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819 Striker Ave Ste 8 <br /> IDqSe ilUla Sacramento,CA 95834 <br /> (916)921-9600 <br /> qW Analytical ww,seq of la s.com <br /> www.scquoiala6s.com <br /> -Ryan-Dublin Project: Former Unocal 0187,Stockton,CA S306048 <br /> 6 Sierra Court,Ste.] Project Number: NIA Reported: <br /> Dublin CA,94568 Project Manager. Deanna L.Harding 06/16/03 15:43 <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 /> )3atch 3060167-EPA 5030B PIT <br /> Blank(3060167-BLKI) Prepared&Analyzed: 06/11/03 <br /> Ethanol ND 50 agA <br /> Surrogate:1,2-DCA-d4 27.4 25.0 110 60-140 <br /> Laboratory Control Sample(3060167-BSl) Pre ared&Analyzed: 06/11/03 <br /> Methyl ten-butyl ether 18.6 0.50 ugA 22.4 83 60-140 <br /> Surrogate:1,2-DCA-d4 26.9 25.0 108 60-140 <br /> Batch 3060184-EPA 5030B IM <br /> Blank(3060184-BLKI) Prepared&Analyzed: 6/11/03 <br /> T tyl alcohol ND 5.0 ugll <br /> tert-butyl ether ND 0.50 " <br /> Di-isopropyl ether ND 0.50 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Tert-amyl methyl ether ND 0.50 <br /> Ethanol ND 50 " <br /> Surrogate:1,2-DCA-d4 27.4 " 15.0 110 60-140 <br /> Blank(3060184-BLK2) Prepared& Analyzed: 06/12/03 <br /> Teri-butyl alcohol ND 5.0 USA <br /> Methyl tert-butyl ether ND 0.50 " <br /> Di-isopropyl ether ND 0.50 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Tett-amyl methyl ether ND 0.50 " <br /> Ethanol ND 50 " <br /> Surrogate:1.2-DCA-d4 14.5 25.0 98 60-140 <br /> is 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 /> f <br /> This analytical report must be reproduced in its entirety. <br /> t <br /> Page 30 of 32 <br />