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Sequoia 1455 McDowell Blvd,North ISte D <br /> a Petaluma,CA 94954 <br /> .i' .. aNtic .(707)792'1865 <br /> FAX(707)792-0342 <br /> www.sequoialabt.com <br /> ' l <br /> tl <br /> URS Corp Sacramento Project: Arco Site 6100,Tracy,CA P309366 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36619 Reported: ' <br /> t <br /> Sacramento CA,95833 Project Mana en Jay Johnson <br /> � S Y 1010610318:00 , <br /> 1 Volatile Organic Compounds by EPA Method 8260B <br /> + Sequoia Analytical-Petaluma <br /> f � , <br /> Reporting <br /> Analyte' Result i. Limit Units Dilution Batch Prepared Analyzed Method. Nates <br /> p <br /> Domestic Well(P309366-03)Water Sampled:09/19/43 05:14 Received:09/19/03 08:00 <br /> Tert-amyl methyl ether ND t 1.0 ug/l 1 3100069 10/03/03 10/03/03 EFA 8260B <br /> Benzene ND .0.50 <br /> Tert-butyl alcohol ND 20 <br /> Di-isopropyl ether ND 1.0 <br /> 1,2-13ibtomoethanc(EDB) ND -0.50 <br /> 1,2-Dichloroethane ND 1.'0.50 <br /> Ethanol. ND 100 <br /> Eth lbenzene <br /> Y ND 0.50 <br /> Ethyl tert-butyl ether ND 1.0 <br /> f Methyl tet(-butyl ether ND L0.50 <br /> Toluene' ND 0.50 <br /> Xylenes(total) ND 0.50 <br /> r <br /> Surrogate:Dibronrofluoromethane 97% 84-122 j <br /> Surrogate:1,2-Dichlorocthane-d4 76% 74-135 „ 1 <br /> f Surrogate:Toluene-d8 105% 84-119 <br /> Surrogate:4-Bromofluorobenzene 9601, 86-119 <br /> a <br /> f • t <br /> �� Iy <br /> - r -- - i <br /> k <br /> i <br /> h <br /> ;t q <br /> i <br /> Sequoia Analytical-Petaluma 'The results in this report apply to the samples analyzed in accordance with the chain <br /> afcustodv document. Unless otherwise stated,results are raperted on a wet weight i <br /> basis. This analytical report must he reproduced in its entirety. <br /> Page 5 of 9 <br />