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September 26,2003 <br /> NOA ENVIRONMENTAL PROJECT NUMBER: LE03-295 <br /> III. PHYSICAL SETTING <br /> Table I provides a summary of the physical setting of the site and vicinity. <br /> Table I : Physical Setting SummarX <br /> Topographic Map: U.S.Geological Survey,Vernalis,California,7.5 minute Series(topographic) <br /> quadrangle maps dated 1969. <br /> Topographic Map Portions of the east half of Section 5 and west half of section 4 in T.2S.,R.6E.: <br /> Location: Mount Diablo Baseline and Meridian. <br /> Topograpliy: Essentially flat <br /> General Location: North side of West Linne Road,approximately 1750 feet east of Interstate 5. <br /> Assessor's Parcel 239-210-06 and 239-210-07 <br /> Number: <br /> Address: 1801 and 1999 West Linne Road,Tracy,CA 95304 <br /> Surface Soil Types: 121--Capay clay,wet,0 to 2 percent slopes. <br /> 269--Vernalis clay loam,wet,0 to 2 percent slopes. <br /> Permeability: Permeability is slow in the Capay soil. <br /> Permeability is moderate in the Vernalis soil. <br /> Depth to Groundwater: Groundwater is assumed to flow to the northeast,following topography. <br /> Current Site Use: Farm land,fueling facility,hay and equipment storage. <br /> Past Site Use: Farm land,fueling facility,hay and equipment storage. <br /> Soil and Hydrogeologic Information <br /> 121--Capay clay, wet, 0 to 2 percent slopes. This very deep, moderately well <br /> drained, nearly level soil is in interfan basins. It formed in alluvium derived from <br /> mixed rock sources(USDA,p.38). <br /> Typically,the surface layer is grayish brown and dark grayish brown clay about 20 <br /> inches thick (USDA,p.38). <br /> Permeability is slow in the Capay soil (USDA, p.38). <br />