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1455 McDowell Blvd,North Ste D <br /> a— ) Sequoia Petaluma,CA 94954 <br /> `l (707)792-1865 <br /> Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 760,Lodi,CA P501284 <br /> 2870 Gateway Oaks Drive Suite 300 Protect Number ArR36622 Reported <br /> Sacramento CA,95833 Protect Manager Vernon P Elarth 01/28/05 17 08 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> alyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-1 (P501284-01)Water Sampled 01/12/05 13 10 Received 01/14/05 14 30 <br /> Tert-amyl methyl ether ND 1 0 ugll 1 5010267 01/25/05 01/25/05 EPA 8260E <br /> Benzene ND 0 50 <br /> Tert-butyl alcohol ND 20 <br /> Di-isopropyl ether ND 1 0 <br /> 1,2-Dibromoethane(EDB) ND 0 50 <br /> 1,2-Dichloroethane 1 7 050 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 0 50 " ^ <br /> Xylenes(total) ND 0 50 ^ <br /> Surrogate Dibromo,Jluoromethane 99% 84-122 " <br /> Surrogate 1,2-Drchloroethane-d4 113% 74-135 " <br /> .Surrogate Toluene-d8 98% 84-119 " <br /> Currogate 4-Bromo luorobenzene 98% 86-119 " <br /> W-1 (P501284-01RE1)Water Sampled 01/12/05 13 10 Received 01/14/05 14 30 <br /> Ethanol ND 100 ug/l 1 5010289 01/26/05 01/26/05 EPA 8260E <br /> Surrogate DibromoJluoromethane 108% 84-122 " <br /> Surrogate 1,2-Dichloroethane-d4 109% 74-135 " <br /> Surrogate Toluene-d8 106% 84-119 " <br /> Surrogate 4-Bromo)rluorobenzene 110% 86-119 " <br /> MW-2(P501284-02)Water Sampled 01/12/05 13 00 Received 01/14/05 14 30 <br /> Tert-amyl methyl ether ND I 0 ug/l 1 5010287 01/26/05 01/26/05 EPA 8260E <br /> Benzene 0 71 050 <br /> Tert-butyl alcohol ND 20 <br /> Dr-isopropyl ether ND 1 0 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> 1,2-Dichloroethane 8 2 0 50 " <br /> Ethanol ND 100 " ^ <br /> Ethylbenzene ND 050 <br /> Ethyl tert-butyl ether ND 1 0 <br /> Methyl tent-butyl ether 2 3 050 <br /> Toluene ND 0 50 " <br /> Xylenes(total) 11 050 ^ <br /> Surrogate DibromoJluoromelhane 94% 84-122 " <br /> Surrogate 1,1-Dichloroethane-d4 107% 74-135 " <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 /> • 77rrs analytical report must be reproduced in its entirety <br /> Page 4 of 15 <br />