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IndusT <br /> Sequoia 1551 Carlos <br /> C al Road <br /> San Carlos 94070 <br /> 23 <br /> Analytical 2-9600 <br /> FAX(650)232-9612 <br /> www sequoialabs <br /> 23equoialabs win <br /> Gettler-Ryan/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court, Suite J Project Number Tosco(Unocal)SS#16981,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 12/27/01 090:3:9:t <br /> Total Purgeable Hydrocarbon_(C6-02) by EPA 8015M and BTEX/MTBE by EPA 8021B - Quality Control_ <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1120080-EPA 5030B (PIT) - <br /> Blank(1120080-BLK1) Prepared&Analyzed 12/20/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 50 " <br /> Surrogate aaa-Triuorotoluene 104 100 104 70-130 <br /> LCS(1120080-BSI) Prepared&Analyzed 12/20/01 <br /> Benzene 985 050 ug/l 100 985 70-130 <br /> Toluene 893 050 100 893 70-130 <br /> 1 ihylbenzene 863 050 " 100 863 70-130 <br /> Xylenes(total) 256 050 n300 853 70-130 <br /> Surrogate o a,a-Trifluorotoluene 102 100 101 70-130 <br /> LCS(1120080-BS2) Prepared&Analyzed 12/20/01 <br /> Purgeable Hydrocarbons as Gasoline 274 50 ug/1 250 110 70-130 <br /> Surrogate a a a-Triuorotoluene 975 " 100 975 70-130 <br /> Matrix Spike(1120080-MSI) Source LI 12085-13 Prepared&Analyzed 12/20/01 <br /> Purgeable Hydrocarbons as Gasoline 529 50 ug/l 250 240 116 60-140 <br /> Surrogate a a a-Triuorotoluene 106 11100 106 70-130 <br /> Matrix Spike Dup(1120080-MSD1) Source L112085-13 Prepared&Analyzed 12/20/01 <br /> Purgeable Hydrocarbons as Gasoline 538 50 ug/1 250 240 119 60-140 169 25 <br /> Surrogate aaa-TrJ7uorotoluene 108 100 108 70-130 <br /> Sequoia Analytical -San Carlos The results in this report apply to the samples analyzed in accordance with the chatn o <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 15 of 22 <br />