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Sequoia aaJarvis 037 <br /> Morgan Hill,CA 95037 <br /> 4D <br /> qW Analytical (40s)70 <br /> FAX(408)7816308 <br /> www sequotalabs,aoabs,cofi <br /> i <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932, Stockton,CA MMJ0401 <br /> 3017 Kilgore Rd Suite 100 Prolcet Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 11/06/03 08 05 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC APD <br /> Analyte Result Lunn Units Level Result %REC Limits RPD Limit Nates <br /> Batch 3J22020-EPA 5030B ModlBed <br /> Blank(3J22020-BLKI) Prepared&Analyzed 10/22/03 <br /> Ethanol ND 100 ug/l <br /> tcrt-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether ND 050 " <br /> Dl-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> tent-Amyl methyl ether ND 050 " <br /> 1,2-Dtchloroethane ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics ND 50 <br /> Surrogate 1 2-Dichloroethane-d4 484 .500 96 8 78-129 <br /> Laboratory Control Sample(3J22020-BSI) Prepared 10/22/03 Analyzed 10/23/03 <br /> Ethanol 172 100 ugll 200 860 31-186 <br /> tent-Butyl alcohol 508 20 500 102 0-206 <br /> Methyl tert-butyl ether 957 050 too 95 7 63-137 <br /> Di-isopropyl ether 9 60 050 too 96 0 76-130 <br /> Ethyl tert-butyl ether 9 92 050 too 99 2 61-141 <br /> tent-Amyl methyl ether 102 050 100 102 56-140 <br /> 1,2-Dtchloroethane 113 050 100 113 77-136 <br /> 1,2-Dibromoethane(EDB) 10 1 050 too 101 77-132 <br /> Benzene 966 050 100 96 6 78 124 <br /> Toluene 967 050 100 967 78-129 <br /> Ethylbenzene 997 050 100 99 7 84-117 <br /> Xylenes(total) 304 050 300 101 83-125 <br /> Surrogate 11-Dtchloroethane d4 5 96 500 119 78-129 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated,results are reported an a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> 16 of 21 <br />