Laserfiche WebLink
Case Closure Summary P,_--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 Xyl ne 490 .490 $.1 1.03 I <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 He y Metals <5 <5 NA NA <br /> MT E <.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 monitoring period from 1999 to 2005. <br /> i <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?Ye <br /> Site management requirements: NA <br /> Should corrective action be reviewed if land use changes? NA <br /> Monitoring/Vapor wells :5 Number Decommissioned: 0 14umber retained: 5 <br /> List enforcement actions taken: NOR sent to RP <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Tit e: Supervising REHSISite Mitigation/LOP Unit IV <br /> Signa#ure: Date: � j)- <br /> Vi. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: J. Barton Response: <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 />