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Sequoia <br />� Analytical <br />404 N WISet Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www se4uoialabs com <br />Gettler Rvan, Inc - Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron 49-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 24 -Jul -00 11 33 <br />Alcohols by EPA 8015B GC/FID - Quality Control <br />North Creek Analytical - Portland <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 0070273 - 3810 Headspace <br />Blank (0070273-BLKI) Prepared & Analyzed 13 -Jul -00 <br />Methanol ND 100 mg/l <br />LCS (0070273 -BSI) Prepared & Analyzed 13 -Jul -00 <br />Methanol 504 100 mg/l 502 100 50-150 <br />Matrix Spike (0070273 -MSI) Source W007143-03 Prepared & Analyzed 13 -Jul -00 <br />Methanol 498 100 mg/I 502 ND 992 50-150 <br />Matrix Spike Dup (0070273-MSDI) Source W007143-03 Prepared & Analyzed 13 -Jul -00 <br />Methanol 50 1 100 mgfl 502 ND 998 50-150 0 601 25 <br />Batch 0070319 - 3810 Headspace <br />Wank (0070319-BLKI) Prepared 14 -Jul -00 Analyzed 17 -Jul -00 <br />.ethanol <br />ND 100 MO <br />LCS (0070319 -BSI) <br />Prepared 14 -Jul -00 Analyzed 17 -Jul -00 <br />Methanol <br />486 100 mg/I <br />502 968 <br />50-150 <br />Matnx Spike (0070319 -MSI) <br />Source W007143-05 <br />Prepared 14 -Jul -00 Analyzed <br />17 -Jul -00 <br />Methanol <br />540 100 mg/I <br />502 ND 108 <br />50-150 <br />Matrix Spike Dup (0070319-MSDI) <br />Source W007143-05 <br />Prepared 14 -Jul -00 Analvzed <br />17 -Jul -00 <br />Methanol <br />528 100 mg/l <br />502 ND 105 <br />50-150 225 <br />uoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br />custody document This analytical report must be reproduced in its entirety <br />Page 14 of 15 <br />