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Sequoia 885Jarvis 507 <br /> ''"'►-;�'i Morgan Hill CA 950337 <br /> (408)776 9600 <br /> Analytical FAX(408)782-6308 <br /> www sequoialabs com <br /> URS Corporation[ArcoI Project ARCO#2186,Stockton,CA M010313 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G013ZM-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 09/28/05 10 46 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Soutce %REC RPD <br /> Analyte Result Limit Umts Level Result %REC Limits RPD Limit /Votes <br /> Batch 5120037-EPA 5030B PIT/EPA 8260B <br /> Blank(5120037-BLK1) Prepared&Analyzed 09/20/05 <br /> cert-Amyl methyl ether ND 050 ugtl <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <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 ten-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 /> asolme Range Organics(C4-C12) ND 50 <br /> Surrogate 12-Dichloroethane-d4 210 250 84 60-735 <br /> Blank(5120037-BLK2) Prepared 09/20/05 Analyzed 09/21/05 <br /> tert-Amyl methyl ether ND 0 50 ug/I <br /> Benzene ND 050 " <br /> tent Butyl alcohol ND 20 " <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 cert-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 Range Organics(C4-C12) ND 50 " <br /> Surrogate 12-Dichloroethone-d4 212 250 85 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 9 of 12 <br />