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• 885 Jarvis 5037 <br /> Sequoia MorganHill)76 90600 <br /> Analytical FAX(408) <br /> www sequaialiatabs bs coinom <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MNG0371 <br /> 3017 Kilgore Rd Suite 100 Project Number 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager RustyBenkosky 08/03/04 16 21 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result GmH Units Dilution Batch Prepared Analyzed Method Now <br /> MW-1(MNG0371-01)Water Sampled 07/14/041130 Received 07/14/041340 <br /> tert-Amyl methyl ether ND 50 ug/i 100 4G21002 07/21/04 07/21/04 EPA 8260B <br /> Benzene ND 50 " <br /> tert-Butyl alcohol ND 2000 " <br /> Di-isopropyl ether ND 50 " <br /> 1,2-Dtbromoethane(EDB) ND 50 " <br /> 1,2-Dichloroethane 100 50 " <br /> Ethanol ND 10000 " <br /> Ethyl tert-butyl ether ND 50 ^ " <br /> Ethylbenzene ND 50 " <br /> Methyl tert-butyl ether 4200 50 " <br /> Toluene ND 50 " <br /> Xylenes(total) ND 50 " <br /> Gasoline Range Organics(C4-C12) ND 5000 " <br /> Surrogate 1 2-Dichloroethane-d4 114% 78-129 <br /> MW-2(MNG0371-02)Water Sampled 47/14/04 11 57 Received 07/14/04 13 40 <br /> tert-Amyl methyl ether ND 5 0 ug/l 10 4G23004 07/23/04 07/23/04 EPA 8260B <br /> Benzene ND 5 0 " <br /> tert-Butyl alcohol 380 200 " <br /> Di-isopropyl ether ND 5 0 " <br /> 1,2-Dtbromoethane(EDB) ND 5 0 ^ " <br /> 1,2-Dichloroethane 7 6 5 0 " <br /> Ethanol ND 1000 IC <br /> Ethyl tert-butyl ether ND 5 0 ^ " <br /> Ethylbenzene ND 5 0 ^ <br /> Methyl tert-butyl ether 300 5 0 ^ " <br /> Toluene ND 5 Q <br /> Xylenes(total) ND 5 0 ^ " <br /> Gasoline Range Organics(C4-C12) ND 500 <br /> Surrogate 1,2-Dichloroethane-d4 92% 78-129 " <br /> Sequoia 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 4 of 24 <br />