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Case Closure Summary Page 2 <br /> Leaking Underground-Fuel Storage <br /> 'Tank Program <br /> 111 Release and Site Characterization Information (continued) <br /> t <br /> ximum Documented Contaminant Concentrations --Before and After Cleanup <br /> m Contaminant Sail (ppm) Water (ppm) <br /> Contaminant Soil (ppm) Water (Ppm) Before After Before After I <br /> Before After Before After 7.6 .053 <;0005 <br /> TPH (Gas) 570 550 3 <:05 Ethylbenene NA <:0006 <br /> 750 �A5 <:05 Xylene 250 32.5 .107 <br /> TPH(Diesel) NA <.0005 MTBE NA <.005 <.001 <.001 <br /> Benzene <20 1.1 .490 <br /> Toluene 84 8.4 .049 <.0005 <br /> Comments: Soil Before data is from samples collected beneath (6 feet deep)the USTs when they were removed in April <br /> 1988. Soil After data is from MW6 at 10 feet on 5117106. Water Before data is from MW3 on 11116105. Water After data is <br /> from MW3 on 10116108. Active remediation was not performed. Minimal soil contamination exists in the former UST area <br /> an g sample d groundwater le from all the wells are non-detect. <br /> p <br /> IV. Closure <br /> .D.oes--ompleted-corxecti.ve-aC ion-protect-eidstingbeneficial-uses-per-the-Regional-Beard-Basin-P-lan?—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: 6 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> 3 Name: Margaret Lagorio Title:. Program Coordinator <br /> Signature: Date: j <br /> VI. Central Valley Region Water Quality C. trol Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: James L.L. Barton Response: <br /> Title: Associate Engineering 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 />