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Case Closure Summary : Exhibit N l, Y 1 of 2 ...t <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 Sail Soil Water Water Contaminant Soil Soil Water Water <br /> Before After Before After Before After Before After <br /> (ppm) (ppm) (ppb) (ppb) (ppm) (ppm) (ppb) (ppb) <br /> TPH (Gas) <1 <1 NA .05 Ethylbenzene <.002 <.005 NA <.0003 <br /> TPH (Diesel) <1 NA NA NA Xylene <.002 <.005 NA <.0003 <br /> Benzene 2.4 <.005 NA <.0003 <br /> Toluene <.002 <.005 NA <.0003 <br /> MTBE --- <.05 NA <.005 <br /> LNo remediation required. Soil before results were from sail sampled at the time of UST removal Soil and groundwater after <br /> sults were from preliminary assessment borings. <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? NO <br /> Monitoring wells decommissioned: NA Number Decommissioned: NA Number retained: 4 <br /> List enforcement actions taken: NOR sent <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran 1&L Aft r f o Title: Director of Environmental Health/.SV,*"V/t5l 2E <br /> Signature: a.L. Date: l 4 C( <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff. Response: Concurrence <br /> Title: <br /> VII_ Additional Comments, Data, etc. <br /> Soil only. <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part <br /> of the official site file. (08124193) Exhibit N Page 2 of 2 <br />