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Iw <br /> 1455 McDowell Blvd,North Ste D <br /> (D Sequoia Petaluma CA 94954 <br /> (707)792-1865 <br /> Analytical FAX(707)M-0342 <br /> . www sequoialabs corn <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 /> Anatyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> W-1A(P306214-01)Water Sampled 06/11/03 09 40 Received 06/12/03 11 30 <br /> Tert-amyl methyl ether ND 10 ug/l 1 3060345 06/14/03 06/14/03 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 tert-butyl ether ND 10 ^ » <br /> Methyl tert-butyl ether ND 050 ^ <br /> Surrogate Dibromofluoromethane 93% 84-122 " <br /> Surrogate I 1-Drchloroethane-d4 86% 74-135 " <br /> Surrogate Toluene-d8 89% 84-119 " <br /> W-2(P306214-02)Water Sampled 06/11/03 10 50 Received 06/12/0311 30 R-04 <br /> Tert-amyl methyl ether ND 5 0 ug/l 5 3060345 06/14/03 06/14/03 EPA 8260B <br /> 71Tert-butyl alcohol ND too <br /> -isopropyl ether ND 5 0 <br /> 1,2-Dichloroethane ND 2 5 <br /> Ethanol ND 500 " <br /> Ethyl tert-butyl ether ND 5 0 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate Dibromofluoromethane 97% 84-122 <br /> Surrogate 1,2-Drchloroethane-d4 91 % 74-135 " <br /> Surrogate Toluene-d8 91 % 84-119 " <br /> W-2A(P306214-03)Water Sampled 06/71/03 10 30 Received 06/12/13 11 30 <br /> Tert-amyl methyl ether ND 10 ug/I 1 3060345 06/14/03 06/14/03 EPA 8260B <br /> Tert-butyl alcohol 24 20 " <br /> Dt-isopropyl ether ND 1 0 " » <br /> 1,2-Dichloroethane ND 0 50 <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 1 0 ^ <br /> Methyl tert-butyl ether 11 050 " <br /> Surrogate Dibromofluoromethane 94% 84-122 " <br /> Surrogate 1 2-Drchloroethane-d4 85% 74-135 " <br /> Surrogate Toluene-d8 90% 84-119 " <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 /> Page 5 of 10 <br />