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Sequoia <br />Analytical <br />Gettler Rvan Inc. -Dublin <br />6747 Sierra Court Suite J <br />Dublin CA 94568 <br />ProjeLt Chevron <br />Project Number Chevron # 9-5775 <br />Project Manager Scott Polston <br />404 N WISetLane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequolalabs corn <br />Reported <br />07 -Jun -00 10 12 <br />Tota! Purgeable Hydrocarbons (C6-Cl2) and BTEX by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spite Source %REC RPD <br />Analvte Result Limit Units Level Result %REC Limits RPD Lirtut Notes <br />Batch OF05001 - EPA 5030B [PIT] <br />Blank (OF05001-BLKI) <br />Prepared & Analyzed 05 -Jun -00 <br />Purgeable Hvdroc arbors <br />ND <br />50 <br />ug/1 <br />Benzene <br />ND <br />050 <br />" <br />Toluene <br />ND <br />050 <br />" <br />Ethylbenzene <br />ND <br />050 <br />" <br />\vlenes (total) <br />ND <br />050 <br />Surrogate a a a -Tri luororoluene <br />332 <br />300 111 10-130 <br />LCS (OFOSOOI-BSI) <br />Prepared 05 -Jun -00 Analvzed 07 -Jun -00 <br />Benzene <br />162 <br />0 50 <br />ug/1 <br />1,0 0 810 70-130 <br />Toluene <br />180 <br />050 <br />200 90 0 70-130 <br />Ethylbenzene <br />194 <br />050 <br />200 970 70-130 <br />Xylenes (total) <br />595 <br />0 50 <br />600 992 70-130 <br />Surrogate a a a -Tri luorotoluene <br />264 <br />300 880 70-130 <br />LCS Dup (OF05001-BSD1) <br />Prepared & Analyzed 05 -Jun -00 <br />Benzene <br />165 <br />0 50 <br />ugli <br />200 825 70-130 183 <br />20 <br />Toluene <br />181 <br />0 50 <br />200 905 70-130 0 554 <br />20 <br />Ediylbenzene <br />194 <br />050 <br />200 970 70-130 0 <br />20 <br />Xylenes (totai) <br />591 <br />050 <br />600 985 70-130 0 675 <br />20 <br />Surrogate g iz a-Trtfluorotoluene <br />266 <br />300 88 7 70-130 <br />Sequoia Analytical - Walnut Creek <br />The results in this report apply to the samples analyzed in accordance with the chain of <br />custody document Tins analytical report must be reproduced to its entire* <br />Page 4 of 6 <br />