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Case Closure summary <br /> Page 2 <br /> Release and Site Characterization information (continued) <br /> FMaximumumented Contaminant Concentrations - - Before and After Cleanup <br /> Soil Before (ppm) Water (ppm) Con#aminant Soil BeforeAfter Before After (PPm) Water (pprn) <br /> After Bofore After <br /> 77.0 <1.0 0.067* 0.055* Xylenes <0.025 NA <0.0005 <0.0005 <br /> TPH (Diesel) 2,000 <1.0 <0.05 <0.05 Ethylbenzene <0.025 NA <0.0005 <0.0005 <br /> Benzene <0.025 NA <0.0005 <0.0005 Oil&Grease NA <10 <0.1 <0.1 <br /> Toluene <0.025 NA <0.0005 <0.0005 Heavy Metals 6.4 (Pb) NA NA NA <br /> MTBE <0.025 NA NA NA <br /> Comments: LEAD RESULT FROM SOIL STOCKPILE SAMPLE; ALL OTHER SOIL `BEFORE' DATA FROM TANK PIT <br /> SAMPLE TW-13; SOIL `AFTER' DATA FROM SOIL BORING B-1. GROUNDWATER DATA FROM MW-1 ON 1117111 AND <br /> 3118111. *LABORATORY REPORT INDICATES PRIMARILY COMPOUNDS NOT FOUND IN TYPICAL GASOLINE. <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 /> MonitoringfVapor wells decommissioned: YES Number Decommissioned: 1 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 List enforcement actions rescinded: NONE 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: f_ <br /> Vl. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 08/02/11 ' Response Date: 08/30/11 <br /> RB Staff: JAMES L.L. BARTON, PG Response: CONCURRANCE <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 site file. <br />