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Sequoia 819 Striker Ave Ste 4 <br /> Sacramento, 92 99600 <br /> Analytical (916)921-9600 <br /> y� FAX(93 of labs co 0 <br /> www sequoialabs tom <br /> Gettler-Ryan -Dublin Project Former Unocal 5098, Stockton,CA 5302592 <br /> 6747 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 03/10/03 17 17 <br /> Gasollne\BTEXIQxygenates by EPA method 8260E - 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 3030057-EPA 5030B IP/Tl <br /> Matrix S_ptke(3030057-MSI;) _ Source S302588-03 Prepared 03/05/03 Analyzed 03/06/03- <br /> Benzene 23 7 0 50 ug/l 25 0 ND 95 70-130 <br /> Toluene 27 8 050 25 0 ND IH 1 70-130 <br /> Methyl tert-butyl ether 25 2 2 0 25 0 ND 101 60-140 <br /> Suit agate 12-DCA-d4 16 9 25 0 108 60-140 <br /> Surrogate Toluene-d8 28 6 250 114 60-140 <br /> Sur rogate 4-BFB 14 5 15 0 98 60-140 <br /> Matrix Spike Dup(3030057-MSDI) Source 5302588-03 Prepared 03/05/03 Analyzed 03/06/03 <br /> Benzene 232 050 ug/l 25 0 ND 93 70-130 2 25 - <br /> Toluene 25 1 050 25 0 ND 100 70 130 10 25 <br /> Methyl tert-butyl ether 254 2 0 25 0 ND 102 60-140 08 25 <br /> Surrogate 1 2 DCA-d4 179 15 0 112 60 140 <br /> Surrogate Toluene-d8 18 0 15 0 111 60 140 <br /> Sur i agate 4 BFB 24.5 25 0 98 60-140 <br /> Batch 3_030088-EPA 50308 jPITJ - <br /> =--Blank(3030088-BLKI)____ __ __— Prepared& Analyzed 03/06/03 _ - — ---- — —� <br /> Benzene ND 050 ug/1 <br /> -- Toluene - - - -- - - - - _ - ND ---0 50--- -- ----�-------------- - --- - <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 050 " <br /> _ Methyl tert-butyl ether - `- -- ND _ _ _ _ -2 0--_ <br /> Surrogate 1 1-DCA d4 181 15 0 113 60-140 - <br /> Surrogate Toluene-d8 186 250 114 60-140 <br /> Suri agate 4-BFB 14 4 15 0 98 60-140 <br /> Sequoia Analytical - Sacramento The results in this repoi t apply to the samples analyzed in actor dance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis W <br /> This analytical repot t must be rept oduced in tis enter ery <br /> Page 102 of 126 <br />