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lEntcch 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 #: WGC42138 Units: µg/L <br /> Matrix: Liquid Date Analyzed: 8/27/01 <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: TPH as Gasoline <br /> TPH as Gasoline EPA 8015 M ND 561 481.23 LCS 85.8 59.2-111.9 <br /> [_-7 <br /> 1� Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Tdfluorotoluene 103 65 - 135 <br /> Test: BTEX <br /> i <br /> Benzene EPA 8020 ND 6.2 6.275 LCS 101.2 65.0-135.0 <br /> i <br /> Ethyl Benzene EPA 8020 ND 7.8 7.613 LCS 97.6 65.0-135.0 <br /> Toluene EPA 8020 ND 35.8 35.431 LCS 99.0 65,0-135.0 <br /> Xylenes,total EPA 8020 ND 43 39.786 LCS 92.5 65.0-135.0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Trifluorotoluene 104 65 - 135 <br /> Test: MTBE by EPA 8020 <br /> Methyl-t-butyl Ether EPA 8020 ND 52.8 47.306 LCS 89.6 65,0-135.0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Trifluorotoluene 104 65 - 135 <br /> Test: TPH as Gasoline <br /> TPH as Gasoline EPA 8015 M ND 561 478.91 LCSD 85.4 0.48 25.00 59.2-111.9 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> ' aaa-Trifluorotoluene 101 65 - 135 <br /> Test: BTEX <br /> Benzene EPA 8020 ND 6.2 5.913 LCSD 95.4 5.94 25.00 65.0-135.0 <br /> ' Ethyl Benzene EPA 8020 ND 7.8 7.512 LCSD 96.3 1.34 25.00 65.0-135.0 <br /> Toluene EPA 8020 ND 35.8 35.664 LCSD 99.6 0.66 25.00 65.0-135.0 <br /> Xylenes,total EPA 8020 ND 43 39.885 LCSD 92.8 0.25 25.00 65.0-135.0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Trifluorotoluene 100 65 - 135 <br /> Test: MTBE by EPA 8020 <br /> Methyl-t-butyl Ether EPA 8020 ND 52.8 45.61 LCSD 86.4 3.65 25.00 65.0-135.0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Trifluorotoluene 100 65 - 135 <br /> Environmental Analysis Since 1983 <br />