SITE INFORMATION AND CORRESPONDENCE FILE 2

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Fernando Place November 2013 1201 South Center Street, Stockton Claim No: 12186 ATTACHMENT 2: SUMMARY OF BASIC CASE INFORMATION (Conceptual Site Model) Site Location/History • This case is a residence and small engine repair business and is bounded by a business and residences across West Jackson Street to the north, an empty lot across South Center Street to the southeast, residences to the west, and a commercial property across French Camp Turnpike Road to the south. • Site maps showing the location of the former USTs, monitoring wells, groundwater level contours, and contaminant concentrations are provided at the end of this review summary (AGE, 2013). • Nature of Contaminants of Concern: Petroleum hydrocarbons only. • Source: UST system. • Date reported: November 1994. • Status of Release: USTs removed. Tank Information Tank No. Size in Contents Closed in Place/ Date Gallons Removed/Active 1,2 500 Gasoline Removed October 1994 3 8,500 Gasoline Removed October 1994 Receptors • GW Basin: San Joaquin Valley— Eastern San Joaquin. • Beneficial Uses: Central Valley Regional Water Quality Control Board (Regional Water Board) Basin Plan lists agricultural, municipal, domestic, and industrial service and process supply. • Land Use Designation: Aerial photograph available on GeoTracker indicates mixed residential and commercial land use in the vicinity of the Site. • Public Water System: Stockton East Water District and the California Water Service. • Distance to Nearest Supply Well: According to data available in GeoTracker, there are no public supply wells regulated by the California Department of Public Health within 250 feet of the Site. No other water supply wells were identified within 250 feet of the Site in the files reviewed. • Distance to Nearest Surface Water: There is no identified surface water within 250 feet of the Site. Geology/Hydrogeology • Stratigraphy: The Site is underlain by interbedded and intermixed sand, silt, and clay. • Maximum Sample Depth: 185 feet below ground surface (bgs). • Minimum Groundwater Depth: 15.93 feet bgs at monitoring well MW6A. • Maximum Groundwater Depth: 32.10 feet bgs at monitoring well MWSE. • Current Average Depth to Groundwater: Approximately 20 feet bgs. • Saturated Zones(s) Studied: Approximately 16-198 feet bgs. • Appropriate Screen Interval: Yes, submerged. • Groundwater Flow Direction: Variable, southeast, south with an average gradient of 0.0006 feet/foot in shallow groundwater (January 2013). Page 6 of 14