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819 Sinker Ave Ste 8 <br /> Sequoia Sacramento CA 95914 <br /> (916)921 9600 <br /> " ► Analytical FAX(916)921-0100 <br /> www sequotalabs corn <br /> er-Ryan-Dublin Project Former Unocal 5098,Stockton,CA 5302592 <br /> 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\BTEXIOxygenates by EPA method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> 7Analyte Result Limit Units Level Result %REC limits RPD Limit Notes <br /> Uatrb 3020415-EPA 5030B [P/T <br /> Blank(3020415-BLKI) Prepared&Analyzed 02/28/03 <br /> nzene ND 050 U811 <br /> luene ND 050 <br /> Ethylbenzene ND 050 " <br /> f <br /> lenes(total) ND 050thyl ten-butyl ether ND 2 0 <br /> tri ogate 1 1-DCA-d4 14 0 2.50 96 60-140 <br /> irogate 7'oluene-d8 28 7 25 0 115 60 140 <br /> riogate 4-BFB 263 250 Ila 60 140 <br /> aboratory Control Sample(3020415-BSI) Prepared&Analyzed 02/28/03 <br /> enzene 240 050 u8/1 25 0 96 70-130 <br /> Otert-butyl <br /> 266 050 250 106 70-130 <br /> ether 229 20 25 0 91 60-140 <br /> Sur?ogale 1 1-DCA-d4 23 7 25 U 95 60149 <br /> Uriogate ogate Toluene-d8 284 25 0 114 6a-140 <br /> 4-BFB 271 <br /> 150 108 60-140 <br /> Matrix Spike(3020415-MSI) Source_ 5302592-23 Prepared&Analyzed 02/_28/03 <br /> enzene 248 050 u - <br /> g11 25 0 1 0 9 5 70 130 <br /> Toluene 267 050 250 075 104 70-130 <br /> /ethyl terl-butyl ether 23 1 2 0 250 ND 92 60-140 <br /> Sw r ogale 12 DCA-d4 239 25 U 96 60-140 <br /> ?rogate Toluene-d8 17 7 2-50 111 60-140 <br /> itogale 4-BFB 270 250 108 60-140 <br /> atria Spike Dup(3020415-MSDI) Source S302592-23 Prepared&Analyzed 02/28/03 <br /> enzene 248 050 ug/l 25 0 1 0 95 70-130 0 25 <br /> Toluene 250 050 25 0 0 75 97 70-130 7 25 <br /> ethvl tart-hutvl ether 23 6 2 0 " 250 ND 94 60 '410 2 25 <br /> ur rogate 12-DCA-d4 253 25 0 101 60-140 <br /> ut?ogale Toluene-d8 275 250 110 60 140 <br /> �1a Analytical - Sacramento The?esults in this report apply to rhe samples analyzed in accordance wah the chain o/ <br /> custody document Un less otherwise stated results at e reported on a wet weight basis <br /> This analytical report must be ropt oduced tri its entirety <br /> Page 99 of 126 <br />