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r ',Case Closure Summary Page 2 <br /> Leakib4pyTinderground Fuel Storage Tank L..Aram <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) 4700 4700 .290 .290 Xylene 120 120 .004 <.0005 <br /> TPH (Diesel) 10 10 .200 .200. Ethylbenzene 22 22 .002 <.0005 j <br /> Benzene 5.7 . 0.56 0.001 0.0008 Oil & Grease - - - - <br /> Toluene 12.0 12.0 1 .130 .061 Lead 20 <0.5 - - <br /> Other Other <br /> i <br /> Comments (Depth of Remediation, etc.) : <br /> i <br /> G.W. MONITORING/SAMPLING FOR 5 YEARS DEMONSTRATES A STABLE LOW CONCENTRATION CONTAMINANT <br /> PLUME. SEASOIL MODEL SUPPORTS NO FURTHER ACTION. <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: <br /> Should corrective action be rev if land use changes? Yes (Ho) <br /> Monitoring wells Decommisioned: Yes (NO) Number Decommisioned: ANumber Retained: <br /> I <br /> List enforcement actions taken: N ICE OF REIMBURSEMENT SENT <br /> i <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name:MARGARET LAGORIO Title:SUPERVISING REHS/ENVIRONMENTAL HEALTH DIV <br /> Signature: Date: <br /> VI. RWQCB Notification <br /> Date Submitted to RB: RB Response: i <br /> 1 <br /> RWQCB Staff Name: Title: Date: <br /> VII. Additional Comments, Data; etc. <br /> i <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 />