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819 Striker Ave Ste 8 <br /> Sequoia <br /> Sacramento6)92195834 <br /> 9600 <br /> Analytical FAXe-quo tabsc00 <br /> www sequotalabs cnm <br /> ' <br /> Geological Technics,Inc Project Cardoza S412155 <br /> J <br /> 1101 7th Street <br /> Project Number 662 2 Reported <br /> ' <br /> Modesto CA,95354 Project Manager Joseph Angulo 12/21/04 12 02 <br /> GasollnelBTEXIOxygenates by EPA method 8260B- Quality Control <br /> ' Sequoia Analytical- Sacramento <br /> Reporting Spike Source %uREC RPD <br /> Analyte Result Ltmtt Umts Level Result %REC Limits RPD lamtt Notes <br /> ' Batch 4120235-EPA 5030B [P/TI1 EPA 8260B <br /> Matrix Spike(4120235-MSI) Source S412157-01 Prepared 12/17/04 Analyzed 12/18/04 <br /> ' Methyl tent-butyl ether 171 050 ug/l 200 ND 86 60440 <br /> Benzene 189 050 200 050 92 70-130 <br /> Toluene 172 050 200 ND 86 70 130 <br /> Surrogate 12-DCI-d4 958 100 96 60-140 <br /> Surrogate Toluene-d8 956 100 96 60-140 <br /> Surrogate 4-BFB 959 100 96 60-140 <br /> Matnx Spike Dup(4120235-MSDI) Source 5412157.01 Prepared 12/17/04 Analyzed 12/18/04 <br /> ' Methyl tert-butyl ether l6 8 050 ug/l 20 0 ND 84 60-140 2 25 <br /> Benzene 176 050 200 0 50 86 70-I30 7 25 <br /> Toluene 165 0 50 200 ND 82 70 130 4 25 <br /> e 1 2-DCA-d4 995 100 100 60-140 <br /> WU""r'O..9"g."e <br /> Toluene d8 930 100 93 60 140 <br /> Surrogate 4-BFB 102 700 102 60-140 <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 to its entirety <br /> Page 11 of 12 <br /> 1 <br />