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Sequoia Walnut <br /> N Wilane <br /> t Creek CAA 94598 <br /> (925)988-9600 <br /> FAX(925)988 9673 <br /> Analytical www sequolalabs com <br /> ecor-Rancho Cordova Prolt ct Arco <br /> Oil Ktlgore Rd Ste #100 Project Number Arco# 595 Stockton Reported <br /> ancho Cordova CA 95670 Project Manager Rusty Benkosky 29-Aug-01 11 31 <br /> ' Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> alyte Result I imtt Units Dilution Hatch Prepared Anal)7ed Method Notes <br /> W�V7,29'(W107334-07)Soil Sampled 16-Jul-01 00 00 Received 19-Jul-01 14 20 <br /> Butyl alcohol ND 25 mg/kg 100 IG27018 26-Jul 01 29-Jul 01 CPA 826011 <br /> thyl tert-butyl ether(MTB[--) ND 020 <br /> isopropyl ether ND 0 10 <br /> ;thy]tert-butyl ether ND 0 10 <br /> -Amyl methyl ether ND 0 10 <br /> -Dichloroethane ND 0 10 " <br /> 12-Dibromoethane ND 020 <br /> rogate Dibromofluoromelliane 796 % 50-150 <br /> rogate 12-Dichloroethane-d4 940 % 50-150 <br /> MW7,35'(W107334-08)Sod Sampled 16-Jul-01 00 00 Received 19-Jul-01 14 20 <br /> Butyl alcohol ND 2 5 mg/kg 100 IG27018 26-Jul-DI 29-Jul 01 EPA 82604 <br /> thyl tert-butyl ether(MTBE) ND 020 " <br /> Di-isopropyl ether ND 0 10 <br /> I- <br /> butyl ether ND 0 10 " <br /> I methyl ether ND 0 10 <br /> Dichloroethane ND 010 <br /> 12-Dibromoethane ND 020 " <br /> trogate Dibromofluoromethane 108% 50-150 <br /> rogale 12-Dichloroethane-d4 996% 50-150 <br /> MW7,40'(W107334-09)Sod Sampled 16-Jul-01 00 00 Received 19-Jul-01 14 20 <br /> -Butyl alcohol ND 25 mg/kg 100 1G27018 26-Jul-01 29-Jul-0I EPA 8260E <br /> thyl tert-butyl ether(MTBE) ND 020 <br /> Di-isopropyl ether ND 0 10 " <br /> yl tert-butyl ether ND 010 <br /> -Amyl methyl ether ND 0 10 « <br /> 1,2-Dichloroethane ND 010 " <br /> -Dibromoethane ND 020 <br /> rogate Dibromofluoromethane 101 % 50-150Ir,rogate 12-Dichloroethane-d4 948% 50-150 <br /> i <br /> 1 <br /> quota Analytical- Walnut Creek The results in this report apply to the samples analyzed in accordance wish the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> ' Page 8 of 16 <br /> i <br />