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Case Closure Summary Page 2 <br /> Leaking Underground f=uel Storage Tank Program <br /> II! Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations --Before and After Cleanup <br /> tnntnant Soil (ppb) Water (ppb) ContaminantI <br /> Before After Before After (Ppb) Water (ppb) <br /> After Before After <br /> ) 333 ..-- 170 Ethylbenzene <br /> sel) -- -- Xylene 6.2 194 1.1 <br /> 0.051 --»- 24.6 2.0 Oil&Grease "`-- 1010 4.2 <br /> 5.5 --- 73.2 <0.3 Heavy Metals .__pirits --- ---- Lead <0.--- 0.05 <0.01 <br /> ts (Depth of Remediation, etc.): Tanks were removed in 1980. Investigation shows minimal impact to soil and <br /> ter over the last 17 year period. Beneficial uses of groundwater are protected, now and in the future. <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 wells decommissioned: Yes Number Decommissioned: 4 Number retained: 0 <br /> List enforcement actions taken: NOR sent <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donripi.Jleran Title: Director of Environmental Health <br /> Signature: Date: <br /> V1. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: May 13, 1997 Response Date: May 29, 1997 <br /> RB Staff. ,lames Brathovde Response: Concurrence <br /> Title:Assoc Eng Geologist <br /> VII. Additional Comments, Data, etc. <br /> This document and the related CAE CLOSURE LEMR, Shall be retained " the lead agency as part of the <br /> official site file. (08124193) ExhiN Page 2 of 2 <br />