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k' ■ KLEINIFELDER <br /> TABLE 3 <br /> REGIONAL GEOLOGY AND HYDROGEOLOGY <br /> REGIONAL The site is in the western part of the Great Valley Geomorphic Province of <br /> GEOMORPHIC California. The valley is 400 miles long, 50 miles wide, and comprises <br /> PROVINCE approximately 20,000 square miles. The valley has been filled with a thick <br /> sequence of marine and nonmarine sediments from the late Jurassic to <br /> Holocene. The uppermost strata of the Great Valley represents, for the <br /> most part, the alluvial, flood, and delta plains of two major rivers <br /> (Sacramento and San Joaquin Rivers) and their tributaries. <br /> The valley deposits are derived from the Coast Ranges to the west and the <br /> Sierra Nevada to the east. Granitic and metamorphic rocks outcrop along <br /> the eastern and southeastern flanks of the valley. Marine sedimentary <br /> rocks outcrop along most of the western, southwestern, southern, and <br /> southeastern flanks; and volcanic rocks and deposits outcrop along the <br /> northeastern flanks of the valley. The valley geomorphology includes <br /> dissected uplands, low alluvial plains and fans, river flood plains and <br /> channels. and overflow lands and lake bottoms. <br /> The site is located in the central portion of the Great Valley in an area <br /> characterized by alluvial fan deposits. The majority of the native <br /> sediments include a heterogeneous mix of poorly sorted clay. silt, sand. <br /> and _,ravel. Some beds of claystone, siltstone. sandstone, and <br /> conglomerate can also be present. <br /> DEPTH TO Accordin,, to the State of California Department of Water Resources. San <br /> REGIONAL Joaquin District Map entitled, "Lines of Equal Elevation of Water in <br /> GROUNDWATER \\'ells: I unconfined Aquifer, San Joaquin Valley, Spring 1998", the general <br /> AND DIRECTION direction of ��roundwater flow in the area of the site is to the southwest. <br /> OF ANTICIPATED Based cin the Lroundwater elevation of-40 feet below mean sea level and a <br /> FLOW site elevation 95 feet above mean sea level; regional depth to groundwater <br /> \vas 135 beet below grade in Spring 1998. Groundwater flow, depth and <br /> direction may be influenced by local pumping, rainfall, or irrigation <br /> patterns. Evaluation of such factors is beyond the scope of this assessment. <br /> l <br /> 20-4354-01.1'01/2017R 761 I',-l(-,e 6 or20 <br /> Copyright 1999 Kleinfelder. Inc, September 7. 1999 <br />