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1551 lnduvrial Road <br /> Sequoia San Carlos CA 94070 <br /> a- )w Analytical (650) <br /> FAX(650)232 9612 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategies(I Project Tosco(]) <br /> 6747 Sierra Court. Suite 3 Project Number Tosco(Former BP)SS##11 192 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 1]121101 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 Limits RPD Limit Notes <br /> Batch 1110072 - EPA 5030B(P/T) <br /> Blank(1710072-BLK1) Prepared&Analyzed 11/19/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 u8/1 <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 a a a-Trifluorotoluene 949 100 949 70-130 <br /> I CS(1110072-BSI) , Prepared&Analyzed 11/19/01 <br /> Benzene 966 050 ugA 100 966 70-130 <br /> Toluene 9 53 050 100 95 3 70-130 <br /> Ethylbenzene 960 050 " ' 100 96 0 70-130 <br /> Xylenes(total) 283 050 300 943 70-130 <br /> Surrogate a a a-Trsuorotoluene 10 6 JOG 106 70-130 <br /> LCS(I l 10072-BS2) Prepared&Analyzed 11/19/01 <br /> Purgeable Hydrocarbons as Gasoline 241 50 ug/I 250 964 70-130 <br /> Surrogate a,a,o-Trifluorotoluene 956 11 100 95 6 70-130 <br /> Matrix Spike(III 0072-MSI) Source Ll I I063-08 Prepared&Analyzed 11/19/01 <br /> Purgeable Hydrocarbons as Gasoline 236 50 ug/I 250 ND 94 4 60-140 <br /> Surrogate a a a-Trifluorololuene 102 11 100 102 70-130 <br /> Matrix Spike Dup(I I 10072-MSDI) Source L111063-08 Prepared&_Analyzed 11/19/01 <br /> Purgeable Hydrocarbons as Gasoline 235 50 ug/l 250 ND 94 0 60-140 0425 25 <br /> Surrogate a,a a-Triuorotoluene 108 100 108 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 12 of 19 <br />