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Case Closure Summary Pag fk- <br /> aking Underground f=uel Storage Tank Pam FILE C U I <br /> III Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup <br /> Contaminant Soli (qpm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before Atter Before After Before After Before After <br /> TPH(Gas) <.05 1,800 NT Xxxxxx Chromium 14.08 NT NT xxxxxx <br /> TPH(Diesel) 6,400 3,800 NT xxxxxx Cadmium 1.4 NT NT xxxxxx <br /> Benzene <0.3 <0.3 NT xxxxxx Nickle 67 NT NT xxxxxx <br /> Toluene .04 <0.3 NT xxxxxx MTBE NT <0.3 NT xxxxxx <br /> Ethylbenzene 3.3 1.0 NT xxxxxx PCB X0.25 NT NT xxxxxx <br /> Xylene 6.8 3.2 NT xxxxxx <br /> Motor Oil <1.0 2,300 NT xxxxxx <br /> Comments: Soil before sample results are from piping removal. Soil after results are from borings at 10 feet below surface <br /> grade. All soil sample results were ND below 10 feet bsg to 30 feet bsg. Groundwater was not encountered during <br /> investiciation. <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: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: MARGARET LAGORIO, RENS Title: SUPERVISOR, SITE MITIGATION UNIT <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board(RB)Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff. MARTY HARTZELL Response: <br /> Tile: ASSOCIATE ENGINEERING GEOLOGIST <br /> Vil. Additional Comments, Data, etc. <br /> Shallow"soil only"contamination. No Oxygenates evidenced in soil. <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 />