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Ocampo Property September 2013 <br /> 821 South Wilson Way, Stockton <br /> Claim No: 18916 <br /> ATTACHMENT 2: SUMMARY OF BASIC CASE INFORMATION (Conceptual Site Model) <br /> Site Location/History <br /> • This case is an active business and is bounded by a residence to the west, two railroad lines <br /> and businesses across East Taylor to the north, a business across South Wilson Way to the <br /> east, and a business to the south. <br /> • A Site map showing the location of the former UST, monitoring wells, and groundwater level <br /> contours is provided at the end of this review summary (AGE, 2013). <br /> • Nature of Contaminants of Concern: Petroleum hydrocarbons only. <br /> • Source: UST system. <br /> • Date reported: April 1988. <br /> • Status of Release: UST removed. <br /> Tank Information <br /> Tank No. Size in Contents Closed in Place/ Date <br /> Gallons Removed/Active <br /> 1 550 Gasoline Removed December 1985 <br /> Receptors <br /> • GW Basin: San Joaquin Valley— Eastern San Joaquin. <br /> • Beneficial Uses: Central Valley Regional Water Quality Control Board (Regional Water Board) <br /> Basin Plan lists agricultural supply, municipal, domestic supply, and potentially ilndustrial <br /> service and process supply. <br /> • Land Use Designation: Commercial. <br /> • Public Water System: Stockton East Water District and by the California Water Service. <br /> • Distance to Nearest Supply Well: According to data available in GeoTracker, there are no <br /> public supply wells regulated by the California Department of Public Health within 1,000 feet of <br /> the Site. No other water supply wells were identified within 1,000 feet of the Site in the files <br /> reviewed. <br /> • Distance to Nearest Surface Water: There is no identified surface water within 1,000 feet of the <br /> Site. <br /> Geology/Hydrogeology <br /> • Stratigraphy: The Site is underlain by interbedded and intermixed sand, silt, and clay. <br /> • Maximum Sample Depth: 95 feet below ground surface (bgs). <br /> • Minimum Groundwater Depth: 31.89 feet bgs at monitoring well MW-4. <br /> • Maximum Groundwater Depth: 44.71 feet bgs at monitoring well MW-2. <br /> • Current Average Depth to Groundwater: Approximately 32 feet bgs. <br /> • Saturated Zones(s) Studied: Approximately 32-75 feet bgs. <br /> • Appropriate Screen Interval: Submerged. <br /> • Groundwater Flow Direction: Northeast with an average gradient of 0.002 feet/foot <br /> (January 2013). <br /> Page 6 of 10 <br />