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Sequoia 819 Striker Ave Ste 8 <br /> Sacramento,CA 95834 <br /> L <br /> a- ) Analytical FAX(916)921-9600 <br /> (916)921-0100 <br /> www.sequoialabs.com <br /> i <br /> Geological Technics,Inc. Project: Cardoza <br /> bn 5405064 <br /> 1101 7th Street Project Number: '1135.2 Reported: <br /> Modesto CA,95354 Project Manager: Jenny Weese 06/15/04 15:19 <br /> Gasoline\BTEX\Ox enates b EPA method 8260B- Quality Control <br /> Yg Y Y <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> r Batch 4050170-EPA 5030B [P/T} <br /> Matrix Spike(4050170-MSI) Source:S405244-04 Prepared&Analyzed:05/13/04 <br /> Methyl tert-butyl ether 9.81 0.50 ug/1' 8.64 0.59 107 60-140 <br /> L Benzene 4;69 0.50 11 .5.36 ND 88 70-130 <br /> Toluene 33.1 0.50 30.3 ND 109 70-130 <br /> Gasoline Range Organics(C4-C)2) 402 50 440 ND 91 60-140 . <br /> Surrogate:Toluene-d8 10.6 II 10,0 706 60-140 <br /> Surrogate:4-BFB 10.3 10.0 103 60-140 <br /> Surrogate:1,2-DCA-d4 9.79 10.0 98 60-140 <br /> r Matrix Spike Dup(4050170-MSDI) Source:S405244-04 Prepared&Analyzed:05/13/04 <br /> Methyl tert-butyl ether 9.62 0.50 ug/l 8.64 0.59 105 60-140 2 25 <br /> Benzene 4.55 0.50 5.36 ND 85 70-130 3 25 <br /> Toluene 32.1 0.50 30.3 -ND 106 70-130 3 25 <br /> Gasoline Range Organics(C4-C12) 381 50 440 NO 87 60-140 5 25 <br /> Surrogate:Toluene-d8 10.4 10.0 104 60-140 <br /> Surrogate:4-BFB 10.4 10.0 104 60-140 <br /> r Surrogate:1,2-DCA-d4 9.79 10.0 98 60-140 <br /> {r�r Batch 4050217-EPA 5030B [MeOH] <br /> Blank(4050217-BLKI) Prepared'05/16/04 Analyzed:05/17/04 <br /> Tert-butyl alcohol ND 2.5 mg/kg <br /> Methyl tert-butyl ether ND 0.25 <br /> Di-isopropyl ether ND 0.25 " <br /> Ethyl tert-butyl ether ND .0.25 <br /> Tert-amyl methyl ether ND 0.25 <br /> 1,2-Dichloroethane ND 0.25 " <br /> 1,2-Dibromoethane(EDB) ND 0.25 " <br /> Benzene ND 0.25 <br /> Ethylbenzene ND 0.25 <br /> Toluene ND 0.25 " <br /> Xylenes(total) ND 0.50 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate:1,2-DCA-d4 0.00983 0.0100 98 60-140 <br /> Surrogate:Toluene-d8 0.0106. 0.0100 106 60-140 <br /> Surrogate:4-BFB 0.0101 0.0100 10/ 60-140 <br /> �+ <br /> Sequoia Anal ictal-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> Q Yt <br /> custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> R This analytical report must be reproduced in its entirety.. <br /> {moi Page 15 of 19 <br />