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A portion of Lot 3, SPERRY TRACT,filed for record October 2, 1906 in vol. 3 of Maps , page and Plats a 51, described as follows: Parcel Two, as shown on Parcel Map, filed for record August 1, 1973 in Book I of Parcel Maps, page 103.. GENERAL GEOGRAPHIC SETTING: The property is located at the north end of the city of Stockton, a short distance west of # West Lane and 1/2 mile north of Alpine.Ave. Highway 99 is about 2 miles to the east, and ' the Union Pacific RR main line is just to the west of the property. The area is zoned for industrial & light manufacturing use, with considerable undeveloped land. The nearest single family dwellings are west of the railroad tracks. PLATE I, a portion of a CSAR map, shows the location of the property in relation to other features. GEOLOGIC & GEOMORPHIC PROVINCE: The property is located near the southern terminus of the Sacramento Valley, which is the northern end of what is referred to as,the Great Valley of California. It consists of in excess of 20,000 feet of sediments derived primarily from uplift and erosion of the Sierra Nevada Batholith to the east. The area is fairly flat; surface drainage is to the west at about 5'/mile. The Calaveras river & Stockton Diverting Canal are about 1500' to the north, the river drains to the west/southwest, and the diverting canal goes southeast. Based upon USGS topographic maps, (PLATE II,) surface elevation at this location is approximately 20' msl datum. DEPTH TO GROUNDWATER: Based upon San Joaquin County Flood Control District maps, the water table was about 60' bgl during the fall 1997 sampling event. It was located at 46' bgl during the previous work mentioned above. SOILS PROFILE: i Based upon published maps, the soil in this area is classified as Landlow Clay. It is generally dark greenish-brown in color, fine textured, underlain by hardpan or hardpan- like material. The soils excavated during tank removal operations consisted primarily of very silty clay, sandy clay, and streaks of harder tan to light brown clay. PRIOR USE OF TANK: The tank was installed in 1975 for the purpose of fueling company vehicles. Annual tightness tests were performed up until tank removal;no leakage was detected during that time. 2