ARCHIVED REPORTS LIMITED SOIL ASSESSMENT AND TEST PIT EXPLORATION

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n KLEINFELDER 2 SITE SETTING 2.1 SITE LOCATION The site is located in Township 2 North, Range 6 East, Extrapolated Section 25, Subsections B and G, Mount Diablo Baseline and Meridian according to the 1968 (Photorevised 1987) U.S. Geological Survey "Stockton West, California" 7.5-Minute Topographic Quadrangle Map. The property is located at an elevation of approximately 27 feet above mean sea level (msl). 2.2 CURRENT SITE USE AND VICINITY CHARACTERISTICS The site is located in an area of relatively level terrain. Land use on site includes a '/4 mile paved racetrack, bleachers, storage sheds, concession stands, restrooms, mobile home and dirt parking areas. Improvements include two domestic wells, power lines, access roads, approximately five dry wells, pad and pole-mounted transformers, utility vaults, and subsurface drains . Surrounding areas include automotive Cer shops ps (B side�t aB toythed north and D e custom supplies at 4238 N. Wilson Way) Department of Fish and Game at 4001 Wilson Way, agricultural land and communication tower to the south S o the east is Wholesale Cars to You (4099 N. Wilson Way), North American Au rvice and Mikes Paint and Body formerly Valley Auto Repair (4055 N. Wilson Way), Dentoni's Permatech Truck Accessories, and A.C. iTransmission (4035 N. Wilson Way) beyond which is N. Wilson Way. Orchards and agricultural land is located to the west. 2.3 REGIONAL-GEOLOGY The site lies near the western boundary of the Great Valley Geomorphic Province of California. The valley is approximately 400 miles long and averages about 50 miles wide, and comprises about 20,000 square miles. The valley has been filled with a thick sequence of marine and non-marine sediments from the late Jurassic to Holocene. The uppermost strata of the Great Vs II Sa eamento a�dthe San Joaqu n Rv ers)vand flood, their and delta plains of two major r tributaries. The valley deposits are derived from the Coast Ranges to the west and the Sierra Nevada to the east. Granitic and metamorphic rocks outcrop along the eastern and southeastern flanks of the valley. Marine sedimentary rocks outcrop along most of the Page 3 of 22 58671.E02/ST05R1127/DH:ly September 15, 2005 ©2005 Kleinfelder, Inc.