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• 819 SnAve Ste 8 <br /> a— ) Sequo><a Sacrameentoto CA 95834 <br /> (916)921 oo <br /> Analytical <br /> FAX(916)921-011 00 <br /> www sequoislabs com 4 <br /> Gettler-Ryan-Dublin Pr4lect Former Unocal 2859,Stockton,CA a S211346 <br /> 6747 Sterna Court,Ste 3 Project Number N/A, Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/04/02 14 47 <br /> 1 1 1 t I — t <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2110317-EPA 5030B (P/T) <br /> Blank(2110317-BLKI) _ - Prepared& Analyzed 11/20/02 ~ <br /> Ethylbenzene ND 050 ug/l <br /> Xylenes(total) ND 050 " <br /> Methyl teri-butyl ether ND 25 " <br /> Surrogate a a a-Trilluoroioluene 948 100 95 60-140 <br /> Blank(2110317-BLK2) ` Prepared&'Analyzed 11/21/02 <br /> Purgeable hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 0 50 - <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether - ND 2 5 <br /> Surrogate a a a-Trilluorotoluene 935 100 94 60-140 <br /> Blank(2110317_BLK3) _ Prepared& Anaalyzed 11/22/02 <br /> Purgeable Hydrocarbons ND"' 50—ug/l - -- <br /> Benzene ND 0 50 " <br /> Toluene -- -- - -ND=-,--050-�- ---- - ----- --=-- ------- <br /> Ethylbenzene ND_ 0 50 " <br /> Xylenes(total) ND _ 050 " <br /> Methyl ten-butyl ether ND 2 5 " <br /> Surrogate a a a-Tri luorotoluene 853 100 85 60-140 <br /> Laboratory Control Sample(2110317-BSI) Prepared& Analyzed 11/20/02 <br /> Benzene 942 050 ug/l 100 94 70-130 <br /> Toluene 980 0 50 100 98 70-130 <br /> Ethylbenzene 9 64 0 50 10 0 96 70-130 <br /> Xylenes(total) 28 3 050 300 94 70-130 <br /> Methyl tert-butyl ether 1 1 6 2 5 100 116 70-130 <br /> Surrogate a a a-TriJluorotoluene 883 100 88 60 140 <br /> Sequoia Analytical -Sacramento The results in this i epoi t apply to the samples onalyzed in accordance with the chain o <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 17 of 22 <br />