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819 Striker Ave Ste$ <br /> 4D— (916)Sequoia Sacramento,CA 95834 <br /> Analytical FAX 921-960p <br /> mWAW (9]6)921 0]Op <br /> www sequoialabs com <br /> Gettler-Ryan-Dublin Project Unotal 5098,Stockton,CA 5210010 <br /> 6747 Sierra Court,Ste J ProlectNumber N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 10/14/02 1141 <br /> GasollnclBTEXIOxygenates 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 2100088-EPA 5030B (P/TJ <br /> Blank(2100088-BLK1) - Prepared 10/05/02 Analyzed 10/06/02 - <br /> Ethanol ND 50 ug/1 <br /> Tert-butyl alcohol ND 50 " <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 <br /> Ethyl cert-butyl ether ND 050 " <br /> Tet;t-amyi methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Benzene ND 050 " <br /> Fthylbenzene ND _ 050 _ <br /> Toluene r ND 0 50 " <br /> Xylenes(total) 0 800 050 " <br /> Surrogate Toluene-d8 16 6 250 106 60-140 <br /> Surrogate 4-BFB 26 7 25 0 107 60 140 <br /> Surrogate 1 2-DC4-d4 273 2-50 149 60 140 <br /> Laboratory-Control Sample(2100088-BSI) —Prepared t]0/05/02-Analyzed =10/06/02— -_ _--— <br /> Methyl tent-butyl ether 242 050 ugA 25 0 97 60-140 <br /> —Benzene - - —---- -- ---= --24 2---_-0 50•-x" ---25 0 ---97----70-130-- ----- - - -- <br /> - Toluene 21 4 0 50 25 0 86 70-130 <br /> Surrogate Toluene-d8 208 250 83 60-140 <br /> Surrogate 4-BFB 165 250 66 60-1_40_ <br /> --216 - --_ "� � 254-�- ��- 90 � 60-140 <br /> Matrix Spike(2100088-MS1) _ •••_, •__... Source S_210070-12 _ - Prepared 10/05102 Analyzed 10/06102` - - <br /> �3 <br /> Methyl tert-butyl ether 269 050 ugll 25 0 ND 108 60-140 <br /> Benzene 300 050 25 0 078 117 70-130 <br /> Toluene 28 5 0 50 25 0 ND 113 70-130 <br /> Surrogate Toluene-d8 290 250 116 60-140 <br /> Surrogate 4-BFB- - 297 "- 25 0 119 60-140 <br /> --Surrogate 12-DCA-d4 - - -_ -- -_ -184 -- -- -"------250- - -- -114- -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 esults are repoi ted on a wet weight basis G. <br /> This analytical report must be reproduced in its entiret)p <br /> Page 97 of 119 <br />