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Case Closure Summary Page 2 <br /> L's' ing Underground Fuel Storage Tank Prom <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) 6.7 ND NA NA Ethylbenzene .09 ND NA NA <br /> TPH (Diesel) NA NA Xylene .11 ND <br /> Benzene .34 ND Oil & Grease NA <br /> Toluene .05 ND Heavy Metals NA <br /> Mineral Spirits NA I I I ILead NA <br /> Comments (Depth of Remediation, etc.): <br /> CONFIRMATION SAMPLING DURING THE PRELIMINARY ASSESSMENT REVEALED THE ABSENCE OF PETROLEUM <br /> HYDROCARBONS IN THE SUBSURFACE <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? (Yes) <br /> Monitoring wells decommissioned: (NA) Number Decommissioned: Number retained: <br /> List enforcement actions taken: NOR sent <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna eran Title: Director of Environmental Health <br /> Signature: 1 IDate: <br /> VI. Central Valley Regional water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: J. Brathovde Response: <br /> Title: Assoc Eng Geologist <br /> VII. Additional Comments, Data, etc. <br /> SOIL ONLY <br /> is document and the Felated CASE CLOSURE Lt I I tK, Shalle retaflne y t e ea agency as part of the o icia <br /> site file. (08/24/93) Exhibit N Page 2 of 2 <br />