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Entech Analytical Labs, Inc. <br /> 3334 VlCtor Court • Santa Clara, California 95054 <br /> 800/287-1799 . 408/588-0200 • FAX 408/588-0201 <br /> Quality Control Results Summary <br /> QC Batch# SGC4001130 Units mg/Kg <br /> Matrix Solid Date Analyzed 11/30/00 <br /> Parameter Method Method Spike ,•Spike Sample Spike QC Type %Recovery RPD "•IRPD Recovery <br /> Blank Sample ID Amount Result Result Limits Limits <br /> Test TPH as Gasoline <br /> TPH as Gasoline EPA 8015 M ND 0 469 0 503 LCS 1072 75 0- 125 0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Trifluorotomene 102 65 - 135 <br /> I <br /> Test BTEX <br /> Benzene EPA 8020 ND 00052 0 005 LCS 962 750- 125 0 <br /> Ethyl Benzene EPA 8020 ND 00056 0 006 LCS 1071 750- 1250 <br /> Toluene EPA 8020 ND 0 029 0 027 LCS 93 1 75 0- 125 0 <br /> Xylenes,total EPA 8020 ND 0 032 0 030 LCS 93 8 750- 125 0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Trifluorotoluene 95 65 - 135 <br /> Test TPH as Gasoline <br /> TPH as Gasoline EPA 8015 M ND 0 469 0 505 LCSD 1077 040 2500 750- 125 0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Trifluorotoluene 103 65 - 135 <br /> Test BTEX <br /> Benzene EPA 8020 ND 00052 0 005 LCSD 962 000 2500 75 0- 125 0 <br /> Ethyl Benzene EPA 8020 ND 00056 0 005 LCSD 893 18 18 25 00 750- 125 0 <br /> Toluene EPA 8020 ND 0 029 0 028 LCSD 966 3 64 25 00 75 0- 12�0 <br /> Xylenes total EPA 8020 ND 0 032 0 030 LCSD 938 000 25 00 75 0- 125 0 <br /> Surrogate Surrogate Recovery Control Limits(%) <br /> aaa-Trifluorotoluene 104 65 - 135 <br /> I <br />