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Entech Analytical labs, Inc, <br /> 3334 Victor Court • Santa Clara, CA 95054 - (408) 588-0200 • Fax (408) 588-0201 <br /> 40 Quality Control Results Summary <br /> QC Batch# WGC42098B Units. µg/L <br /> Matrix Liquid Date Analyzed 7/I9/01 <br /> Parameter Method Blank Spike Spike Sample Spike QC Type %Recovery RPD RPD Recovery <br /> Result Sample lD Amount Result Result Limits Limits <br /> Test TPH as Gasoline <br /> TPH as Gasoline EPA 8015 M 561 483 36 LCS 862 650 1350 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Tnfluoroto luene 103 65 - 135 <br /> Test BTEX <br /> Benzene EPA 8020 6 2 5 993 LCS 96 7 650-1350 <br /> Ethyl Benzene EPA 8020 78 7 626 LCS 978 650-1350 <br /> Toluene EPA 8020 35 8 35 019 LCS 97 8 650-1350 <br /> Xylenes,total EPA 8020 43 39 952 LCS 929 650 1350 <br /> F—Surrote Surrogate Recovery Control Limits(%) <br /> aaa-Tnflgauorotoluene 100 65 - 135 <br /> Test TPH as Gasoline <br /> TPH as Gasoline EPA 8015 M 561 45932 LCSD 81 9 5 10 2500 650 1350 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Tnfluorotoluene 99 65 - 135 <br /> Test BTEX <br /> Benzene EPA 8020 62 6 043 LCSD 975 0 83 2500 650-1350 <br /> Ethyl Benzene EPA 8020 78 7 061 LCSD 90 5 769 2500 650-1350 <br /> Toluene EPA 8020 358 33 97 LCSD 949 304 2500 650-1350 <br /> Xylenes,total EPA 8020 43 37 988 LCSD 893 504 2500 650-1350 <br /> 5urr)gate Surrogate Recovery Control Limits(%) <br /> aaa-Tnfluorotoluene 105 65 - 135 <br /> 40 <br /> Environmental Analysis Since 7983 <br />