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.-s <br /> Case Closure Summary Page 2 ti <br /> Leaking Underground Fuel Storage Tank Program <br /> Ill 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 <br /> After Before After 1 (ppm) Water (ppm) <br /> �i After Before After <br /> TPN(Gas) 630 24 8.0 0.064 Xylenes 13.0 0.2 0.20 <0.001 <br /> TPH (Diesel) NA NA NA NA Ethylbenzene 2.19 <0.1 0.064 <0.0005 <br /> i. Benzene 1.4 <0.1 0.013 <0.0005 I Oil&Grease NA NA lNA NA <br /> Toluene 1.3 <0.1 <0.0025 <0.0005 Heavy Metals NA NA NA NA <br /> MTBE <0.5 <0.05 0.016 0.0053 1 <br /> i <br /> Comments: SOIL 'BEFORE' DATA FROM TANK REMOVAL OR INITIAL SOIL BORING SAMPLES FROM TANK PIT <br /> AREA; SOIL 'AFTER' DATA FROM BORINGS.FOR MONITORING.WELLIMW-7j LOCATED IN TANK PIT.AREA.... 1 <br /> WATER'BEFORE' DATA FROM SOIL BORING GRAB SAMPLE AND.INITIAL GW.MONITORING.SAMPLES; WATER <br /> `AFTER'DATA FROM THE MOST RECENTLY REPORTED.GW MON ITORINGltVENT.. <br /> i <br /> IV. Closure a I ¢ <br /> 1 <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 /> li ;F <br /> I <br /> Does corrective action protect public health.for current land.use?. YES. I i} <br /> Site management requirements: NONE i <br /> I I <br /> Should corrective action be reviewed if land use changes?YES.. !. <br /> 4 <br /> Monitoring/Vapor wells decommissioned: 0..... .....Number Decommissioned:...G..- ....Number retained: .11. <br /> � <br /> 1 <br /> List enforcement actions taken: NORr <br /> List enforcement actions rescinded: NONE i 1 <br /> V... Local Agency Representative Data '' 1 <br /> Name:.MARGARET LAGORIO, RENS Title: SUPERVISOR, SITE MITIGATION UNIT <br /> Signature: Date: <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 Response.. I <br /> Title:. . -ENGINEERING GEOLOGIST. <br /> VII. Additional Comments, Data, etc. J, <br /> i <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 /> 3, <br /> 1 <br />