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i <br /> Case Closure Summary : Exhibit N Page 1 of 2 <br /> Case Closure Summary Page 2 ` <br /> Leaking Underground f=uel 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) 2900 Ethylbenzene 11 <br /> TPH (Diesel) Xylene 270 <br /> Benzene <5 Oil &Grease <br />` Toluene 6.5 Heavy Metals <br /> Mineral Spirits , Lead <br /> Comments (Depth of Remediation, etc.): 1 <br /> Approximately 50 yds soil were removed to a depth of 13 feet on 3/12185. Site closure based upon preliminary investigation <br /> completed 119197 which indicated a limted extent of soil contamination. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board <br /> Basin Plan? (Yes) <br /> Does completed, corrective action protect potential beneficial uses per the Regional Board <br /> 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 wells decommissioned: NA Number Decommissioned: Number retained: <br /> List enforcement actions taken: NOR sent <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> r <br /> Name: DonnHeran Title: Director of Environmental Health <br /> Signature: Date: —3 —c/ <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: y lb Response Date: <br /> i <br /> RB Staff: J. Brathovde Response: �o'.�����,� � <br /> Title: Assoc Eng Geologist <br /> VII. Additional Comments, Data, etc. <br /> Soil only <br /> This document and the related CAS—ECLOSURE LETTER, Shall be retained by the lead agency as part of the off-ictal <br /> site file. (08124193) Exhibit N Page 2 of 2 <br />