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1 Aj h'g KLEINFELDER .File No. 20-3937-01 September 3, 1996 2 SITE SETTING 2.1 SITE LOCATION The site is a 5.62 acre undeveloped lot located east of California State Highway 99 and north of Waterloo Road in Stockton, California. y h The site is .located in the El Rancho Del Campo De .Los Franceses Grant, Section 54 of Township 2 North, Range 7 East of the Mount Diablo Baseline and Meridian. According to the 1976 photorevised U.S. Geological Survey "Stockton, East" 7.5-Minute Topographic ` Quadrangle Map, the property has an elevation of approximately 25 feet above mean sea level. 2.2 CURRENT SITE USE AND VICINITY CHARACTERISTICS The project site is currently an undeveloped lot in a commercial / industrial area of Stockton. The site is bound to the north by the Stockton "Terminal and Eastern Railroad, to the south by t: Bobcat Central, Inc., to the west by an easement and l-lighway 99, and to the east by Shaw Road. 2.3 GEOLOGY AND HYDROGEOLOGY The site lies within the Great Valley Geomorphic Province of California. The valley is about 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 Valley represents, for the most part, the alluvial, flood, and delta plains of two major rivers (Sacramento and San Joaquin Rivers) and their 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 western, southwestern, southern, and southeastern flanks; and volcanic rocks and deposits outcrop along the northeastern flanks of the valley. The valley geomorphology includes dissected uplands, low alluvial plains and fans, river flood plains and channels, and overflow lands and lake bottoms. The majority of the native sediments near the site consist of Miocene to Holocene continental rocks and deposits of a heterogeneous mixture of generally poorly sorted clay, silt, sand and gravel. Some beds of claystone, siltstone, sandstone, and conglomerate are also present. 20-3937-OIIMR960189 - Page 4 of 18 01996, Kleinfelder. Inc.