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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Taf,.. ' ogram <br /> IIE 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) 6200 <6200 1.1 <.06 Xylene 130.0 030.0 .140 <.002 <br /> TPH (Diesel)( ) ND ND <.5 <S EthIbenzen <br /> y e 30.0 <br /> <30.0 .089 .0006 <br /> Benzene 0.72 F <0.72 .4 .0035 Oil S Grease NIA NIA NIA NIA <br /> Toluene 47.0 <47.0 .018 <,0005 Heavy Metals NIA NIA NIA NIA <br /> Mineral Spirits NIA NIA NIA NIA Lead 9.9 <9.9 .013 .013 <br /> MTBE LINK UNK UNK <.005 i <br /> Comments: 360 YD' OF SOIL REMOVED TO 12' BGS FOR DISPOSAL. 5 MWs INSTALLED AND GROUNDWATER <br /> GASOLINE CONCENTRATIONS DECLINED. ABOVE SOIL INFORMATION IS FROM A SOIL BORING (SVS) IN AREA <br /> OF T#1 (NORTHERN MOST TANK). <br /> 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: <br /> Should corrective action be reviewed if land use changes? YES <br /> Monitoring/Vapor wells decommissioned: NO Number Decommissioned: 0 Number retained: 5 <br /> List enforcement actions taken:. "NOR" SENT <br /> List enforcement actions rescinded: NONE ' <br /> V. Local Agency Representative Data <br /> ESigame.- MARGATE T-LAGORIO Title:SUPERVISING REHS-LOPISITE MITIGATION UNIT <br /> nature: Date: <br /> VI IC,eritral Valley Regional Water Quality Control Board (RB) Notification <br /> r <br /> Date Submitted to RB: Response Date: <br /> RB Staff PAT ANDERSON Response: <br /> Title: HYDROGEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> IE K GROUNDWATER SITE. <br /> LOW R!S <br /> I; This document and the related CASE CLOSURE LETTER,Shall be retained by the lead agency as part of the official <br /> i site file. <br /> i <br />{+{t <br /> F <br />