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Dnvc <br /> �w�'_ 8 11 JarCA <br /> vis 5037 <br /> ' <br /> Sequoia Morgan(408)776 9604 <br /> � Analytical FAX(408)7926308 <br /> www sequoialabs com <br /> i <br /> Secor-Rancho Cordova(ARCO) Project ARCO#2133,Rancho Cordova,CA MN10853 <br /> 3017 Kilgore Rd Suite 100 Project Number Arco#2133,Racho Cordova CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 10/06/04 15 53 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result lamlt Units Level Result %REC i.Aralts RPD Limit Notes <br /> Batch 4JO4002-EPA 5030B PIT <br /> Matrix Spike Dap(4J04002-MSD2) Source MNI0711-02 Prepared 10/04/04 Analyzed 10/05/04 <br /> Benzene 1270 25 ugq 320 980 91 69-124 08 20 <br /> Ethylbenzene 1390 25 376 980 109 84-132 4 20 <br /> Methyl tent-butyl ether 861 25 496 390 95 63-137 08 20 <br /> Toluene 1580 25 1600 22 97 78-129 _3 20 <br /> Xylenes(total) 2900 25 1830 940 107 83-137 4 20 <br /> Gasoline Range Orgamcs(C4-C12) —37000--2500 22000-15000-100— 70-124 3 20 <br /> Surrogate 1,2-Drchloroethane d4 4 79 5 00 96 78-129 <br /> Batch 4JO5002-EPA 5030B PIT <br /> Blank(4J05002-BLK1) Prepared&Analyzed 10/05/04 <br /> tert Amyl methyl ether ND 0 50 ug/l <br /> Benzene ND 0 50 <br /> Cert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 0 50 " <br /> 12-Dibromoethane(EDB) ND 0 50 " <br /> 1,2-Drchloroethane ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Gasoline Range Organics(C4-C 12) ND 50 " <br /> Surrogate 12-Dichloroethane-d4 495 5 00 99 78-129 <br /> Laboratory Control Sample(4J05002-BS1) Prepared&Analyzed 10/05/04 <br /> tert-Amyl methyl ether 101 0 50 ugA 10 0 101 82-140 <br /> Benzene 10 6 050 100 106 69-124 <br /> tert-Butyl alcohol 498 20 Soo 100 56-131 <br /> Di-isopropyl ether 105 050 100 105 76-130 <br /> 1,2-Dibromoethane(EAB) 103 050 100 103 77-132 <br /> 1,2-Dichloroethane 11 0 050 100 110 77-136 <br /> Ethanol 197 too 200 98 31-143 <br /> Ethyl tert-butyl ether 102 0 50 100 102 81-121 <br /> Ethylbcnzene 101 050 100 101 84-132 <br /> Methyl tert-butyl ether 103 0 50 100 103 63-137 <br /> Sequoia Analytical-Morgan Hill The results to this report apply to the samples analyzed in 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 12 of 15 <br />