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Date: <br />To: <br />From: <br />Prepared By: <br />Regular Agenda Item <br />t 1 <br />INDIAN RIVER COUNTY, FLORIDA <br />DEPARTMENT OF UTILITY SERVICES <br />January 30, 2014 <br />Joseph A. Baird, County Administrator <br />Vincent Burke, P.E., Director of Utility Service <br />Arjuna Weragoda, P.E., Capital Projects Manager <br />Subject: Sewer Feasibility Study for the North Sebastian Area —Results <br />UCP 4101 <br />D ESCRIPTIONS AND CONDITIONS: <br />On August 20th, 2013 the Indian River County Board of County Commissioners (BCC) approved Work <br />O rder No. 6 with Masteller and Moler, Inc. to provide professional services to investigate the <br />feasibility of installing centralized sewer services in the North Sebastian area. The subject area was <br />selected due to its proximity to the Lagoon, depth to water table and the economic benefits to the <br />commercial properties. <br />EDUCATION/RESEARCH: <br />The Indian River Board of County Commissioners has made cleaning the Lagoon a focal point in their <br />agenda. With regards to helping the Lagoon the County has looked at various factors which may be <br />contributing to the elevated nutrient loads and on October 1st, 2013 the Board of County <br />Commissioners passed a strict landscape and fertilizer ordinance. <br />N umerous symposiums have also looked at the potential impacts to the Lagoon from existing septic <br />systems. Primarily, sewer systems help to ensure that wastewater that is discharged back into the <br />e nvironment is sanitary, safe and free of potentially harmful pollutants. The presentation on the <br />Nutrients and Water Quality in the Indian River Lagoon by Dr Brian Lapointe have indicated C,-) <br />approximately 1 -million KG of Nitrogen per year added to the Indian River Lagoon via septic <br />systems. These studies have confirmed that high levels of Aqueous 15 Nitrogen (515 N) in <br />groundwater and surface water are a result of human waste. A well designed and installed <br />centralized sewer system will prevent dissolved nutrients from entering the water table and <br />u ltimately help reduce the nutrient loading into the Lagoon. <br />ANALYSIS/ENGINEERING: <br />Masteller and Moler, Inc. evaluated three alternatives in the Sewer Feasibility study for the North <br />Sebastian Area. The three alternatives included the evaluation of a gravity system, vacuum system <br />and a low pressure system. Also, the low pressure system included the evaluation of the Septic <br />Tank Effluent Pumping (STEP) system. <br />The North Sebastian area evaluated in the subject study encompassed an area generally described <br />as having a western limit of US Highway 1, an eastern limit of the Indian River Lagoon a Northern <br />85 <br />