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Sequoia 1455 McDowell A Ste <br /> Petaluma, <br /> CCA 449544 <br /> (707)792-1865 <br /> Analytical FAX(707)792-0342 <br /> . www sequoialabs coin � <br /> URS Corp-Sacramento Project Arco Site 6020,Manteca,CA <br /> P406056 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intnm-50681 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 06/14/04 20 24 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result Lima Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-5(P406056-01)Water Sampled 05!2610412 35 Received 05/28/04 16 05 <br /> Ethanol ND 100 ug/l 1 4FO7003 06/077/04 06/07/04 EPA 8260B <br /> tert-Butyl alcohol ND 20 <br /> Methyl tert-butyl ether ND 050 <br /> Di-isopropyl ether ND 050 <br /> Ethyl tent-butyl ether ND 050 <br /> tert-Amyl methyl ether ND 050 <br /> 1,2-Dichloroethane ND 050 ^ <br /> 1,2-Dibromoethane(EDB) ND 050 " ^ <br /> Surrogate 1,2-Dichloroethane-d4 120% 78-129 <br /> MW-6(P406056-02)Water Sampled 05/26/04 11 35 Received 05/28/04 I6 05 <br /> Ethanol ND 200 ug/l 2 4FO7003 06/07/04 06/07/04 EPA 8260E <br /> tert-Butyl alcohol ND 40 <br /> Methyl Cert-butyl ether 74 10 <br /> "i-isopropyl ether ND 1 0 ^ <br /> thyl tent-butyl ether ND 10 <br /> tert-Amyl methyl ether ND 10 ^ ^ ^ <br /> 1,2-Dichloroethane ND 10 ^ ^ <br /> 1,2-Dibromoethane(EDB) ND 10 <br /> Surrogate 1,2-Dichloroethane-d4 117% 78-129 " <br /> MW-7(P406056-03)Water Sampled 05/26/04 13 40 Received 05/28/04 16 05 <br /> Ethanol ND 100 ug/l 1 4FO7003 06/07/04 06/07/04 EPA 8260B <br /> tert-Butyl alcohol ND 20 ^ ^ ^ " ^ <br /> Methyl tert-butyl ether ND 050 ^ ^ ^ ^ <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 <br /> tert-Amyl methyl ether ND 050 ^ ^ <br /> 1,2-Dichloroethane ND 050 ^ ^ ^ <br /> 1,2-Dibromoethane(EDB) ND 050 ^ ^ ^ <br /> Surrogate 1 2-Dichloroethane-0 114% 78-129 <br /> Sequoia Analytical -Petaluma The results to 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 baits <br /> Thrs analytical report must be reproduced in its entirety <br /> Page 8 of 20 <br />