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Sequoia Walnuttreek CA 94598 <br /> (925) <br /> 8 <br /> (925)988-%W <br /> Analytical FAX(915)988-9673 <br /> FAX <br /> sequoiatabs corn <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 05-Jul-01 07 40 <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 5030B PIT <br /> LCS Dup(IF22003-BSD1) Prepared 22-Jun-01 Analyzed 26-Jun-01 <br /> Benzene 1-5—3 0 10 mg/m3 Air 200 76 5 70-130 35 0 25 Q-0I <br /> Toluene 1 78 0 l0 2 00 890 70-130 21 I 25 <br /> Ethylbenzene 1 76 0 10 200 880 70-130 23 l 25 <br /> Xylenes(total) 574 0 to 600 95 7 70-130 l 8 9 25 <br /> Surrogate a a a-Tris luorotoluene 532 600 88 7 -0-130 <br /> • <br /> Sequoia 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 /> Page 5 of 6 <br />