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Lear►+,ng Underground Fuel Storage Tank Prot,—'m <br /> ill Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations --Before and After Cleanup <br /> 7ne <br /> inant Soil (ppm) Water (ppm) Co taminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> <1.0 TC 0.0061 <0.005 <br /> s) 4.4 x0.005 <br /> esel) <100 <1.0 PC 0.021 <br /> l) 7,400 <10. 1,4- iChbenzene 0.078 <0.005 <br /> e <0.005 <0.005 1,2- CA <.005 <0.005 . <br /> .021 <0.005 Cr6 14. <.1 <br /> nzene .710 <0.005 Cr3 10. 18. <br /> 4.5 <0.005 Pb 14. <5WET <br /> 260) No Test <0.0056.170. 43. <br /> Comments: * No groundwater investigation conducted a required. No groundwater samples collected or <br /> encountered to total depth of 41.5' below ground surface (—hist orical high groundwater, 1986). <br /> WET=Waste Extraction Test performed. <br /> No soil remediation performed or directed. "Soil before" resul s from UST removal soil samples "TKA @ 7.5' bgs", <br /> "TK-2 @ 3' bgs" and Stockpile. "Soil after" results from LOP investigation soil borings "SBA @ 11.5' bgs and 16.5' <br /> b s" or"SB-2 20.5' b s". <br /> IV. Closure <br /> FDoescompletedted corrective action protect existing beneficial uses per the Regional Board Basin Plan? YES <br /> corrective action protect potential beneficial ses per the Regional Board Basin Plan? YES <br /> ive action protect public health for current land use? YES <br /> agement requirements: none <br /> orrective action be reviewed if land use changes? of necessa . <br /> Monitoring[Vapor wells been decommissioned? nla. Number Decommissioned: nla. Number retained: 0 <br /> rcement actions taken: NORR, 2.22-99 <br /> rcement actions rescinded: none <br /> V. Local Agency Representative Data <br /> =DonnaHeran itle: Director of Environmental Health <br /> ate: 9-�7-0i 11 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 24 Aug 01 Response Date: 12 Sept 01 <br /> RB Staff: Marty Hartzell esponse: concurrence with NFA <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> None <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 />