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885 Jarvis Dr <br /> Sequoia Mtrgm Hill,CA 95037 <br /> (408)776-9600 <br /> a— ) <br /> Analytical FAX(408)782-6308 <br /> www sequotalabs can <br /> URS Corporation[I] Protect ARCO#6020,Manteca,CA MLL0107 <br /> 2870 Gateway Oaks Dr,Ste 300 Protect Number ARCO#6020,Manteca,CA Reported <br /> Sacramento CA,95833 Protect Manager Vern Elarth 12/31/02 08 34 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Litrot Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-7 LL0107-03 Water Sampled 11/27/02 08 55 Received 12/02/02 16 50 A-01 <br /> tert-Butyl alcohol ND 20 ug/1 I 2L10015 12/10/02 12/11/02 EPA 8260B <br /> Methyl tert-butyl ether 055 050 0-09 <br /> Di-isopropyl ether ND 0 50 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> tert-Amyl methyl ether ND 0 50 " <br /> 1,2-Dichloroethane ND 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 050 ^ <br /> Benzene 7 8 050 <br /> Toluene 4 5 0 50 " <br /> Ethylbenzene 1 0 0 50 ^ <br /> Xylenes(total) 8 0 050 " ^ <br /> Gasoline Range Organics(C6-C10) ND 50 " <br /> Surrogate 12-Dtchloroethane-d4 854% 78-129 " <br /> MW-8 LL0107-04 Water Sampled 11/27/02 09 40 Received 12/02/02 16 50 A-01 <br /> tent-Butyl alcohol ND 20 ug/1 1 2L10015 12/10/02 12/11/02 EPA 8260B <br /> ethyl tert-butyl ether ND 050 if 0-09 <br /> i-isopropyl ether ND 0 50 " <br /> Ethyl tert-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 050 " <br /> 1,2-Dtchloroethane ND 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C6-C10) ND 50 " <br /> Surrogate 1 2-Dtchloroethane-d4 884% 78-129 ^ <br /> I <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analy2ed 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 4 of 9 <br />