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Dnve <br /> Z— (409) <br /> 885larvasSeqUOla Margen Hill CA 9503750377 776 00 <br /> Analytical FAX(409) 08 <br /> www sequoiacalabiabs 633com <br /> Secor-Rancho Cordova(ARCO) Project ARCO 44932,Stockton,CA MO10547 <br /> 3017 Kilgore Rd Suite 100 Project Number GOC SD-0001 Reported <br /> Rancho Cordova CA,95670 Project Manager Clinton Harms 10/20/05 12 56 <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 Limas RPD Limit Notes <br /> Batch 5J15005- EPA 5030B PIT/EPA 8260B <br /> Blank(5J15005-BLKI) Prepared&Analyzed 10/15/05 <br /> cert-Amyl methyl ether ND 050 ug/l <br /> i <br /> Benzene ND 050 " <br /> ten-Butyl alcohol ND 50 <br /> Di isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> 1 2 Dichloroethane ND 050 <br /> Ethanol ND 100 " <br /> Ethyl tent-butyl ether ND 050 <br /> Ethylbenzene ND 050 <br /> Methyl ten-butyl ether ND 050 " <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 <br /> Gasoline Range Organics(C4-C 12) ND 50 <br /> Surrogate 12-Dichloroethane-l4 2 14 250 86 60-135 <br /> Blank(5J15005-BLK2) Prepared&Analyzed 10/15/05 <br /> tert-Amyl methyl ether ND 050 ug/l <br /> Benzene ND 050 " <br /> ten-Butyl alcohol ND 50 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> 1,2-Dichlo•oethane ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl tort-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Rtmge Organics(C4-C12) ND 50 " <br /> Surrogate 12-Dichloroethane-d4 230 250 91 60-135 <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 on a wet weight basis <br /> . This analytical report must be reproduced in its entirety <br /> Page 15 of 24 <br />