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r <br /> Case Closure Summary PagF-'). <br /> �`eaking Underground Fuel Storage'Tank ram <br /> { 111 Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations -- Before and After Cleanup <br /> li , <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH(Gas) <200 21 NA .057 MTBE NO <5.0 xxxxxx xxxxxx <br /> TPH (Diesel) 2080 3800 NA .5 Chromium'; 31 xxxxxx xxxxxx <br /> Benzene <.600 <.005 NA .0006 Nickel 22 xxxxxx xxxxxx <br /> I Toluene .761 .033 NA .001 Zinc 69 xxxxxx xxxxxx <br /> Xylene 18.4 .063 NA .002 xxxxxx xxxxxx <br /> Ethylbenzene 2.4 .016 NA <.0005 <br /> Oil&Grease 18100 NT NA NT <br /> TPHmo I NT 127000 1 NA <1.0 <br /> Comments: Heavy metal results from soil before are from UST#2 . Soil before petroleum and MTBE from UST removal. <br /> All soil and water after results are from the boring investigation. All soil sample results were ND for all contaminants below <br /> 20 feet bsg. Water after sample results collected at 54 feet bsg. Groundwater sample collected at 103 feet bsg was ND for <br /> all contaminants. <br /> F <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 /> i Does corrective action protect public health for current land use? YES <br /> Site management requirements: NONE <br /> R Should corrective action be reviewed if land use changes? YES <br />{ Monitoring/Vapor wells decommissioned: 0 Number Decommissioned: 0 Number retained: 0 <br /> i List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> I V. Local Agency Representative Data <br /> Name: DONNA HERRN, REHS Title: DIRECTOR, ENVIRONMENTAL HEALTH DIVISION <br /> Signature: Date: <br /> Vi, Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 08/08/00 Response Date: 09/07/00 <br /> RB Staff: MARTY HARTZELL Response': <br /> Title: ASSOCIATE ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> Minimal groundwater contamination, contaminants ND in groundwater at 103 feet bsg. Soil contaminants ND below 20 feet <br /> bsg. Curent groundwater is at—50 feet bsg. Nearest well is 300 feet distant from investigation area and screened below <br /> h detectable contamination from 216 to 226 feet bsg. <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 />