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1551 Industrial Road <br /> Sequoia San Carlos CA� 0 <br /> 960-h-��-i' (650)232 9G04 <br /> FAX(650)232 9612 <br /> Analytical www sequoialabs com <br /> Ib <br /> ler-Ryan/Geostrategies(I) Project Tosco(17 Sierra Court, Suite J Project Number Tosco(Former BP)SS#11192, Stockton Reported <br /> lm CA,94568 Project Manager Deanna Harding 11/21/01 13 29 <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 Lunits RPD Limit Notes <br /> Batch 1110066-EPA 5030B (P/T) <br /> Blank(1110066-BLKI) Prepared&Analyzed 11/16/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Sin+ogate a a a-Tri luorotoluene 957 100 957 70-130 <br /> LCS (l 110066-BSI) Prepared&Analyzed 11/16/01 <br /> Benzene 852 050 ug/l 100 85 2 70-130 <br /> Toluene 829 050 ]Go 82 9 70-130 <br /> Ethylbenzene 848 050 100 848 70-130 <br /> 19C.ties(total) 25 2 050 " 300 84 0 70-130 <br /> gate a a,a-Triuorotoluene 939 100 939 70-130 <br /> LCS(1110066-BS2) Prepared&Analyzed I II16101 <br /> Purgeable Hydrocarbons as Gasoline 205 50 ug/l 250 920 70-130 <br /> Surrogate a a,a-Trifluoroioluene 983 100 983 70-130 <br /> Matrix Spike(1110066-MSI) Source L111078-10 Prepared&Analyzed 11/16/01 <br /> Benzene 799 050 ug/l 100 ND 799 60-140 <br /> Toluene 799 050 100 ND 799 60-140 <br /> Ethylbenzene 831 050 too ND 83 1 60-140 <br /> ILIWI(total) 247 050 300 ND 823 60-140 <br /> Surrogate a a,a-Triuorotoluene 947 100 94 7 70-130 <br /> Matrix Spike Dup(1110066-MSD1) Source L111078-10 Prepared&Analyzed 11/16/01 <br /> Benzene 927 050 ug/l 100 ND 92 7 60-140 148 25 <br /> Toluene 938 050 100 ND 93 8 60-140 16 0 25 <br /> Ethylbenzene 967 050 100 ND 967 60-140 15 1 25 <br /> Xylenes(total) 288 0 50 300 ND 960 60-140 15 3 25 <br /> Surrogate a,a a-Triuororoluene 961 100 961 70-130 <br /> is Analytical - San Carlos The results in this report apply to the samples anal)-zed in accordance with the chain of <br /> cusiody document This analytical report must be reproduced m its entirety <br /> Page 1 l of 19 <br />