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Soil Suitability/ Nitrate Loading Study Addendum Irerracon <br /> Arriaga Property Stockton, California <br /> August 31, 2020 Terracon Project No. NA207046 <br /> SOIL SUITABILITY / NITRATE LOADING STUDY ADDENDUM <br /> ARRIAGA PROPERTY <br /> APN 181-060-09 <br /> 10966 E. MARIPOSA ROAD <br /> STOCKTON, CALIFORNIA <br /> TERRACON PROJECT NUMBER: NA207046 <br /> Our office was contacted by Ms. Carla Arriaga to conduct a Soil Suitability/Nitrate Loading Study <br /> (SS/NLS)for the property at 10966 E. Mariposa Road, Stockton, California, San Joaquin County <br /> (SJC). The formatting of this report has been designed to follow, to the greatest degree possible, <br /> San Joaquin County, Environmental Health Department (EHD) Soil Suitability Study <br /> Requirements Checklist, dated September 25, 2007 and Nitrate Loading Study Requirements <br /> Checklist, dated July 14, 2003. <br /> 1.0 SOIL SUITABILITY STUDY <br /> 1.1 Introduction and Development <br /> The Soil Suitability Study (SSS) was conducted to determine whether site soils are suitable for <br /> septic system usage. The study was performed according to the requirements of Section 9- <br /> 110.05.2(d) of the San Joaquin County Development code. A major element of the field work <br /> included conducting percolation tests that meet absorption rates as specified by EHD. A review <br /> of published soil information, geologic maps, and groundwater information was also performed. <br /> 1.1.1 Site Description <br /> The site consists of an approximately 1.25-acre tract of partially developed land located at 10966 <br /> E. Mariposa Road, Stockton, California,San Joaquin County, California, Assessor Parcel Number <br />» (APN) 181-060-09. Based on client interviews,the site is improved with an existing approximately <br /> 1.246 square foot (SF) two bedroom residence, septic system and groundwater well. <br /> According to the San Joaquin County District Viewer the site is zoned limited agricultural (AL). <br /> Based on a review of the San Joaquin County Community Development Department the <br /> AL zoning designation is intended to "recognize and preserve areas that contain existing <br /> concentrations of small scale agricultural operations and dwellings." <br /> According to the United States Geological Survey (USGS) Stockton East California Quadrangle <br /> dated 1987, the elevation of the site is between approximately 50 and 55 feet above mean sea <br /> level with a topographic gradient generally sloping towards the west. <br />—� Responsive ■ Resourceful ■ Reliable 3 <br />