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/I • 819 Striker Ave Ste 8 <br /> j Sequoia CA 95834 <br /> (916)921-9600 <br /> r Analytical FAX(916)921-0100 <br /> www.sequoialabs.com <br /> i� <br /> Geological Technics,Inc. Project: Cardoza S405064, <br /> 1101 7th Street Project Number: 1135.2 Reported. <br /> rModesto CA,95354 Project Manager:_Jenny Weese 06/15/04 15:19 <br /> Gasoline\BTEX\Oxygenates by EPA method 8260B-,Quality Control <br /> Sequoia Analytical- Sacramento <br /> L <br /> Reporting Spike Source %REC RPD <br /> JAnalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4050170-EPA 5030B [P/T] <br /> Blank(4050170-BLKI) Prepared:05/12/04 Analyzed:05/13/04 <br /> Tert-butyl alcohol ND 5.0 ug/1 <br /> Methyl cert-butyl ether ND 0.50 " <br /> Di-isopropyl ether <br /> ND <br /> 0.50 <br /> Ethyl cert-butyl ether ND 0.50 <br /> r Tert-amyl methyl ether ND 0.50 " <br /> {ki 1,2-Dichloroethane ND 0.50 <br /> 1,2-Dibromoethane(EDB) ND 0.50 <br /> Benzene ND 0.50 <br /> Ethylbenzene ND 0.50 <br /> Toluene ND 0.50 j <br /> Xylenes(total) ND 0.50 " <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Surrogate:Toluene-d8 10.5 10.0 105 60-140 <br /> Surrogate:4-BFB 10.1 10.0 101 60-140 <br /> Surrogate:1,2-DCA-d4 10.2 10.0 102 60-140 <br /> Laboratory Control Sample(4050170-BSI) Prepared&Analyzed:05/12/04 <br /> Methyl tert-butyl ether 8.58 0.50 ug/l 8.64 99 60-140 <br /> Benzene 4.77 0.50 5.36 89 70-130 <br /> Toluene 31.6 0.50 30.3 104. 70-130 <br /> Gasoline Range Organics(C4-C12) 387 50 440 88 70-130 <br /> Surrogate.Toluene-d8 10.3 10.0 103 60440 <br /> tri <br /> Surrogate:4-BFB 10.2 10.0 102 60-140 <br /> Surrogate:1,2-DCA-d4 10.2 10.0 102 60-140 <br /> Laboratory Control Sample Dup(4050170-BSD1) Prepared:05/12/04 Analyzed:05/13/04 <br /> r Methyl cert-butyl ether 8.69 0.50 ' ug/1 8.64 101 60-140 1 25 <br /> Benzene 4.82 0.50 5.36 90 70-130 1 25 <br /> Toluene 32.6 0.50 30.3 108 70-130 3 25 <br /> Gasoline Range Organics(C4-C12) 393 50 440 89: 70-130 2 25 <br /> Surrogate:Toluene-d8 10.2 10.0 102 60-140 <br /> Surrogate:4-BFB 10.2 "' 10.0 102 60-140 <br /> Surrogate:1,2-DCA-d4 9.98 10.0 100 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> 9 Yt <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 /> o <br /> 14 f 19 <br /> • Page � <br /> I <br />