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404 N Wiget Lane <br /> Sequoia Walnut Creek CE 94598 <br /> (925)988-9600 <br /> FAX <br /> Analytical {925}988-9(73 <br /> www sequoEalabs coin <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-9840 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 06-Jun-01 08 21 <br /> Industrial Solvents by EPA Method 8015 (modified)- Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Lurut Notes <br /> Batch 1E25008-EPA 3810 Headspace <br /> Blank(IE25008-BLKI) Prepared&Analyzed 25-May-01 <br /> Methanol ND 1000 ug/1 <br /> Surrogate 1 pentanol 5220 5000 104 55-157 <br /> Surrogate 1 pentanol(dbwax) 5340 5000 107 57-170 <br /> LCS(1E25008-BSI) Prepared&Analyzed 25-May-Ol <br /> Methanol 8790 1000 ugli 8000 110 50-150 <br /> Surrogate 1 pemanol 5190 5000 104 55-157 <br /> Surrogate 1 pemanol(dbw=) 5270 5000 105 57-170 <br /> Matrix Spike(IE25008-MS1) Source MKE0496-10 Prepared&Analyzed 25-May-01 <br /> Methanol 7590 1000 ug/1 8000 ND 949 50-150 <br /> Sate 1 pemanol 5180 „ 5000 104 55-157 <br /> ate 1 pentanol(dbwax) 5250 5000 105 57-170 <br /> Matrix Spike Dup (IE25008-MSDI) Source MKE0496-10 Prepared&Analyzed 25-May-01 <br /> Methanol 7980 1000 ug/1 8000 ND 998 50-150 501 50 <br /> Surrogate 1 pentanol 5210 5000 104 55-157 <br /> Surrogate 1 penlanol(dbwax) 5300 5000 106 57-170 <br /> Batch 1E29006-EPA 3810 Headspace <br /> Blank(1E29006-BLKI) Prepared&Analyzed 29-May-01 <br /> Methanol ND 1000 ug/l <br /> Surrogate 1-penlanol 5090 5000 102 55-157 <br /> Surrogate 1-pentanol(dbwax) 5180 5000 104 57-170 <br /> LCS(1E29006-BS1) Prepared&Analyzed 29-May-01 <br /> Methanol 7110 1000 ugfl 8000 989 50-150 <br /> Surrogate 1 pentanol 5070 5000 101 55-157 <br /> Surrogate I-pentanol(dbwax) 5140 5000 103 57-170 <br /> la Analytical-Walnut Creek The results in tins report apply to the samples analysed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 12 <br />