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404 N Wtget Lane <br /> � Sequoia walnut Cree>s CA 94598 <br /> (925)988-9600 <br /> Analytical. FAX(916)988-9673 <br /> www se uoialabs cam <br /> ler Ryan,Inc -Dublin Project Unocal <br /> 7 Sierra Court Suite J Project Number Unocal#2859 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 07-Dec-01 08 14 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1 K27002-EPA 5030B PIT <br /> Matrix Spike(1K27002-MSI) Source W111381-02 Prepared 27-Nov-01 Analyzed 30-Nov-01 <br /> Benzene 170 0 50 ug/1 200 ND 85 70-130 <br /> Toluene 184 0 50 200 ND 92 70-130 <br /> Ethylbenzene 197 0 50 200 ND 98 70-130 <br /> Xylenes(total) 590 0 50 600 ND 98 70-130 <br /> Surrogate a,a a-Tri luorotoluene 302 300 101 70-130 <br /> Matrix Spike Du (IK27002-MSD]) Source W111381-02 Prepared 27-Nov-01 Analyzed 30-Nov-01 <br /> Benzene 171 050 ug/I 200 ND 86 70-130 06 20 <br /> Toluene 185 0 50 200 ND 92 70-130 0 5 20 <br /> Ethylbenzene 198 050 200 ND 99 70-130 0 5 20 <br /> Xylenes(total) 597 050 600 ND 100 70-130 1 20 <br /> Surrogate a a a-Tnfluorotoluene 299 300 100 70-130 <br /> ldbh 1K30003-EPA 5030B P/T `- - - <br /> Blank(IK30003-BLKI) Prepared&Analyzed 30-Nov-01 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ug/l <br /> Benzene ND 050 <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl Cert-butyl ether(MTBE) ND 25 " <br /> Surrogate a,a,a-Tris luorotoluene 367 300 122 70-130 <br /> LCS(IK30003-BSl) Prepared&Analyzed 30-Nov-01 <br /> Benzene 21 9 050 ug/l 200 110 70-130 <br /> Toluene 182 0 50 200 91 70-130 <br /> Ethylbenzene 193 050 200 92 70-130 <br /> Xylenes(total) 602 050 600 100 70-130 <br /> Surrogate a,a,a-Tri luorotoluene 298 300 99 70-130 <br /> la Analytical -Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> 36 of 19 <br />