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• 885 Jarvis Drive <br /> a— ) <br /> Sequola Morgan Hill,CA 95037 <br /> Analytical (408)776-9600 <br /> FAX 408 782-6308 <br /> www.sequoialabs.con <br /> URS Corporation f 11 Project: ARCO#760,Lodi,CA. <br /> ' 2870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO#760,Lodi,CA Reported: <br /> Sacramento CA,95833 Project Manager: Vern Elarth 10/24/02 08:51 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> ' Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> ' MW-I (MLJ0230-01)Water Sampled:10/03/02 16.25 Received:10/04/02 15.30 <br /> tert-Butyl alcohol ND 20 ug/1 1 2J21016 10/17/02 10/17/02 EPA 8260B <br /> ' Methyl tert-butyl ether 0.91 0.50 <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 17 0.50 <br /> Ethylene dibromide ND 0.50 <br /> Surrogate:1,2-Dichloroethane-d4 108% 78-129 " <br /> ' MW-2(MLJ0230-02)Water Sampled:10/03/02 15.40 Received:10/04/02 15.30 <br /> tert-Butyl alcohol ND 20 ug/I 1 2J21016 10/17/02 10/17/02 EPA 8260B <br /> Methyl tert-butyl ether 3.7 0.50 " <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 26 0.50 <br /> Ethylene dibromide ND 0.50 " <br /> Surrogate:1,2-Dichloroethane-d4 105% 78-129 " <br /> MW-3(MLJ0230-03)Water Sampled-10/03/02 15.00 Received:10/04/02 15:30 <br /> tert-Butyl alcohol ND 20 ug/l I 2J21016 10/17/02 10/17/02 EPA 8260B <br /> Methyl tert-butyl ether ND 0.50 " <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 6.2 0.50 <br /> Ethylene dibromide ND 0.50 " <br /> Surrogate:1,2-Dichloroethane-d4 98.0% 78-129 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. This analytical report must be reproduced in its entirety. <br /> ' 3 of 6 <br />