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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 /> ii <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH (Gas) Xylene .0015 ND <br /> TPH (Diesel) 2300 22 Ethylbenzene <br /> Benzene .0013 ND Oil & Grease <br /> Toluene .0009 ND Heavy metals <br /> Other Other <br /> Comments (Depth of Remediation, etc.) : <br /> SOIL REMOVED TO 18' BGS. ONE SOIL SAMPLE (SS-07) COLLECTED 05/14/87 <br /> CONTAINED 22 PPM DIESEL, ALL OTHERS ND <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: <br /> Should corrective action be reviewed if land use changes? Yes (NO) <br /> Monitoring wells Decommisioned: (Yes) No Number Decommisioned: 4 Number Retained: 0 <br /> List enforcement actions taken: <br /> FIRST LEVEL ENFORCEMENT LETTER SENT, PLACED SITE IN LOP <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> L'aDONN RERAN Title: DIRECTOR OF ENVIRONMENTAL HEALTH <br /> ure: Date: <br /> VI. RWQCB Notification <br /> Date Submitted to RB: RB Response: <br /> RWQCB Staff Name: Title: Date: <br /> VII. Additional Comments, Data, etc. <br /> OVEREXCAVATION PERFORMED TO 18 FEET (22 PPM DIESEL REMAINED) . <br /> FOUR MONITORING WELLS INSTALLED. NO FURTHER SOIL CONTAMINATION FOUND BUT LOW LEVEL BTEX <br /> AND DIESEL DISCOVERRED IN GROUNDWATER. GROUNDWATER CONTAMINATION DECLINED, LAST 2 <br /> CONSECUTIVE ROUNDS ND. <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 />