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w../ '"OV' <br /> 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 (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After I I Before After Before After <br /> TPH (Gas) 3540 NA 53 40 Xylene 231 NA 15.66 14 <br /> TPH (Diesel) 5000 NA <0.49 <0.50 Ethylbenzene 51.1 NA 2.51 3.2 <br /> TPH (Kerosene) 1480 NA 13.2 <0.250 Grease NA NA NA NA <br /> TPH(Motor Oil) 130 NA <1.2 <0.250 Lead(Pb) 9.4 NA NA NA <br /> Benzene 10.2 NA <0.5 <0.025 MTBE 1.31 NA 0.19 NA <br /> Toluene 129 NA 10.6 1.3 1,2 DCA 0.028 NA 0.16 0.025 <br /> Comments: SOIL BEFORE CONCENTATIONS: TPH-g, benzene (B), toluene (T), xylene (X), and ethylbenzene (E) are <br /> from GeoProbe sample GP3-36 at 36' on 12/29/2000; TPH-d is from UST removal sample TK-10-N at 10' on 7/30/1998; <br /> TPH-k is from GeoProbe sample GP1-18 at 18' on 12/28/2000; TPH-mo is from UST removal sample TK-10-S at 10' on <br /> 7/30/1998; MTBE is from GeoProbe sample GP2-31 on 12/28/2000; Pb from stockpile TK11 on 7/23/1998; and 1,2,DCA is <br /> from MW-8 at 53' on 5/26/2006. <br /> SOIL AFTER CONCENTRATIONS: no after results are available. WATER BEFORE CONCENTRATIONS:TPH-g and B <br /> are from MW-4 on 12/28/2007; TPH-d is from MW-3 on 8/10/2004; TPH-k is from MW-4 on 6/8/2006; TPH-mo is from <br /> MW-4 on 6/7/2010; T, E, and T are from MW-4 on 12/28/2006; and 1,2 DCA is from MW-3 on 11/10/2004, <br /> WATER AFTER CONCENTRATIONS: After results are from MW-4 on 12/28/2012, <br /> NA=Not Anal zed <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: 9 Number retained: 0 <br /> List enforcement actions taken: NOR sent to the RP on 4/27/2000 <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director <br /> Signature: ( Date: 05/12/14 <br /> 1 <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: 06/04/13 Response Date: 06/10/13 <br /> RB Staff: James L.L. Barton Response: Concurrence <br /> Title: 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 />