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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 Before (ppm) Water (ppm) Contaminant Soil Before (ppm) Water (ppm) <br /> After Before After After Before After <br /> TPH (Gas) 39,000 54.0 14.0 Xylenes 3100 17.0 0.78 <br /> TPH (Diesel) NA NA NA Ethylbenzene 570 1.1 0.13 <br /> Benzene 660 0.84 <0.005 Oil & Grease 610 NA NA <br /> Toluene 2400 2.3 <0.005 MTBE 0.11 0.067 <0.005 <br /> 1,2 DCA NA .083 <0.005 <br /> Comments: SOIL'BEFORE' DATA TPHg & BTEX IS FROM S-6- PL1, 2110198. NO CONFIRMATION SAMPLES COLLECTED FOR <br /> SOIL'AFTER' DATA. OIL AND GREASE FROM UST REMOVAL STOCK PILE TAKEN 211998. WATER'BEFORE' DATA FROM VW- <br /> 5D ON 12/13/01; WATER 'AFTER' DATA FROM VW-5D ON 6128111. <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: YES Number Decommissioned: 20 Number retained: none <br /> List enforcement actions taken: Notice of Responsibility 5113188, 1124191, 1123106, 1124106, 6129/07, 5/7/08 <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> DONNA HERAN, RENS Title: DIRECTOR <br /> Signature: Date: 4 Ste— f2- <br /> e` LL�� � <br /> ! <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: September 26, 2011 Response Date: October 12, 2011 <br /> RB Staff: JAMES L.L. BARTON, PG Response: Concurrence <br /> Title: ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> E-- 1� <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file. <br />