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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 /> Water (PPB) <br /> Contaminant Soil (ppm) Water (PPB) Contaminant Before (After Before After <br /> Before After Before After <br /> 200.0 0.16 3.2 <0.5 <br /> TPH (Gas) 3,600. <1.0 790.0 <50.0 Xylene _ <br /> TPH (Diesel) 32.0 <5.0 720.0 <50.0 Ethylbenzene 45.0 0_010 _4_5 <br /> Benzene 16.0 <.005 82.0 <0.5 Oil & Grease ---- ---- <br /> Toluene 89.0 <.005 22.0. <0.5 HeaOther metals <br /> Other <br /> Comments (Depth of Remediation, etc.) : <br /> BULK OF IMPACTED SOIL SUCCESSFULLY RE14EDIATED BY VAPOR EXTRACTION TECHNOLOGY. <br /> ONLY 0.010 AND 0.16 PPM OF ETHYLBENZENE AND XYLENE, RESPECTIVELY, WERE DETECTED IN <br /> ONE OF SEVEN CONFIRMATION SBS AT 21' BGS. GROUNDWATER SHOWS ND FOR SEVERAL QUARTERS. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board <br /> Basin Plan? YES <br /> Does completed corrective action protect potential beneficial uses per the Regional Board <br /> Basin Plan? YES <br /> Does corrective action protect public health for current land use? YES <br /> Site management requirements: NONE <br /> Should corrective action be reviewed if land use changes? NO <br /> Number Decommisioned:l4 Number Retained: 0 <br /> Monitoring wells Decommisioned: YES <br /> List enforcement actions taken: INITIAL DIRECTIVE LETTER <br /> List enforcement actions rescinded: NONE <br /> 1 11 <br /> V. Local Agency Representative Data <br /> Name: DONNA HERAN Title: DIRECTOR, ENVIRONMENTAL HEALTH DIVISION <br /> Signature: Date: � ' 6 <br /> VI. RWQCB Notification <br /> Date Submitted to RB: 12-21-95 RB Response: CONCURRENCE TRC MEETING PRESENTATION <br /> RWQCB Staff Name: BOGGS Title: UGT MANAGER Date: 12-21-95 <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 /> r <br />