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Sequoia <br />Analytical <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoialabs com <br />Gettler Ryan, Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron SS#9-5775 Reported <br />Dublin CA, 94568 Project Manager Scott Polston 25 -Apr -00 17 37 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX in Air by DHS LUFT <br />Sequoia Analytical - Walnut Creel <br />Reporting <br />knalyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br />E4F (W004472-01) Air Sampled 19 -Apr -00 15 20 Received 20 -Apr -00 15 20 P-02 <br />Purgeable Hydrocarbons 14000 200 mgw Air 20 OD21004 21 -Apr -00 21 -Apr 00 DHS LUFT <br />Benzene 3000 10 <br />Toluene 3800 10 " <br />Ethylbenzene 360 1 0 " <br />Xylenes (total) 1700 10 " <br />Surrogate a a a-Tn/luorotoluene 187 % 70-130 S-04 <br />EFF (W004472-02) Air Sampled 19 -Apr -0015 25 Received 20 -Apr -0015 20 P-01 <br />Purgeable Hydrocarbons <br />2200 <br />20 mg/ml Air <br />Benzene <br />410 <br />0 10 " <br />Toluene <br />950 <br />010 <br />Ethylbenzene <br />140 <br />0 10 " <br />Xylenes (total) <br />700 <br />0 10 <br />Surrogate a a,a-Tnfluorotoluene <br />154% 70-130 <br />i <br />2 OD21004 21 -Apr -00 21 -Apr -00 DHS LUFT <br />S-04 <br />Sequoia Analytical - Walnut Creels The results in this report apply to the samples analyzed in accordance with the chain of <br />0 custody document This analytical report must be reproduced in its entirety <br />Page 3 of 10 <br />