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KI EINFEL1) FR 2 SITE SETTING ' 2.1 SITE LOCATION ' The site is located in Township 1 North, Range 6 East, in Tract E of Section 25, Mount Diablo Baseline and Meridian according to the 1968 (photorevised 1987) U S Geological Survey "Stockton West, California" 7 5-Minute Topographic Quadrangle Map Because the subject site ' lies within the part of the "Campo De Los Francis" Spanish land grant the section and tract locations were interpolated The property is located at an elevation of approximately 15 feet above mean sea level (rnsl) 2.2 CURRENT SITE USE AND VICINITY CHARACTERISTICS The project site is currently owned and occupied by H&H Engineering and Construction, Inc , and consists of an office and large yard area. The site is bordered to the north by Industrial Drive, to the south by a railroad spur and open grass fields, to the west by an open grass field, and to the east by Leatherback Industries The surrounding areas are mostly industrial and commercial intermixed with open grass fields 2.3 REGIONAL GEOLOGY iThe 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 Valley represent, 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 According to the California Division of Mines and Geology, San Jose Quadrangle Map No 1A, 1981, the subject site is underlain by the Pleistocene Modesto Formation 20-4439-01 E01/2000R726 Page 3 of 17 Copynght 2000 Kleinfelder, Inc October 16,2000