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n0 <br /> w <br /> • 54 <br /> ( - Sequoia 1455 McDowell umaOrth 49 <br /> 4D (707)792-1865 <br /> Analytical FAX(707)792-0342 <br /> . www sequoialabs coin <br /> URS Corp-Sacramento Project Arco Site 434,Lodi,CA P306214 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim 50433 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 06/16/03 16 01 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Lima Units Dilution Batch Prepared Analyzed Method Note <br /> W-2B(P306214-04)Water Sampled 06/11/03 10 20 Received 06/12/03 11 30 <br /> Tert-amyl methyl ether ND 10 ugll 1 3060345 06/14/03 06/15/03 EPA 8260B <br /> Tert-butyl alcohol ND 20 " ^ <br /> Di-isopropyl ether ND 10 " <br /> 1,2-Dichloroethane ND 050 <br /> Ethanol ND 100 <br /> Ethyl tent-butyl ether ND 1 0 " <br /> Methyl tent-butyl ether ND 050 " <br /> Surrogate Dibromofluoromethane 93% 84-122 " <br /> Surrogate 1 2-Dichloroethane-d4 82% 74-13-5 " ^ <br /> Surrogate Toluene-d8 88% 84-119 ^ <br /> W-3(P306214-05)Water Sampled 06/11/030850 Received 06/12/03 11 30 <br /> Tert-amyl methyl ether ND 10 ug/l 1 3060345 06/14/03 06/15/03 EPA 8260B <br /> Tert-butyl alcohol ND 20 <br /> _ <br /> isopropyl ether ND 1 0 ^ <br /> 1,2-Dichloroethane ND 050 <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 1 0 <br /> Methyl tert-butyl ether ND 050 ^ " <br /> Surrogate Dibromofluoromethane 95% 84-122 " <br /> Surrogate 1,2-Dichloroethane-d4 83% 74-135 " <br /> Surrogate Toluene-d8 90% 84-119 " <br /> W-9(P306214-06)Water Sampled 06/11/03 09 15 Received 06/12/03 11 30 <br /> Tert-amyl methyl ether ND 1 0 ug/1 1 3060345 06/14/03 06/15/03 EPA 8260E <br /> Tert-butyl alcohol ND 20 <br /> Di-isopropyl ether ND 10 ^ <br /> 1,2-Dichloroethane ND 050 ^ <br /> Ethanol ND 100 " ^ <br /> Ethyl cert-butyl ether ND 1 0 <br /> Methyl tert-butyl ether ND 050 <br /> Surrogate Dibromofluorornethane 93% 84-122 ^ " <br /> Surrogate 1,2-Dichloroethane-d4 84% 74-135 " <br /> Surrogate Toluene-d8 88% 84-119 " <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed to 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 6 of 10 <br />