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A I <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 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 /> s <br /> TPHdiesel 5200 ND NA NA <br /> Toluene 0,035 ND <br /> Ethylbenzene 0.093 ND k <br /> Xylene 0.98 ND ff <br /> f <br /> Comments: Soil Before samples were stockpile soil that was returned to UST pit. Soii After samples were from beneath <br /> UST at 15 feet bsg. No water was encountered. Contaminated stockpile was replaced back into UST and piping <br /> excavation on top of clean fill. <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: 0 <br /> List enforcement actions taken: NOR sent <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran //nG� r( 0 Title: Director of Environmental Health L( <br /> Signature: Date: t-{ .1 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> l <br /> RB Staff: Mark List Response: <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> Soil only contamination. Approximately 1.,200 mg/kg of WI<Qiiesel and 5 lbs. of TRH motor oil was calculated as being left' <br /> in place contained in a total of 35 tors of overexcavated soil. Approximately 40 feet of soil separate the contaminated soil <br /> from groundwater. <br /> This document and the related CASE CLOSURE LETTER,Shall be retained by the lead agency as part of the official site file. <br /> (08124193) Exhibit N Page 2 of 2 <br />