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Entech Analytical Labs, Inc. <br /> �i 3334 Victor Court • Santa Clara, CA 95054 • (408) 588-0200 • Fax (408) 588-0201 <br /> Quality Control Results Summary <br /> QC Batch#: WMSI 1121A Units: µglL <br /> Matrix: Liquid Date Analyzed: 8/13/01 <br />. ' Parameter Method Blank Spike Spike Sample Spike QC Type %Recovery RPD RPD Recovery <br /> Result Sample 1D Antount Result Result Limits Limits <br /> Test: Oxygenates by EPA 8260B <br /> ' <br /> Methyl-t-butyl Ether EPA 826013 ND – _— 20 – _ 16.8 LCS —Y ` 84.0 _ 65.0- 135.0 <br /> Surrogate Surrogate Recovery Control Limits("/„) <br /> 4-Bromofluorobenzene 79 65 - 135 <br /> Dibromolluoromethane 9I 57 - 139 <br /> ' I TolueneA8 103 65 - 135 I <br /> Test: Oxygenates by EPA 8260B <br /> Mcthyl-t-butyl Ether EPA 82608 ND 20 18.9 LCSD 94.5 11.76 25.00 65.0- 135.0 <br /> % <br /> Surrogate Surrogate Recovery Control Limits(' ,) — — <br /> 4-aromolluorobenzene 82 Cry - 135 <br /> Dibromoiluoromethane 94 57 - 139 <br /> Toluene-d8 _ 103 65 = 135 <br /> 1 <br /> 1 <br /> Y <br />' Environmental Analysis Since 1983 <br />