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1 Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> III. Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations -- Before and After Cleanup <br /> Contaminant Soil Before (ppm) Water (ppm) Contaminant Soil Before (ppm) Water (ppm) <br /> After Before After After Before After <br /> TPN (Gas) NA NA <0.0005 Xylenes 0.99 <.005 <0.0005 <br /> [Benzene <br /> Diesel) 9100 110 0.150 Ethylbenzene <0.005. <.005 <0.0005 <br /> <0.005 <.005 <0.0005 Oil&Grease NA NA NA <br /> ene <0.005 <.005 <0.0005 Heavy Metals' NA NA NA <br /> MTBE <0.5 NA <0.0005 F <br /> Comments: Soil 'before'data from soil boring B-1 at 20 feet below grade on 8124199. Soil 'after' data is from BH8 at 11.5 <br /> feet below grade and water'after' data is from BH5 that were advanced on 01102108. <br /> Compliance with public participation requirements in Section 2728 of the California Code of Regulations has been met. <br /> IV. Closure <br /> F <br /> s completed corrective action protect existing beneficial uses per the Regional Board Basin Plan?YES <br /> s 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: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: MARGARET LAGORIO, REHS Title. PROGRAM COORDINATOR; UNIT IV <br /> Signature: Date: t r✓3 d �} <br /> _—[ <br /> Vi. Central Valley Regional Water Quality Control-Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: JAMES L.L. BARTON, PG Response: <br /> Title: ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> Consultant compared site data to the SFB-RWQCB Environmental Screen Levels (ESL) and reported no threat from the <br /> contamination remaining at the site. The current site usa a is not expected to change, it will remain a rail road facili# . <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 />