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Lopez Property March 2014 <br /> 1601 French Camp Turnpike, Stockton <br /> Claim No: 18245 <br /> ATTACHMENT 2: SUMMARY OF BASIC CASE INFORMATION (Conceptual Site Model) <br /> Site Location/History <br /> • This case is an active commercial business and is bounded by light industrial sites to the <br /> southwest, north, and northeast, and residences across French Camp Turnpike to the <br /> southeast. <br /> • Site maps showing the location of the former UST's. monitoring wells, groundwater level <br /> contours, and petroleum concentrations are provided at the end of this review summary <br /> (Advanced GeoEnvironmental, 2012). <br /> • Nature of Contaminants of Concern: Petroleum hydrocarbons only. <br /> • Source: UST system. <br /> • Date reported: September 2003. <br /> • Status of Release: UST removed. <br /> Tank Information <br /> Tank No. Size in Gallons Contents Closed in Place/ Date <br /> Removed/Active <br /> 1 1,000 Gasoline Removed October 1987 <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, municipal, domestic, industrial service and process supply. <br /> • Land Use Designation: Aerial photograph available on GeoTracker indicates mixed residential <br /> and commercial land use in the vicinity of the Site. <br /> • Public Water System: Stockton East Water District and 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 defined plume boundary. There is a domestic water supply well 820 feet north (upgradient) <br /> of the Site. <br /> • Distance to Nearest Surface Water: There is no identified surface water within 1,000 feet of the <br /> defined plume boundary. <br /> Geology/Hyd rogeology <br /> • Stratigraphy: The Site is underlain by interbedded and intermixed sand, silt, and clay. <br /> • Maximum Sample Depth: 120 feet below ground surface (bgs). <br /> • Minimum Groundwater Depth: 14.91 feet bgs at monitoring well MW-3. <br /> • Maximum Groundwater Depth: 22.60 feet bgs at monitoring well MW-2. <br /> • Current Average Depth to Groundwater: Approximately 16 feet bgs. <br /> • Saturated Zones(s) Studied: Approximately 15 - 120 feet bgs. <br /> • Appropriate Screen Interval: Yes. <br /> • Groundwater Flow Direction: Variable, south at approximately 0.003 feet per foot (December <br /> 2012). <br /> Page 6 of 13 <br />