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QSequoia <br />61WO Analytical <br />404 N Wlget Lane <br />Walnut Creek, CA 94598 <br />(9z5) 98&9600 <br />FAX (925) 988-9673 <br />www sequoialabs com <br />Gettler Ryan, Inc - Dubhn Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 Reported <br />Dubim CA 94568 Project Manager Scott Polston 25 -Jul -00 10 44 <br />Industrial Solvents by EPA Method 8015 (modified) <br />Sequoia Analytical - Morgan Hill <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br />Eff (W007080-01) Water Sampled 06-1ul-0011 30 Received 06 -Jul -00 13 45 <br />Methanol <br />ND <br />100 <br />ingll 1 OG11020 13 -Jul -00 13 -Jul 00 EPA 8015M <br />Surrogate 1 pentanol <br />127% <br />55-157 <br />Surrogate I -pentanol (dbwax) <br />121 % <br />57-170 " <br />MP -2 (W007080-02) Water <br />Sampled 06 -Jul -00 11 38 <br />Received <br />06 -Jul -00 13 45 <br />Methanol <br />ND <br />100 <br />mgll 1 OG11020 13 Jul -00 13 -Jul -00 EPA 8015M <br />Surrogate 1-pentanol <br />129% <br />55-157 <br />Surrogate 1 pentanol (dbwax) <br />124% <br />57-170 <br />MP -1 (W007080-03) Water <br />Sampled 06,Tul-00 1136 <br />Received <br />06,Iu1-00 13 45 <br />Methanol <br />ND <br />100 <br />tng/l I OG11020 13 Jul -00 13 -Jul -00 EPA 8015M <br />Surrogate 1 pentanol <br />149% <br />55-157 <br />Surrogate 1 pentanol (dbwax) <br />131 % <br />57-170 <br />of (W007080-04) Water Sampled 06 -Jul -00 1139 Received 06 -Jul -00 13 45 <br />ethanol <br />268 <br />100 <br />tngll 10 OG11020 13 -Jul 00 13 Jul -00 EPA S015M <br />Surrogate 1-pentanol <br />103% <br />55-157 " <br />Surrogate 1-pentanol (dbwax) <br />101 % <br />57-170 " <br />equoia Analytical - Walnut Creek <br />The results in this report apply to the vamples analyzed in accordance with the chain of <br />custody document This analytical report must be reproduced in its entirety <br />i* <br />Page 12 of 25 <br />