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Existing and Proposed Septic Tank Usage <br /> Ift— <br /> Existing Septic System <br /> According to the Site Plan by Mike Smith Engineering (2013), one septic system (3. 0 <br /> currently exists on the Site to serve the residence. <br /> Proposed Septic System <br /> The Site Plan depicts a new septic system to serve the proposed winery. <br /> On-Site Septic Permit History <br /> The San Joaquin County Environmental Health Department septic permit files were <br /> searched for the Site addresses. One permit, dated August 2006, was identified; it <br /> depicts the addition of one 40-foot leach line and three 36-inch diameter by 25-foot 3) <br /> deep seepage pits to the existing residential system. This permit is included in <br /> Appendix 4 of this report. <br /> Existing Septic Tank Usage in the Vicinity <br /> To estimate the septic system usage in the area, our office counted septic systems that <br /> exist within approximately one square mile surrounding the property. Air photo imagery <br /> from GoogleEarthT"' was used. Each building cluster on the photo was assumed to <br /> have one septic system. Using this method, it is estimated that at least 23 septic <br /> systems per square mile are located in the immediate vicinity of the Site. <br /> The general area consists of vineyards, grazing land, and rural residences. A poultry <br /> farm is located to the immediate south of the Site, and a producer of milled agricultural <br /> shell products is located to the immediate southeast. <br /> Septic Permit History in the Vicinity <br /> Based on a recent review of septic permits on file at the San Joaquin County <br /> Environmental Health Department for nearby properties, most septic systems in the �3 ��3.L� <br /> area appear to utilize leach lines and seepage pits. One permit indicates a system with <br /> leach lines and "ponds." The septic permits can be found in Appendix 4 of this report. <br /> LOGE 1402 Page 2 <br />