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r.1 <br />, <br />BOOK j.� FdGE 64G - <br />SUBJECT: SOUTH COUNTY WATER TREATMENT PLANT <br />MEMBRANE PROCESS OPTIMIZATION AND SYSTEM <br />IMPROVEMENTS/CAMP, DRESSER & MCKEE WORK <br />AUTHORIZATION #10 <br />BACKGRO <br />Indian River County currently operates two (2) water treatment facilities; the North <br />County and South County WTP's. The North County facility has been in operation since <br />June 1998 utilizing nanofiltration (low-pressure) membranes. These membranes are part <br />of the Reverse Osmosis water treatment process. The South County facility operates <br />using older technology high-pressure membranes. Operation of these older membranes <br />require additional pumping/pressure and results in increased power consumption. Recent <br />technology and new membrane systems have emerged since the last replacement some <br />five (5) years ago. <br />Additionally, recent hurricane plan implementation and history has enabled County staff <br />to assess the South County facility for hurricane preparedness and operational system <br />improvements. County Utility staff has identified various improvements/enhancements <br />to benefit and/or strengthen the utility system, both operationally and in the event of a <br />hurricane. <br />At the present time, the Department of Utility Services has a continuing consultant <br />services contract for Water Treatment Plants with the engineering firm of Camp Dresser <br />& McKee Inc.,(CDM). The Indian River County Board of County Commissioners on <br />November 17, 1999 renewed this contract. <br />ANALYSIS <br />Camp Dresser & McKee, Inc. (CDM) performed an evaluation approximately six (6) <br />years ago to review the installed membrane process. Membrane replacement at that time <br />resulted in operational cost savings to the utility and directly benefited the customers of <br />the system. The membrane replacement capital costs were realized in a very short time. <br />Since the replacement five years ago, new technology and membrane systems have <br />become available. The Department of Utilities has funds restricted for membrane <br />replacement at both facilities. A present evaluation would enable the County to, again <br />optimize the existing process system and potentially lower operating costs. <br />Through direct assessment by the plant operations staff, system improvements and <br />hurricane preparedness enhancements have been identified. These improvements and <br />enhancements would strengthen the South County Facility operational reliability under <br />normal and extreme conditions, in addition to improving the operator friendliness of the <br />facility. Feasibility assessment and funding prioritization for these improvements and <br />enhancements will allow staff to facilitate the addition of these items in the most effective <br />and efficient manner. <br />December 7, 1999 <br />108 <br />