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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> I11 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) 49 15 Ethylbenzene NA .005 <br /> TPH (Diesel) Xylene 18 .2 . <br /> Benzene 2 ND Oil &Grease <br /> Toluene 2 .006 Heavy Metals <br /> Mineral Spirits Lead 9.9 NA <br /> MTBE NA .029 <br /> Comments (Depth of Remediation, etc.): <br /> Site closure based on results of 11/13!97 preliminary investigation which indicated minor contamination <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 wells decommissioned: Yes Number Decommissioned: Number retained: <br /> List enforcement actions taken: NOR sent <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director of Environmental Health <br /> Signature: Date: <br /> V1. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: J. Brathovde Response: <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. (08124/93) Exhibit N Page 2 of 2 <br />