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DATE: JULY 20.2000 <br />TO: JAMES E. CHANDLER COUNTY ADMINISTRATOR <br />THRU: DONALD R. HUBBS, P:E <br />DIRECTOR OF UTILITY k S <br />PREPARED & GENE A. RAUTH <br />STAFFED BY: OPERATIONS MANAGER <br />SUBJECT: REPLACEMENT\UPGRADE OF CHEMICAL FEED <br />PUMPS; SOUTH COUNTY REVERSE OSMOSIS <br />WATER TREATMENT PLANT <br />BACKGROUND: <br />The South County Water Treatment Plant has been producing potable water for <br />approximately 18 years. In order to meet regulatory requirements, and provide safe <br />drinking water, the proper pH of water must be maintained during the treatment and <br />distribution process. The South County Reverse Osmosis Water Treatment Plant <br />currently has two mechanical feed systems, which are used for pH adjustment of the <br />drinking water by adding Sodium Hydroxide, and Sulfuric Acid. The mechanical feed <br />systems are each made up of bulk storage tanks, smaller day tanks, injection pumps, and <br />various piping. <br />ANALYSIS: <br />Each of the two chemical feed systems incorporates three chemical injection pumps; Q <br />Sulfuric Acid, and 3 Sodium Hydroxide). The current chemical feed pumps were <br />manufactured by Pulsafeeder\IDEX Corporation, and have been in service since 1981. <br />All six chemical feed pumps are in need of replacement. Staff has obtained a price quote <br />from the manufacturer's representative for replacement of the six pumps, in the amount <br />of 541,292.00. (See attached). As outlined in the attached documents, it is the Plant <br />Operator's desire to standardize plant equipment between the County's North and South <br />Reverse Osmosis Water Treatment Plants. Replacement and upgrading to the current <br />version of the Pulsafeeder — Model #7120H will allow for further integration of the <br />chemical feed system into the overall plant's computer automation system. <br />RECOMMENDATION: <br />The Staff of the Department of Utility Services recommends that the Board of County <br />Commissioners accept and approve the purchase of the six Pulsafeeder — Model #7120H <br />Chemical Feed Pumps, in the amount of $41,292.00. Funding will come from Account <br />No. 471-000-169-394.00. <br />GAR\jhd <br />Attachments <br />August 1, 2000 <br />92 <br />BI/ 114 PG 432 <br />