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404 N Wiget�Lane L� <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 <br /> 673 <br /> Analytical <br /> FAX(925)9 <br /> www sequolafabs rom com 3 <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> _6747-Sierra Court-Suite I Project Number Chevron#9-6171 Reported _ <br /> Dublin CA,94568 Project Manager Deanna L Harding 31-Jul-01 07 59 <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 °/aREC Limits RPD Limit Notes <br /> Batch 1G23006-EPA 3810 Headspace <br /> Blank(1G23006-BLKI) Prepared&Analyzed 23-Jul-0l <br /> Methanol ND 1000 ug/l <br /> Surrogate 1 pentanol 5100 5000 102 55-157 <br /> Surrogate 1 pentanol(dbwau) 5330 5000 107 57-170 <br /> LCS(1G23006-BSI) Prepared&Analyzed 23-Jul-01 <br /> Methanol 7590 1000 ugll 8000 949 50-150 <br /> Surrogate 1 penianol 5250 5000 105 55-157 <br /> Surrogate 1 pentanol(dbwax) 5310 5000 106 57-170 <br /> Matrix Spike(I G23006-MS I) Source W107262-11 Prepared&Analyzed 23-Jul-01 <br /> Methanol 7490 1000 ugA 8000 ND 936 50-150 <br /> Surrogate 1 pentanol 5020 5000 100 55-157 <br /> Surrogate 1 pentanol(dbwax) 5120 5000 102 57-170 . <br /> Matrix Spike Dup(1G23006-MSDI) Source W107262-11 Prepared&Analyzed 23-Jul-01 <br /> Methanol 7590 1000 ug/1 8000 ND 949 50-150 133 50 <br /> Surrogate 1 pentanol 4750 5000 950 55-157 <br /> Surrogate 1 pentanol(db wax) 4860 — _ 5000 - _ ---972 57-170 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the ch" <br /> Th <br /> custody document is analytical report must be reproduced in its en <br /> Page 17 of 18 <br />