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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 /> n17, <br /> Contaminant soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After -Before After <br /> TPH (Gas) 7400 4200 48 6.6 Ethylbenene 140 .28 1.9 .35 <br /> TPH(Diesel) NA NA NA NA Xylene 650 60 3. .12 <br /> Benzene ,' 44 3 2.1 .540 TCI= <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 19112191. Soil After Results <br /> from soil collected at the bottom of the excavation at 12.5 feet on 513/99. Water Before Results from monitoring well MW1 <br /> on 1215/94. 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 Moy 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 /> MonitoringNapor.wells decommissioned: Number Decommissioned: 4 Numberiretained: 0 <br /> List enforcementactions taken: NOR <br /> List enforcement:actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: DONNA.:'RERAN DIRECTOR OF ENVIRONMENTAL HEALTH <br /> Signature: Date: <br /> 1. Central Valley Regional Water Quality Control Board (RB)Notification <br /> Date Submitted to RB: Response Date: 0 <br /> 04/19/01 6/01/01 <br /> RB Staff: Marty Hartzell Response: <br /> Title.Associate Engineering Geologist CONCURRENCE <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 />