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vaseuiosure SummaryPage2 i <br /> Leaking Underground Fuel Stora- , Tank Program - <br /> U i <br /> III. Release and Site Characterization Information (continued) <br /> i <br /> Maximum Documented Contaminant Concentrations -- Before and After Cleanup <br /> Contaminant Soil Before (ppm) Water (ppm) Contaminant Soil Before <br /> After Before After (Ppm) Water (ppm) ; <br /> After Before After <br /> TPH (Gas) 360 150 100' <.05 Xylenes 0.74 0.22 0.36 0006 <br /> TPH (Diesel) NA 1,700 NA; 0.99' Ethylbenzene 0.25 0.15 0.11 <.0005 <br /> Benzene 0.077 0.13 0.072 <.0005 Oil&Grease NA NA NA NA <br /> Toluene 0.18 0.10 0.099 <.0005 Heavy Metals 9.8 NA NA NA <br /> MTBE NA <.05 NA 0.31 <br /> Comments: SOIL AND WATER 'BEFORE' DATA FROM THE TANK PULL SAMPLE ANALYSES. SOIL 'AFTER'•DATA <br /> FROM SOIL BORINGS. WATER 'AFTER' DATA FROM 6128103 QMS. THE MTBE 0.31 ppm RESULT IS FROM THE 1 <br /> FURTHEST OFFSITE, CROSS-GRADIENT WELL THAT IS DOWN GRADIENT FROM 7-ELEVEN SITE AT 2360 <br /> GRANTLINE THAT HAS AN MTBE PLUME. _--NO ACTIVE REMEDIATION WAS PERFORMED AT THIS SITE--- <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: 8 <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 List enforcement actions rescinded: NONE - 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: --Y.rt Date: 3 (� <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: JAMES L.L. BARTON Response: <br /> Title: ENGINEERING GEOLOGIST <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 />