SITE INFORMATION AND CORRESPONDENCE

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i 4 Case Closure Summary Page 2 Leaking Underground Fuel Storage Tank Program Ill Release and Site Characterization Information (continued) Maximum Documented Contaminant Concentrations.--Before and After Cleanup m Contaminant Soil (ppm} Water (ppm) Contaminant Soil (ppm) Water (Ppm) Before After Before After Before After Before After TPH(Gas) 16 <5 Ethylbenene .22 <.002 TPH(Diesel) <3000 <10.1 Xylene 1.8 <.0039 Benzene <.05 <.002 Toluene <.05 <.002 MTBE NA <.01 Comments: All levels in ppm. Soil Before levels from soil below the UST in the NE corner of the excavation at 9 feet below surface grade at time of removal. Soil After levels are from soil boring 3 at 16 feet below surface grade on 6/14/00. Samples from all the other soil borings completed on 6/14/00 were non detect. No groundwater samples were collected. 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decommissioned: NA Number Decommissioned: Number retained: List enforcement actions taken: NOR List enforcement actions rescinded: None V. Local Agency Representative Data Name: Margaret Lagorio Title: Supervising REHS Signature: Date: VI. Central Valley Regional Water Quality Control,Board(RB) Notification Date Submitted to RB: Response Date: RB Staff: Marty Hartzell Response: Title: Associate Engineering 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.