Laserfiche WebLink
` I <br /> h <br /> a I <br /> Case Closure Summary Page 2 <br /> Leaking Underground f=uel Storage Tank Program <br /> III Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations -- Before and After Cleanup <br /> •i` <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH (Gas) 48,000 21,000 <.05 405 Ethylbenene 910 490 .00072 <.0005 1 <br /> TPH (Diesel) Xylene 6,100 4,400 .0028 <.0005 <br /> Benzene <250 <.5 <.0005 <.0005 TCE <br /> Toluene 3,900 31 .00052 00005 PCE <br /> MTBE 180 1.8 .041 <br /> k <br /> f <br /> 4 <br /> Comments: Soil Before results are from beneath piping removed on 913193 at 6 feet below surface grade. Soil After results <br /> are from confirmation boring CB-10 on 2111199, except MTBE which is from MW1-50 on 8123199. Water Before results are <br /> from MW 1 on 1111100. Water After results are from MW3 on 6117102. Vapor extraction was conducted from 2/25198 until <br /> 2/99. <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? Yes <br /> Site management requirements: None <br /> Should corrective action be reviewed if land use changes?Yes <br /> ,3 <br /> Monitoring/Vapor wells decommissioned: No Number Decommissioned: 8 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Donna Heran I Title: Director of Environmental Health <br /> Signature: �� _ Date: 1 — 7-03 <br /> Vl. Central Valley Regional Water Quality Control Board (RB) Notification ! <br /> Date Submitted to RB: 10/16/02 Response Date: Concurrence <br /> RB Staff: Marty Hartzell Response: 11/15/02 <br /> Title:Associate Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> I, <br /> N <br /> •�i <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 /> I <br />