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En.tech 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#: SMS21018 Units: µg/Kg <br /> Matrix: Solid Date Analyzed: 5/17/01 <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 8260E <br /> 1,1-Dichloroethene EPA 8260B ND 50 48.3 LCS 96.6 42.7-155.0 <br /> Benzene EPA 8260B ND 50 54.3 LCS 108.6 43.1 -151.0 <br /> Chlorobenzene EPA 82608 ND 50 51.6 LCS 103.2 34.7-152.8 <br /> Methyl-t-butyl Ether EPA 8260B ND 50 49.6 LCS 99.2 74.6-146.9 <br /> Toluene EPA 8260B ND 50 54.8 LCS 109.6 66.9-113.8 <br /> Trichloroethene EPA 8260B ND 50 52.3 LCS 104.6 47.7-150.5 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> 4-Bromofluorobenzene 95 56 131 <br /> Dibromofluoromethane 92 55 - 156 <br /> Toluene-d8 94 65 - 141 <br /> Test: EPA 8260B <br /> I,1-Dichloroethene EPA 8260B ND 50 46.0 LCSD 92.0 4.88 25.00 42.7-155.0 <br /> Benzene EPA 8260B ND 50 52.6 LCSD 105.2 3.18 25.00 43.1 -151.0 <br /> lorobenzene EPA 82608 ND 50 50.5 LCSD 101.0 2.15 25.00 34.7-152.8 <br /> thyl-t-butyl Ether EPA 8260B ND 50 44.7 LCSD 89.4 10.39 25.00 74.6-146.8 <br /> Toluene EPA 82603 ND 50 51.5 LCSD 103.0 6.21 25.00 66.9-113.8 <br /> Trichloroethene EPA 8260E ND 50 50.3 LCSD 100.6 3.90 25.00 47.7-150.5 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> 4-Bromofluorobenzene 92 56 131 <br /> Dibromofluoromethane 90 55 - 156 <br /> Toluene-d8 93 65 - 141 <br /> Environmental Analysis Since 1983 <br />