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..oe <br /> 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 /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH (Gas) 49 <1 5.8 <.050 Ethylbenene 8.6 <.005 NA <.0005 <br /> TPH(Diesel) NA NA NA NA Xylene 38 <.01 1.3 <.001 <br /> Benzene 2.9 <.005 .1 <.0005 MTBE 1.006 <.005 NA <.0005 <br /> Toluene 43 <.005 .4 <.0005 <br /> Comments: Soil Before Results are from soil sample collected beneath the UST removed in 1986, except MTBE which is <br /> from the soil sample collected beneath the UST removed in 1997. Soil After Results are from the July 2003 Geoprobe <br /> investigation around the UST removed in 1997. Water Before results are from MW17 on 11/3/86. Water After Results are <br /> from water samples collected from monitoring wells and geoprobes in July 2003. <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 /> Number Monitoring/Vapor wells : 2 . Number Decommissioned:2 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director of Environmental Health Department <br /> Signature: _ Date: 3—15 U <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 10/03/03 Response Date: 10/30/03 <br /> RB Staff: James L.L. Barton Response: Concurrence <br /> Title:Associate Engineering Geologist <br /> VII. Additional Comments, Data, etc. <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 />