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2.0 SITE DESCRIPTION <br /> This section provides a brief description of the Site history and setting, includ ng the geology and <br /> hydrogeology. <br /> 2.1 Site Setting <br /> The site is located on a 61-acre property on the southwest corner of the intersection of North West Lane <br /> and East Alpine Avenue(Plate 1.1). The northern portion of the site is currer tly utilized as a cabinet <br /> manufacturing facility. The southern portion of the site is currently vacant,bi it was historically utilized as <br /> fruit box manufacturing facility. A site map illustrating structures on the prol erty is included as Plate 1.2. <br /> The site has low topographic relief,sloping gently toward the west to southw st,an elevation between 15 <br /> and 20 feet above sea level(Advanced GeoEnvironmental,Inc.[AGE], 2002 . <br /> The site is situated within the Great Valley Geomorphic Province of Califom a,a large elongate, <br /> northwest trending,asymmetric structural trough. The northern and southern portions of the Province <br /> have been designated the Sacramento and San Joaquin Valleys,respectively. The Province is bordered by <br /> the Coast Ranges to the west,the Klamath Mountains and Cascade Range to he north,and the Sierra <br /> Nevada to the east(AGE, 2004). <br /> The Great Valley has been filled with sediments derived from both marine a d continental sources. <br /> Thickness of the sedimentary fill ranges from thin veneers along the valley edges to more than 20,000 feet <br /> in the south central portion of the valley. The sedimentary formations range m age from Jurassic to <br /> Recent. The older deposits are primarily marine in origin and the younger deposits are primarily <br /> continental. Continental-derived sediments were primarily deposited in lacu itrine,fluvial,and alluvial <br /> environments with sediment sources being the mountain ranges surrounding he valley(Olmsted and <br /> Davis, 1961). The Site is located on unconsolidated and semi-consolidated alluvium,lake,playa and <br /> terrace deposits of Quaternary age (California Division of Mines and Geolog v, 1981). Rocks comprising <br /> Draft <br /> KB61125 workplan-ESC MACTEC Engineering and Consulting, Inc. 6 <br /> September 28,2005 <br />