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z <br /> Case Closure Summary Page 2 �./ Nftd <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 (ppm) Water (ppm) <br /> After Before After After Before After <br /> TPH (Gas) 4,100 80 5.8 0.64 Xylenes 370 8.4 0.76 <0.0005 <br /> TPH (Diesel) 420 220 3.3 <.05 Ethylbenzene 92 16.0 0.16 <0.0005 <br /> Benzene 1.2 0.11 1.2 0.032 Oil &Grease NA NA NA NA <br /> Toluene 9.6 .016 0.052 <0.0005 Heavy Metals Pb<5.0 NA NA NA <br /> MTBE NA <0.005 <0.025 <0.001 <br /> Comments: SO)L 'BEFORE' DATA FROM TANK PULL SAMPLE RESULTS EXCEPT TPHd NUMBER FROM BORING B-4 <br /> @ 10 FEET BSG; SOIL `AFTER' DATA FROM OVER-EXCAVATION SAMPLES. WATER 'BEFORE' DATA FROM 10198 <br /> SAMPLING OF MW-2; WATER 'AFTER' DATA FROM MW 2A, 7109 SAMPLING EVENT, EXCEPT MTBE AND TPH- <br /> DIESEL ARE FROM 8/08. ESL SCREENING LEVELS ARE NOT EXCEEDED. <br /> IV. Closure <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 /> 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: YES Number Decommissioned: 13 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA HERRN, REHS Title: DIRECTOR, ENVIRONMENTAL HEALTH DEPT. <br /> Signature: Date: <br /> V1. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 11/20/09 Response Date: 12/18/09 <br /> RB Staff: JAMES L.L. BARTON, PG Response: CONCURRENCE <br /> Title: ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> COMPLIANCE WITH PUBLIC PARTICIPATION REQUIREMENTS IN SECTON 2728 OF THE CALIFORNIA CODE OF <br /> REGULATIONS HAS BEEN MET. <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file. <br />