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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> Ill Release and Site Characterization information (continued) <br /> Maximum Documented Contaminant Concentrations --Before and After Cleanup <br /> tt� <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH(Gas) 16200 16200 .440 .170 Xylene 1920 1920 .002 .0027 <br /> TPH(Diesel) Ethylbenzene 308 308 .0011 .00067 <br /> Benzene <.0005 <.0003 Oil &Grease <br /> Toluene 49.2 49.2 <.001 .0031 Heavy Metals <br /> MTBE .099 .099 .042 .005 <br /> Comments: Cleanup was not performed. The Soil Before and the Soil After results are from PBI at 20 feet below grade on <br /> 4114197. The Water Before results are from MW2 on 5111100 except MTBE which is from MW1 on 118101. The Water After <br /> results are from MW I or MW2 on 4119101. <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: No Number Decommissioned: 0 Number retained: 4 <br /> List enforcement actions taken: level 1 <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Title: Supervising REHSISite Mitigation/LOP Unit IV <br /> Signature: Date: a ' <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: M. Hartzell Response: <br /> Title: Assoc Eng 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 />