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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> 111. 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 /> TPM(Gas) 5,000 2,100 30,0 1.1 Xylenes 480 200 2.0 0.0058 <br /> TPH (Diesel) 510 1,300 1.9 <.05 Ethylbenzene 100 47 11-2 <0,0005 <br /> Benzene 46 6.2 7.7 0A8 Heavy Metals 12-0 Pb NA 0.67(lead) NA <br /> Toluene 1260 157 1 1:9 1<0.0005 1 MTBE 120 1<0.5 10.26 10,02 <br /> Comments: SOIL 'BEFORE DATA ARE FROM SOIL BORING B5@6 FEET, EXCEPT TPHD AND MTBE FROM BORING <br /> B2@8 FEET, and Pb RESULT FROM PIPING LINE SAMPLE DURING TANK REMOVAL. SOIL'AFTER' DATA ARE FROM <br /> EXCAVATION FLOOR SAMPLE FLR-02, COLLECTED AT 8' BSG. WATER DATA ARE FROM WELL MW-1 B, EXCEPT <br /> Pb RESULT IS FROM A GRAB WATER SAMPLE TAKEN FROM THE TANK PIT DURING TANK REMOVAL ACTIVITIES. <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/Remediation wells decommissioned: YES Number Decommissioned: 4 Number retained: 19 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Re2resentative Data <br /> Name: ADRIENNE ELLSAESSER, REHS Title: ACTING PROGRAM COORDINATOR, UNIT IV <br /> Signature; Date: <br /> X 1714-11x�� 1 <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 /> COMPLIANCE WITH PUBLIC PARTICIPATION REQUIREMENTS IN SECTION 2728 OF THE CCR HAS BEEN <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file. <br /> nj <br /> M <br /> 7. <br /> M <br />