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619 Sinker Ave Ste 8 <br /> Sequoia Sacramento C95634 <br /> (416)922 1-9600 <br /> -0 100 <br /> Analytical' FAX{9uoiala16)92 scum <br /> www sequotalabs coin <br /> Gettler-Ryan-Dublin Project Former Unocal 2859,Stockton,CA S303055 <br /> 6747 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 03/19/03 18 34 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control C <br /> Sequoia Analytical -.Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3030781 -EPA 5030B IP/TJ <br /> Blank(3030181-BLKI) P u r Prepared& Analyzed 03/12/03 <br /> Ter(-butyl alcohol ND 100 ug/l <br /> Methyl tett-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl ten-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 2 0 " <br /> Ethanol ND 500 " <br /> 1,2-Diehlomethane ND 20 ` <br /> 1,2-Dibromoethane(EDB) ND 20 ` <br /> Surrogate 1 1-DCA-d4 = 240 _ 250 a 96- 60-140 <br /> Blank(3030181-B_LK2) Prepared&Analyzed 03/13/03 <br /> Ter[-butyl alcohol ND 100 ug/l <br /> Methyl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tent-butyl ether ND 2 0 " <br /> Ten-amyl methyl ether ND 20 - <br /> Ethanol =ND 500 <br /> 1,2-Dichloroethane ND 20 " <br /> Y Surrogate 1 1-DC4-d4 115 250 90 60-140 T <br /> , <br /> Laboratory Control Sample(3030181-BS 1) Prepared& Analyzed 03/12/03 <br /> Methyl ten-butyl ether 179 20 ug/l 224 s0 60-140 <br /> Surrogate 1 1-DCA-d4 266 250 106 60-140 <br /> Laboratory Control Sample(3030781-BS2) Prepared& Analyzed 03/13/03 <br /> Methyl tert-butyl ether 161 20 ug/l 224 72 60-140 <br /> Surrogate 1 1-DCA Jd4 258 250 103 60-140 <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples anal)ned in accordance with the chain of <br /> custodv document Unless othemuse stated results are reported on a wet weight basis <br /> This anahitical repot t must be reproduced in its entirety <br /> Page 21 of 24 <br />