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z <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) 794 ND Free ND Xylene 169 ND Free ND <br /> TPH (Diesel) NA ND Product ND Ethylbenzene 22 ND Product ND <br /> Benzene 50 ND ND Oil & Grease <br /> Toluene 74 ND ND Heavy metals <br /> Other Other <br /> Comments (Depth of Remediation, etc.) : <br /> Vapor extraction October - November 1989 removed 1950 lbs. hydrocarbons. <br /> Vapor extraction June - September 1992 removed another 338 lbs. hydrocarbons. <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: None <br /> Should corrective action be reviewed if land use changes? Yes (No) <br /> Monitoring wells Decommisioned: Yes (No) Number Decommisioned: Number Retained: 4 <br /> List enforcement actions taken: NOR 10/8/90 <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: (y <br /> Donna ran Title: Director Environmental Health <br /> Signature: f" Date: 11 —q6 <br /> VI. RWQCB Notification <br /> Date Submitted to RB: 9/16/93 RB Response: Concurrence <br /> RWQCB Staff Name: E. Thayer Title: Associate Eng. Date: 9/27/93 <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 />