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819 Striker Ave Ste 8 <br /> DSequoia Sacramento,CA 95834 <br /> WO Analytical FAX(916)921-9600 <br /> {916}921-0100 <br /> Ryan-Dublin Project Former Unocal 0187,Stockton,CA S211332 <br /> 67 Sierra Court,Ste J Project Number N/A Reported. <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/27/02 17 49 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br />[Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2110265-EPA 5030B JP/Tl <br /> Blank(2110265-BLKI) Pre ared&Analyzed 11/18/02 <br /> Ten-butyl alcohol ND 50 U94 <br /> Methyl ten-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl ten-butyl ether ND 050 " <br /> Teri-amyl methyl ether ND 050 " <br /> Ethanol ND 50 " <br /> Surrogate 1 2-DCA-d4 226 250 90 60-140 <br /> Laboratory Control Sample(2110265-BSI) Pre ared&Analyzed 11/18/02 <br /> Methyl ten-butyl ether 209 050 119/1 21 8 96 60-140 <br /> SOto 11-DCA-d4 24 7 " 250 99 60-140 <br /> Matrix Spike(2110265-MSI) Source S211132-02 Prepared&Anal zed 11/18/02 <br /> Methyl tert-butyl ether 195 050 118/1 21 8 ND 89 60-140 <br /> Surrogate 1 2-DCA-d4 248 to250 99 60-140 <br /> Matrix Spike Du (2110265-MSDI) Source S211132-02 Pre ared&Analyzed 11/18/02 <br /> Methyl tert-butyl ether 226 050 U94 21 8 ND 104 60-140 15 25 <br /> Surrogate 1,2-DCA-d4 233 250 93 60-140 <br /> Batch 2110282-EPA 5030B PIT <br /> Blank(2110282-BLKI) Pre ared&Anal zed 11/19/02 <br /> Tert-butyl alcohol ND 50 ug4 <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 0 50 " <br /> Ethanol ND 50 " <br /> Surrogate 1 1-DCA-d4 24 7 250 99 60-140 <br /> is Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated,results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 37 of 41 <br />