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Thc test borings and aquifer testing will assist in determining the most favorable location for a <br />well that will provide the necessary capacity for the surface water treatment plant. <br /> <br />ri'ho detailed Aquifer testing will further define the capacity of the aquifer at the selected <br />locz~tion through construction of a 12-inch test well. Monitoring wells will be constructed <br />m'ou~d this well to assess the impact of pumping on the aquifer. The well will be tested for <br />pro<it~ction capacity and the water will be analyzed for meeting the State drinking water <br />rcqt~ircments. <br /> <br />[ ltilization o£ surface water sources requires treatment to meet Federal and State Drinking water <br />stal~dar¢ls. Recent development of membrane technologies has significantly reduced the cost of <br />t~'cat~ncnt, thus reducing the cost of implementation of surface water sources. In order to <br />dctcrminc the most cost effective configuration of the membrane treatment system, membrane <br />Iiltration pilot testing will be conducted. A small membrane plant will be located on the site <br />ami thc water fi'om one of the test wells will be processed and tested. This small plant will <br />provide operational data for design of the actual treatment plant. Based on aquifer and <br />lncmbrane system testing, a Preliminary Design Report will be prepared. This report will <br />include preliminary designs and cost estimates for the water treatment facility and the water <br />supply and transmission main facilities <br /> <br />Tho pmjcctcd schedule for this work if approved is to construct the wells in January and <br />}:cbmary and run the Pilot Plant in March and April. The water has the highest concentration of <br />suspended solids and is coldest at this time of year. Cold water and suspended solids are the <br />somc: o f tiao most critical challenges for membrane plants. <br /> <br />proposed costs for this work are summarized below: <br /> <br />?,cvicw of Hydrogeological Data <br />Test Borings and Aquifer Testing (based on <br />two locations for test drilling) <br />l)ctail Aquifer Testing <br />Membrane Filtration Pilot Plant Testing and <br />Preliminary Design <br />Total Estimated Costs <br /> <br />$7,500 <br />$50,000 <br /> <br />$75,000 <br />$50,000 <br /> <br />$182,500 <br /> <br />costs listed are not-to-exceed amounts, and only the actual costs incurred will be billed. <br /> <br />'1 hc (iomprehensive Water Plan had a budget of $200,000 for this work. <br /> <br />Staff Reco~nmendation: <br /> <br />S tal'l' recommends approval of the overall contract with Bolton &Menk, Inc for the First Design <br />['hast of tho River Bank Water Supply Collection System and Water Treatment facility. <br /> <br /> <br />