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•� 819 Sinker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> Analytical FAX <br /> 921-9600 <br /> (916)921-0100 <br /> ettler-Ryan-Dublin Project Former Unocal 5098,Stockton,CA S212135 <br /> 6747 Sierra Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Har(hng 12/27/02 14 14 <br /> GasolinelBTEXIOxygenates by EPA method 8260B-Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Ana] a Result Limit Units Level Result %REC Limits RPD Lirmt Notes <br /> Batch 2120229-EPA 5030B [PIT] <br /> Matnx Spike(2120229-MSI} Source 5212307-04 Prepared&Analyzed 12/13/02 <br /> Surrogate 4-BFB 224 ug/7 250 90 60-140 <br />' Matrix SIRike Da 2120229-MSD1 Source 5212307-04 PLej2ared&Analyzed I2/13/02 <br /> Benzene 118 0 50 ugll 13 6 ND 87 70-130 8 25 <br /> Toluene 745 0 50 " 83 4 ND 89 70-130 18 25 <br /> Methyl tert-butyl ether 23 2 20 224 ND 100 60-140 4 25 <br /> Gasoline(C6-C1O) 1090 50 1100 ND 98 60-140 8 25 <br /> Surrogate Toluene-d8 267 250 107 60-140 <br />' Surrogate 4-BFB 216 250 86 60-140 <br /> 1 <br />' Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 83 of 102 <br />