SITE INFORMATION AND CORRESPONDENCE

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�J Case Closure Summary Page 2 Leaking Underground Fuel Storage Tank Program 111 Release and Site Characterization Information (continued) Maximum Documented Contaminant Concentrations--Before and After Cleanup Contaminant Soil (ppm) Water (ppm) Contaminant Soil Before After Before After (ppm) Water (ppm) TPH(Gas) 50 c1 Before After Before After TPH(Diesel) 51 61 Ethylbenene <.03 <.005 Benzene Xylene .21 <.005 <.03 c005 Lead 7.3 140 Toluene <.03 <.005 MTBE NA <.005 HVO Method$010 <.03 Comments: All levels in ppm. Soil Before levels from Soil Sample collected on 6/4/98. Soil After levels are from Soil Sample collected at 12 feet below surface grade (bsg) on 9/20/01. Goundwater was not investigated due to low levels in soil at 12 feet bsg and groundwater at 50 bsg. No remediation was required. IV. 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 Plan? 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 decommissioned: NA Number Decommissioned: Number retained: List enforcement actions taken: NOR List enforcement actions rescinded: None V. Local Agency Representative Data Name: Margaret Lagorio Title: Supervising RENS Signature: Date: I D-�31 p VI. Central Valley Regi nal Water Qua Control Board (RB) Notification Date Submitted to RB: Response Date: RB Staff: Marty Hartzell Response: Title: Associate E22ineering Geologist VII. Additional Comments, Data, etc. This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official site file.