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Case Closure Summary Page. <br /> 'w4aking Underground Fuel Storage Tank gram Co. py <br /> L <br /> III Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations -- Before and After Cleanup <br /> Contaminant Soil 7 (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH(Gas) 5500 26.0 <.05 Xylene 310 2.2 <.0005 <br /> TPH (Diesel) NA NA NA Ethylbenzene 310 .84 00005 <br /> Benzene 22 .53 <.0005 Oil S Grease NA NA NA <br /> Toluene 140 1.8 <.0005 Heavy Metals NA NA NA <br /> MTBE NA NA <.005 <br /> Comments: Soil Before Results are from SBA2-16' on 216/96. No Active Remediation was performed or confirmation soil <br /> sampling so there are no Soil After Results. Water Before Results are from SBA on 11128/93. Water After results are from <br /> the monitoring wells on 7122197. Information from 26200 Galt Rd., Thornton (adjacent site)was used to evaluate the extent <br /> of contamination at this site. <br /> NA= NOT ANALYZED <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: YES Number Decommissioned: 3 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA HERRN Title: DIRECTOR ENVIRONMENTAL HEALTH DIVISION <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 01/12/00 Response Date: 03/13/00 <br /> RB Staff: MARTY HARTZELL Response: CONCURRENCE <br /> Title: ASSOCIATE ENGINEERING GEOLOGIST <br /> Vil. 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 />