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404 N Wiget Lane <br /> Sequoia Walnut Creek CA <br /> 94598 <br /> (925)988-9600-%00 <br /> FAX(925)988-9673 <br /> Analytical www sequoialabs corn <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosca# 11194 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 14-Aug-01 08 33 <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 /> OSS-W(W708077-01)Water Sampled 03-Aug-01 00 00 Received 03-Aug-01 17 00 <br /> Purgeable Hydrocarbons ND 50 ugA 1 1H06003 06-Aug-01 07-Aug-01 EPA <br /> 8015M/8020 <br /> Benzene ND 050 Q-23b <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) 081 050 " <br /> Surrogate a a a-Tris luorotoluene 94 7% 70-130 " <br /> OBS-W(W108077-01RE1)Water Sampled 03-Aug-010000 Received 03-Aug-011700 <br /> Methyl tert-butyl ether 940 25 ugA to IH06003 07-Aug-01 07-Aug-01 EPA Q-23 <br /> 80I SW8020 <br /> Surrogate a,a,a-Trifluorotoluene 106% 70-130_bLW " <br /> -2(W108077-02)Water Sampled 03-Aug-01 00 00 Received 03-Aug-01 17 00 <br /> qw eable Hydrocarbons ND 200 ugA 4 1HO6003 06-Aug-01 07-Aug-01 EPA <br /> 8015M/8020 <br /> Benzene 74 2 0 " Q-23b <br /> Toluene ND 2 0 <br /> Ethylbenzene ND 2 0 " <br /> Xylenes(total) ND 2 0 " <br /> Surrogate a,a,a-Trifluorotoluene 973% 70-130 " <br /> MW-2(W108077-02RE1)Water Sampled 03-Aug-01 00 00 Received 03-Aug-01 17 00 <br /> Methyl tert-butyl ether 1200 250 ug/1 100 1H06003 07-Aug-01 07-Aug-01 EPA Q-23a <br /> 8015M/8020 <br /> Surrogate a a a-Trifluorotoluene 930% 70-130 " <br /> MW-3(W108077-03)Water Sampled 03-Aug-01 00 00 Received 03-Aug-01 17 00 <br /> Purgeable Hydrocarbons ND 50 ugA 1 1H06003 06-Aug-01 07-Aug-01 EPA <br /> 8015M/8020 <br /> Benzene ND 050 Q-23b <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Trifluorotoluene 950% 70-130 " <br /> uoia 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 5 <br />