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404 N Wiget Lane i <br /> Walnut Creek CA 94598 1, <br /> Sequoia ' (925)988-9600 <br /> FAX(925)988-9673 tp <br /> Analyticalwww sequotalabs com <br /> C,ettler Ryan Inc - Dublin Project Tosco <br /> 6747 Sierra Court Suite I Project Number Tosco# 11 193 Reported <br /> Dublin CA 94568 Project Manager Doug Lee 16-Oct-01 08 43 <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 BatchY Prepared Anaiyzed Method Notes <br /> MW-1 (W110163-01)Water Sampled 05-Oct-01 00 00 Received 09-Oct-01 15 15 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 uO I 1110002 10-Oct-01 IO-Oct-01 EPA' <br /> _ 8015M/8021 <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether(MTBE) 390 25 10 _ _ " _ Q_28a <br /> Surrogate a a a-Trifluorotoluene _ 104% 70-130 " <br /> MW-2 (W11101163-02)Water Sampled 05-Oct-010000 Received 09-Oct-01 15 15 <br /> Purgeable Hydrocarbons(C6-C 12) ND 20000 ug/i 400 IJ10002 10-Oct-01 IO-Oct-01 EPA <br /> 8015M/8021 <br /> Benzene ND 200 <br /> Toluene ND 200 " <br /> Ethylbenzene ND 200 " <br /> Xvlenes(total) ND 200 <br /> Methyl tert-butyl ether(MTBE) 87000 1000 __ ° F �T0-20 <br /> Surrogate a a a-Trifluorotoluene 103% 70-130 " <br /> VW-1-(W110163-03)Water Sampled 05=Oct701-00 00—Received 09-Oct-01 15 15 <br /> Purgeable Hydrocarbons(C6-C 12) ND 25000 ug/i 500 1110002 10-Oct-01 10-Oct-01 EPA <br /> 8015M/8021 <br /> Benzene ND 250 " <br /> Toluene ND 250 <br /> Ethylbenzene ND 250 <br /> Xylenes(total) ND 250 " <br /> Methyl tert-butyl ether(MTBE) 180000 1200 Q-28 <br /> Suri ogate a a a-Trrfluorotoluene _ 100% 70-130 -- <br /> , <br /> Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chat <br /> custody document This analytical report must be reproduced in its entr <br /> Page 2 of 4 <br />