Laserfiche WebLink
Case Closure Summary Page ,. <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 Before After Before After <br /> TPH (Gas) 12000 560 12 <2 Xylene 1500 <0.05 1.9 <0.04 <br /> TPH (Diesel) NA NA NA NA Ethylbenzene 230 <0.05 0.5 <0.02 <br /> Benzene 26 <0.05 1.0 <0.02 Oil &Grease NA NA NA NA <br /> Toluene 970 <0.05 2.4 <0.02 MTBE NA 0.1 1.8 0.052 <br /> 1,2-DCA NA <0.05 0.037 0.012 <br /> Comments: Soil Before concentrations are from boring for MW 1 at 16 feet below grade. Soil After concentrations are from <br /> CPT-1A at 10 feet below grade after remediation. Groundwater Before concentrations are from VW-2D (flooded vapor well) <br /> (TPN & BTEX on 5115197, MTBE on 8113197, 1,2-DCA on 11112199). Groundwater After concentrations are from MW5 on <br /> 12115105. Public Participation requirements in Section 2728 of the California Code of Regulations has been met. <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 installed: 15 Number Decommissioned: 15 Number retained: 0 <br /> List enforcement actions taken: NOR sent to RP. <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Donna Hera n Title: Director of Environmental Health <br /> Signature: Date: <br /> r <br /> VI. C tr Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 7!5107 Response Date: 8117107 <br /> RB Staff: James 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 />