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Sequoia Bl95tn16)92190 <br /> Sacramento,CA ker Ave95834 <br /> (916)921-9600 <br /> Analytical www <br /> (916)921-0100 <br /> FAX Segt,nialaba com <br /> ' Project Cardoza 5412155 <br /> Geological Technics,Inclnc J <br /> 1101 7th Street Protect Number 662 2 Reported <br /> Modesto CA,95354 Prolett Manager Joseph Angulo 12/21/04 12 02 <br /> Gasoline\BTEXIOxygenates by EPA]method 8260B-Quality Control <br /> ' Sequoia Analytical-Sacramento <br /> Rcporttng Spice Source %REC RPI) <br /> Analyte Result Lttmt Units Level Result %REC Lkn its RPD Lunn Notes <br /> ' Batch 4120235-EPA 5030B PIT /EPA 8260B <br /> Laboratory Control Sample(4120235-BS1) Prepared 12/17/04 Analyzed 12/18/04 <br /> Methyl tert-butyl ether 174 050 ugA 200 87 60-140 <br /> ' Benzene 183 050 200 92 70-130 <br /> Toluene 212 050 200 106 70-130 <br /> Surrogate 12-DCA-d4 925 100 92 60-140 <br /> ' Surrogate Toluene-d8 114 n 100 114 60-140 <br /> Surrogate 4-BFB 104 100 104 60-140 <br /> Laboratory Control Sample(4120235-BS2) Prepared&Analyzed 12/19/04 <br /> Methyl tort-butyl ether 191 050 ug/l 200 96 60-140 <br /> Benzene 17 0 050 200 85 70-130 <br /> Toluene 198 050 20 0 99 70-130 <br /> Wurragate 12-DCA-d4 106 100 106 60-140 <br /> urrogate Toluene-d8 961 100 96 60-140 <br /> Surrogate 4-BFB 986 100 99 60440 <br /> Laboratory Control Sample(4120235-BS3) Prepared 12/17/04 Analyzed 12/18/04 <br /> ' Methyl tent-butyl ether 42 1 050 ug/l 432 97 60-140 <br /> Benzene 267 050 268 100 70-130 <br /> Toluene 182 0 so 152 120 70-130 <br /> Gasoline Range Organics(C4-C12) 1920 50 2200 87 70 130 <br /> Surrogate 12-DCA-d4 9 71 100 97 60-140 <br /> Surrogate Toluene-d8 103 100 103 60-140 <br /> ' Surrogate 4-BFB 109 100 109 60-140 <br /> Laboratory Control Sample Dup(4120235-BSD3) Prepared&Analyzed 12/19/04 <br /> Methyl tert-butyl ether 380 050 ug/l 432 88 60-140 10 25 <br /> Benzene 280 050 268 104 70-130 5 25 <br /> ' Toluene 180 050 " 152 118 70-130 1 25 <br /> Gasoline Range Organics(C4-C12) 2120 50 2200 96 70-130 10 25 <br /> Surrogate 12-DCA-d4 108 100 108 60-140 <br /> ' Surrogate Toluene-d8 101 100 101 60-140 <br /> Surrogate 4-BFB I1 0 100 110 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight oasts <br /> This analytical report must be reproduced in its entirety <br /> Page 10 of 12 <br />