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Exhibit N Page 1 of 2 <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 /> JtITPH <br /> ' Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> (Gas) 1,250 ND 3.75 ND Xylene 314 0.200 0.550 ND <br /> TPH (Diesel) 31 ND NA ND Ethylbenzene 38 0.016 0.105 ND <br /> Benzene 21 ND 0.331 ND Oil & Grease NA NA NA NA <br /> Toluene 65 ND 0.090 ND Heavy metals NA NA NA NA <br /> Other NA NA NA NA Other NA NA NA NA <br /> Comments (Depth of Remediation, etc.) :VAPOR EXTRACTION AND OVEREXCAVATION REMEDIATED THE <br /> GASOLINE CONTAMINATION AT THIS SITE. GROUNDWATER HAS BEEN ND SINCE 1992. CONTAMINATION <br /> RESIDUAL IN SOIL ESTIMATELY AT 0.05 POUNDS OF HYDROCARBON. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board <br /> Basin Plan? (Yes) No <br /> Does completed corrective action protect potential beneficial uses per the Regional Board <br /> Basin Plan? (Yes) No <br /> Does corrective action protect public health for current land use? (Yes) No <br /> Site management requirements: NA <br /> Should corrective action be reviewed if land use changes? Yes (No) <br /> Monitoring wells Decommisioned: (Yes) No Number Decommisioned: 5 Number Retained: 0 <br /> List enforcement actions taken: FIRST LEVEL; NOR AND SITE LETTER <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: DONNA ERAN Title: DIRECTOR OF ENVIRONMENTAL HEALTH <br /> Signatures � Date: <br /> VI. RWQCB Notification <br /> Date Submitted to RB: RB Response: <br /> RWQCB Staff Name:G L BOGGS Title: Date: <br /> VII. Additional Comments, Data, etc. <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency <br /> as part of the official site file. (08/24/93) <br /> Exhibit N Page 2 of 2 <br />