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Sequoia <br />Analytical <br />404 N Wlget Lane <br />Walnut Geek, CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequolalabs com <br />Gettler Ryan Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron 09-5775 Reported <br />Dublin CA, 94568 Project Manager Scott Polston 21 -Jun -00 11 57 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch OF19002 - EPA 5030B (PIT] <br />Blank (OF19002-BLKI) Prepared & Analyzed 19 -Jun -00 <br />Purgeable Hydrocarbons ND 50 ug/I <br />Benzene ND 0 50 <br />Toluene ND 050 <br />Ethvlbenzene ND 050 <br />Xylenes (total) ND 050 <br />Surrogate aa.a-Tnfluorotoluene <br />291 <br />300 970 '10-130 <br />LCS (OF19002-BSI) <br />Matrix Spike (OF19002-MSI) <br />Prepared & Analyzed 19 -Jun -00 <br />Benzene <br />169 <br />050 <br />ugll 200 845 70-130 <br />Toluene <br />184 <br />050 <br />200 920 70.130 <br />Ethylbenzene <br />202 <br />050 <br />200 101 70-130 <br />Xylenes (total) <br />608 <br />050 <br />600 101 70-130 <br />Surrogate aaa-Tn;'luoroiohrene <br />267 <br />300 890 70-130 <br />Matrix Spike (OF19002-MSI) <br />Source W006190-03 <br />Prepared & Analyzed 19 -Jim -00 <br />Benzme <br />169 <br />050 ugfl <br />200 ND 845 70-130 <br />Toluene <br />18.S <br />050 <br />200 ND 92.5 70-130 <br />Ethylbenzene <br />166 <br />050 <br />200 ND 830 70-130 <br />Xylenes (total) <br />616 <br />050 <br />600 ND 103 70.130 <br />Surrogate 4aa-ThOkw toluene <br />256 <br />300 8S 3 70.130 <br />Matrix Spike Dup (OF19002-MSDI) <br />Source W006190-03 <br />Prepared & Analyzed 19 -Jun -00 <br />Benzene <br />135 <br />050 ugll <br />200 ND 775 70-130 <br />864 <br />20 <br />Toluene <br />175 <br />050 <br />200 ND 975 70-130 <br />556 <br />20 <br />Ethylbauzene <br />196 <br />050 <br />200 ND 980 70-130 <br />166 <br />20 <br />Xylenes (total) <br />599 <br />050 <br />600 ND 998 70.130 <br />280 <br />20 <br />Surrogate aaa-Tnfluorotoluene <br />262 300 873 10.130 <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the char" of <br />custody document. Tins analytical report must be reproduced in its entirety <br />9 <br />Page 4 of 6 <br />