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Entech Analytical Labs, Inc. <br /> 40 3334 Victor Court • Santa Clara, CA 95054 • (408) 588-0200 • Fax (408) 588-0201 <br /> Quality Control Results Summary <br /> QC Batch#: SMS1010320 Units: µg/Kg <br /> Matrix: Solid Date Analyzed: 3/20/01 <br /> Parameter Method Blank Spike Spike Sample Spike QC Type %Recovery RPD RPD Recovery <br /> Result Sample ID Amount Result Result Limits Limits <br /> Test: EPA 8260B <br /> 1,1-Dichloroethene EPA 8260B ND 20 17.4 LCS 87.0 65.0-135,0 <br /> Benzene EPA 8260B ND 20 20 LCS 100.0 65.0-135.0 <br /> Chlorobenzene EPA 8260B ND 20 23.16 LCS 115.8 65.0-135.O <br /> Methyl-t-butyl Ether EPA 8260B ND 20 20.4 LCS 102.0 63.0-135.0 <br /> Toluene EPA 8260B ND 20 22.92 LCS 114.6 65.0-135.0 <br /> Trichloroethene EPA 8260B ND 20 21.18 LCS 105.9 65,0-135.0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> 4-Bromofluorobenzene 96 56 - 131 <br /> Dibromofluoromethane 86 55 - 156 <br /> Toluene-d8 94 65 - 141 <br /> Test: EPA 8260B <br /> 1,1-Dichloroethene EPA 8260B ND 20 18.54 LCSD 92.7 6.34 30.00 65.0-135.0 <br /> Benzene EPA 8260B ND 20 21.87 LCSD 109.4 8.93 30.00 65,0- 135,0 <br /> Chlorobenzene EPA 8260B ND 20 25.56 LCSD 127.8 9.85 30.00 65.0- 135.0 <br /> ethyl-t-butyl Ether EPA 8260B ND 20 22.77 LCSD 113.8 10.98 30.00 63.0-135.0 <br /> luene EPA 8260B ND 20 25.12 LCSD 125.6 9.16 30.00 65.0-135.0 <br /> Trichloroethene EPA 8260B ND 20 23.26 LCSD 116.3 9.36 30.00 65.0-135.0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> 4-Bromofluorobenzene 96 56 - 131 <br /> Dibromofluoromethane 87 55 - 156 <br /> Toluene-d8 95 65 - 141 <br /> Environmental Analysis Since 1983 <br />