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14 2) <br />Sequoia <br />VOAnalytical <br />Gettler Ryan, lac - Dublin <br />6747 Sierra Court Suite J <br />Dublin CA, 94568 <br />Project Chevron <br />Project Number Chevron # 9-5775 <br />Project Manager Deannal, Harding <br />Industrial Solvents by EPA Method 8015 (modified) - Quality Control <br />Sequoia Analytical - Morgan Hill <br />404 N Wiget Lane <br />Walnut Creek, CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoialabs corn <br />Reported <br />29 -Jul -0017 31 <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Units Level Result %REC Limits RPD Lmut Notes <br />Batch OG26009 - EPA 3810 Headspace <br />Blank (OG26009-BLK1) Prepared & Analyzed 26 -Jul -00 <br />Methanol ND 100 mg/1 <br />Surrogate 1 pentmwl <br />Surrogate I pentanol (dbwax) <br />455 " 500 910 55-157 <br />411 Soo 842 57-170 <br />LCS (OG26009-BSI) Prepared & Analyzed 26 -Jul -00 <br />Melbanol 771 100 mg/1 800 964 70-130 <br />Surrogate 1 pentanol 592 500 118 55-157 <br />Surrogate 1 pentanol (db waz) 550 500 110 57-170 <br />Matnz Spike (OG26009-MSI) Source MJG0428-06 Prepared & Analyzed 26 -Jul -00 <br />Methanol 760 100 tng4 800 ND 950 50-150 <br />Surrogate 1 pentanol 637 500 127 55-157 <br />Surrogate 1 pentanol (dbwax) 574 500 115 57-170 • <br />Matra Spike Dup (OG26009-MSD I) Source MJG042846 Prepared & Analyzed 26 -Jul -00 <br />Methanol 724 too mg/1 800 ND 905 50-150 485 50 <br />Surrogate 1 pentanol <br />Surrogate 1 pentanol (dbwax) <br />601 Soo 110 55-157 <br />566 500 114 57-170 <br />Sequoia Analytical - Walnut Creek The results on 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 25 of 26 <br />