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QSequoia <br />Analytical <br />404 N Wiget lane <br />Walnut Geek. CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www seq m <br />Gettler Rvan Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 24 -Jul -00 11 33 <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 />rte Result Lunt Units Level Result %REC Lunts RPD Lunt Notes <br />Batch OG10001 - EPA 5030B [PITT <br />Matrix Spike Dup (OG1000i-MSD1) <br />Source W006676-19 <br />Prepared & Analyzed 10 -Jul -00 <br />168 <br />050 ugli <br />200 <br />ND <br />840 <br />70-130 <br />235 <br />20 <br />Benzene <br />186 <br />050 <br />20 0 <br />ND <br />930 <br />70-130 <br />472 <br />20 <br />Toluene <br />220 <br />050 <br />200 <br />ND <br />Ito <br />70-130 <br />0 905 <br />20 <br />Ethylhenzene <br />630 <br />050 <br />600 <br />ND <br />105 <br />70-130 <br />0 t59 <br />20 <br />Xylenes (total) <br />Surrogate aaa-Trtfluorotoluene <br />254 <br />300 <br />847 <br />70-130 <br />• <br />The results to thus repair apply io the samples analyzed to accordance with of <br />Sequoia Analytical -Walnut Creek <br />custody document. Tlas analytical report must be reproduced ra tt ty <br />Page 9 of 15 <br />