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Sequoia 819 Striker Ave Ste 8 <br /> Sacramenloly CA 95834 <br /> Analtical (916)9219600 <br /> J FAX(9t6)9210E00 <br /> WWW sequotalabs cam <br /> ' Geological Technics Inc <br /> Project Cardoza 5312195 <br /> 1101 7th Street Pr4lect Number 662 2 Reported <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 12/24/03 17 08 <br /> GasoIlne\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 Lands RPD Limn Notes <br /> ' Batch 3120283-EPA 5030B (P/T] <br /> Matrix Spike Dup(3120283-MSDI) Source 5312215-07 Prepared&Analyzed 12/19/03 <br /> ' Methyl tert butyl ether 00524 00050 mg/kg 00500 ND 105 60-140 10 25 <br /> Benzene 00554 00050 00500 ND H] 60-140 0 25 <br /> Toluene 00496 00050 00500 ND 99 60-140 4 25 <br /> Surrogate I 2-DCA-d4 00530 00.500 106 60-140 <br /> ' Surrogate Toluene-ds 00471 00500 94 60-140 <br /> Surrogate 4-BFB 00522 00500 104 60 140 <br /> ' Sequoia Analytical-Sacramento 77te results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are repot ted on a wet weight basis <br /> This analytical repot t must be reproduced in its entirety <br /> Page 30 of 31 <br />