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ker <br />�� Sequoia 81amnto,CA 58 4 <br /> Sacramento,CA 95834 <br /> (916)921 9600 <br /> Analytical FAX(916)921 0100 <br /> www sequoialabs com <br /> OU <br /> er-Ryan-Dublin Project Former Unocal 5098,Stockton,CA S302592 <br /> Sierra Court, Ste J Project Number NIA Reported <br /> in CA,94568 Project Manager Deanna L. Harding 03/10/03 17 17 <br /> GasolinelBTEXIOxygenates 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 /> etch 3030099-EPA 5030E JP/T) <br /> OR <br /> Matrix S Ike(3030099-MSI) Source 5302592-31 Prepared 03/06/03 Analyzed 03/07/03 <br /> enzene 258 050 ug/] 250 19 96 70-130 <br /> alum, 236 050 25 0 NO 94 70-130 <br /> ethyl tert-butyl ether 243 2 0 25 0 NO 97 60-140 <br /> trrogate 11-DCA-d4 284 250 114 60-140 <br /> rrogate Toluene-d8 268 250 107 60 140 <br /> Suitogate 4-BFB 251 250 100 60-140 <br /> tatrix Spike Du„ (3030099-MSD1) Sou„r.ce 5302592-31 Pre- ared 03/06/03 Analyzed 03/07/03 <br /> Benzene 26 6 050 ug/l 25 0 1 9 99 70-130 3 25 <br /> Wene 224 050 25 0 NO 90 70 190 5 25 <br /> ethyl tert butyl ether 26 9 2 0 25 0 NO 108 60-140 10 25 <br /> to 1 2-DCA-d4 308 ” 250 123 60-140 <br /> gate Toluene-d8 277 250 111 60-140 <br /> Surrogate 4-BFB 250 25 0 100 60-140 <br /> i <br /> 1a Analytical - Sacramento The t esults in this report apply to the samples anal3ned in accordance with the chain of <br /> custody document Unless otherwise stated results ore)eported on a wet weight basis <br /> This analytical r eport must be;epi oduced in its entuety <br /> Page 105 of 126 <br />