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N ovember 2013 <br />MM # 1351 <br />SANITARY SEWER FEASIBILITY STUDY & REPORT <br />NORTH SEBASTIAN AREA <br />INTRODUCTION <br />Purpose and Background <br />The Indian River County Utilities Department has requested and authorized Masteller & Moler, Inc. <br />to prepare a Sanitary Sewer Feasibility Study and Report addressing the North Sebastian area of <br />Indian River County. The area in question is presently served by an arterial sanitary sewer <br />collection and conveyance system constructed in the early 1990's but there remains a Targe <br />population of residential and commercial entities which utilize onsite septic disposal systems. The <br />u se of septic disposal systems results in pollution of the groundwater in the study area, which <br />u ltimately flows into the Indian River Lagoon and St. Sebastian River. Numerous articles have <br />documented that septic disposal systems are polluting the Indian River Lagoon. Several of these <br />articles are included in the Appendix of this report. In addition, the use of septic disposal systems <br />limits commercial development which in turn hinders business and employment growth in the area. <br />The purpose of this Feasibility Study and Report is to provide the preliminary design for <br />construction of a centralized sanitary sewer collection and conveyance system to eliminate the <br />existing and future need for septic disposal systems and establish the estimated cost of the <br />proposed centralized sewer system. <br />Location of Study Area <br />The study area consists of two (2) separate segments which will be referred to in this report as <br />'Study Area #1" and "Study Area #2." <br />Study Area #1 is bordered by US Highway 1 as the western boundary, the Indian River Lagoon as <br />the eastern boundary, Main Street as the southern boundary, and the Indian River Drive <br />connection to US Highway 1 as the northern boundary. <br />Study Area #2 includes the community of Ercildoune Heights and approximately 100 acres north of <br />Roseland Road with Kelso Place as the eastern boundary, 128`h Court as the western boundary, <br />and the shoreline of the St. Sebastian River as the northern boundary. <br />Existing Physical Considerations <br />Study Area #1 is presently served by an existing sanitary sewer arterial system located in Indian <br />River Drive, which borders the Indian River Lagoon. The sewer system was constructed in the <br />early 1990's and resulted in the elimination of numerous package treatment plants that had <br />1 <br />