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Table 4 <br /> Historical Halogenated Volatile Organic Compound Groundwater Analytical Results <br /> Union Pacific Railroad Company <br /> Former Maintenance Facility,Tracy, California <br /> 2010/2011 Annual Groundwater Monitoring Report <br /> Cleaup Levels(WDR-9l 200 5 16.0 6.0 10 0.69 2.3 0.13 NA <br /> Cleanup Levels WDR-97-707° 200 5.0 0-06 6.0 6.0 10 0.7 5.0 0.015 NA <br /> cls-1,2- trans•i,2• Vinyl Total <br /> Wall ID Date Sam led 1•TCA 1,1-pCA 1,1-DCE Chloroethane DCE DCE PCE TCE Chloride HVOCs Notes <br /> j=Value estimated by laboralory,detected concentration below the laboratory practicai quantitation limit <br /> b=Compound detected in associated laboratory blank <br /> Data qualifiers(Quality Assurance Review of Sample Data Collected Before December 2006) <br /> J=Detected value considered estimated based on quality assurance review <br /> UJ=Compound not detected at an estimated value based on quality assurance review <br /> HVOC Abbreviations <br /> 1,1,1-TCA 1,1,1-Trichloroethane <br /> 1,1-DCA 1,1-Dthloroelhane <br /> 1,1-DCE 1,1-Dthloroethene <br /> cis-1,2-DCE cis-1,2-Dichloroethene <br /> trans-1,2-DCE trans-1,2-0ichloroelhene <br /> PCE Tetrachloroethene <br /> TCE Trichloroethene <br /> UP Tracy Annual Tables 1-5 2011.xlsx ARCADIS Page 11 of 11 <br />