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819 Stoker Ave Ste <br /> Sequoia Sacramento CA 95634 <br /> (9S6)92]-96000 <br /> D— FAX <br /> 16) <br /> 100 <br /> Analytical w-wse uoiala Oom <br /> wwu�sectuo�ala6s com <br /> Gettler-Ryan-Petaluma Project Tosco 11192,Stockton,CA S306465 <br /> 1364 N McDowell Blvd Ste 132 Project Number N/A Reported <br /> Petaluma CA,94954 Protect Manager Dave Vossler 07/09/03 18 23 <br /> GasolinelBTEXIOxygenatcs 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 3070038-EPA 5030BJP/T] — — — — 4 � - - — - —— --------—-- - -- <br /> Matrix Spike Dup(3070038-MSD1) Source S306532-02 Prepared&Analyzed 07/02/03 <br /> Methyl tert butyl ether 23 6 050 ug/I 224 ND 105 60-140 11 25 <br /> Benzene 112 0 50 13 6 ND 82 70-130 7 25 <br /> Toluene 69 2 0 50 83 4 ND 83 70-130 9 25 <br /> Gasoline(C6 CIO) 777 50 1100 ND 71 60-140 14 25 <br /> Surrogate Toluene-d8 238 25 0 95 60-140 <br /> Surrogate 4 BFB 252 25 0 101 60-140 <br /> Surrogate 12 DCA-d4 274 25 0 110 60-140 <br /> Batch 3070119-EPA 5030EJP/TJ <br /> Blank(3070119-BLKI) Prepared&Analyzed 07/07/03 <br /> Tert-butyl alcohol ND 5 0 ug/I <br /> Methyl tert-butyl ether ND 0 50 " <br /> .Benzene ND 0 50 " <br /> Ethylbenzonc ND 050 <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate Toluene-d8 22 6 250 90 60-140 <br /> Sur)ogate 4 BFB 222 2.50 89 60-140 <br /> Surrogate 12-DC.4-d4 202 250 81 60-140 <br /> i <br /> Laboratory Control Sample(3070119-BSI) Prepared&Analyzed 07/07/03 <br /> Methyl tert butyl ether 166 050 ug/I 248 67 60-140 <br /> Benzene 13 6 050 160 85 70-130 <br /> Toluene 86 4 050 74 2 116 70-130 <br /> Gasoline(C6-CIO) 1210 50 1100 110 70-130 <br /> Suri ogate Toluene-d8 228 250 91 60-140 <br /> Surrogate 4 BFB 23 6 250 94 60-140 <br /> Surrogate 1 2-DCA-d4 194 250 78 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 i esulls are repot ted on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 6 of 7 <br />