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' 819 Sinker Ave Ste 9 <br /> Sequoia Sacramento 95834 <br /> (916)92 1-96009600 <br /> 16) <br /> ' Analytical www <br /> sc uotala 0100 <br /> corn www scquoielahs cam <br /> • <br /> ' Geological Technics,Inc Project Cardoza 5312195 <br /> 1101 7th Street Protect Number 662 2 Reported <br /> Modesto CA,95354 Project Manager Joseph Angulo 12/24/03 17 08 <br /> Gasohne\BTEXIOxygenates by EPA method 8260B - Quality Control <br /> ' Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Resun Limit Units Level Result %REC Limits RPD Limit Notes <br /> ' Batch 3120251 -EPA 5030B [P/T) <br /> Laboratory Control Sample(3120251-BS2) Prepared&Analyzed 12/17/03 <br /> Methyl tert butyl ether 00384 00050 mg/kg 00496 77 60-140 <br /> ' Benzene 00272 00050 'I 00320 85 70-130 <br /> Toluene 0 163 00050 0 148 110 70-130 <br /> Gasoline Range Organics 199 1 0 220 90 _ 70-130 __ <br /> Surrogate 12-DCA-d4 00548 00500 110 60-140 <br /> Surrogate Toluene-d8 00502 00500 100 60-140 <br /> Surrogate 4-BFB 00497 00500 99 60-140 <br /> ' Laboratory Control Sample(3120251-BS3) Prepared&Analyzed 12/l 7/03 <br /> Methyl tert-butyl ether 00467 00050 mg/kg 00496 94 60-140 <br /> Benzene 00284 00050 00320 89 70-130 <br /> Toluene 0154 00050 0148 104 70-130 <br /> MGasoline Range Orgamcs l 85 1 0 _' 220 84 70-130 <br /> Surrogate 1 2-DCA-d4 00602 00500 120 60-140 <br /> Surrogate Toluene-d8 00488 00500 98 60-140 <br /> ' Surrogate 4-BFB 00496 00500 99 60-140 <br /> Matrix Spike(3120251-MSI) Source S31219S-10 Prepared 12/17/03 Analyzed 12/18/03 <br /> Methyl tert-butyl ether 00445 00050 mg/kg 00496 ND 90 60-140 <br /> Benzene 00287 00050 00320 ND 90 60-140 <br /> Toluene 0 161 00050 0 148 ND 109 60-140 <br /> Gasoline Range Organics 1 88 10 - _ 220 _ ND_ __ 85 60-140 <br /> Surrogate 12-DCA-d4 00566 00500 113 60-140 <br /> ' Surrogate Toluene-d8 00490 00500 98 60-140 <br /> Surrogate 4-BFB 00499 00500 100 60-140 <br /> Matrix Spike Dup(3120251-MSD1) Source 5312195-10 Prepared 12/17/03 Analyzed 12/18/03 <br /> ' ethyl tert-butyl ether 0 0455 00050 mg/kg 00496 ND 92 60-140 2 25 <br /> M <br /> Benzene 00291 00050 00320 ND 91 60-140 l 25 <br /> Toluene 0165 00050 0148 ND 111 60-140 2 25 <br /> Gasoline Range Organics - 1 94 —1 0 - 220 _ TND 88 60-140 3 25 <br /> Surrogate 12 DCA-d4 00550 00500 116 60-140 <br /> Surrogate Toluene-d8 <br /> 00491 00500 98 60-140 <br /> Surrogate 4-BFB 00497 00500 99 60-140 <br /> 1 <br /> ' Sequoia Analytical - Sacramento The results in this report apply to Bre samples analyzed in accordance with the chain of <br /> custody document Unless othenvrse stated,results at e reported on a wel weight basis <br /> r 77us analytical report must be reproduced in its entirety <br /> Page 27 of 31 <br />