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(//�/����\ Sequoia 819 Striker Avenue,Suite 8 <br /> .'`/1 Sacramento.CA 95834 <br /> (916)921-9600 <br /> �� Analytical FAX(916)921-01(X1 <br /> SECOR International Project: ARCO 434, Lodi,CA Sampled: 6/18/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number: N/A Received: 6/18/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 7/6/99 <br /> Volatile Oxygenate Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Not <br /> DSJR5'(continued) 5906335-14 Solt <br /> Ethyl tert-butyl ether 9070009 7/1/99 7/2/99 0.100 ND mg/kg <br /> Ter(-amyl methyl ether 0.100 ND <br /> 1,2-Dichloroethane 0.100 ND " <br /> Surrogate: 1,1-DCA44 60.0-140 114 % <br /> D6(@5' 5906335-16 Still <br /> Tert-butyl alcohol 9070009 7/1/99 7/2/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 ND " <br /> Di-isopropyl ether 0.100 ND <br /> Ethyl tert-butyl ether 0.100 ND " <br /> Ten-amyl methyl ether 0.100 ND " <br /> 1,2-Dichloroethane 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 107 % <br /> D7n5' 5906335-17 - Still <br /> Tert-butyl alcohol 9070009 7/1/99 7/2/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 ND " <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl ten-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.100 NO " <br /> 1,2-Dichloroethane 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 112 % <br /> DS(aw 5906335-18 Solt <br /> Ten-butyl alcohol 9070009 7/1/99 7/2/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 0.107 " <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl ten-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.100 ND " <br /> 1,2-Dichloroethane 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 116 % <br /> Sequoia Analytical-Sacramento `Refer to end ofreport for test ofnotes and definitions. <br /> Page 9 of 14 <br />