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1 sequoia 444 N CA 598 <br /> Walnut Creek CA 94598 <br /> (925)988 9600 <br /> Analytical wFAX(925)988 9673 <br /> wav sequoiala6s com <br /> tancho <br /> Rancho Cordova Project Arco <br /> 17 Kilgore Rd Ste #100 Project Number Arco#4932, Stockton Reported <br /> Cordova CA 95670 Project Manager Rusty Benkosky 27-Jul-01 14 25 <br /> ' Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> alyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> 2,26 5'(W 107244-01)Soil Sampled 11-Jul-01 00 00 Received 13-Jul-01 13 35 <br /> .rt-Butyl alcohol ND 25 mg/kg 100 IG25009 25-Jul 01 25-Jul 01 EPA 8260B <br /> thyl tert-butyl ether 73 020 <br /> isopropyl ether ND 010 " <br /> :thyl tertbutyl ether ND 010 " <br /> '- myl methyl ether ND 010 " <br /> -ADichloroethane ND 010 <br /> -,2-Dibromoethane ND 020 " <br /> Flogate Dibromofluoromethane - --------_. 108°/a �-v50-150 -- -�_ '�-Y—_- — ------ -- - - - <br /> ogate 1 2-Dichloroethane-d4 96 0% 50-150 " <br /> ;B-2,40'(W107244-02)Soil Sampled I I-Jul-01 00 00 Received 13-Jul-01 13 35 <br /> -Butyl alcohol ND 25 mg/kg 100 IG25009 25-Jul-01 25-Jul-01 EPA 8260B <br /> Bthyl tert-butyl ether ND 020 <br /> I <br /> isopropyl ether ND 010 <br /> 01c -butyl ether ND 010 " <br /> I methyl ether ND 010 <br /> oroethane ND 010 <br /> 1,2-Dibromoethane ND 020 <br /> trogate Dibromofluoromethane 109% 50-150 <br /> ragate 1 2-Dichloroethane-d4 980% 50-150 " <br /> 38-2,601(W107244-03)Sod Sampled 11-Jul-01 00 00 Received 13-Jul-01 13 35 <br /> -Butyl alcohol ND 25 mg/kg 100 1G25009 25-Jul-01 25-Jul-01 EPA 8260B <br /> I*thyl tert-butyl ether ND 020 <br /> Di-isopropyl ether ND 010 <br /> yl tent-butyl ether ND 010 " <br /> -Amyl methyl ether ND 010 " <br /> I -Dichloroethane ND 010 <br /> -Dibromoethane ND 020 " « <br /> rrogate Dibromofluoromethane 103% 50-150 " <br /> ogate 1 2-Dichloroethane-d4 940% 50-150 " <br /> 1 <br /> 1 <br /> quota Analytical- Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> ' Page 4 of 15 <br />