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Surface and Subsurface Contamination Report—APN: 157-243-18—To create hve(5)lot size parcels of about equal size,each containing at least 7,680 sq.ft., out of a larger 38,531 sq. ft. parcel. 4.0 Soil Character: The University of California publication entitled"Soils of San Joaquin County,California",by Walter W. Weir, dated June 1952, identifies the soil on the subject property to be Stockton Adobe Clay. Stockton Adobe Clav Stockton series soils are composed of dark gray, heavily textured alluvial deposits occupying basin positions. They are strongly developed, hardpan soils derived from mixed, but predominately basic igneous material. The surface soils are about natural, but lime is usually found as the cementing agency in the hardpan layer. The surface soil, which may extend to a depth of 30" or more, is a dark gray, heavily textured clay, with distinct adobe structure when dry. The pH in the immediate surface is about 6.4,but increases to 7.8 with additional depth. The moisture equivalent is 40.61 percent. The upper subsurface contains some lime, but is otherwise very similar to the surface. At depths from 20 to 40 inches (normally over 30 inches) the soil rests abruptly on a light grayish-brown substratum capped with a thin layer of lime-cemented hardpan. The soil occupies near flat basin topography. Drainage is slow, due to both position and the heavy texture of the soil. Erosion is negligible and alkali is present in some areas. This soil is used largely for grain and irrigated pasture. Alfalfa and irrigated crops are only moderately successful in this area. When free from alkali,the adobe clay is rated 28 percent. The University of California publication entitled "Soils of San Joaquin County, California,United States Department of Agricultural Soil Conservation Service", issued October 1992, lists Jacktone—Urban Land Complex as the soil that is be encountered on the subject property. Jacktone—Urban Land Complex The Jacktone—Urban Land Complex soils occupy basin positions. The surface layer is a dark gray clay about 22 inches thick. The upper 12 inches of the subsoil is dark gray clay and light gray clay loam. The next 3 inches is a light gray, strongly cemented to indurated hardpan. The next 9 inches is yellowish brown loam. The lower part to a depth of 60 inches is yellowish brown, weakly cemented hardpan. In some areas the surface layer is silty clay or silty clay loam US Properties Inc., Stan Nixon,Agent, Stockton,California 95215(Owner)4408 East Fremont Street (Amir .t gitrl 599 gnnth Hinurlw AVPnnp gtndrtnn Califnmin 9571 S r,