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Harry's Auto Mart November 2013 <br /> _ 2662 North Wilson Way, Stockton <br /> Claim No: 15094 <br /> ATTACHMENT 2: SUMMARY OF BASIC CASE INFORMATION (Conceptual Site Model) <br /> Site Location/History <br /> • This case is an active auto maintenance business and is bounded by a commercial petroleum <br /> fueling facility across North Wilson Way to the northwest, businesses across North Sanguinetti <br /> Lane a residence to the southeast, and residences and a motel to the south. <br /> • A Site map showing the location of the former USTs, monitoring wells, and groundwater level <br /> contours is provided at the end of this review summary (Advanced GeoEnvironmental [AGE], <br /> 2013). <br /> • Nature of Contaminants of Concern: Petroleum hydrocarbons only. <br /> • Source: UST system. <br /> • Date reported: March 1997. <br /> •. Status of Release: USTs removed. <br /> Tank Information <br /> Tank No. Size in Gallons Contents Closed in Place/ Date <br /> Removed/Active <br /> 1 550 Gasoline Removed Aril 1989 <br /> 2 2,000 Gasoline Removed April 1989 <br /> 3 550 1 Gasoline Removed Aril 1989 <br /> 4 300 1 Gasoline Removed April 1989 <br /> Receptors <br /> • GW Basin: San Joaquin Valley— Eastern San Joaquin. <br /> • Beneficial Uses: Regional Water Board Basin Plan lists agricultural, municipal, domestic, <br /> industrial service, and process supply. <br /> • Land Use Designation: Commercial. <br /> • Public Water System: Stockton East Water District and/or 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 250 feet of <br /> the defined plume boundary. The nearest well, well number 3901122=001, an inactive well for <br /> the Frontier Motel, is 201 feet west northwest (crossgradient) from the Site. No other water <br /> supply wells were identified within 1,000 feet of the defined plume boundary in the files <br /> reviewed. <br /> • Distance to Nearest Surface Water: There is no identified surface water within 1,000 feet of the <br /> defined plume boundary. <br /> Geology/Hydrogeology <br /> • Stratigraphy: The Site is underlain by interbedded and intermixed sand, silt, and clay. <br /> • Maximum Sample Depth: 110 feet below ground surface (bgs). <br /> • Minimum Groundwater Depth: 40.81 feet bgs at monitoring well MW7. <br /> • Maximum Groundwater Depth: 63.51 feet bgs at monitoring well MW1 D. <br /> • Current Average Depth to Groundwater: Approximately 47 feet bgs. <br /> • Saturated Zones(s) Studied: Approximately 40 - 100 feet bgs. <br /> • Appropriate Screen Interval: Yes. <br /> • Groundwater Flow Direction: Variable, south at 0.001 feet per foot. <br /> Page 7 of 13 <br />