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• 819 Straker Ave Ste 8 <br /> Sequoia Sacrain(9to,CA <br /> 95834 <br /> (915)921-9600-9600 <br /> WAnalytical =amu 3a2m <br /> Ryan-Dublin Project TOSCO 11192,Stockton,CA S305429 <br /> Sierra Court,Ste J Project Nurnber- N/A Reported <br /> Dublin CA,94558 Project Manager Deanna L Harding 05/29/03 17 15 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Repotting Spike Source %REC RPD <br /> Analyte Result Lunt Units Level Result %REC Limits RPD Lunt Notes <br /> Batch 3050437-EPA 5030BJP/TJ <br /> Blank(3050437-BLKJ) Prepared&Analyzed 05/27/03 <br /> Tert-butyl alcohol ND 100 ugll <br /> Di-isopropyl ether ND 2 0 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Ethanol ND 500 " <br /> 1,2-Dtchloroethane ND 20 " <br /> 1,2-Dibromoethane(EDB) ND 20 " <br /> Surrogate 1,2-DCA-d4 212 250 85 60-140 <br /> Laboratory Control Sample(3050437-BSI) Prepared&Analyzed 05/27/03 <br /> Surrogate 1 1-DCA-d4 171 ug/1 250 108 60-140 <br /> • <br /> Batch 3050449-EPA 5030B IPli'l <br /> Blank(3050449-BLK1) Prepared&Analyzed 05/27/03 <br /> Tert-butyl alcohol ND 100 ug/l <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Ethanol ND 500 " <br /> 1,2-Dichlomethane ND 20 " <br /> 1,2-Dibromoethane(EDB) ND 20 " <br /> Surrogate 1 2-DCA-d4 260 250 104 60-140 <br /> Laboratory Control Sample(3050449-BSI) Prepared&Analyzed 05/27/03 <br /> Surrogate 1,2-DCA-d4 283 ug/1 250 113 60-140 <br /> Ota Analytical-Sacramento The results to 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 18 of 23 <br />