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Limited Phase II Site Assessment Work Plan SWIFT ROOFING 1930 West Fremont Street, Stockton, California 1.0. INTRODUCTION At the request of Ms. Marge Comer, property owner.Advanced GeoEnvironmental, Inc. (AGE)has prepared this Limited Phase II Site Assessment Work Plan for the property located at 1930 West Fremont Street, Stockton, California(the site).The work is being performed as part of due diligence for a property transfer. The location of the site is illustrated on Figure 1, a plan of the site is illustrated on figure 2. This work plan was prepared as required by the San Joaquin County Environmental Health Department(E HD)for the procurement of soil boring permits and uses the Central Valley Regional Water Quality Control Board document Appendix A-Tri-RegionalBoard Staff Re commerrdcrtivns fclr Preliminary Investigation and Evaluation of Underground Tank Sites as a guideline. 2.0. BACKGROUND The subject property was located in the southwestern portion of the City of Stockton. San Joaquin County,on the south side of West Fremont Street west from the intersection of West Fremont Street and San Juan Avenue and immediately south of Interstate 5. Figure I shows the setting of the subject property (7.5 Minute United States Geological Survey (USGS) Topographic Series, Stockton West Quadrangle, California) at an elevation of approximately 7 feet above mean sea level (MSL) and in an area of low topographic relief: The regional slope of the area is relatively gentle and dips toward the south. 2.1. REGIONAL GEOLOGIC/HYDROGEOLOGIC SETTING The site is situated within the southern portion of the Great Valley Geomorphic Province of California, a large, elongate, northwest trending, asymmetric structural trough, the northern and southern portions of the Province have been designated the Sacramento and San Joaquin Valleys. respectively. The Province is bordered by the Coast Ranges to the west,the Klamath Mountains and Cascade Range to the north, and the Sierra Nevada to the east. The Great Valley has been-filled with sediments derived from both marine and continental sources. Thickness of the sedimentary fill ranges from thin veneers along the valley edges to more than 20,000 feet in the south central portion of the valley. The sedimentary formations range in age from Jurassic to Recent,with the older deposits being primarily marine in origin and the younger deposits being primarily continental. Continental-derived sediments were primarily deposited in lacustrine, fluvial,and alluvial environments with sediment sources being the mountain ranges surrounding the Advanced GeoEnvironmental,Inc.