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.. 'Entech 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# WMS31103 Units }tg/L <br /> Matrix Liquid Date Analyzed 7/20/01 <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 Oxygenates by EPA 8260B <br /> Methyl-t-butyl Ether EPA 8260B ND 20 173 LCS 865 650-1350 <br /> Surrogate Surrogate Recovery Control Limits(%} <br /> 4-Bromofluorobenzene 89 65 - 135 <br /> Dibromofluoromethane 99 57 - 139 <br /> Toluene-0 123 65 - 135 <br /> Test Oxygenates by EPA 8260B <br /> Methyl-t-butyl Ether EPA 82608 ND 20 173 LCSD 86 5 000 2500 650- 1350 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> 4-Bromofluorobenzene 89 65 - 135 <br /> Dibromofluoromethane 97 57 - 139 <br /> Toluene-d8 122 65 - 135 <br /> i <br /> • <br /> Environmental Analysis Since 7983 <br />