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1 <br /> Case Closure Summary Pagee22 <br /> Leaking Underground Fuel Storage Tank Program, <br /> Ili Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH(Gas) 1900 ND ND Ethylbenene 23 ND ND <br /> TPH (Diesel) ND Xylene 25 ND ND <br /> Benzene a2 ND ND <br /> Toluene 7.4 ND ND <br /> MTBE <br /> Comments: The soil before results are from a soil boring. It was determined that there was limited soil contamination and <br /> remediation was not required so there are no after results for the soil. There was no groundwater contamination detected in <br /> two sampling occurrences. <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: 3 Number retained 0 <br /> List enforcement actions taken: NOR dated 5124/94 <br /> List enforcement actions rescinded: <br /> 1 <br /> V. Local Agency Representative Data <br /> Name: Donna He n Title: Director of Environmental Health <br /> All <br /> Signature- Date: <br /> V! ntral Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 6/19/97 Response Date: 718197 <br /> RB Staff: J. Brathovde Response: Concurrence <br /> Title: Assoc Eng Geologist <br /> VII. Additional Comments, Data, etc. <br /> SOIL ONLY <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 />