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Entech Analytical labs, Inc. <br /> 3334 Victor Court • Santa Clara, CA 95054 e (408) 588-0200 • Fax (408) 588-0201 <br /> Quality Control Results Summary <br /> QC Batch#: WGC42027 Units: µg/L <br /> Matrix: Liquid Date Analyzed: 5/27/2001 <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 561 440.5 LCS 78.5 65,0-135.0 <br /> Surrogate Surrogate Recovery Control Limits{%) <br /> ' aaa-Trifluorotoluene 103 65 - 135 <br /> Test: BTEX <br /> Benzene EPA 8020 ND 6.2 5.67 LCS 91.5 65.0-135.0 <br /> ' Ethyl Benzene EPA 8020 ND 7.8 6.81 LCS 87.3 65.0-135.0 <br /> Toluene EPA 8020 ND 35.8 32.1 LCS 89.7 05.0-135.0 <br /> Xylenes,total EPA 8020 ND 43 36.1 LCS 84.0 65.0-133.0 <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 58.7 LCS 111.2 65.0-135.0 <br /> Test: TPH as Gasoline <br /> TPH as Gasoline EPA 8015 M ND 561 432.6 LCSD 77.1 1.81 25.00 65.0-135.0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Trifluorotoluene 104 65 - 135 <br /> Test: BT <br /> -EX <br /> Benzene EPA 8020 ND 6.2 5.61 LCSD 90.5 3.33 25.00 65,0-135.0 <br /> Ethyl Benzene EPA 8020 ND 7.8 6.89 LCSD 88.3 1.31 25.00 65.0-135.0 <br /> Toluene EPA 8020 ND 35.8 32.7 LCSD 91.3 1.23 25.00 65.0-135.0 <br /> Xylenes,total EPA 8020 ND 43 36.6 LCSD 85.1 1.38 25.00 65.0-135,0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Trifluorotoluene 102 65 - 135 <br /> Test: MTBE by EPA 8020 <br /> Methyl-t-butyl Ether EPA 8020 ND 52.8 45.3 LCSD 85.8 25.77 25.00 65.0-135,0 <br /> Notes: The MTBE by EPA 8020 in the LCS/LCSD is outside of the laboratory control limits for%RPD but within the <br /> ' laboratory control limits for%Recovery. No corrective action required. <br /> Environmental Analysis Since 1983 <br />