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819 Sinker Ayc Ste 8 <br /> KD <br /> Sequoia Sacramento,CA 95834 <br /> Analytical (916)92] 9600 <br /> FAX(915)921-0100 <br /> www sequoialabs cam <br /> Gettler-Ryan-Dublin Project Unocal 5098,Stockton,CA S210010 <br /> 6747 Sierra Court,Ste 3 Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 10/14/02 18 46 <br /> Gaso11ne1BTEXIQxygenates 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 2100083 -EPA 5030B JP/TJ <br /> Laboratory Control Sample 2100083-BSI _ Prepared&Analyzed 10/04/02 - <br /> Matrix Spike (2100083-MSI) Source S210010-28 Prepared&Analyzed 10/04/02 <br /> Methyl tent-butyl ether 283 0 50 ugA 25 0 ND 113 60-140 <br /> Benzene 287 050 25 0 20 107 70-130 <br /> Toluene 269 050 250 ND 106 70-130 <br /> Surrogate Toluene-d8 272 250 109 60-140 <br /> Surrogate 4-BFB 261 250 104 60-140 <br /> Surrogate 12-DCA-d4 281 250 112 60-140 <br /> Matrix Spike Dup (2100083-MSD1) Source S210010-28 Prepared'&Analyzed_ IW04102 _ <br /> Methyl tert-butyl ether 282 - 050 ug/l 25 0 ND 113 60-140 04 25 <br /> Benzene 274 050 250 20 102 70-130 5 25 <br /> Toluene 250 050 250 ND 99 70-130 7 25 <br /> Surrogate Toluene-d8 278 2.50 111 60-140 <br /> Surrogate 4-BFB 279 250 111 60-140 <br /> Surrogate 1;2-DCA=d4 284 25 0— 1146011 40 T- —- - - ---- - <br /> _ Batch 2100085-EPA 5030B iP/T]--- - - _� ------- - - ----- _ ----- - - - - - --- - —� <br /> Blank(2100085-SLK) _ Prepared&Analyzed 10/05/02 <br /> Ethanol ND 50 ug/l <br /> Tert-butyl alcohol ND so " <br /> Nlethyltert-butyl ether �_..�ND 050 <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether __ ND _ 050 - <br /> Tert-amyl methyl ether ND 050 _ <br /> 1,2-Dichloroethane ND 050 <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Benzene ND 050 " <br /> Ethylbenzene ND 050 <br /> Toluene _ ND 050 <br /> Xylenes(total)---- _ - ND- __- -0 SD <br /> Surrogate Toluene-d8 225 250 90 60-140 <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basic 0. <br /> This analytical report must be reproduced in its entirety <br /> Page 95 of 1 19 , <br />