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Soil Suitability and Nitrate Loading Study JAIMES PROPERTY 10331 North State Route 99 Frontage Road, Stockton, California 1.0. INTRODUCTION AND PROPOSED DEVELOPMENT AdvancedGeo, Inc. (AGI) has prepared this Soil Suitability and Nitrate Loading Study (Study) for the property located at 10331 North State Route 99 Frontage Road (99 Frontage Rd), Stockton, California (site or subject property). The purpose of this Study is to determine the potential impact from nitrate loading and the suitability of the subsurface for an onsite wastewater treatment system (OWTS) due to the proposed development of a residence, and septic system at the site, and the future use of the property. The study was performed in accordance with the requirements of Section 9-1105.2(d) of the San Joaquin County Community Development Department. The scope Of work included a soil percolation test, review of published soil and groundwater information, local septic use and permit research, and estimated nitrate impact to soil and groundwater at the site. The site and surrounding area are illustrated in Figure 1. A site plan depicting structures, the locations of the percolation test hole, and the planned locations of the proposed residence and septic system are illustrated in Figure 2. 1.1. DESCRIPTION OF SITE The location of the site, surrounding properties and general setting is illustrated on the Lodi South topographic map (7.5 Minute United States Geological Survey (USGS) Topographic Series, California). The site is located in the southeast portion of Section 1, Township 2 North, Range 6 East, Mount Diablo Base and Meridian (Figure 1). The map shows the property located at an elevation of approximately 35 feet above mean sea level in an area of low topographic relief. The regional slope of the area is relatively gentle and dips toward the west-southwest. The property is located on the west side of 99 Frontage Rd, approximately 450 feet north of the intersection of Waller Road and 99 Frontage Rd and 2,500 feet south of Eight Mile Road, Stockton, California. The site consists of a 1.12-acre rectangular parcel identified as San Joaquin County Assessor Parcel Number (APN) 122-030-080. The property currently contains three small steel garage structures located in the eastern part of the site. The structures are currently not in use and the property is vacant; the current land use type is listed as vacant. Based on San Joaquin County Environmental Health Department (EHD) records and information provided by the property owner, an out of service domestic water well is also located on the property (Figure 2; Appendix A). 1.2. DESCRIPTION OF PROPOSED DEVELOPMENT The property is proposed to be developed with an approximately 2,021-square foot, three- bedroom residence and septic system in the western portion of the site. The septic system