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i <br /> Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> III Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations --Before and After Cleanup <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH (Gas) 1200 <1 <.05 <.05 Xylene 7 .135 00003 <.0003 <br /> TPH (Diesel) 18,000 1550 <.05 NA Ethylbenzene 1.3 .045 <.0003 <.0003 <br /> Benzene <.160 <.003 <.0003 <.0003 Oil &Grease NA <br /> Toluene <.160 .027 <.0003 <.0003 Heavy Metals <.005 NA NA <br /> MTBE .310 0005 NA <br /> Comments: <br /> Soil Before Results are from a soil sample collected below the 12,000 gallon UST at the time of it's removal. Soil sample <br /> was from 12 feet below surface. Soil After Results are from MW 1 at 20 feet below surface. Water Before Results are from <br /> MW1 on 10122101. Water After Results are from MW1 on 6114104. No remediation was performed at the site. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the RegionaE Board Basin an. YES <br /> Does completed corrective action protect potential beneficial uses per the Regional Board Basin Plan?YES <br /> Does corrective action protect public health for current land use?YES <br /> Site management requirements:None <br /> Should corrective action be reviewed if land use changes?YES <br /> Monitoring/Vapor wells decommissioned:0 Number Decommissioned:0 Number retained:1 <br /> List enforcement actions taken: NOR SENT TO RP . <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Title: Supervising REHSISite Mitigation/LOP Unit IV <br /> Signature: Date: ( c{ 0(l <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: J. Barton Response: <br /> Title: Eng. Geologist <br /> VII, Additional Comments, Data, etc. <br /> 11 SOIL ONLY CASE. <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of.the official <br /> site file. <br />