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Sequoia 885 Jarvis Dr <br /> i�DMorgan Hill,CA 95037 <br /> iWp Analytical (408)7769600 <br /> • FAX(408)782.6308 <br /> www.sequoialabs.con <br /> Stratus Environmental Inc. Project: ARCO#5469,Stockton,CA MMC0044 <br /> 3330 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager. ,lay Johnson 03/20/03 11:19 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3C10040-EPA 5035 <br /> Laboratorx Control Sample Dup 3C10040-BSD1 Prepared&Analyzed:03/10/03 <br /> Methyl tert-butyl ether 10.4 0.50 up/l 10.0 104 63.137 0.00 13 <br /> Benzene 10.1 0.50 10.0 101 78-124 2.93 12 <br /> Toluene 9.58 0.50 10.0 95.8 78-129 4.92 10 <br /> Surrogate: 1,2-Dichloroethane-d4 5.49 5.00 110 78-129 <br /> Matrix Spike 3C10040-MS1Source:MMC0044-01 Prepared&Analyzed:03/10/03 <br /> Methyl cert-butyl ether 15.1 0.50 ug/1 9.04 6.7 92.9 0-200 <br /> Benzene 5.31 0.50 5.44 0.070 <br /> 96.3 78-124 <br /> Toluene 27.1 0.50 32.8 0.080 82.4 78-129 <br /> Gasoline Range Organics(C6-C 10) 427 50 440 15 93.6 70-113 <br /> Wrrogate: 1,2-Dichlaroelhane-d4 5.92 5.00 118 78-129 <br /> Matrix Spike Du 3010040-MSDI) Source:MMC0044-01 Prepared:03/10/03 Analyzed:03/11/03 <br /> Methyl tert-butyl ether 16.2 0.50 ug/l 9.04 6.7 105 0-200 7.03 200 <br /> Benzene 5.35 0.50 5.44 0.070 97.1 78-124 0.750 12 <br /> Toluene 27.9 0,50 32.8 0.080 84.8 78-129 2.91 10 <br /> Gasoline Range Organics(C6-C10) 419 50 440 15 91.8 70-113 1.89 9 <br /> Surrogate: 1,2-Dichloroethane-d4 5.74 5.00 115 78-129 <br /> Batch 3010043-EPA 5035 <br /> Blank 3C_1.0043-BLKI) _ _ _ Prepared&Analyzed:03/11/03 w <br /> Ethanol ND 40 u9il <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 /> tert-Amyl methyl ether ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> 1,2-Dibromoethane(EDS) 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 wet weight <br /> basis. This analytical report must be reproduced in its entirety. <br /> Page 9 of 13 <br />