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Soil Suitability and Nitrate Loading Study <br />MILLS PROPERTY <br />1480 White Lane/6055 Garnica Court, Stockton, California 95215 <br />1.0. INTRODUCTION AND PROPOSED DEVELOPMENT <br />AdvancedGeo, Inc. (AGI) has prepared this Soil Suitability and Nitrate Loading Study <br />(Study) for the property located at 1480 White Lane/6055 Garnica Court, Stockton, <br />California (site or subject property). The purpose of this Study is to determine the potential <br />impact from nitrate loading and the suitability of the subsurface for an onsite wastewater <br />treatment system (OWTS) due to the proposed development of a residence and septic <br />system at the site, and the future use of the property. The study was performed in <br />accordance with the requirements of Section 9-1105.2(d) of the San Joaquin County <br />Community Development Department (SJCCDD). The scope of work included a soil <br />percolation test, groundwater sampling of the onsite domestic water well, review of <br />published soil and groundwater information, local septic use and permit research and <br />estimated nitrate impact to soil and groundwater at the site. The site and surrounding <br />area are illustrated in Figure 1. A site plan depicting structures, the percolation test hole <br />location, and the planned locations of the proposed residence and septic system are <br />illustrated in Figure 2. <br />1.1. DESCRIPTION OF SITE <br />The location of the site, surrounding properties and general setting is illustrated on the <br />Stockton East topographic map (7.5 Minute United States Geological Survey (USGS) <br />Topographic Series, California). The site is located in the southern portion of Section 28, <br />Township 2 North, Range 7 East, Mount Diablo Base and Meridian (Figure 1). <br />The map shows the property located at an elevation of approximately 35 to 40 feet above <br />mean sea level in an area of low topographic relief. The regional slope of the area is <br />relatively gentle and dips toward the west-southwest. The property is located at the <br />intersection of White Lane and Garnica Court. The site consists of a 1.522 -acre parcel <br />identified as San Joaquin County Assessor Parcel Number (APN) 101-280-010. The <br />current land use type of the property is single-family residential, and the current zoning is <br />listed as low density residential. The existing structures on the site include a 2,741 -square <br />foot, single story dwelling and a domestic water well. The property is provided potable <br />water from the existing domestic water well located in the southeast corner the site <br />(Appendix A; Figure 2). <br />1.2. DESCRIPTION OF PROPOSED DEVELOPMENT <br />The proposed development will include the addition of an approximately 1,500 square <br />foot, two-bedroom modular home and a septic system. The proposed septic system will <br />