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te 8 <br /> Sequoia 61 nAve 5934 <br /> Sacramento <br /> CA 95634 <br /> (916)921 9600 <br /> Analytical FAX(916)921-0100 <br /> www sequaialabs corn <br /> Gettler-Ryan -Dublin _ Project Former Unocal 5098,Stockton,CA 5308091 <br /> 6747 Sierra Court,Ste 3 Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 08/20/03 16 56 _ <br /> Gaso11ne1BTEX\Oxygenates 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 Lirrut Notes <br /> Batch 30801141 --EPA 5030B JP/T <br /> Blank(3080141-BLKI) Prepared 08/12/03 Analyzed 08/13/03 ' <br /> Benzene ND 0 50 ug/l <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 12-DCA-d4 264 25 0 106 s 60-140 i <br /> I <br /> Surrogate Toluene-d8 249 25 0 100 60-140 I <br /> Surrogate 4-BFB 264 250 106 60-140 - - <br /> Laboratory Control Sample(3080741-BSI) Prepared 08/12/03 Analyzed 08/13/03 ' <br /> Benzene 258 0 50 ug/1 25 0 103 70-I30 <br /> Toluene 24 9 0 50 25 0 - 100 70-130 <br /> Methyl tert-butyl ether 25 9 20 25 0 104 60-140 <br /> Surrogate 12-DCA-d4 275 25 0 110 60-140 <br /> Surrogate Toluene-d8 249 25 0 100 60-140 <br /> Sur?oeate 4-BFB 27 7 25 0 111 Fill-140 <br /> Matrix Spike (3080141-MSI) Source 5308091-30 _ Prepared 08/12/03 Analyzed 08/13103` _ �® <br /> Benzene 25 4 0 50 u9/1 25 0 ND 102 70-130 <br /> Toluene _ 24_6 0_50_ 250 ND-98__ 70_730_ <br /> _ Methyl tent-butyl ether T - - - _ T 25 6 20 25 0 TND 102 60-140 - <br /> Surrogate 12-DCA-d4- -259; " - - -- - " -- 25 0- - - - -104 -- 60-140 <br /> _ Surrogate Toluene-d8 24 7 250 99 60-140 <br /> Surrogate 4-BFB 26 3 15 0 105 60-140 <br /> --`"Matrix Spike Dup(3080141-MSD1)—- _Source S308091=30-' {" W Prepared`08/12/03 Analyzed 08/13/03 <br /> Benzene 24 7 050 ugA 25 0 ND 99 70-130 3 25 ' <br /> Toluene 23 2 050 25 0 ND 93 70-130 6 25 <br /> Methyl tert-butyl ether 269 2 0 25 0 ND 108 60-140 5 25 <br /> T Surrogate 12-DCA-d4 268 25 0 107 - 60 140 <br /> Surrogate Toluene-d8 24 6 250 98 60-140 - <br /> Surrogate 4-BFB 28 4 25 0 - 114 60-140 <br /> Sequoia Analytical- Sacramento The results to this report apply to the samples analyzed in accot dance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight bast' <br /> This analytical report must be reproduced in its entirety <br /> Page 96 of 117 <br />