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Sequoia <br />Analytical <br />PGI ettler Ryan, Inc - Dublin <br />6747 Sierra Court Suite 7 <br />Dublin CA 94568 <br />Project Chevron <br />Project Number Chevron #a 9-5775 <br />Project Manager Scott Polston <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (9251988-9673 <br />www sequoialabs com <br />Reported <br />09 -May -00 11 21 <br />Total Purgeable Hydrocarbons (C6-02), BTEX and MTBE by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Chits Level Result %REC Limits RPD Luntt Notes <br />Batch OE08003 - EPA 5030B [PIT] <br />Blank (OE08003-BLKI) <br />Source W005011-02 <br />Prepared & Analyzed 08 -May -00 <br />Purgeable Hydrocarbons <br />ND <br />50 ug/l <br />Benzene <br />ND <br />050 <br />Toluene <br />ND <br />050 <br />Ethylbenzene <br />ND <br />0 50 <br />Xylenes (total) <br />ND <br />0 50 " <br />Methyl test butyl ether <br />ND <br />2 5 <br />Surrogate qaa-Tnfluorotoluene 297 300 990 70-130 <br />LCS (OE08003-BSI) <br />Source W005011-02 <br />Prepared & Analyzed 08 -May -00 <br />Prepared & Analyzed 08 -May -00 <br />Benzene <br />170 <br />0 50 <br />ug/l 200 850 70-130 <br />Toluene <br />182 <br />050 <br />200 910 70-130 <br />Elhylbenzene <br />193 <br />0 50 <br />200 965 70-130 <br />klenes (total) <br />578 <br />0 50 <br />600 963 70-130 <br />asa-Tri luorotoluene <br />288 1300 960 70-130 <br />Matrix Spike (OE08003-MSI) <br />Source W005011-02 <br />Prepared & Analyzed 08 -May -00 <br />Benzene <br />165 <br />0 50 ug/l <br />200 <br />ND <br />925 <br />70-130 <br />Toluene <br />16 9 <br />050 <br />200 <br />ND <br />845 <br />70-130 <br />Ethylbenzene <br />176 <br />0 50 <br />200 <br />ND <br />880 <br />70-130 <br />Xylenes (total) <br />537 <br />050 <br />600 <br />ND <br />895 <br />70-130 <br />Surrogate aao-Tnfluoroioluene <br />184 <br />300 <br />94 7 <br />70.130 <br />Matrix Spike Dup (OE08003-MSD1) <br />Source W005011-02 <br />Prepared & Analyzed 08 -May -00 <br />Benzene <br />185 050 ug/I <br />200 ND 925 70-130 <br />I 1 4 <br />20 <br />Toluene <br />194 050 <br />200 ND 970 70-130 <br />138 <br />20 <br />Ethylbenzene <br />201 050 <br />200 ND 101 70-130 <br />133 <br />20 <br />Xylenes (total) <br />609 050 <br />600 ND 102 70-130 <br />126 <br />20 <br />Surrogate aaa-TnfTuoroioluene 311 300 104 70-130 <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br />iscustody document This analytical report must be reproduced in its entirety <br />Page 7 of 11 <br />:*. <br />