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1885 Jams Drive <br /> ■ Sequoia Morgan Hill C95037 <br /> (408)7776 9600 <br /> Analytical wFAXww sequouiquotaab5308 <br /> labs com <br /> Project MOH 1005 <br /> URS Corporation[Arco 1] ] ARCO#6020,Manteca CA <br /> 2$70 Gateway Oaks ilr,Ste 300 Project Number GOC1 V-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 09/01/05 17 52 <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 Limits RPD Limit Notes <br /> Batch 5H26005-EPA 5030B PIT 1 EPA 8260B <br /> Blank(5H26005-BLK1) Prepared&Analyzed 08/26/05 <br /> tent-Amyl methyl ether NO 050 ugA <br /> Benzene NO 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether NO 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 <br /> yle I s(total) ND 0 50 ' <br /> aso in Range Organics(C4 C12) ND 50 <br /> Surrogate 11 Dichloroethane-d4 1 99 1 SO 80 60 135 <br /> Blank(5H26005-BLK2) Prepared&Analyzed 08/26/05 <br /> tert-Amyl methyl ether ND 050 ug/l <br /> Benzene ND 0 50 " <br /> tert-Butyl alcohol ND 20 <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) NO 050 <br /> 12-Dichloroethane ND 050 " <br /> Ethanol NO 100 <br /> Ethyl tert-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) NO 50 <br /> Surrogate 11-Drchloroethane-d4 196 150 78 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 enirrety <br /> Page 8 of 11 <br />