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Case Closure Summary Page 2 <br /> Leak!.... Underground Fuel Storage Tank gram <br /> III. Release and Site Gharaerization Information (continue <br /> Maximum Documented Contaminant Concentrations--"Before and After Cleanup <br /> Contaminant Soil (ppm) Water {ppm) Contaminant Soil (ppm) Water (ppm) <br /> i Before After Before After Before After Before ' After <br /> TPH (Gas) ND ND ND ND Xylene ND ND 1600 ND <br /> TPH (Diesel) ND ND 3700 ND Ethylbenzene ND ND ND ND:: <br /> Benzene ND ND ND ND Oil & Grease ND ND ND ND <br /> Toluene ND .0'07 ND ND Heavy metals NDND ND ND <br /> Other ND ND ND ND Other ND ND ND <br /> Comments (Depth of Remediation, etc.) : 3700: PPM DIESEL 1600 PPM XYLENE <br /> 1. CONTAMINATION DETECTED IN GRAB SAMPLE OF GROUNDWATER IN EXCAVATION DURING REMOVAL <br /> 2. .007 PPM TOLUENE .AT 10 FEET RESIDUAL IN SOIL BENEATH THE FORMER TANK EXCAVATION <br /> 3. NO GROUNDWATER CONTAMINATION DETECTED <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: 3 Number Retained: " <br /> List enforcement actions taken: NOTICE OF REIMBURSEMENT <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA HERAN Title: DIRECTOR OF ENVIRONMENTAL HEALTH <br /> Signature: '` - 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 />'t <br /> i <br /> This document and the related CASE CLOSURE L.ETTER, 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 />