Laserfiche WebLink
j <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 nd 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) 7,600 NA 4.9 0.78 Xylenes 780 NA 1.0 0.055 <br /> TPH(Diesel) NA NA NA NA MT E <0.5 NA <0.002 NA <br /> Benzene <0.25 NA 0.39 0.13 1,2-DCA <0.5 NA 0.36 X0.0005 <br /> Toluene 21 NA 0.87 <0.001 Methanol <200 NA <0.5 NA <br /> Ethylbenzene 82 NA 0.25 0.12 Eth inot <100 NA <0.25 NA <br /> ED <1.0 NA <0.002 NA <br /> Comments: Soil Before concentrations are taken from CPT boring B-1 at 21.5 feet bsg on July 19, 2001; Soil Atter data <br /> are not available since confirmation samples were not collected. Water Before concentrations for gas, BTEX, MTBE, and <br /> EDB are taken from MWA on 09127107; and 1,2-DCA, methanol, and ethanol from MWA on 10131105. Water After <br /> concentrations are taken from MWA on 11117109. NA—not an z d <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses pe 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 /> MonitoringNapor wells decommissioned: Yes Number Decommissioned: 9 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: None <br /> s <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, RENS Tit e: Director <br /> Signature: Date: <br /> I I- I L;a�� <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: March 11, 2011 Response Date: March 30, 2011 <br /> RB Staff: James Barton, PG Response: Concurrence <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> This document and the CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file. <br />