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819 Striker Avenue,Suite 8 <br /> ' Sequoia Sacramento, 95834 <br /> (9l 6)9Z 921-9600 <br /> FAX(916)921-0 100 <br /> Analytical www.sequoiaiabs.com <br /> SECOR International-Rancho Cordova Project: ARCO 4493,Stockton,CA Sampled: 518100 <br /> 3017 Kilgore Road,Suite 100 Project Number: NIA Received: 5110100 <br /> Rancho Cordova,CA 95670 Project Manager: Rusty Benkosky Reported. 5118/00 <br /> Volatile-Oxygenate_Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> lAnalyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> 19110,16' 5005179-04 Soil <br /> Tert-butyl alcohol 0050147 5/12/00 5/12/00 10.0 ND mg/kg <br /> Methyl tett-butyl ether 0.100 0.254 " <br /> " 0.100 ND " <br /> Di-isopropyl ether It" It <br /> Ethyl tert-butyl ether 0.100 ND to <br /> Tert-amyl methyl ether 0.100 ND <br /> 1,2-Dichloroethane 0.100 ND 1. <br /> Ethylene dibromide 0.100 ND It <br /> Surrogate: 1.2-DCA-d4 60.0-140 95.2 <br /> 61(a)25' 5005179-07 Soil <br /> Tert-butyl alcohol 0050147 5/12/00 5115100 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 ND <br /> Di ropy(ether 0.100 ND " <br /> to <br /> E rt-butyl ether 0.100 ND <br /> T - yl methyl ether 0.100 ND <br /> 0.100 ND <br /> 1,2-Dichloroethanc <br /> " " <br /> Ethylene dibromide 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 94.0 % <br /> BigA-0' 5005179-08 Soil <br /> Tert-butyl alcohol 0050147 5/12/00 5115100 10.0 ND mglkg <br /> Methyl tcrt-butyl ether 0.100 ND " <br /> Di-isopropyl ethex 0.100 ND " <br /> Ethyl tort-butyl ether 0.100 ND " <br /> Ten-®myl methyl ether " 0.100 ND " <br /> 1,2-Dichloroethane " 0.100 ND " <br /> Ethylene dibromide " 0.100 ND " <br /> Surrogate: 1,2-DC4-d4 60.0-140 SZ.B <br /> 81@40' S005179-11 soil <br /> Tert-butyl alcohol 0050147 5112/00 5/15/00 10.0 ND mg/kg <br /> Methyl tett-butyl ether 0.100 ND <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl tert-butyl ether 0. 00 ND " <br /> Tert-amyl methyl ether 0.1100 ND " <br /> 1,2-Dichloroethane 0.100 ND " <br /> Ethylene dibromide 0.100 ND o <br /> Surrogate: 1,2-DCA-d4 60.0-140 81.6 <br /> 819492! S005179-14 Soil <br /> wty I alcohol 0050147 5/12/00 5115/00 10.0 ND mg/kg <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 10 of 22 <br />