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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 seguoialabs corn <br />ettler Rvan Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 09 -May -00 11 21 <br />Total PnrapnhlP Hvdrnenrhnnc W6-0121. BTEX and MTBE by DHS LUFT <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />0nalvte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br />INF 2 (15 20) (W005160-04) Air <br />Sampled 04-Mav-00 15 20 Received 05 -May -00 14 40 r-Uc <br />Purgeable Hydrocarbons <br />3600 <br />1000 mg/ml Air 20 OE08013 06 May -00 06 Mav-00 DHS LUFT <br />Benzene <br />960 <br />10 <br />Toluene <br />790 <br />10 <br />Ethylbenzene <br />34 <br />10 <br />Xylenes (total) <br />180 <br />10 <br />Methyl tert-but}l ether <br />5100 <br />50 <br />Surrogate a a a-Tnfluorotoluene <br />141 % '0-130 S-04 <br />EX -1 (W005160-05) Water Sampled 04 -May -00 15 05 <br />Received 05 -May -00 14 40 P-03 <br />Purgeable Hydrocarbons <br />68000 <br />50000 ugn 1040 OE08003 08 -May 00 08 May -00 EPA <br />8015W8020 <br />Benzene <br />20000 <br />500 <br />Toluene <br />ND <br />500 <br />Ethylbenzene <br />660 <br />500 " <br />(total) <br />ND <br />500 <br />6es <br />A tert-butyl ether <br />400000 <br />2500 " <br />Surrogate a a,a-Tnfluorololuene <br />107% 70-130 " <br />oia Analytical - Walnut Creek The retuft r in this report apply to the samples analyzed in accordance wuh the chain of <br />6 custody document This analytical report must be reproduced in its entirety <br />Page 3 of 11 <br />