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` 404 N Wlget Lane <br /> Sequoia Walnut Creek 094598 <br /> (925)9888-9600 <br /> FAX(925)988-9673 <br /> �,,,� Analytical www sequoialabs corn <br /> 7Dubhn <br /> ttler Ryan Inc -Dublin Project Tosco <br /> 7 Sierra Court Suite 7 Project Number Tosco#6981 Reported <br /> CA 94568 Project Manager Scott Polston 06-Oct-00 09 38 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> Influent(W009480-02)Air Sampled 20-Sep-00 12 10 Received 20-Sep-0015 03 P-01 <br /> Purgeable Hydrocarbons 240 50 mg/m3 Air 1 0121004 2l-Sep-00 21-Sep 00 DHS LUFT <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene 085 050 " <br /> Xylenes(total) 0 75 0 50 " <br /> Methyl tert-butyl ether 9 3 25 CC 3 <br /> Surrogate a a,a-Trifluorotoluene 820% 70-130 <br /> I <br /> I <br /> I <br /> I <br /> i <br /> I <br /> I <br /> i <br /> uoia Analytical-Walnut CIeek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Tits analytical report must be reproduced in ets entirety <br /> Page 2 of 7 <br />