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Case Closure:Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> lit Release and Site Characterizatlo.n Information (continued) <br /> rMaximum Documented Contaminant Concentrations�-Before and After Cleanup <br /> m Water {ppm} Contaminant, Solt (ppm} Water (ppm) <br /> taminant Soil (PP ) Before After Before After <br /> BeforeAfter Before After <.0005 <.0005 033 <.000S <br /> <.2a. <1 7 9 <.05 Ethylbenene <br /> {+Gas)(Disrset) 21 <5 ` 10 .074 Xylene <.001 <,0Q0.5 .2. <br /> Benzartie <br /> <0005 <:0005 .14t}: <.0005 MTBE <:0titta: NA <..b01 x.0005:. <br /> Toluene' <,ft00:5. <0005 .033 <.0005 <br /> Comments: The Soil.Befor.e results are from the soil beneath the underground storage tanks when they were removed on <br /> 4/25107. The Soit After res:utts.are from the soil::coIJected during installation of the'manitoring wells on 4128108. The(Nater <br /> Before resultsare:;from the or sample..collecfed on 5118/07.: The Water After results are from Mon oring well MV113 on. <br /> 112/29/08. <br /> . <br /> IV;Closure <br /> Coes completed:corrective action protect existing beneficial uses per the Regional Board Basin Pian? Yes <br /> Does completed corrective action.protect potential beneficial uses per the Reglomat 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?No <br /> Monitoring/Vapor wells decommissioned: Yes Number Decommissioned: 3 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> !Name. Donna Horan 'title; Direct o nvironmental Health <br /> Signature: ,, Date; pf <br /> VI. ntr alley Regional Water Quality Contr I Board (RB)Noti i a n <br /> a Submitted to RB; 3/23/09 Respons,o.Date: 3/27/09 <br /> RB Staff: James-L.L. Barton Response: Concurrence <br /> Titie::Associate En ineerin Geolo ist <br /> VII. Additional Comments,.lata, etc. <br /> The site:is now a City of Lathrop sidewalk and adjacent landscape with no plans to change site usage.:in the future. S±a i <br /> sarm' le results from the moh§Hng well installed on 4/28/08 pass the SFBRWQC13 Environmental Screenin Levels: <br /> This document and the related CASE CLOSURE LETTER,Shall be retained.by the dead agency as part:of the.officlal <br /> site film. <br />