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Case Closure Summary Page 2 <br /> Leak" Underground Fuel Storage Tank( ''ogram <br /> III. Release and Site Char erization Information (continuem <br /> f Maximum Documented Contaminant Concentrations--Before and After Cleanup <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm),, Water (ppm) <br /> Before After Before Ater Before After Before After <br /> TPH (Gas) 5,300 130 2.399 IND Xylene 250 9.1 .4543 ND <br /> TPH (Diesel) Ethylbenzene NA .46 . .0773 . ND <br /> Benzene 19.0 ¢.005 .8354 ND ". Oil & Grease <br /> Toluene 510 .042 .305 ND Heavy metals <br /> Other Other <br /> Comments (Depth of Remediation, etc.) : Highest DTW in MW1 on 3/23/87; and love in.', EA5 on <br /> 10/18/95. Concentrations detected in groundwater (before) were obtained fro on <br /> 3/19/87. Groundwater (after) collected on 6/2/94 were all non-detect. <br /> i <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional 'Board <br /> Basin Pian? (Yes) Na <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 following monitoring well destruction. <br /> Should corrective action be reviewed if land use changes? Yes (No) <br /> Monitoring wells Decommisioned: Yes (No) Number Decommisioned: Number Retained: <br /> List enforcement actions taken: NOR on April. 5, 1990, 1/14/91, 10/14/92, 1/11/93 <br /> i <br /> 3 <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director <br /> Signature: Dates <br /> VI. RWQCB Notification <br /> Date Submitted to RB: 12/15/95 RB Response: <br /> RWQCB Staff Name: Gordon Boggs Title: Program Coord. Date: <br /> VII. Additional Comments, Data, etc. <br /> Groundwater Technology has estimated that approximately 262 pounds of hydrocarbons <br /> remain v� of J D <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 />