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1�& Seq 819 Striker Ave Ste 8 <br /> LIOI a Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)92 1-0100 <br /> www sequoialabs com <br /> ttler-Ryan-Dublin Project Former Unocal 5098, Stockton,CA 5302592 <br /> Sierra Court,Ste J Protect Number N/A Reported <br /> lin CA,94568 Protect Manager Deanna L Harding 03/10/03 17 17 <br /> GasolllnelBTEXIOxygenates by EPA method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> TA,aJYte Result Limit Units Leve! Result %REC Limits RPD Limit Notes <br /> Batch 3030025 -EPA 5030E JP/TJ <br /> atrix Spike Dup(3030025-11'ISBI) Source 5302565-02 Prepared&Analyzed 03/04/03 <br />(nzenc 22 5 050 ug/l 250 ND 90 70-130 7 25 <br /> iuene 23 6 050 250 ND 94 70-130 17 25 <br /> ethyl tent-butyl ether 249 2 0 25 0 1 6 93 60-140 5 25 <br /> rt ogate 1 1-DCA-d4 253 250 101 60-140 <br /> rrogate Toluene-d8 268 250 107 60-140 <br /> Su?)ogate 4-BFB 264 250 106 60-140 <br /> latch 3030057-EPA 5030B JP/T <br /> 1 i <br /> ank(3030057-BLKI) Prepared 03/05/03 Analyzed 03/06/03 <br /> tnzene ND 050 ug/l <br /> ucile ND 050 " <br /> t nzene ND 050 " <br /> (total) ND 050 " <br /> ethyl tert-buty)ether ND 2 0 " <br /> U� ogarogate 1 1-DCA d4 275 230 110 60-140 <br /> te <br /> Toluene d8 298 25 0 119 60-140 <br /> Surrogate 4-BF8 249 250 100 60-140 <br /> i <br /> laboratory Control Sample(3030057-BSI) Prepared 03/05/03 Analyzed 03/06/03 <br /> Benzene 23 9 050 ug/l 25 0 96 70-130 "_...__.-.._.. <br /> tluene 290 050 " 25 0 116 70-130 <br /> ethyl terl-butyl ether 25 5 20 25 0 102 60-140 <br /> rrogate 11-DCA-d4 261 250 104 60-140 <br /> rt ogate Toluene d8 288 250 115 60-140 <br /> Surrogate 4-BFB 256 250 102 60-140 <br />+r <br /> 1a Analytical - Sacramento The r esults to this i epor i apply to the samples analyzed to accoi dance with the chain of <br /> custody document Unless otherwise stated results me t eporied on a wet werght basts <br /> IThis analrtrcal i epos i must be r epi oduced to its entirety <br /> Page 103 of 126 <br /> r <br />