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Case Closure Summary Page 2" <br /> 4ing Underground Fuel Storage Tank.Prog a <br /> lfl Release and Site Characterization Information (continued) <br /> 77TBAIA4 <br /> Documented Contaminant Concentrations - -Before and After Cleanup <br /> nt Soil (ppm) Water (ppm) Contaminant Soil <br /> Before After Before After (ppm) Water. (ppm) <br /> Before After Before After <br /> <1.0 <1 0.270. NA- Ethylbenene <0.025 <0.005 <0.0005 NA <br /> l) <1.0 1.1 0.079 NA Xylene <O.D25 <O.ODS <0.0005 NA <br /> <0:025 <O.D05 <0.0005 NA MTBE 2.1 <0..005 <0.0005 NA <br /> <0.025 <d:005 <0.0005 NA Ethanol <2 <0.010 0.043 NA <br /> NA NA 0.00561 NA Chloroform NA- NA 0.260 . NA <br /> 14.5 <O.ODS <0.005 NA <br /> Comments: Soil Before results are from soil beneath the Regular fill bucket on 1130104. Soil After,results for TPH diesel are <br /> from soil boring B-2-7@36'collected on 10120104, all other soil samples collected at that time at various depths were non- <br /> detect for all contaminants of concern. Water Before results are from soil boring B-2 collected at approximately 40 feet bsg <br /> on 10120104, except the water result for dodecane is from soil boring B-1 and is reported as an.estimated value (J)since the . <br /> result was taken from a Tentatively Identified Com ound (TIC) search. NA—not analyzed <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan? Yes <br /> Does completed corrective action protect potential beneficial uses per the Regional Board 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/Vapor wells decommissioned: NA Number Decommissioned: NA Number retained: NA <br /> List enforcement actions taken: NOR 02/20/04 <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data ' <br /> Nam : Donna Heran EHS Title: Director.of Environmental Health Department <br /> Si ature: Dater <br /> Vi. Ce al alley Region ater Quality Control Board (RB} Notification +'+ <br /> " k <br /> Date Submitted to RB: March 4, 2008 Response Date: April 2;2008 <br /> RB Staff: James L.L. Barton Response: No Further Action Required Concurrence <br /> Title: Associate Engineering Geologist <br /> VII. Additional Comments, Data, etc. w <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official <br /> site file. <br /> i <br /> s <br /> k <br />