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Ar 0- _ <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 (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH (Gas) 510 NA .6 .57 Ethyibenzene 2.3 NA .0013 .0019 <br /> TPH (Diesel) NS NS NS NS Xylene 2.2 NA .0062 .0084 <br /> Benzene ND ND .0005 ND Oil &Grease ND NS NS NS <br /> Toluene .17 NA .0007 ND Heavy Metals NS NS NS NS <br /> Mineral Spirits NS NS NS NS Lead 31 NA NS NS <br /> MTBE NS NS NS NS <br /> Comments (Depth of Remediation, etc.): Over excavation to depth of 10 feet. Closure based on absence of benzene <br /> XV. 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: (No) Number Decommissioned: 0 Number retained: 3 <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 List enforcement actions rescinded: None 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: ate: <br /> VI. 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 /> Closure based on absence of Benzene. <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the <br /> official site file. (08124193) Exhibit N Page 2 of 2 " 't <br />