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Lane <br /> Sequoia Walnut C4 Creek CAe94598 <br /> 4D (925)988-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequolaiabs com <br /> Oettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite j Project Number Tosco# 11194 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 05-Nov-01 16 07 <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 /> OBS-W(W110533-01)Water Sampled 26-Oct-01 00 00 Received 29-Oct-01 12 35 <br /> Purgeable Hydrocarbons(C6-C12) ND 1000 ug/l 20 1J31003 01-Nov-01 01-Nov-01 EPA <br /> 8015M/8021 <br /> Benzene 11 10 " 1. ,. <br /> Toluene ND 10 " <br /> Ethylbenzene ND 10 <br /> Xylenes(total) ND 10 <br /> Surrogate a,a a-Trifluorotoluene 103% 70-130 + <br /> OBS-W(W110533-01RE1)Water Sampled 26-Oct-01 00 00 Received 29-Oct-01 12 35 <br /> Methyl tert-butyl ether(MTBE) 6400 1000 ug/l 400 1J31003 02-Nov-01 02-Nov-01 EPA Q-28b <br /> 8015M/8021 <br /> Surrogate a a a-Trifluoratoluene 102 % 70-130 <br /> MW-2(W110533-02)Water Sampled 26-Oct-01 00 00 Received 29-Oct-01 12 35 <br /> Purgeable Hydrocarbons(C6-C12) 82 50 ug/l I 1131003 01-Nov-01 01-Nov-01 EPA HC-12 <br /> 8015M/8021 <br /> lone 3 9 0 50 Q-28c <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Trrfluorotoluene 105 % 70-130 <br /> MW-2(W110533-02RE1)Water Sampled 26-Oct-010000 Received 29-Oct-01 1235 <br /> Methyl tert-butyl ether(MTBE) 450 250 ug/l 100 1131003 02-Nov-01 02-Nov-01 EPA Q-28b <br /> 8015M/8021 <br /> Surrogate a a a-Trifluorotoluene 105 % 70-130 " <br /> MW-3(WI 10533-03)Water Sampled 26-Oct-01 00 00 Received 29-Oct-01 12 35 <br /> Purgeable Hydrocarbons(C6-C12) ND 200 ug/1 4 IJ31003 02-Nov-01 02-Nov-01 EPA <br /> 8015M/8021 <br /> Benzene 42 2 0 Q-28a <br /> Toluene ND 2 0 " <br /> Ethylbenzene ND 2 6 " « <br /> Xylenes(total) ND 2 0 „ <br /> Surrogate a a a-Trifluorotoluene _ v 104 % 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 Thrs analytical report must he reproduced in its entirety <br /> Page 2 of 7 <br />