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(D (91819 Striker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> Analytical FAX <br /> 6)921-9600 <br /> vW (916)921 of 06 <br /> www Sequoialabs com <br /> Gettler-Ryan-Dublin Project Unocal 5098,Stockton, CA S210010 <br /> 6747 Sierra Court, Ste J Project]dumber NIA Reported <br /> Dublin CA, 94568 Project Manager Deanna L Harding 10/14/02 18 46 <br /> Gasoline\BTEXIOxygenates 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 /> Batch 2100111 -EPA 5030B EP/Tl <br /> Matrix Spike(2100111-MSI) Source S210010-17 Prepared&Analyzed 10/08/02 <br /> Methyl tert-butyl ether 32 1 050 ug/1 250 ND 128 60-140 <br /> Benzene 547 050 1125 0 33 87 70-130 <br /> Toluene 399 0 50 250 18 84 70-130 <br /> Surrogate Toluene-d8 269 2.50 108 60-140 <br /> Surrogate 4 BFB 279 250 111 60-140 <br /> Surrogate I 1 DCA-d4 304 25 0 111 60-140 <br /> Matrix Spike Dug (27.00111-MSDI) _ Source S21001€I-17 Prepared&Analyzed 10/08/02 <br /> Methyl tert-butyl ether 326 050 ug/l 250 ND 130 60-140 2 25 <br /> Benzene $34 050 25 0 33 82 70-130 2 25 <br /> - Toluene 38 8 050 ,._.-._..., .250 18 83 -., 70-130 0 3 25 -_- <br /> Sun ogate Toluene-d8 278 25 0 111 60-140 <br /> Surrogate 4-BFB 263 250 105 60-140 <br /> Ciirrnpnntn 1 7-f�C A-d4 <br /> 166 " ?in t 7] 6n inn <br /> Batch 2100173 -EPA 5030B (P/TJ <br /> Blank'(2100173-BLKI) Prepared&Analyzed 10/09/02 <br /> Ethanol-- _ _-_-- -- _ -ND -- -- _50 ug/I - -_- _ - -- <br /> Tert-butyl alcohol ND 5 0 " <br /> Methyl tert-butyl ether ND 050 <br /> Di-isopropyl ether _ ND ___050-- <br /> Ethyl <br /> .._050 Ethyl tert-butyl ether ND 050 <br /> Tert-amyl methyl ether ND 050 <br /> -- 1,2 Dichloroethane - - ND- - 050- <br /> I <br /> 50-1 2-Dibromoethane(EDB) ND 050 " <br /> Benzene ND 050 <br /> Ethylbenzene ND 050 " <br /> Toluene ND 050 " <br /> -Xylenes(total) µ ND 050 <br /> Surrogate Toluene-d8- --- - -- ---- - 171 — - -- - - - - 250- --- - -108 - 60-140 - -- - - <br /> Surrogate 4-BFB 264 15 0 106 60-140 <br /> Suri ogate 1 1-DCA-d4 270 250 108 60-140 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of lip, <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 99 of 119 , <br />