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• <br /> Gettler-Ryan/Geostrategies(I) Proieet Tosco(1) <br /> 6747 Sierra Court,Suite J Prgleci Number Unocal Circle K SS##1205,Lathrop,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 08/03/01 13 39 <br /> Total Purgeable Hydrocarbon-(C&C12) by EPA 8015M and BTEX/MTBE by EPA 8021B - Quality Control - <br /> Sequoia Analytical - San Carlos <br /> Reporimg Spike Source %REC RPD <br /> Analyte Result Luau Units level Result %Mc Lrmrts RPD Lmut Notes <br /> Batch 1080001 -EPA 5030B (PIT) _ <br /> Blank(1080001-BLKI) Prepared&Analyzed 08/01/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethvlbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 ' <br /> Methyl tert-butyl ether ND 5 0 " <br /> Surrogate a a a-Triuorotoluene 762 100 76 2 70-130 <br /> LCS(1080001-BSI) Prepared&Analyzed 08/01/01 <br /> Benzene 835 050 ug/1 100 83 5 70-130 <br /> Toluene 807 050 too 80 7 70-130 <br /> Ethylbenzene 8 11 050 100 81 1 70-130 <br /> Xylenes(total) 24 4 050 " 300 81 3 70-130 <br /> Surrogate a a a-Tri luorotoluene 811 100 812 70-130 <br /> LCS()080001-BS2) Prepared&Analyzed 08/01/01 <br /> Purgeable Hydrocarbons as Gasoline 249 50 ug/l 250 99 6 70-130 <br /> Surrogate a a a-Trifluorotoluene 919 100 929 70-130 <br /> Matrix Spike(1080001-MSI) Source L707169-06 Prepared 08/01/01 Analyzed 08/02/01 <br /> Benzene 804 050 ugtl 10 0 ND 804 60-140 <br /> Toluene 7 87 0 50 100 ND 78 7 60-140 <br /> Etbylbenzene 7 84 0 50 too ND 78 4 60-140 <br /> Xylenes(total) 24 3 050 300 ND 81 0 60-140 <br /> Surrogate a a a-Trifluorotoluene 848 F, 100 848 70-130 " <br /> Matrix Spike Dup(1080001-MSD1) Source L107169-06 Prepared 08/01/01 Analyzed 08/02/01 <br /> Benzene 832 0 50 ug/l 100 ND 83 2 60-140 342 25 <br /> Toluene 805 0 50 100 ND 805 60-140 226 25 <br /> Ethylbcnzene 8 37 050 10 0 ND 83 7 60-140 654 25 <br /> Xylenes(total) 25 6 050 300 ND 85 3 60-140 5 21 25 <br /> Surrogate a a a-Trifluorotoluene 899 " 100 89 9 70-130 <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chaqp <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 9 of 14 <br />