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Case Closure Summary Page 2 <br /> Leaping Underground Fuel Storage Tank Program <br /> Ill. 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) 13,000 44 154 <0.1 Xylenes 990 0.95 12.3 <0.0005 <br /> TPH(Diesel) 1,700 640 NA <0.05 Ethylbenzene 320 0.015 2.7 <0.006 <br /> Benzene <25.0 <0.0006 25.7 <0.0004 Oil & Grease NA NA NA NA <br /> Toluene 1,030 <0.0007 36.7 <0.001 Heavy Metals ND (Pb) NA NA NA <br /> MTBE NA <0.0009 NA <0.0005 <br /> Comments: SOIL 'BEFORE' DATA FROM BORING VW-1 @ 30' BSG EXCEPT TPH-D FROM TANK PULL SAMPLE_ SOIL <br /> 'AFTER' DATA FROM CONFIRMATION BORING CB-1 @ 20' BSG. WATER'BEFORE' DATA FROM MW-3 IN 1987; <br /> WATER'AFTER' DATA FROM VM-2 ON 2126109.VAPOR SAMPLES COLLECTED 10112109; ALL PASS THE ESL'S. <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 /> MonitoringNapor wells decommissioned: YES Number Decommissioned: 20 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA HERAN, RENS Title: DIRECTOR, ENVIRONMENTAL HEALTH DEPT. <br /> Signature: � Date: <br /> Vt. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 03/16/10 Response Date: 03/25/10 <br /> RB Staff: JAMES L.L. BARTON, PG Response: CONCURRENCE <br /> Title: ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> COMPLIANCE WITH PUBLIC PARTICIPATION REQUIREMENTS IN SECTON 2728 OF THE CALIFORNIA CODE OF <br /> REGULATIONS HAS BEEN MET. <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file. <br />