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404 N Wiget Lane <br /> l Sequoia Walnut Creek CA 600 <br /> (925)9$$-`-9 <br /> FAX(925?988-?673 <br /> a;1,, <br /> Analytical www sequolalabs com <br /> Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#6981 Reported <br /> Dublin CA,94568 Project Manager Scott Polston 09-Aug-01 10 34 <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 /> 6981-EFF(W107487-01)Air Sampled 26-Jul-01 12 18 Received 26-Jul-01 15 35 <br /> Purgeable Hydrocarbons ND 10 mg/m'Air 02 1G27002 27-Jul-01 27-Jul-01 DHS LUFT <br /> Benzene ND 010 <br /> Toluene ND 010 " <br /> i <br /> Ethylbenzene ND 010 <br /> Xylenes(total) ND 010 " <br /> Methyl tent-butyl ether ND 050 " <br /> Surrogate a a a-Trifluorotoluene 933% 70-130 <br /> i <br /> 6981-INF(W 107487-02)Air Sampled 26-Jul-01 12 20 Received 26-Jul-01 15 35 <br /> Purgeable Hydrocarbons ND 20 mg/m'Air 02 1G27002 27-Jul-01 27-Jul-01 DHS LUST <br /> Benzene ND 0 010 " <br /> Toluene ND 0 010 " <br /> Ethylbenzene ND 0 010 " <br /> Xylenes(total) ND 0 010 " <br /> gate a,a,a-Trifluorotoluene 77 7% 70-130 <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 2 of 6 <br />