R2015-133 ACCEPTING THE BID AND AUTHORIZING A PURCHASE ORDER Water Treatment Chemicals

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Item Coversheet Page 1 of 2 � Purchasing DATE: 11/30/2015 MEMO: 15-10 TO: Honorable Mayor Moore-Wolfe and City Council FROM: Tim Gleason,City Manager Gregg Zientara,Financial Management Director Deborah M.Perry,Purchasing Supervisor SUBJECT: Bids for water treatment chemicals SUMMARY RECOMMENDATION: Staff recommends awarding contracts to the low bidders meeting specifications listed on Exhibit A for each of the water treatment chemicals for January 1,2016—December 31,2016. BACKGROUND: The following is a list of the chemicals and how they are used in the water purification process. Alum—to coagulate;clarifying agent Carbon—used for taste and odor control;control of atrazine and other compounds Carbon Dioxide—lowers the pH level Chlorine—primary disinfectant Hydrofluosilicic Acid—reduces tooth decay Lime—water softening agent Sodium Chloride—assists to remove nitrate from water Sodium Chlorite—disinfectant;used for taste and odor control Sodium Hexametaphosphate—used to counteract calcium hydroxide;prevents scaling;filter protection The City of Decatur uses a performance based evaluation for Powdered Activated Carbon(PAC). Potential bidders were requested to submit PAC samples to an independent testing firm(Engineering Performance Solutions of Gainesville,FL)to evaluate product performance. Three vendors submitted products for evaluation. Each product was evaluated and assigned a performance factor based on its ability to remove 60%of two of the most commonly occurring substances attributed to the unpleasant taste and odor characteristics of drinking water(2-Methylisoborneol [MIB]and Geosmin). Multiplying this performance factor by the bid price submitted by each PAC vendor provided the ability to compare equivalent removal costs. The PAC product Aqua Nuchar 136-R-15 from Westrock MWV,LLC,Ingevity was determined to be able to remove 60%of the MIB and Geosmin at the lowest cost. The low bidders meeting specifications have provided the City with the necessary bonding,NSF and AWWA certifications required for their chemicals. POTENTIAL OBJECTIONS: None INPUT FROM OTHER SOURCES: Water Management requested the chemicals and also wrote the bid specifications. They recommend approval of the bid. STAFF REFERENCE: Keith Alexander,Director of Water Management,424-2863.Don Giger,Water Production Operation Supervisor,424-2866.Keith will be at the council meeting to answer any questions the council may have about this purchase. BUDGET/'I'IME IMPLICATIONS: Water Operating Fund https://decatur.novusagenda.com/AgendaWeb/CoverSheet.aspx?ItemID=339 12/7/2015