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Case Closure Summary Page 2 <br /> Leaki`'. 'Underground Fuel Storage Tank 1 , ram <br /> III. Release and Site Chararization 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) - - ND ND Xylene 2.000 <1 ND ND <br /> TPH (Diesel) - - ND ND Ethylbenzene .540 <1 ND ND <br /> Benzene .760 <1 ND ND Oil & Grease 4000 4000 ND ND <br /> Toluene 1.290 <1 ND ND Chloroform 1<1 ND .0006 .0006 <br /> Other - - ND ND 1,1,Didhloroathene<l ND .00060 .00057 <br /> 1,I,Dichloroethane<1 ND —.011 —.0026 <br /> 1,1,1Trichloroethane<l ND .008 .0029 <br /> Tetrachoroethene <1 ND .0005 .00065 <br /> Comments (Depth of Remediation, etc.) : <br /> <1000 PPM TPH OIL AND GREASE LEFT IN PLACE UNDER BUILDING SOUTH OF EXCAVATION. ONLY LOW <br /> CONCENTRATIONS OF CHLORONATED PETROLEUM HYDROCARBON IN MONITORING WELL FROM 1990 TO <br /> PRESENT. ' <br /> IV. Closure <br /> Does completed corrective action protect existing benefidial 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: Yea (No) Number Decommisioned: 0 Number Retained: 3 <br /> List enforcement actions taken: LEVEL ONE, NOTICE OF REIMBURSEMENT SENT TO RESPONSIBLE <br /> PARTY. <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name:DONNA HERRN Title: DIRECTOR OF ENVIRONMENTAL HEALTH DIVISION <br /> Signature: -` �ttit�j 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 /> LOW CONCENTRATIONS OF CHLORINATED PETROLEUM HYDROCARBON IN GROUNDWATER. NO TPH OR BTEX <br /> FOUND DURING GROUNDWATER INVESTIGATION. <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 />