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819 Stnker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4D (916)921-9600 <br /> Analytical FAX(916)92 1 <br /> www sequoialabs labs cam <br /> SE=Kilgor <br /> ncho Cordova Project Tosco 1205,Lathrop,CA <br /> 301100 Project Number NIA Reported <br /> Ran0 Project Manager Rusty Bettkosky 06/14/02 11 2$ <br /> Gasollne\BTEXIOxygenates 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 /> I <br /> Batch 2060131 -EPA 5030B PIT] <br /> Blank(2060131-BLKI) Prepared&Analyzed 06/12/02 <br /> Ethanol ND 020 mg/kg <br /> Tert-butyl alcohol ND 0 050 <br /> Methyl tent-butyl ether ND 00050 " <br /> Di isopropyl ether ND 00050 " <br /> Ethyl tert-butyl ether ND 00050 " <br /> Tert-amyl methyl ether ND 00050 " <br /> 1,2-Dtcbloroethane ND 00050 " <br /> 1,2-Dtbromoethane(EDB) ND 00050 <br /> Benzene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Toluene ND 00050 " <br /> Xylenes(total) ND 00050 <br /> Gasoline(C6 C 10) ND 1 0 " <br /> gate 12-DCA-d4 00494 00500 99 60-740 <br /> arrogate Toluene-d8 00514 " 00500 103 60-140 <br /> Surrogate 4-BFB 00576 00500 115 60-140 <br /> LCS(2060131-BSI) Prepared&Analyzed 06/12/02 <br /> Methyl tert-butyl ether 00426 00050 mg/kg 00436 98 60-140 <br /> Benzene 00272 00050 00268 101 70-130 <br /> Toluene 0 177 00050 0 162 109 70-130 <br /> Gasoline(C6-C10) 201 10 220 91 70-130 <br /> Surrogate 12-DC,4-d4 00493 00500 99 60-140 <br /> Surrogate Toluene-d8 00509 00500 101 60-140 <br /> Surrogate 4-BFB 00524 00500 105 60-140 <br /> Matrix Spike(2060131-MSI) Source 5206140-06 Prepared 06/12/02 Analyzed 06/13/02 <br /> Methyl tent-butyl ether 00415 00050 mg/kg 00436 ND 95 60-140 <br /> Benzene 00279 00050 00268 ND 104 60-140 <br /> Toluene 0 184 00050 0 162 ND 113 60-140 <br /> Gasoline(C6-C10) 2 10 10 220 ND 95 60-140 <br /> Surrogate 1 2-DCA-d4 00475 00500 95 60-140 <br /> Surrogate Toluene-d8 00513 oo00500 103 60-140 <br /> Surrogate 4-BFB 00532 " 00500 106 60-140 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed to accordance with the chatty of <br /> custody document This analytical report must be reproduced In its entirety <br /> Page Page 8 of 12 <br />