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Sequoia 819 Strikcr Ave Ste 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www.sequoialabs.com <br /> Geological Technics,Inc. Project: Cardoza S405064 <br /> 1101 7th Street Project Number. 1135.2 Reported: <br /> Modesto CA,95354 Project Manager: Jenny Weese 06/15/04 15:19 <br /> Li Gasoline\BTEX\Oxygenates by EPA1 method 8260B-:Quality Control <br /> Sequoia Analytical - Sacramento <br /> fri Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4050328-EPA 5030B [P/Tl <br /> Matrix Spike(4050328-MSI) Source:S405064-01REI Prepared&Analyzed:06/08/04 <br /> Methyl tert-butyl ether 0.0380. 0.0050 mg/kg 0.0432 ND 88 60-140 <br /> L Benzene 0.0209 0.0050 " 0.0268 0.00051 76 60-140 <br /> Toluene 0.124 0.0050 0.152 0.00084 81 60-140 <br /> Gasoline Range Organics(C4-C12) 1.48 1.0 2.20 ND 67 60-140 <br /> Surrogate:1,2-DCA-d4 0.0115 0.0100 115 60-140 <br /> Surrogate:Toluene-d8 0.00925 0.0100 92 60-140 <br /> Surrogate:4-BFB 0.00868 0.0100 87 60-140 <br /> Matrix Spike Dup(4050328-MSDI) Source:5405064-01RE1 Prepared&Analyzed:06/08/04 <br /> Methyl tert-butyl ether 0.0329 0.0050 mg/kg 0.0432 ND 76 60-140 14- 25 <br /> Benzene 0.0191 0.0050 .0.0268 0.00051 69 60-140 9 25 <br /> Toluene 0.115 0.0050 0.152 0.00084 75 60-140 8 25 <br /> Gasoline Range Organics(C4-C12) 1.29 - 1.0 I 2.20 ND 59 60-140 14 25 QM02 <br /> Sunogate:l,2-DCA-d4 0.00968 0.0100 .97 60-140 <br /> Surrogate:Toluene-d8 0.00947 0.0100 ,95 60-140 <br /> Surrogate:4-BFB 0.00930 0.0100 93 60-140 <br /> - i <br /> Ir�i I, <br /> 1V <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,results are reported on a wet weight basis. <br /> This analytical report must be reproduced.in its entirety. <br /> Page 18 of 19 <br />