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404 N Wiget Lane <br /> Seq�y oia Walnut Creek CA 94598 <br /> 4 1.1 (925)988-9600 <br /> FAX(925)988%73 <br /> Analytical www sequaalabs tom <br /> l <br /> cor-Rancho Cordova Project Arco <br /> 17 Kilgore Rd,Ste 9100 Project Number Arco 4 4932 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 26-Jul-01 12 27 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> talyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> ,B-1,24' (W107170-01)Soil Sampled 09-Jul-01 00 00 Received i I-Jul-01 1235 <br /> Butyl alcohol ND 2 5 mg/kg l00 IG16023 20-Jul 01 20-Jul 01 EPA 8260B <br /> thy]tert-butyl ether ND 020 " <br /> )i-isopropyl ether ND 0 10 " <br /> yl ten-butyl ether ND 0 10 " <br /> -Amyl methyl ether ND 010 " <br /> -Diehl oroethane ND 010 " <br /> 2-Dibromoethane ND 020 - <br /> Irogate Dibromofluoromethane 104% 50-150 " <br /> rogate 1 2-Dichloroeihane-d4 960% 50-150 <br /> 1,31'(W107170-02)Soil Sampled 09-Jul-010000 Received 11-Jul-01 12 35 <br /> Butyl alcohol ND 2 5 mglkg 100 IG16023 20-Jul-01 20-Jul-01 EPA 8260B <br /> -Butyl <br /> tert-butyl ether ND 020 <br /> 0soro <br /> pyl ether ND 010 " <br /> butyl ether ND 010 <br /> I methyl ether ND 010 " <br /> 1,2-Dcchloroethane ND 010 <br /> Dtbromoethane ND 020 <br /> ogate Dibromofluoromethane 102% 50-150 " <br /> surrogate 1,2-Dichloroethane-d4 980% 50-150 " <br /> 1,42,(W107170-03)Sod Sampled 09-Jul-01 00 00 Received I I-Jul-01 12 35 <br /> -Butyl alcohol ND 25 mg/kg 100 IG16023 20-Jul-01 20-Jul-01 EPA 8260B <br /> Methyl tert-butyl ether ND 020 " <br /> ty"Amyl <br /> opropyl ether ND 010 <br /> l tcrt-butyl ether ND 010 methyl ether ND 010 " <br /> 1,2-Dtchloroethane ND 010 <br /> a-Dibromoethane _ __- ND <br /> 020 " <br /> agate Dr6romofluoromethane 106% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 980% 50-150 " <br /> 1 <br /> Analytical - Walnut Creek The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody documew This analytical report must be reproduced in its entirety <br /> 1 <br /> Page 4 of 13 <br /> 1 �a> <br />