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Sequoia $ram Sinker <br /> CA 5934 <br /> Ste F <br /> 1�& <br /> Sacramento,CA 95834 <br /> Analytical (916)921-9600 <br /> FAX(916)42 i-0100 <br /> www sequoialabs com <br /> Gettler-Ryan-Dublin Project Unocal 5098,Stockton,CA S210010 <br /> 7 Sierra Court,Ste J Project Number N/A Reported <br /> in CA, 94568 Project Manager Deanna L Harding 10/14/02 18 46 <br /> Casoline1BTEXIQxygenates 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 /> teb 2100066-EPA 5030B (P/T] <br /> atrix Spike Dup(2]00066-MSD]) Source 5210010-06 Prepared&Analyzed 10/03/02 <br /> Methyl tert-butyl ether 243 050 ug/1 250 ND 97 60-140 3 25 <br /> nzene 295 050 250 77 <br /> 87 70-130 5 25 <br /> Iluene 298 050 250 58 96 70-130 07 25 <br /> rogato Toluene-d8 279 2.50 111 60-140 <br /> rogate 4-BFB <br /> 277 2.50 111 60-140 <br /> Surrogate 1,2-DCA-d4 256 250 102 60-140, <br /> Itch 2100083 -EPA 5030B P/T <br /> nk(2100083-BLK1) Prepared&Analyzed 10/04/02 <br /> Snol ND 50 ug/l <br /> -butyl alcohol ND 50 <br /> Methyl tert-butyl ether ND 050 " <br /> py]ether ND 050 <br /> rk-butyl ether ND 050 <br /> Tert-amyl methyl ether ND 050 " <br /> ichloroethane ND 050 <br /> tDibromoethane <br /> (EDB) ND 050 <br /> Benzene AD 050 " <br /> f <br /> lbenzene ND 050 " <br /> ene ND 050 <br /> Xylenes(total) ND 050 " <br /> ogate Toluene-d8 270 250 JDs 60-140 <br /> rrogate 4-BFB 268 250 107 60-140 <br /> Surrogate 12-DCA-d4 285 250 114 60-140 <br /> foratog Control Sam le2100083- <br /> ( BSl) Prepared&Analyzed 10/04/02 <br /> thy]tent-butyl ether 28 1 050 ug/l 250 112 60-140 <br /> ene <br /> 257 050 25 0 103 70-130 <br /> ene 25 9 050 25 0 104 70-130 <br /> ogate Toluene-d8 281 250 112 60-140 <br /> ogate 4-BFB 278 250 111 60-140 <br /> urrogate 1 2-DCA-d4 284 25 0 114 60-140 <br /> cola 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 to its entirety <br /> Page 94 of 119 <br />