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Sequoia 885 Jarvis Dr <br /> `1 Morgan Hill,CA 95037 <br /> rw - (408)776-9600 <br /> Analytic-- FAX(408)782-6308 <br /> www.senuoialabs.con <br /> Stratus Environmental Inc. Project: ARCO#5469,Stockton,CA MMB0444 <br /> 3330 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 03/14/03 16:22 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC APD <br /> Analyte Result Limit Units Level Restdt %REC Limits RPD Limit Notes <br /> Batch 3B27002-EPA 5035 <br /> Laboratory Control Sample D_up(3B27002-_BSD1) _ Prepared&Analyzed:02/26103__-__ <br /> Methyl tent-butyl ether 10.2 0.50 ug/I 10.0 102 63-137 0.976 13 <br /> Benzene 10.3 0.50 10.0 103 78-124 1.96 12 <br /> Toluene 9.62 0.50 10.0 96.2 78-129 6.33 10 <br /> Surrogate:1,2-Dichloraerhane-d4 5.48 5.00 110 78-129 <br /> Matrix Spike(3B27002-MSI) Source:MMB0444-05 Prepared&Analyzed:02/26/03 <br /> Methyl tert-butyl ether 671 50 ug/I 904 15 72.6 0-200 <br /> Benzene 461 50 544 ND 84.7 78-124 <br /> Toluene 2680 50 3280 7.0 81.5 78-129 <br /> Gasoline Range Organics(C6-C10) 39700 5000 44000 ND 90,2 70-113 <br /> Surrogate: 1.2-Dichloroethane-d4 4.68 5.00 93.6 78-129 <br /> Matrix Spike Dup(3B27002-MSDI) Source:MMB0444-05 Prepared&Analyzed:02/26103_ <br /> Methyl tert-butyl ether 839 50 u9/1 904 15 91.2 0-200 22.3 200 <br /> Benzene 501 50 544 ND 92.1 78-124 8.32 12 <br /> Toluene 2760 50 3280 7.0 83.9 78-129 2.94 10 <br /> Gasoline Range Organics(C6-C10) 39400 5000 44000 ND 89,5 70-113 0.759 9 <br /> Surrogate:1,2-Dichloroethane-d4 3.13 5.00 62.6 78-129 S-LIM <br /> I <br /> Batch 3B27007-EPA 5035 <br /> Blank(3B27007-BLKI) Prepared&Analyzed:02/27/03 <br /> Ethanol ND 40 -ug/l ------ <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> Di-isopropyl ether ND 0.50 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Cert-Amyl methyl ether ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 <br /> 1,2-Dibromoethane(EDB) ND 0,50 " <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. Unless otherwise stated,results are reported on a wee weight <br /> basis. This analytical report must be reproduced in its entirety. <br /> 20 of 28 <br />