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. , <br /> COUNCIL COMMUNICATION FORM <br /> PURCHASING& 1NTERNAL SERVICES MEMOR.ANDUM <br /> #09-16 <br /> March 23, 2009 <br /> TO: Honorable Mayor Carrigan and City Council <br /> FROM: Ryan P. McCrady, City Manager �� <br /> Ron Neufeld, Financial Management Director � <br /> Deborah M. Perry, Purchasing Superviso� <br /> SUBJECT: Bids for water treatment chemicals <br /> SUMMARY RECOMMENDATION: Staff recommends awarding contracts to the low bidders listed <br /> on Exhibit A for each of the water treatment chemicals for May 1, 2009—Apri130, 2010. <br /> BACKGROUND: The following is a list of the chemicals and how they are used in the water <br /> purification process. <br /> Alum—to coagulate; clarifying agent <br /> Carbon—used for taste and odor control; control of atrazine <br /> Carbon Dioxide—lowers the PH level, due to lime <br /> Chlorine—disinfectant, required by law <br /> Hydrofluosilicic Acid—reduces cavities; required by law . <br /> Lime—softening agent <br /> Polymer—used as coagulant; lowers turbidity <br /> Sodium Bisulfite—removes chlorine <br /> Sodium Chloride—pulls nitrates from water <br /> Sodium Chlorite—disinfectant; used for taste and odor control <br /> Sodium Hexametaphosphate—used to counteract lime; prevents scaling; filter protection <br /> Sodium Hydroxide—increases alkalinity to meet lead and copper rule <br /> The low bidders have provided the City with the necessary bonding, NSF AWWA certification required <br /> for their chemicals. <br /> POTENTIAL OBJECTION: None <br /> INPUT FROM OTHER SOURCES: Water Management requested the chemicals and also wrote the <br /> bid specifications. They recommend approval of the bid. <br /> STAFF REFERENCE: Keith Alexander, Director of Water Management, 424-2763. Rob Shirley, <br /> Water Production Manager, 424-2866. Keith will be at the council meeting to answer any questions the <br /> council may have about this purchase. <br /> BUDGET: Water Management Fund <br />