SITE INFORMATION AND CORRESPONDENCE

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Case Closure Summary Page 2 Leaking Underground Fuel Storage Tank Program III Release and Site Characterization Information (continued) Maximum Documented Contaminant Concentrations - - Before and After Cleanup Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) Before After Before After Before After Before After TPH (Gas) <1.0 0.0 <0.050 Xylene <0.005 <0.005 <0.0006 TPH (Diesel) <10.0 <5.0 <0.050 Ethyibenzene <0.005 <0.005 <0.0005 Benzene <0.005 <0.005 <0.0005 Oil &Grease 14,000 <5.0 <1.0 Toluene <0.005 <0.005 <0.0005 MTBE <0.005 <0.005 <0.001 Comments: The soil before concentrations are from soil collected at the time of UST removal on 517104. The soil and water after concentrations are from samples collected from two borings that were completed on 8130108 in the area where the Underground Storage Tank was removed; one boring to 15 feet and one boring to 55 feet. 1V. Closure Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan?Yes Does completed corrective action protect potential beneficial uses per the Regional Board Basin Paan? Yes Does corrective action protect public health for current land use? Yes Site management requirements: None Should corrective action be reviewed if land use changes? Yes Monitoring/Vapor wells installed: 0 Number Decommissioned: 0 Number retained: 0 List enforcement actions taken: NOR sent to RP. List enforcement actions rescinded: NA V. Local Agency Representative Data E Margaret Lagorio Title: Program Coordinator re: Date: VI. Central Valley Regional Water Quality Control Board (RB) Notification Date Submitted to RB: Response Date: RB Staff: J. Barton Response: Title: Eng. Geologist VII. Additional Comments, Data, etc. This is a soil only case. This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official site file.