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July 31, 2023 BGG No. G130.09D SITE DESCRIPTION The subject 1.87-acre site is identified as Assessor's Parcel Number(APN)245-38-026. The site is located on the west side of South Carrolton Road, approximately 600-feet south of Yosemite Avenue/California Highway 120, in Ripon, California. Almond trees formerly occupied the proposed residence site which were removed between 2020 and 2022. The proposed building site is currently vacant and undeveloped. The relatively flat site has surface elevations of about 90 feet above mean sea level (MSL), according to Google Earth mapping. According to the San Joaquin County Community Development departing, the subject property is zoned AG-40, General Agriculture, 40-acres. EXISTING AND PROPOSED SEPTIC SYSTEM USAGE Existing Septic System There are currently no septic systems located at the site. Proposed Septic System A new 2,000-gallon septic tank is proposed for the new residence,which will be located west of the residence. On-Site Septic Permit History The San Joaquin County Environmental Health Department septic permit files were searched for the Site address. No septic system records or permit files were located; hence, it appears no septic systems are present or have been constructed at the site. Existing Septic Tank Usage in the Vicinity The immediate area surrounding the subject site consists primarily of agricultural properties of more than 40-acres with single-family residences,and some ranchette properties of approximately 2-acres with single-family residences. The immediate areas to the north,south,and west of the site and east of Carollton Road are predominantly in use for orchard tree agriculture, with one neighboring residence to the east and two residences to the south. To estimate the septic system usage in the area,we reviewed Google Earth imagery and used professional judgement to identify potential septic systems that exist within an approximately one square-mile area surrounding the project site. Each building cluster in the imagery 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. Sites within improved residential areas perceived to be connected to a municipal wastewater collection system were assumed to have no septic systems. Using this method,it is estimated that approximately 40 to 45 septic systems per square mile are located in the immediate vicinity of the site. Septic Permit History in the Vicinity A review of septic permits on file with the San Joaquin County Environmental Health Department for nearby properties indicated that most septic systems in the area utilize leach lines. Expected On-Site Maximum Septic Tank Usage Maximum expected usage for the proposed onsite septic system will be from the residents of the proposed residence. Septic system design should be based on the San Joaquin County On-Site Wastewater Treatment Systems Standards (2017) or other engineering recommendations. BAEZ GEOTECHNICAL GROUP Soil Suitability Study&Nitrate Loading Study-Becerra Residence,18163 S.Carrolton Road Page 2