Laserfiche WebLink
i <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 Before After Before After <br /> TPH(Gas) 12.0 12.0 35.0 6.5 Xylc ne .490 .490 8.1 1.03 <br /> TPH(Diesel) NA NA NA NA Eth benzene .500 .500 1.3 .521 <br /> Benzene <005. <005. .15 <.006 Oil &Grease NA NA NA NA <br /> Toluene .110 .110 2.7 .09 Heavy Metals <5 <5 NA NA <br /> MTBE <.01 <.01 .12 <.01 <br /> Comments:The Before and After Soil results are from MW-2, located in the former UST area, at 45 feet bgs. MW-2 was <br /> the only well that indicated any soil contamination. The groundwater results are from GMX-1 located down-gradient from the <br /> UST area. <br /> GMX-1 had the highest gasoline concentrations throughout the mon toring period from 1999 to 2005. <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 pi r the Regional Board Basin Plan? Yes <br /> Does corrective action protect public health for current land use? Ye <br /> Site management requirements: NA <br /> Should corrective action be reviewed if land use changes? NA <br /> Monitoring/Vapor wells :5 Number Decommissioned: 5 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 List enforcement actions rescinded: NA 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 Heran Title: Director of Environmental Health <br /> Signature: ��- Date- <br /> VI. <br /> a e:VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 8/3/2005 Response Date: 8123105 <br /> RB Staff: J. Barton Response: Concurrence <br /> Title: Eng. Geologist <br /> VII. Additional Comments, Data, etc. <br /> A groundwater pump and treat system removed 824,626 gallons and gasoline and concentration were significantly <br /> reduced. <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 />