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819 Sinker Ave Ste 8 <br /> Sequoia Sacmnienw CA 92199600 <br /> Analytical FAX(916)921-0100 <br /> WWW segMalabs eom <br /> ' Geological Technics,Inc Project-Cardoza 5410678 <br /> 1101 7th Street PmjectNumber 662.2 Reported <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 1111 1/04 18 10 <br /> GasolineWEXIOxygenates by EPA method 8260B -Quahty Control <br /> ' Sequoia Analytical-Sacramento <br /> Reporhng Spike Source °/*REC RPD <br /> Analyte Result Lama Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4110123-EPA 5030B /T /EPA 8260B <br /> Matrix Spike(4110123-MS2) Source S410678-01 Prepared 11/09/04 Analyzed,11/10/04 <br /> Methyl tert-butyl ether 00410 00050 UTAS 00200 ND 205 60-140 QM01 <br /> Benzene 00232 00050 00200 ND 116 60-140 <br /> Toluene 00272 00050 00200 ND 136 60-140 <br /> Surrogate 1,2-,DCA-d4 000769 00100 77 60-140 <br /> Surrogate Toluene-d8 00102 00100 102 60-140 <br /> Surrogate 4-.BFB 000954 00100 95 60-140 <br /> Matnx Spike Dup(4120123-MSD2) Source 5410678-01 Prepared. 11/09/04 Analyzed 11/10/04 <br /> Methyl tert-butyl ether 00431 00050 mg/kg 00200 ND 216 60440 5 25 QM01 <br /> Benzene 00246 00050 00200 ND 123 60-140 6 25 <br /> Toluene 00283 00050 00200 ND 142 60-140 4 25 QM01 <br /> Surrogate 12-DCA-d4 000774 00100 77 60-140 <br /> lwurrogafe Toluene-d8 000960 00100 96 60-140 <br /> urrogate 4-BFB 000988 00100 99 60-140 <br /> 1 <br /> 1 <br /> 1 <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 10 of 12 <br />