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' Sequoia Jarvis Dr <br /> Morgan Hill, <br /> CA 45037 <br /> (408)776-9600 <br /> . 'W Analytical FAX(408)782-6308 <br /> www.sequoialabs.corr <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 pounds 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 3CIO040-EPA 5035 <br /> Blank 3C10040-BLKI Prepared&Analyzed:03/10/03 <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 /> 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-C10) ND 50 " <br /> Surrogate: 1,2-Dichloroethane-d4 6.15 5.00 123 78-129 <br /> Laboratory Control Sample 3010040-BS1 Prepared&Analyzed:03/10/03 <br /> Methyl tert-butyl ether 10.4 0.50 ug11 10.0 104 63-137 <br /> Benzene 10.4 0.50 10.0 104 78-124 <br /> Toluene 9.12 0.50 10.0 91,2 78-129 <br /> Surrogate: 1,2-Dichloroethane-d4 6.11 5.00 122 78-129 <br /> Laboratory Control Sample(3C10040-BS2) Prepared&Analyzed:03/10/03 _ <br /> Methyl tert-butyl ether 8.53 0.50 ug/1 9.04 94.4 63-137 <br /> Benzene 5.34 0.50 5.44 98.2 78-124 <br /> Toluene 26.8 0.50 32.8 81,7 78-129 <br /> Gasoline Range Organics(C6-C 10) 387 50 440 88.0 70-113 <br /> Surrogate:1,2-Dichloroethane-d4 4.17 5.00 83.4 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 8 of 13 <br />