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lEntech ALabs, Inc. <br /> 3334 Victor Court • Santa Clara, CA 95054 • (408) 588-0200 • Fax (408) 588-0201 <br /> Quality Control Results Summary <br /> QC Batch#: WMS21142 Units: gg(L <br /> Matrix: Liquid Date Analyzed: 8130/01 <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 19.6 LCS 98.0 79,4-112,2 <br /> Benzene EPA 8260B ND 20 21.2 LCS 106.0 90.9-124.5 <br /> Chlorobenzene EPA 8260B ND 20 20.4 LCS 102.0 88.5-110.6 <br /> Methyl-t-butyl Ether EPA 8260B ND 20 18.3 LCS 91.5 66.8-128.0 <br /> Toluene EPA 8260B ND 20 20.0 LCS 100.0 89.9-116.0 <br /> Trichloroethene EPA 8260B ND 20 21.3 LCS 106.5 81.7-137.3 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> 4-Bromofluorobenzene 98 65 - 135 <br /> Dibromofluoromethane 100 57 - 139 <br /> Toluene-d8 98 65 135 <br /> Test: EPA 8260B <br /> ' ],l-Dichloroethene EPA 8260B ND 20 19.3 LCSD 96.5 1.54 25.00 79.4-112.2 <br /> Benzene EPA 82608 ND 20 21.0 LCSD 105.0 0.95 25.00 90.9-124,5 <br /> Chlorobenzene EPA 8260E ND 20 20 LCSD 100.0 1.98 25.00 88,5-110,6 <br /> Methyi-t-butyl Ether EPA 8260B ND 20 18.8 LCSD 94.0 2.70 25.00 66.8-128.0 <br /> Toluene EPA 8260B ND 20 19.5 LCSD 97.5 2.53 25.00 89.9-116.0. <br /> Trichloroethene EPA 8260B ND 20 21.2 LCSD 106.0 0.47 25.00 81.7-137.3 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> 4-Bromotluorobenzene 100 65 - 135 <br /> Dibromofluoromethane 103 57 - 139 <br /> Toluene-d8 97 65 - 135 <br /> Environmental Analysis Since 1983 <br />