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Soil Suitability and Nitrate Loading Study AZEVEDO PROPERTY - ESCALON 16402 Escalon Bellota Road, Escalon, 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 16402 Escalon Bellota Road, Escalon, 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 modular home 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 shallow and deep soil percolation tests, groundwater sampling of the onsite domestic water well, 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 Escalon topographic map (7.5 Minute United States Geological Survey (USGS) Topographic Series, California). The site is located in the southwest portion of Section 28, Township 1 South, Range 9 East, Mount Diablo Base and Meridian (Figure 1). The map shows the property located at an elevation of approximately 120 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 Escalon Bellota Road, approximately 1,000 feet south of the intersection of Escalon Bellota Road and Magnolia Avenue, Escalon, California. The site consists of a 0.979 -acre parcel identified as San Joaquin County Assessor Parcel Number (APN) 229-080-280-000. The current land use type of the property is single-family residential, and the current zoning is Limited Agricultural (AL -10). The existing structures on the site include: an approximately 1,235 -square foot dwelling with garage; an approximately 1,000 -square foot shop building; and a domestic water well. The property is provided potable water from the existing domestic water well located in the western portion of the site, to the south of the existing residence (Appendix A, Figure 2). 1.2. DESCRIPTION OF PROPOSED DEVELOPMENT The proposed development will include the addition of an approximately 500 -square foot, two-bedroom modular home and a septic system. The proposed modular home and