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Existing and Proposed Septic Tank Usage <br /> Existing Septic System SS <br /> One septic system currently exists on the Site to serve the residence. <br /> C.2 ,,� Proposed Septic System <br /> According to Mr. Gash, the new winery building will utilize a new septic system to serve <br /> a small restroom. <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 /> • June 1971 permit for new septic system at residence. The system utilizes a <br /> 1,600-gallon septic tank and three 80-foot leach lines. <br /> • May 2004 permit for addition of 40-foot infiltrator leach line and three-foot /3 .3> <br /> diameter by 25-foot deep seepage pit to existing residential septic system. l <br /> The septic permits are included in Appendix 4 of this report. Based on the illustrations <br /> included, it appears that one or both permits may refer to the adjacent house to the <br /> north. <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 GoogleEarthTm was used. Each building cluster on the photo was assumed to <br /> have one septic system. Using this method, we estimated that at least 43 septic 6 4) <br /> systems per square mile are located in the immediate vicinity of the Site. <br /> The general area consists of vineyards and orchards with scattered rural residences. <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, the septic systems in the area <br /> appear to utilize leach lines and seepage pits. The septic permits can be found in l i <br /> Appendix 4 of this report. 3 <br /> LOGE 1301 Page 2 <br />