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a <br /> s� <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) 18000 826 .194 <.50 Ethylb6nene 310 16.7 .006 .0003 <br /> TPH (Diesel) Xylene 2000 73.9 .019 .003 <br /> Benzene <25 4.1 .003 .004 <br /> Toluene 250 4.9 .002002 . MTBE <.005 <A02 <.005 <br /> Comments: All levels in ppm. Soil Before is from soil below UST at time of removal. Soil After levels are from MW1 at 30'. <br /> below grade, at 40' below grade was ND. Groundwater Before is from MW1 on 8126197. Groundwater After is.from MW1 on <br /> 1/27198 sample B. <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: Yes Number Decommissioned: 1 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran ..Title: Director of Environmental Health <br /> Signature: or- w Date:, <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 050698 'Response Date: 06/02/98 <br /> RB Staff: Mark List Response: <br /> Title: 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 />