Laserfiche WebLink
Case Closure Summary <br /> Leaking Underground Fuel Storage Tank Program <br /> Former Cheaper Store No. 37 <br /> 15 East Grant Line Road,Tracy, California <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 Before After Before After <br /> TPH(Gas) 2,300 NA 300 <0.050 Ethylbenzene 28 NA 11 <0.0005 <br /> TPH(Diesel) 100 NA NA NA Xylenes 94 NA 110 <0.001 <br /> Benzene 4.3 NA 11 <0.0005 MTBE 4.0 NA 8.1 0.0033 <br /> Toluene 5.8 NA 36 <0.0005 1,2-DCA <0.025 NA <0.0005 <0.0005 <br /> Lead 6.03 NA NA NA <br /> Comments: The `Soil Before' concentrations for TPH (gas), toluene, and xylenes are from stockpile composite samples <br /> SP-8/SP-10 on 03/31/88; TPH-diesel from stockpile sample 28888 in July 1988; benzene from SB-4 @ 7.5-8 feet on <br /> 12/02/04; ethylbenzene from B-8 @ 6-6.5 feet on 07/20/95; MTBE and 1,2-DCA from CPT-2 @ 7 feet on 10/14/04; <br /> and lead from S-7-T1 @ 7 feet on 09/12/03. `Soil After' concentrations were not collected and not analyzed (NA). <br /> The `Groundwater Before' concentrations for TPH (gas), benzene and toluene are from BH-5 on 02/26/93, ethylbenzene <br /> and xylenes are from tank removal sample No. 2 on 03/03/88, MTBE from SB-3W on 12/02/04, and 1,2-DCA from MW-8 on <br /> 02/24/02. The `Groundwater After' concentrations for TPH (gas), benzene, toluene, ethylbenzene, and xylenes are from <br /> MW-1, MW-4, MW-5 and MW-8 on 03/14/11, MTBE from MW-1 on 03/14/11, and 1,2-DCA from all eight monitoring wells <br /> on 12/24/08. <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: 8 Number retained: 0 <br /> List enforcement actions taken: NOR on 10/03/90 and 07/30/92 <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director <br /> Signature: Date: January 24, 2014 <br /> VI Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: December 7, 2012 Response Date: December 18, 2012 <br /> RB Staff: James L.L. Barton Response: Concurrence <br /> Title: Associate 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 site file. <br /> Page 2 <br />