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Sequoia 1455 McDowell taluma,C h Ste D <br /> 4954 <br /> a— ) <br /> ] Petaluma,CA 94954 <br /> Analytical (707)792-1865 <br /> FAX(707)792-0342 <br /> www.sequoialabs.com <br /> 1 <br /> URS Corp-Sacramento Prcject:Arco Site 548,Stockton,�CA P412404 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number:G09JZ-0037 ' Reported: <br /> ? Sacramento CA,95833 Project Manager:Vemon P.Elarth 01/11/05 10:28 <br /> d <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Petalu3ma <br /> Reporting jl <br /> Analyte Result Limit Units Dilution i1'Batch Prepared Analyzed Method Note <br /> i <br /> Folley(P412404-01)Water Sampled:12/22/04 06:55 Received: 12/22/04 13:15 <br /> Tert-amyl methyl ether ND 1.0 ugll l 5010022 01/04/05 01/04/05 EPA 8260B <br /> If Benzene ND 0.50 <br /> Tert-butyl alcohol ND 20 „ <br /> { Di-isopropyl ether ND 1.0 <br /> 1,2-Dichloroethane ND 0.50 <br /> Ethanol CVD 100 " <br /> , <br /> Ethylbenzene ND 0.50 <br /> Ethyl tert-butyl ether ND 1.0 <br /> Methyl tert-butyl ether ND 0.50 <br /> Toluene ND 0.50 <br /> Xylenes(total) _ ND 0.50 <br /> - 1 <br /> Surrogate:Dibromofluoromethane 94% 84-122 " <br /> Surrogate: 1,2-Dichloroethane-d4 91 % 74-135 <br /> Surrogate:Toluene-d8 102% 84-119 <br /> Surrogate:4-&romofluorobenzene 103% 86-119 " <br /> i <br /> i <br /> s <br /> r <br /> 1 , <br /> i <br /> Ik <br /> f <br /> 1 <br /> Sequoia Analytical-Petaluma 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 /> 4 <br /> h , <br /> Page 4 of 8 <br />