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Sequoia 885 Jarvis Dr <br /> Morgan Hill,CA 95037 <br /> a- ) <br /> , Analytical (408)776-9500 <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: Jay 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 RFD <br /> [Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3C10043-EPA 5035 <br /> Matrix Spike 300043-MSI Source:MMC0054-04 Prepared&Analyzed:03/11/03 <br /> Surrogate: 1,2-Dichloroethane-4`4 4.68 ug/l 5.00 93.6 78-129 <br /> Matrix Spike Du 3CI0043-MSD1 Source:MMC0054-04 Prepared&Analyzed:03/11/03 <br /> Methyl tert-butyl ether ND 0.50 ug/l 9.04 ND 0-200 200 <br /> Benzene 5.25 0.50 5.44 ND 96.5 78-124 2.07 12 <br /> Toluene 24.2 0.50 32.8 ND 73.8 78-129 6.01 10 QM-07 <br /> Gasoline Range Organics(C6-C10) 349 50 440 15 75.9 70-113 12.1 9 QR-02 <br /> Surrogate: 1,2-Dichloroethane-d4 4.85 5.00 97.0 78-129 <br /> Batch 3C11031 -EPA 5035 <br /> Alft8lank 3C11031-BLK1 Prepared&Analyzed:03/11/03 <br /> Ethanol ND 40 ug/I <br /> tert-Butyl alcohol ND 20 0-12a <br /> Methyl tert-butyl ether ND 0.50 0-12 <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(EDB) ND 0.50 " <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Gasoline Range Organics(C6-C 10) ND 50 <br /> Surrogate: 1,2-Dichloroethane-d4 5.74 5.00 115 78-129 <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 l 1 of 13 <br />