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Jarvi <br /> Drive <br /> Sequoia Morgan$85Hill,l,CA 95037 5037 <br /> ��• Analytical <br /> (408)FAX(408)slabs c 08 <br /> www sequoialabs om <br /> Secor-Rancho Cordova(ARCO) Project ARCO#0595,Stockton,CA MND0067 <br /> 3017 Kilgore Rd Suite 100 Project Number 38983 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Berikosky 04/19/04 17 33 <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 lamas RPD 1tm11 Notes <br /> Batch 4DO8024-EPA 50308 Modified <br /> Blank(4D08024-BLK1) Prepared&Analyzed 04/08/04 <br /> Ethanol ND 100 ug/I <br /> tent Butyl alcohol ND 50 " <br /> Methyl tent-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dtbromoethane(EDB) ND 050 " <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 050 " <br /> . Xylenes(total) ND 050 <br /> Gasolene Range Organics(C4-C12) ND 50 " <br /> Surrogate 1 2-Dichloroethane-d4 528 500 106 78-119 <br /> Laboratory Control Sample(4D08024-BSI) Prepared&Analyzed 04/08/04 <br /> Ethanol 165 100 ug/1 200 825 31-143 <br /> tert-Butyl alcohol 43 3 5 0 500 86 6 56 131 <br /> Methyl tert-butyl ether 11 2 0 50 10 0 112 63 137 <br /> Di-tsopropyl ether 11 1 050 too 111 76-130 <br /> Ethyl tent-butyl ether l 1 5 050 100 115 81-121 <br /> tert-Amyl methyl ether 110 050 100 110 82-140 <br /> 1,2-Dichloroethane 104 050 10 0 104 77-136 <br /> 1,2-Dibromoethane(EDB) 10 9 050 10 0 109 77-132 <br /> Benzene 101 050 100 101 69-124 <br /> Toluene 102 050 100 102 78-129 <br /> Ethylbenzene 104 050 too 104 84-132 <br /> Xylenes(total) 348 050 300 116 83 137 <br /> Surrogate 1 1-Dichloroethane-d4 523 500 105 78-129 <br /> Sequoia Analytical-Morgan Hill The results to this report apply to the samples analyzed to accordance with the chain of <br /> • custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 13 of 22 <br />