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819 Striker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> -Ryan-Dublin Project Former Unocal 0187,Stockton,CA 5211332 <br /> 6747 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 /> lAnaiyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2110312-EPA 5030B [P/TJ <br /> Blank(2110312-ULKI) Prepared&Analyzed 11/20/02 <br /> Methyl tert-butyl ether ND 050 119/1 <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> Ethanol ND 50 " <br /> Surrogate 1,2-DCA-d4 274 250 110 60-140 <br /> Laboratory Control Sample(2110312-BSI) Prepared&Analyzed 11/20/02 <br /> Methyl Leri-butyl ether 200 050 11911 21 8 92 60-140 <br /> Sate 12-DCA-d4 282 0, 250 113 60-140 <br /> Matrix Spike(2110312-MS1) Source 5211332-09 Prepared 11/20/02 Analyzed 11/21/02 <br /> Methyl tent-butyl ether 20 8 050 ug/l 21 8 ND 95 60-140 <br /> Surrogate 1,2-DCA-d4 286 250 114 60-140 <br /> Matrix Spike Du 2110312-MSD1 Source 5211332-09 Prepared 11/20/02 Analyzed 11/21/02 <br /> Methyl tert-butyi ether 200 050 ug/1 21 8 ND 92 60-140 4 25 <br /> Surrogate 1 2-DCA-d4 25 7 25 0 103 60-140 <br /> Batch 2110313-EPA 5030E PIT] <br /> Blank(2110313-BLK1) Prepared&Anal zed 11/18/02 <br /> Tert-butyl alcohol ND 50 ug/l <br /> Methyl Cert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 0 50 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Teri-amyl methyl ether ND 0 50 " <br /> Ethanol ND 50 " <br /> Surrogate 12-DCA-d4 226 250 90 60-140 <br /> AdIlk <br /> oia 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 /> 39 of 41 <br />