SITE INFORMATION AND CORRESPONDENCE

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Site Background Information SWIFT ROOFING 1930 West Fremont Street, Stockton, California BACKGROUND The site is 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. The site is further located in Township 1 North, Range 6 East, Mount Diablo Base and Meridian (Stockton West Quadrangle, 7.5-Minute Series, 1968,photo revised 1987), in a topographically flat area at an elevation between 5 feet and 10 feet above mean sea level. The San Joaquin County Tax Assessor's Office lists the site's boundaries as Parcel 33 on Map 360 in Book 133 (APN 133-360-33). The site has been utilized as an office/storage area since 2007.The property currently consists of two small offices at the northwest corner and one long storage/office building. The property is bound by buildings along the east,west and south boundaries. The property is further bound by iron fencing with gates along West Fremont Street. REGIONAL GEOLOGIC/HYDROGEOLOGIC CONDITIONS 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 valley(Olmsted and Davis, 1961).The site itself is located on unconsolidated and semi-consolidated alluvium, lake, playa and terrace deposits of Quaternary age (California Division of Mines and Geology, 1977).Rocks composing the basement complex of the Province have not been completely defined but are believed to be metamorphic and igneous in origin. The Modesto, Riverbank and Turlock Lake Formations and overlying recent alluvium are the principal source of domestic ground water in the 13,500-square-mile San Joaquin Valley Ground Water Basin (Basin 5-22). This basin is drained primarily by the San Joaquin River. The nearest surface water feature in the vicinity of the site is the Stockton Deep Water Channel, approximately I/a-mile toward the south. Advanced GcoE nvi ronmental,Inc.