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8 t 9 Striker Ave Ste 8 <br /> eSequoia Sacramento 1CA 95634 <br /> _�/�Mii� "",111�A' 8916 921 9600 <br /> ' -0 100 <br /> Analytical www <br /> (916)92 <br /> scorn <br /> www sequotalabs cam <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 /> Gas oline\BTEXIOxygenates by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %RBC Limits RPD Limit Notes <br /> ' Batch 3120283-EPA 5030B 1P/T] <br /> Laboratory Control Sample(3120283-BS1) Prepared&Analyzed 12/19/03 <br /> Methyl tert-butyl ether 00441 00050 mg/kg 00500 88 60 140 <br /> ' Benzene 00508 00050 00500 102 70 130 <br /> Toluene 00464 00050 00500 93 70-130 <br /> Surrogate 12 DCA-d4 00546 00500 109 60-140 <br /> ' Surrogate Toluene d8 00469 II 00500 94 60 140 <br /> Surrogate 4-BFB 00503 00500 101 60-140 <br /> Laboratory Control Sample(3120283-BS2) Prepared&Analyzed 12/19/03 <br /> ' Methyl tert-butyl ether 00491 00050 mg/kg 00496 99 60 140 <br /> Benzene 00312 00050 00320 97 70 130 <br /> Toluene 0 155 00050 0 148 105 70-130 <br /> Gasoline Range Organics 1 78 10 220 81 70 130 <br /> MSurrogate 12 DCA-d4 00625 00500 125 60 140 <br /> Surrogate Toluene d8 00465 00500 93 60 140 <br /> Suri ogaie 4-BFB 00496 00500 99 60-140 <br /> ' Laboratory Contra]Sample(3120283-BS4) Prepared&Analyzed 12/22/03 <br /> Methyl tert butyl ether 00522 00050 mg/kg 00496 105 60-140 <br /> Benzene 00275 00050 00320 86 70-130 <br /> ' Toluene 0 167 00050 0 148 113 70 130 <br /> Gasoline Range Organics l 94 10 220 88 70 130 <br /> Sun ogate 12-DCA-d4 00,596 00500 119 60-140 <br /> Surrogate Toluene d8 00516 00500 103 60-140 <br /> ' <br /> Su <br /> rogate 4-BFB 00508 00500 102 60-140 <br /> Matrix Spike(3120283-MSI) Source 5312215-07 Prepared&Analyzed 12/19/03 <br /> Methyl ter(-butyl ether 00579 00050 mg/kg 00500 ND 116 60 140 <br /> ' Benzene 00554 00050 " 00500 ND 111 60 140 <br /> Toluene 00476 00050 00500 ND 95 60-140 <br /> Surrogate 12-DCA-d4 00559 00500 112 60-140 <br /> Surrogate Toluene-d8 00477 00500 95 60-140 <br /> Surrogate 4 BFB 00525 00500 105 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 slated results are reported on a wet weight basis <br /> This analytical report nnrst be reproduced in its entu ety <br /> Page 29 of 31 <br /> 1 <br />