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Soil Suitability and Nitrate Loading Study DEWALT PROPERTY 4504 Virgil Street, Stockton, California 95215 1.0. INTRODUCTION AND PROPOSED DEVELOPMENT AdvancedGeo, Inc. (AGI) has prepared this Soil Suitability and Nitrate Loading Study (Study) for the property located at 4504 Virgil Street, 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 (SJCCDD). 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 percolation test hole location, 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 Waterloo topographic map (7.5 Minute United States Geological Survey (USGS) Topographic Series, California). The site is located in the western portion of Section 20, Township 2 North, Range 7 East, Mount Diablo Base and Meridian (Figure 1). The map shows the property located at an elevation of approximately 35 to 40 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 east side of Virgil Street approximately 600 feet north of the intersection of Virgil Street and Cherokee Road. The site consists of a 0.172 -acre parcel identified as San Joaquin County Assessor Parcel Number (APN) 087-122-090. The current land use type of the property is vacant, and the current zoning is listed as residential. The property is currently a vacant lot that is used as miscellaneous storage (Appendix A; Figure 2). 1.2. DESCRIPTION OF PROPOSED DEVELOPMENT The proposed development will include the addition of an approximately 1,200 square foot, three-bedroom home with a septic system and a domestic well. The proposed septic system will be located in the eastern portion of the property, to the east of the proposed home and will be connected to the new residence. The planned locations of the residence