SITE INFORMATION AND CORRESPONDENCE

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Case Closure Summary Page 2 Leaking Underground Fuel Storage Tank�v4gram 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) 7.4 7.4 .190 <0.050 Xylene 0.56 0.56 0.012 <0.0005 TPH (Diesel) NIA NIA NIA NIA Ethylbenzene 0.053 0.053 0.0022 <0,0005 Benzene 0.0086 0.0086 0.0008 <0.0005 Oil&Grease NIA NIA NIA NIA Toluene 0.13 0.13 0.0059 <0.0005 Heavy Metals NIA NIA NIA NIA MTBE 14 17 <0.0005 <0.0005 Comments: UST AND PIPING REMOVED; LOW LEVELS OF TPH GASOLINE, BTEX, AND MTBE REMAIN IN SOIL UNDER DISPENCER#4. GROUNDWATER CURRENTLY ND FOR TPH-GAS, BTEX,AND MTBE. 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: Should corrective action be reviewed if land=use changes? (YES) Monitoring/Vapor wells decommissioned: (YES) Number Decommissioned: 3 Number retained: 0 List enforcement actions taken: LEVEL ONE; NOR SENT TO RP List enforcement actions rescinded: V. Local Agency Representative Data Name: DONNA N Title: DIRECTOR OF ENVIRONMENTAL HEALTH Signature: Date: �S 9 V . C ntral Valley Regional Water Quality Control Board (RB) Notification Date Submitted to RB: Response Date: RB Staff. PAT ANDERSON Response: Title: HYDROGEOLOGIST VII. Additional Comments, Data, etc. CURRENTLY SOIL ONLY. This document and the related CASE CLOSURE LETTER,Shall be retained by the lead agency as part of the official site file.