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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-960096M <br /> FAX(925)988-%73 <br /> Analytical www sequoialabs Com <br /> Gettler Ryan Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#2859 Reported <br /> Dublin CA 94568 Project Manager Scott Polston 10-Jul-Ol 11 20 <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 F22003- EPA 50308 PIT <br /> LCS Dup(IF22003-BSDI) Prepared 22-Jun-01 Analyzed 26-Jun-01 <br /> Benzene 153 0 10 mgim'Air 200 765 70-130 35 0 25 Q-01 <br /> Toluene 1 78 0 10 200 89 0 70-130 211 25 <br /> Ethylbenzene l 76 0 10 200 880 70-130 231 25 <br /> Xylenes(total) 574 0 t0 600 957 70-130 189 25 <br /> Surrogate a a a-Trifluorotoluene 332 600 887 70-130 <br /> Sequoia Analytical- Walnut Creek The results in this report apply to the samples analyzed to accordance with the chain o <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 7 of 8 <br />