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w <br /> Case Closure Summary Pam <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) ND NA NO ND Xylene NO ND NO NO <br /> TPH (Diesel) ND 54 NO ND Ethylbenzene NO NO ND NO <br /> Benzene ND ND NO ND Oil &Grease 12,000 160 16.2 NO <br /> Toluene ND .015 NO NO Heavy Metals NO ND NA NA <br /> MTBE NA NA NA .0007 <br /> Comments: Soil before results from sample beneath LIST#3 at time of removal, 09122189, soil after results from MW-5 at <br /> 20feet bsg. Water before results from MW-1 06125192, water after results from MW-1 09108198. Over-excavation of soil in <br /> UST#3 area on 01/25190, and UST#4 area on 04123-28193. <br /> I[- I <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan?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: 5 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: MARGARET LAGORIO, REHS Title: SUPERVISOR, SITE MITIGATION UNIT <br /> Signature: -� Date: to �� q <br /> Vl. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: MIKE SMITH Response: <br /> Title: ENVIRONMENTAL SPECIALIST II <br /> VII. Additional Comments, Data, etc. <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 />