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919 Striker Ave Ste 8 <br /> 4Z) <br /> Sequoia Sacramento,CA 95934 <br /> Analytical (916)921 9600 <br /> iftgwvFAX(916)92I-0]00 <br /> www sequoialabs com <br /> Gettler-Ryan-Dublin Project Unocal 5098,Stockton, CA 5210010 <br /> 6747 Sierra Court, Ste J Project Number N/A Reported <br /> Dublin CA,94568 Protect Manager Deanna L Harding 10/14/02 1$46 <br /> Gasoline\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 ]Votes <br /> Batch 2100066- EPA 5030B (P/T] <br /> Blank(2100066-BLKI) Prepared&Analyzed 10/03/02 <br /> Ethanol ND 50 ug/1 <br /> Tert-butyl alcohol ND 50 " <br /> Methyl cert-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-Dibroinoethane(EDB) ND 050 " <br /> Benzene ND 0 50 " <br /> Ethylbenzene ND 0 50 ' <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate Toluene-d8 28 6 250 114 60-140 <br /> Suri ogate 4-BFB 279 250 111 60-140 <br /> Sur rogate 1 2-DCA-d4 26 7 250 107 60-140 <br /> Laboratory Control Sample(2100066-BSI) Prepared&=Analyzed--10/03/02 --- —__ _- <br /> Methyl tert-butyl ether 248 0 50 ug/1 25 0 99 60-140 <br /> Benzene - - --------- --24 6--- -0 SD- - -- 25 0-—---- —98- 70-130 - — - -- <br /> Toluene 25 1 0 50 250 100 70-130 <br /> Surrogate Toluene-d8 28 7 15 0 115 60-140 <br /> _Surrogate 4-BFB_ 279 25 0 111 _60-140 <br /> Surtogale�12-DCA-d4� 26 6�_. - a -- - „ - ZS 0 _ �- _ 106 60-I40SF__ <br /> Matrix Spike(2100066-MS1)- Source S2100I0-06 Prepared&Analyzed 10/03/02 <br /> Methyl tert-butyl ether 25 0 050 ag/1 25 0 ND _ 100 60-140 <br /> Benzene 31 1 0 50 25 0 7 7 94 70-130 <br /> Toluene 296 050 25 0 5 8 95 70-130 <br /> Surrogate Toluene-d8 276 250 110 60-140 <br /> Surrogate 4-BFB 274 - " 25 0 110 60-140 <br /> Surrogate 1 2-DCA-d4-- - __�_ -268 - - - " 250--- - - 107 60-140 <br /> Sequoia Analyhcal - 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 basis <br /> This analytical report must be reproduced in its entirety <br /> Page 93 of 119 ' <br />