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Drive <br /> 885 <br /> Sequoia Morgan Hill <br /> CA CA 950375037 <br /> (408)776-9600 <br /> � wwwwwsegAnalytical 8)7826308 <br /> uotalabs corn <br /> 0 <br /> URS Corporation[Arco 1 I Project ARCO#5469, Stockton,CA M000479 <br /> 2870 Gateway Oaks Dr, Ste 300 Project Number G09JZ-0290 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 04/07/05 12 53 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Morgan Hill <br /> Reporting <br /> Analyte Result Linut Units Dilution Batch Prepared Analyzed Method Note <br /> MW-8(M000479-08RE1)Water Sampled 03/16/05 05 16 Received 03/17/05 11 09 <br /> Methyl tert-butyl ether 23000 250 ug/I 500 5C30005 03/30/05 03/30/05 EPA 8260B <br /> Surrogate 12-Dichloroethane-d4 96% 60-135 " <br /> MW-9(M000479-09)Water Sampled 03/16/05 04 16 Received 03/17/05 11 09 <br /> tert-Amyl methyl ether ND 050 ug/l 1 500005 03/30/05 03/30/05 EPA 8260E <br /> Benzene ND 0 50 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane 2 6 0 50 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> #thyl tert-butyl ether 0 54 050 " <br /> ne ND 050 <br /> " <br /> es(total) ND 050 " <br /> Gasoline Range Organics(C4-C 12) ND 50 " <br /> Surrogate 1,2-Dichloroethane-d4 111 % 60-135 " <br /> MW-10(M000479-10)Water Sampled 03/16/05 05 26 Recei-,ed 03/17/05 11 09 <br /> tert-Amyl methyl ether ND 050 ug/l. I 5C25006 03/25/05 03/26/05 EPA 8260B <br /> Benzene 1 1 0 50 1. <br /> " " " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether 069 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> 1,2-Dichloroethane 22 050 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether 64 0 50 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Gasoline Range Organics(C4-C12) 90 50 " <br /> Surrogate 12-Dichloroethane-d4 103 % 60-135 <br /> uola Analytical-Morgan Hill 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 9 of 30 <br />