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w <br /> 819 Striker Ave Ste 8 <br /> Sequoia Sacramento, 95834 <br /> (916)9292 1-9600-%W <br /> 4D1W <br /> Analytical wwseq 6ialabs 100 <br /> .vww sequoialabs corn <br /> *Ryan-Dublin Project Former Unocal 2859,Stockton,CA 5211346 <br /> 61�ISierra Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/04/02 14 47 <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 21110313-EPA 5030B IP/TI <br /> Blank(2110313-BLKI) Prepared& Analyzed 11/18/02 <br /> Tert-butyl alcohol ND 100 ug/1 <br /> Methyl ten-butyl ether ND 2 0 " <br /> Di-isopropyl ether ND 2 0 " <br /> Etliyl tert-butyl ether ND 20 " <br /> Teri-amyl methyl ether ND 2 0 " <br /> Ethanol ND 500 " <br /> 1,2-Dichloroethane ND 20 <br /> 1,2-Dibromoethane(EDB) ND 20 " <br /> Surrogate 12-DCA-d4 226 250 90 60-140 <br /> Blank(2110313-BLK2) Prepared 11/20/02 Analyzed 11/21/02 <br /> tyl alcohol ND 100 ugll <br /> teri-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tent-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Ethanol ND 500 " <br /> 1,2-Dichloroethane ND 20 " <br /> 1,2-Dibromoethane(EDB) ND 20 " <br /> Surrogate 12-DCA-d4 277 250 111 60-140 <br /> Laboratory Control Sam le(21103]3-1351) Prepared& Analyzed 11/18/02 <br /> Methyl tert-butyl ether 209 20 ug/] 21 8 96 60-140 <br /> Surrogate 11-DCA-d4 247 250 99 60-140 <br /> Laboratory Control Sample(2110313-BS2) Prepared&Analyzed 11/20/02 <br /> Methyl tert-butyl ether 200 20 ug/l 218 92 60-140 <br /> Surrogate 11-DCA-d4 181 250 113 60-140 <br /> la Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 20 of 22 <br />