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:7 Gettler-Ryan/Geostrategies(1) Project Unocal(4) <br /> 6747 Sierra Court,Suite J Project Number Former Unocal SS#285911665 Pacific Ave Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 06/21/01 12 03 <br /> Total Purgeable Hydrocarbons (C6-02),BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting Spice source %REC RPD <br /> Analyte <br /> Result Limit Units Level Result %REC LUMU RPD L.nnitNotes <br /> Batch 1060062-EPA 5030B(P <br /> Blank(1060062-BLK1) Prepared&Analyzed 06/15/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 1194 <br /> Benzene ND 0 50 " <br /> Toluene <br /> ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 , <br /> Methyl tert-butyl ether ND 5 0 <br /> Surrogate a a,a-Trii luorotoluene 799 100 799 70-130 <br /> LCS(1060062-BSI) Prepared&Ana1yzed 06/15/01 <br /> Benzene 800 050 ug/1 100 800 70-130 <br /> one 769 050 100 769 70-130 <br /> IW100 <br /> Ibenzene 7 87 050 78 7 70-130 <br /> Xylenes(total) 23 6 050 300 787 <br /> 70 130 <br /> Surrogate a ma-Trifluorotoluene 826 100 826 70-130 <br /> LCS(1060062-BS2) Prepared&Analyzed 06/15/01 <br /> Purgeable Hydrocarbons as Gasoline 282 50 119/1 250 113 70-130 <br /> Surrogate a aa-Tnfluorotoluene 915 100 915 70-130 <br /> Matrix Spike(1060062-MS1) Source L106064-03 Prepared 06/15/01 Analyzed 06/16/01 <br /> Purgeable Hydrocarbons as Gasoline 274 50 ug/1 250 ND 110 60-140 <br /> Surrogate a,a,a-Trifluororolvene <br /> 113 " 10 0 113 70-130 <br /> Matrix Spike Du (1060062-MSDI) Source L106064-03 Prepared 06/15/01 Analyzed 06/16/01 <br /> Purgeable Hydrocarbons as Gasoline 286 50 ugfl 250 ND 114 60-140 429 25 <br /> Surrogate a,a,a-Trifluorotoluene 113 " 100 113 70-130 <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> page 14 of 20 <br />