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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) 7400 1200 48 6.6 Ethylbenene 110 28 1.9 .35 <br /> TPH (Diesel) NA NA NA NA Xylene 650 60 3 .12 <br /> Benzene 44 3 2.1 .540 TCE <br /> Toluene 360 3.7 .5 .079 PCE <br /> MTBE NA 2 NA <.1 <br /> Comments: Soil Before Results from soil at 9 feet depth beneath 285 gallon UST removed on 11112191. Soil After Results <br /> from soil collected at the bottom of the excavation at 12.5 feet on 513199. Water Before Results from monitoring well MW 1 <br /> on 1215194. Water After Results from 16 feet depth grab sample from boring B14 on 7127100. 170 cubic yards of soil and <br /> 5300 gallons of groundwater were removed in May 1999. Water from monitoring wells that surround the former UST <br /> location and are within 40 feet of the former UST location,is non detect for contaminants of concern at appropriate detection <br /> limits. <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: Number Decommissioned: 1 Number retained: 3 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Title: Supervising RENS <br /> Signature: Date: f 17 d <br /> Vt. Central Valley Regional Water Quality Control Board (RB) Notification ` <br /> Date Submitted to RB: Response Date: <br /> RB Staff: Marty Hartzell Response: <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 <br /> site file. <br />