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819 Striker Ave Ste 8 <br /> Sequoia Sacramento C 95834 <br /> (916)922 1 9600 <br /> -0100 <br /> Analytical FAXf9uoiala16)92 scum <br /> www scquotalabs coin <br /> ' Geological Technics,Inc Project Cardoza 5312195 <br /> 1101 7th Street Project Number 662 2 Reported <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 12/24/03 17 08 <br /> GasolinelBTEX\Oxygenates by EPA method 8260B - Quality Control <br /> ' Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3120094-EPA 5030B JP/TJ <br /> Laboratory Control Sample(3120094-BSI) Prepared&Analyzed 12/08/03 <br /> Methyl tert-butyl ether 21 4 050 ug/1 248 86 60-140 <br /> ' Benzene 127 050 160 79 70-130 <br /> Toluene 860 050 742 116 70-130 <br /> Gasoline Range Organics 1020 50 1 100 93 70-130 <br /> ' Surrogate Toluene-d8— -_ 261 - _ 250 - - - 104 ---60-140 <br /> Surrogate 4-BFB 252 250 101 60-140 <br /> Surrogate 12-DCA d4 261 25 0 104 60-140 <br /> ' Laboratory Control Sample(3120094-BS2) Prepared&Analyzed 12/05/03 <br /> Methyl tert-butyl ether 282 050 ug/l 250 113 60-140 <br /> Benzene 252 050 250 101 70-130 <br /> Toluene 265 050 250 106 70-130 <br /> MSurrogate Toluene-d8 258 250 103 60-140 <br /> Suri agate 4 BFB 244 250 98 60-140 <br /> Surrogate 12-DCA-d4 269 250 108 60-140 <br /> ' Matrix Spike(3120094-MS1) Source S312120-04 Prepared 12/08/03 Analyzed 12/49/03 <br /> Methyl Cert-butyl ether 258 050 ugA 248 96 65 60-140 <br /> Benzene 129 050 160 ND 80 70-130 <br /> Toluene 863 050 742 ND 116 70-130 <br /> Gasoline Range Organics 925 50 1100 ND 84 60-140 <br /> Surrogate Toluene-d8 260 250 104 60-140 <br /> Suri agate 4-BFB 234 25 0 94 60-140 <br /> ' Surrogate 12 DCA-d4 272 250 109 60-140 <br /> Matrix Spike Dup(3120094-MSD1) Source S312120-04 Prepared 12/08/03 Analyzed 12/09/03 <br /> Methyl tent-butyl ether 285 0 50 ugll 248 9 6 76 60-140 l0 25 <br /> Benzene 12 3 0 50 11 160 ND 77 70-130 4 25 <br /> Toluene 831 050 742 ND 112 70-130 4 25 <br /> Gasoline Range Organics 888 50 1100 ND 81 60-140 4 25 <br /> Surrogate Toluene-d8 263 25 0 105 60-140 <br /> ' Surrogate 4-BF3 242 25 0 97 60-140 <br /> Siniogate 12-DCA-d4 26B 250 107 60-140 <br /> 1 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accoi dance 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 25 of 31 <br />