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Sequoia <br />� Analytical <br />404 N WISet Lane <br />Walnut Creek CA 94598 <br />(925) 98&9600 <br />FAX (925) 988.9673 <br />WWW sequolalabs Con, <br />Gettler Ryan Inc -Dublin Project Chevron <br />6747 Sierra Court Suite 3 Project Number Chevron #9-5775 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 />A. nivtP Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch OF19002 - FPA 5030B [PIT] <br />Blank (OF19002-BLKI) Prepared & Analyzed 19 -Jun -00 <br />Purgeable Hydrocarbons ND 50 ugll <br />Benzene <br />ND <br />050 <br />Toluene <br />ND <br />050 <br />Ethvlbenzene <br />ND <br />050 <br />Xylenes (total) <br />ND <br />050 <br />Surrogate aaa-Triluorotoluene <br />291 <br />300 <br />970 <br />70.130 <br />LCS (OF19002-BSI) <br />Prepared & Analyzed <br />19 -Jun -00 <br />Benzene <br />16 9 <br />0 50 ug/l <br />200 <br />845 <br />70-130 <br />Toluene <br />18 4 <br />050 <br />200 <br />920 <br />70-130 <br />Ethylbenzene <br />202 <br />050 1.200 <br />101 <br />70-130 <br />Xylenes (total) <br />60 8 <br />050 <br />600 <br />101 <br />70-130 <br />Surrogate as a-Tnlluorotoluene <br />267 <br />JOG <br />890 <br />70-130 <br />Matrix Spike (OF19002-MSI) <br />Source W006190-03 <br />Prepared & Analyzed <br />19 -Jun -00 <br />Benzene <br />16 9 <br />050 ug/I <br />200 ND <br />845 <br />70-130 <br />Toluene <br />18 5 <br />050 <br />20 0 ND <br />925 <br />70-130 <br />Ethylbenzene <br />16 6 <br />050 <br />200 ND <br />830 <br />70-130 <br />Xylenes (total) <br />616 <br />050 <br />600 ND <br />103 <br />70-130 <br />Surrogate as a-Tr7 luororoluene <br />15 6 <br />100 <br />853 <br />70.130 <br />Matrix Spike Dup (OF19002-MSD1) <br />Source W006190-03 <br />Prepared & Analvzed <br />19 -Jun -00 <br />Benzene <br />155 <br />050 ugll <br />200 ND <br />775 <br />70-130 <br />864 <br />Toluene <br />175 <br />050 <br />200 ND <br />875 <br />70-130 <br />556 <br />Ethylbenzene <br />19 6 <br />050 <br />20 0 ND <br />98 0 <br />70-130 <br />16 6 <br />Xylenes (total) <br />59 9 <br />050 <br />600 ND <br />998 <br />70-130 <br />280 <br />Surrogate aaa-Triluorotoluene <br />262 <br />300 <br />873 <br />70-130 <br />20 <br />20 <br />20 <br />20 <br />• <br />Sequoia Analvtical - Walnut Creek The results to this report apply to the samples analyzed in accordance wrth the chat" of <br />custody document. This analytical repos must be reproduced in its entirety„` <br />Page 4 of 6 <br />