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` Case Closure Summary Pagr <br /> %weeakfng Underground Fuel Storage Tank gram � �+•� `� <br /> Ifl 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) ND NA ND ND Xylene ND ND ND NO <br /> TPH (Diesel) NO 54 NO NO Ethylbenzene NO NO NO ND <br /> Benzene ND NO NO NO Oil &Grease 12,000 160 16.2 NO <br /> Toluene NO .015 NO ND Heavy Metals ND ND NA NA <br /> MTBE NA NA NA .0007 <br /> Comments: Soil before results from sample beneath UST#3 at time of removal, 09122189, soil after results from MW-5 at <br /> 20feet bsg. Water before results from MW-1 06/25/92, water after results from MW-1 09108198. Over-excavation of soil in <br /> UST#3 area on 01/25190, and UST#4 area on 04/23-28/93. <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: 0 Number Decommissioned: 0 Number retained: 5 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA HERRN, REHS Title: DIRECTOR, ENVIRONMENTAL HEALTH DIVISION <br /> Signature: Date: <br /> - 3 --cx) <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 10/12/99 Response Date: 11/15/99 <br /> RB Staff: MIKE SMITH Response: CONCURRANCE <br /> Title: ENVIRONMENTAL SPECIALIST II <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 />