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Existing and Proposed Septic Tank Usage <br />Existing Septic System <br />One septic system is currently located on the Site (Plate 2). <br />Proposed Septic System <br />Mr. Kumar plans to build a new septic system for the new residence. He indicated that <br />the existing septic system will be demolished (personal communication, April 24, 2019). <br />On-Site Septic Permit History <br />The San Joaquin County Environmental Health Department septic permit files were <br />searched for the Site address. The following three permits were identified: <br />April 1968 permit for replacement septic system for small shop. The system <br />utilized a 1,000-gallon septic tank and one 80-foot leach line. <br />May 1968 permit for addition to existing residential septic system. An 80-foot <br />leach line was added to the existing system. <br />March 1995 permit for repair to existing residential septic system. The system <br />utilized a 1,600-gallon septic tank and four 70-foot leach lines. <br />These permits have been 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 seven septic systems <br />per square mile are located in the immediate vicinity of the Site. <br />The vicinity of the Site is primarily agricultural; only a few scattered rural residences are <br />located within the surrounding mile. A dairy is located just over one-half mile to the <br />north of the Site. A large residential subdivision is located just over one-half mile to the <br />south. <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, most septic systems in the area utilize leach <br />lines only. The septic permits can be found in Appendix 4 of this report. <br />LOGE 1909 Page 2