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404 N W1get Lane <br /> Sequoia Walnut Geek CA 94598 <br /> (925• FAX(925}988-9673 <br /> � Analytical ,w,sequoialabs com <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite 3 Project Number Tosco#6981 Reported <br /> Dublin CA,94568 Project Manager Scott Polston 05-Sep-01 18 11 <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-INF(W108418-02)Air Sampled 23-Aug-0109 23 Received 23-Aug-01 11 03 <br /> Purgeable Hydrocarbons(C6-C12) ND 10 mghW Air 02 1H21003 23-Aug-01 23-Aug-01 DHS LUFT <br /> Benzene ND 010 ^ " " ^ <br /> Toluene ND 010 ^ " <br /> Ethylbenzene ND 010 ^ " <br /> Xylenes(total) ND 0 to " ^ <br /> Methyl tent-butyl ether(MTBE) ND 050 <br /> Surrogate a,a,a-Trifluorotoluene 923% 70-130 <br /> Ve-6(W108418-03)Air Sampled 23-Aug-01 08 49 Received 23-Aug-01 11 03 <br /> Purgeable Hydrocarbons(C6-C l2) ND 10 mg/m'Air 02 1 H21003 23-Aug-01 23-Aug-01 DHS LUFT <br /> Benzene ND 010 " " " ^ <br /> Toluene ND 010 <br /> Ethylbenzene ND 010 <br /> Xylenes(total) ND 010 <br /> Methyl tert-butyl ether(MTBE) ND 050 <br /> Surrogate a,a,a-Trifluorotoluene 91 7% 70-130 <br /> Ve-3(WI08418-04)Air Sampled 23-Aug-0108 51 Received 23-Aug-0111 03 <br /> Purgeable Hydrocarbons(C6-Cl2) ND 10 mg/m'Air 0 2 1H21003 23-Aug-01 23-Aug-01 DHS LUFT <br /> Benzene ND 010 " <br /> Toluene ND 010 <br /> Ethylbenzene ND 010 " " " " <br /> Xylenes(total) ND 010 <br /> Methyl tert-butyl ether(MTBE) ND 050 <br /> Surrogate aa a-Trifluorotoluene 920% 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 en <br /> Page 2 of 12 <br />