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t <br /> Case Closure Summary Page'`�,,� <br /> `Leaking Underground Fuel Storage Tank Fram <br /> III Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations -- Before and After Cleanup <br /> F <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPW (Gas) 250 <1.0 NT... <.001 Xylene 10 <.005 NT... <.0005 <br /> TPH(Diesel) 3500 420 .056 Ethylbenzene 1.4 <.005 <.0005 <br /> Beniene .14 <.005 <.0005 Oil &Grease NA 3100 <.250 <br /> Toluene .81 <.005 10005 Chromium 40 NT NT <br /> PCB', 3.5 <.6 <.0005 Lead 110 NT NT <br /> TCE .01 <.005 <.001 :MTBE <.40 <0.005 <.001 <br /> PCE E .22 .250 .0016 <br /> 1,2 DCE 1.046 1<.005 1 1<.001 - J <br /> Comments: Soil before samples are from UST removal; soil after results are from soil borings on 3116100 Water after <br /> results are from grab groundwater samples during bore hole construction. <br /> 1V. 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: 0 Number Decommissioned: 0 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> k <br /> V. Local Agency Representative Data <br /> Name: DONNA HERAN Title: DIRECTOR, ENVIRONMENTALHEALTH <br /> 5 <br /> Signature: Date- <br /> V1. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 08/23/00 Response Date: 09/20/00 <br /> i <br /> RB Staff: MARTY HARTZELL Response: Concurrence <br /> Title:; ASSOCIATE ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. i <br /> Minimal soil and groundwater contamination apparent. Well survey completed. Six wells identified within 2000 ft of site. <br /> The nearest wells are 1000 ft W, SW,S and E of the site. <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 />