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Comfort Air • October 2013 <br /> 1607 Turnpike Road, Stockton <br /> Claim No: 15533 <br /> ATTACHMENT 2: SUMMARY OF BASIC CASE INFORMATION (Conceptual Site Model) <br /> Site Location/History <br /> • The Site is an active sal s business with warehouse and is bounded by residences across <br /> French Camp Road on t e southeast and businesses to the west and north. <br /> • Site maps showing the location of the former USTs, monitoring wells, and groundwater level <br /> contours are provided ai the end of this review summary ([AGE, 2013). <br /> • Nature of Contaminants of Concern: Petroleum hydrocarbons only. <br /> • Source: UST system. <br /> • Date reported: Februan 1989. <br /> • Status of Release: LIST 3 removed. <br /> Tank Information <br /> Tank No. 1 Ilons Contents Closed in Place/ Date <br /> Removed/Active <br /> 1 550 Gasoline Removed IJanuaa 1989 <br /> Receptors <br /> • GW Basin: San Joaquir Valley— Eastern San Joaquin. <br /> • Beneficial Uses: Centre Valley Regional Water Quality Control Board (Regional Water Board) <br /> Basin Plan lists agriculft ral, municipal, domestic, industrial service and process supply. <br /> • Land Use Designation: erial photograph available on GeoTracker indicates mixed residential <br /> and commercial land us in the vicinity of the Site. <br /> • Public Water System: r,tockton East Water District and the California Water Service - <br /> Stockton. <br /> • Distance to Nearest Su ply Well: According to data available in GeoTracker, there are no <br /> public supply wells regu ated by the California Department of Public Health within 1,000 feet of <br /> the defined plume bouni lary. One domestic well is located 820�feet northeast (crossgradient) <br /> of the Site. No other we ter supply wells were identified within 1,000 feet of the defined plume <br /> boundary in the files rev ewed. <br /> • Distance to Nearest Su ace Water: There is no identified surface water within 1,000 feet of the <br /> defined plume bounda . ' <br /> Geology/Hyd rogeology <br /> • Stratigraphy: The Site i undeSain by interbedded and intermixed sand, silt, and clay. <br /> • Maximum Sample Dept v 115feet below ground surface (bgs). - <br /> • Minimum Groundwater epth: 15.10 feet logs at monitoring well MW-11 B. <br /> • Maximum Groundwater Depth: 23.02 feet bgs at monitoring well MW-813. <br /> • Current Average Depth to Groundwater: Approximately17-feet bgs. ( (a <br /> • Saturated Zones(s) Stui lied: Approximately 15 - 118 feet bgs. <br /> • Appropriate Screen Interval: Yes. <br /> • Groundwater Flow Dire tion: Southeast with an average gradient of 0.003 feet/foot (December <br /> 2012). , <br /> I riEPrY�i u#-e- <br /> Page 6 of 13 <br />