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'1 Entech Analytical Labs, Inc. <br /> 3334 Victor Court * Santa Clara, CA 95054 + (408) 588-0200 • Fax (408) 588-0201 <br /> Quality Control Results Summary <br /> QC Batch#: WMS21083 Units: µg/L <br /> Matrix: Liquid Date Analyzed: 7/2/01 <br /> Parameter Method Blank Spike Spike Sample Spike QC Type %Recovery RPD RPD Recovery <br /> Result Sample 1D Amount Result Result Limits Limits <br /> Test: EPA 8260B <br /> 1,1-Dichloroethene EPA 8260B ND 20 18.2 LCS 91.0 65.0-135.0 <br /> Benzene EPA 8260E ND 20 21.2 LCS 106.0 65.0-135.0 <br /> Chlorobenzene EPA 8260B ND 20 20.1 LCS 100.5 65.0-135.0 <br /> Methyl-t-butyl Ether EPA 8260B ND 20 19.7 LCS 98.5 65.0-135.0 <br /> Toluene EPA 8260B ND 20 20.5 LCS 102.5 65.0-135.0 <br /> Trichloroethene EPA 8260B ND 20 21.5 LCS 107.5 65.0-135.0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> 4-Bromofluorobenzene 107 65 - 135 <br /> ' Dibromotluoromethane 86 57 - 139 <br /> Toluene-d8 79 65 - 135 <br /> Test: EPA 8260B <br /> I,1-Dichloroethene EPA 8260B ND 20 18.1 LCSD 90.5 0.55 25.00 65.0-135.0 <br /> Benzene EPA 8260B ND 20 20.8 LCSD 104.0 1.90 25.00 65.0-135.0 <br /> Chlorobenzene EPA 8260E ND 20 19.5 LCSD 97.5 3.03 25.00 65.0-135.0 <br /> Methyl-t-butyl Ether EPA 826011 ND 20 19.6 LCSD 98.0 0.51 25.00 65.0-135.0 <br /> Toluene EPA 8260B ND 20 20.1 LCSD 100.5 1.97 25.00 65.0-135.0 <br /> Trichloroethene EPA 8260B ND 20 21.6 LCSD 108.0 0.46 25.00 65.0-135.0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> 4-Bromotluorobenzene 109 65 135 <br /> Dibromotluoromethane 88 57 - 139 <br /> Toluene-d8 79 65 135 <br /> i <br /> �i <br /> r <br /> Environmental Analysis Since 1983 <br />