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�41 Sequoia <br />Analytical <br />404 N Wlget Lane <br />Walnut Creek CA 94598 <br />(925) 98a-9600 <br />FAX (925) 988-9673 <br />www sequoialabs corn <br />Gettler Ryan Inc -Dublin Project Chevron <br />6747 Sierra Court Suite 7 Project Number Chevron it 9-5775 Reported <br />Dubltn CA 94568 Project Manager Scott Polston 09 -May -0O 1121 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE 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 Nates <br />Batch OE08013 - EPA 5030B [P/TI <br />Blank (OE08013-BLKI) <br />Prepared 05-Mav-00 Analvzed 06 -May -00 <br />Purgeable Hydrocarbons <br />ND <br />10 mgf m' Air <br />Benzene <br />ND <br />010 <br />Toluene <br />ND <br />0 10 " <br />Ethylbenzene <br />ND <br />0 10 <br />Xylenes (total) <br />ND <br />0 10 <br />Methvl tert-butyl ether <br />ND <br />050 <br />Surrogate aaa-Trifluorololuene <br />586 <br />600 977 70-130 <br />LCS (OE08013-BSI) <br />Prepared 05-Mav-00 Analvzed 08 -May -00 <br />Benzene <br />164 <br />0 10 mg/ml Air <br />200 920 70-130 <br />Toluene <br />175 <br />010 <br />200 875 70-130 <br />Ethylbenzene <br />191 <br />0 10 <br />200 955 70-130 <br />Xylenes (total) <br />560 <br />0 10 <br />600 933 70-130 <br />Surrogate aa, a•TnJluorotoluene <br />5 38 <br />oo <br />600 897 70.130 <br />LCS Dup (OE08013-MI) <br />Prepared 05 -May -00 Analyzed 06 -May -00 <br />Q-07 <br />Benzene <br />143 <br />010 rngW Air <br />200 715 70-130 t3 7 <br />20 <br />Toluene <br />154 <br />010 <br />200 770 70-130 l2 8 <br />20 <br />Ethylbenzene <br />156 <br />010 <br />200 790 70-130 202 <br />20 <br />We= (tow) <br />490 <br />010 <br />600 917 70-130 133 <br />20 <br />Simogate a 4o -Tri lrrorotohiene <br />534 <br />600 890 70-130 <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance -rib the char" of <br />custodv document. This analytical report must be reproduced in its entirb <br />Page 8 of 11 <br />i*: <br />