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Sww <br /> 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) 131 0.651 <0.050 Xylenes 9.7 0.011 <0.001 <br /> TPH (Diesel) 120 0.750 <0.050 Ethylbenzene NA 0.012 <0.0005 <br /> Benzene 0.13 0.025 <0.0005 Oil &Grease <20.0 NA NA <br /> Toluene 2.3 0.0005 <0.0005 Heavy Metals NA NA NA <br /> MTBE NA 0.011 0.0029 <br /> Comments: SOIL `BEFORE' DATA FROM TANK PULL SAMPLES; NO CONFIRMATION SOIL SAMPLES WERE <br /> COLLECTED FOLLOWING THE SVE REMEDIATION. WATER 'BEFORE' DATA FROM MW-2 ON 12122199; WATER <br /> `AFTER' DATA FROM MW-2 ON 1110/11. <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: NO Number Decommissioned: 0 Number retained: 10 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: ADRIENNE ELLSAESSER, REHS Title: ACTING PROGRAM COORDINATOR, UNIT IV <br /> Signator . fDate: <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, PG Response: <br /> Title: ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> Soil vapor samples collected January 20, 2011 passed the ESL's; one sample had benzene reported over the residential <br /> land use CHHSL. A Tier II evaluation was performed and concluded an unacceptable risk to human health did not exist. <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file. <br />