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February 24,2020 BGG Job No. G123.02 SITE DESCRIPTION The subject 47-acre site is identified as Assessor's Parcel Number (APN) 205-08-004. The San Joaquin County planning department application number for the project is PA-1900083.The Site is located at 20679 East Highway 120 in Escalon, California. The site currently contains a residence, several agricultural buildings, and an active farming operation. The central, approximately 40-acre portion of the site is planted with mature almond trees. The southwestern, 2-acre portion of the site was recently cleared of orchard trees and is currently used for fruit and vegetable farming to support the produce stand operating at the site. A residence,a barn,several small agricultural buildings,and a gravel-covered parking area are located in the southern middle portion of the site,adjacent to Highway 120. The southeastern corner of the site is vacant.The relatively flat site has elevations between about 89 to 91 feet above mean sea level (MSL), according to Google Earth mapping. According to the San Joaquin County Community Development Department,the subject property is zoned AG, general agriculture. EXISTING AND PROPOSED SEPTIC SYSTEM USAGE Existing Septic System Two septic systems are currently located at the site. A 1,200-gallon septic tank for the existing private residence is located east of the residence and will remain in use for that purpose. An 800- gallon septic tank is located on the south side of the existing barn, which will be demolished and removed from use. Proposed Septic System A new 2,500-gallon septic system is proposed to serve the new winery facility. On-Site Septic Permit History The San Joaquin County Environmental Health Department septic permit files were searched for the Site address. No permits were identified. Existing Septic Tank Usage in the Vicinity To estimate the septic system usage in the area,we used professional judgement to identify potential septic systems that exist within approximately one square mile surrounding the project site. Google Earth imagery was utilized. Each building cluster on the photo was assumed to have one septic system,and sites perceived to be used for commercial or industrial purposes were assumed to have two septic systems. Using this method,it is estimated that approximately 25 to 35 septic systems per square mile are located in the immediate vicinity of the Site. The general site area primarily consists of orchards and row crop agricultural land with several ranch residences. Septic Permit History in the Vicinity A review of septic permits on file at the San Joaquin County Environmental Health Department for nearby properties indicated that most septic systems in the area utilize leach lines. BAEZ GEOTECHNICAL GROUP Soil Suitability Study and Nitrate Loading Study-Zinc House Winery Page 2