purchase of all chemicals required for the operation of the plant. The Notice to Bidders, Instructions to Bidders, Proposal, Contract, Specifications, and Performance Bonds were patterned along the same lines as construction work is handled by the Department. This method of purchasing chemicals, however, did not prove very popular and considerable discussion and explanation was entered into concerning its merits and demerits with prospective bidders but in spite of all objections to this form of bidding, a substantial number of bids were received on all chemicals; the largest number of bidders being those bidding on activated carbon.Preliminary investigations on the water to be treated indicated that a substantial amount of carbon would be used at the plant and since it also appeared that the yearly expenditure for this particular chemical would in all probability exceed that made for other chemicals, all available data were consulted to determine how this specification could best be set up. It might be pertinent to add at this point that the carbon requirement for the first year of operation of the plant will aggregate approximately 625,000 pounds, costing about $25,000, and exceeding the estimated requirements by about 400 percent.A review of the available literature on carbon, including the preliminary drafts of the report of the Committee on Water Purification Chemicals, together with what information could be obtained from those who had experience with the material, and plant practices elsewhere, lead to the conclusion that while it might be desirable to
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