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Etch Analyticaln e 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#: SMS2010419 Units: µg/Kg <br /> Matrix: Solid Date Analyzed: 4/19101 <br /> Parameter Method Blank Spike Spike Sample Spike QC Type %Recovery RPD Limits <br /> Recovery <br /> Result Sample ID Amount Result Result <br /> Test: Oxygenates by EPA 8260B 43.0-155.0 <br /> I,1-Dichloroethene EPA 8260B 50 49.2 LCS 98.4 <br /> Benzene EPA 8260B 50 52.6 LCS 105.2 43.0-151.0 <br /> Chlorobenzene EPA 8260B 50 46.8 LCS 93.6 35,0-153.0 <br /> Methyl-t-butyl Ether EFA 8260E ND 50 53.9 LCS 107.8 75.0-147.0 <br /> Toluene EPA 8260B 50 49.3 LCS 98.6 67.0-114.0 <br /> Trichloroethene EPA 8260E 50 51.0 LCS 102.0 48.0-151.0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> 4-Bromofluorobenzene 105 56 - 131 <br /> Dibromofluoromethane 117 65 - 135 <br /> Toluene-d8 102 65 - 135 <br /> Test: Oxygenates by EPA 8260B <br /> I,]-Dichloroethene EPA 82608 50 48.8 LCSD 97.6 4.82 43.0-155.0 <br /> 50 52.4 LCSD 104.8 0.38 43.0-151.0 <br /> Benzene EPA 8260E <br /> Chlorobenzene EPA 8260E 50 48.2 LCSD 96.4 2.95 35.0-153.0 <br /> ethyl-t-butyl Ether EPA 8260E ND 50 50.4 LCSD 100.8 6.71 75.0-.147.0 <br /> 50 50.4 LCSD 100.8 2.21 67.0-114.0 <br /> Toluene EFA 8260B <br /> Trichloroethene EPA 8260B 50 51.8 LCSD 103.6 1.56 48.0-151.0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> 4-Bromofluorobenzene 103 56 - 131 <br /> Dibromofluoromethane 110 65 - 135 <br /> Toluene-d8 102 65 - 135 <br /> 0 <br /> Environmental Analysis Since 1983 <br />