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The elevation of the Site, according to a United States Geological Survey topographic map, is approximately 128 to 133 feet above mean sea level. The Site is relatively flat (Plate 3). According to the San Joaquin County District Viewer (www.sjmap.org), the Site is zoned AG-40, General Agriculture with a minimum parcel size of 40 acres. This zoning designation "is established to preserve agricultural lands for the continuation of commercial agriculture enterprises." Previous Studies Chesney Consulting completed a Nitrate Loading Study Soil Suitability Study for the property in 2006 and an addendum to that report in 2012. Existing and Proposed Septic Tank Usage Existing Septic System One septic system is currently located on the Site to serve the existing house and winery (Plate 2). Proposed Septic System Mr. Violante indicated that the existing septic system was intentionally oversized when it was constructed; he does not believe any additions to the system will be required. On-Site Septic Permit History The San Joaquin County Environmental Health Department septic permit files were searched for the Site address. Three septic permits were identified: • December 2004 permit for addition to residential system. It appears that a new 1,600-gallon tank and a 100-foot leach line were added to the existing system. • April 2006 permit for commercial system (serves house as well). The system utilizes a 2,000-gallon septic tank and a 1,200-square foot filter bed. The permit notes that the previous residential system was "to be disconnected and remain for future if needed." • August 2007 permit for 2,000-gallon tank to collect winery process wastewater prior to land application. Attached to the permit is a letter from the California Regional Water Quality Control Board discussing land application of winery wastewater. These permits have been included in Appendix 4 of this report. LOGE 20-19 Page 2