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Proposed Septic System <br /> A new septic system will be constructed to serve the new house. <br /> On-Site Septic Permit History <br /> The San Joaquin County Environmental Health Department septic permit files were <br /> searched for the Site address. Two permits were identified: <br /> • September 1972 permit for new septic system at mobile home. The system <br /> utilized a 1,200-gallon septic tank, a 100-foot leach line, and a 2- by 10- by 10- <br /> foot deep sump. <br /> • April 2014 permit for destruction of two septic tanks. <br /> These permits are included in 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 Google Earth was used. Each building cluster on the photo was assumed to have <br /> one septic system. Using this method, it is estimated that at least 93 septic systems per <br /> square mile are located in the immediate vicinity of the Site. <br /> The area surrounding the Site consists of vineyards and rural residential lots. The town <br /> of Woodbridge (sewered) is located less than half a mile to the east. <br /> Septic Permit History in the Vicinity <br /> Based on a review of septic permits on file at the San Joaquin County Environmental <br /> Health Department for nearby properties, septic systems in the area use a variety of <br /> configurations: leach lines only, filter beds, and leach lines with seepage pits. The <br /> septic permits can be found in Appendix 4 of this report. <br /> Expected On-Site Maximum Septic Tank Usage <br /> Maximum expected usage on the Site would be from the proposed residence. Septic <br /> system design should be based on the San Joaquin County On-Site Wastewater <br /> Treatment Systems Standards (2017) or other engineering recommendations. <br /> LOGE 1936 Page 2 <br />