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• 1551IndustrialRoad <br /> 4D— Sequoia San Carlos CA 94070 <br /> Analytical (654)232-9600 <br /> FAX(650)232 9612 <br /> www sequoialabs fpm <br /> Gettler-Ryan/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court, Suite J Prcjcct Number Tosco#01205 (Circle K),Lathrop Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 01/11/02 09 26 <br /> Total Purgeable Hydrocarbon (C6-C12) 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 2050018- EPA 5030B(P/T) <br /> Blank(2050018-BLK1) Prepared& Analyzed 05/09/02 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl Leri-butyl ether ND 50 <br /> Surrogate a a a-Trilluorotoluene 942 100 941 70-130 <br /> LCS(2050018-BSI) Prepared&Analyzed 05/09/02 <br /> Benzene 8 62 050 ugA 10 0 862 70-130 <br /> Toluene 9 O1 050 100 901 70-130 <br /> Ethylbenzene 974 050 too 97 4 70-130 <br /> Xylenes(total) 295 050 300 98 3 70-130 <br /> Surrogate a a a-Trilluorofoluene 931 100 931 70-130 <br /> LC (2050018-BS2) Prepared&Analyzed 05/09/02 <br /> Purgeable Hydrocarbons as Gasoline 235 50 ug/1 250 940 70-130 <br /> Surrogate a a a-Trifluorotoluene 974 100 974 70-130 <br /> Matrix Spike(2050018-MSI) Source L204132-03 Prepared&Analyzed 05/09/02 <br /> Benzene 104 050 ug/l 100 078 962 60-140 <br /> Toluene 897 050 100 ND 897 60-140 <br /> Ethylbenzene 102 050 100 ND 102 60-140 <br /> Xylenes(total) 304 050 300 ND 101 60-140 <br /> Surrogate a a a-Tnlluoi otoluene 883 100 883 70-130 <br /> Matrix Spike Dup(20500188-MSDI) W Source L204132-03 Prepared&Analyzed 05/09/02 <br /> Benzene 104 030 ug,/l too 078 962 60-140 0 00 25 <br /> Toluene 9 04 050 100 ND 904 60-140 0 777 25 <br /> Ethylbenzene 103 050 t 0 0 ND 103 60-140 0 976 25 <br /> Xylenes(total) 307 050 300 ND 102 60-140 0 982 25 <br /> Surrogate a a a-Trilluorotoluene 8 80 100 880 70-130 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 9 of 14 <br />