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Sequoia Walnut Creek. <br />Lane <br />t Creek,. CA CA 94598 <br />(925) 988-9600 <br />Analytical <br />FAX `925'96» <br />www sequaial <br />alabs <br />Gettler Rvan, Ilii. - Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 24 -Jul -00 11 33 <br />Volatile Organic Compounds by EPA Method 8260A - Quality Control <br />Sequoia Analytical - Walnut Creels <br />Reporting Spike Source %REC RPD <br />Analyte Result Lunit Units Level Result %REC Lirmts RPD Limit Notes <br />Batch OG11015 - EPA 5030B [PIT] <br />LCS Dup (OG11015-BSD1) Prepared & Analyzed 11 -Jul -00 <br />Methyl tent -butyl ether 430 0 50 mglrni Air 500 860 70-130 320 25 <br />Surrogate Dibromofluoromethane <br />Surrogate 12-Dichloroeihane-d4 <br />Sequoia Analytical - Walnut Creek <br />t <br />490 500 980 50-150 <br />460 500 920 50.150 <br />The results in this report apply to the samples analyzed in accordance with the <br />custody document This analytical report must be reproduced in its <br />Mt. <br />7 <br />Page 13 of 15 <br />