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a <br /> 819 Striker Avenue Suite 8 <br /> 834 <br /> Sequoia <br /> Sacramento(916)921959600 <br /> 4 FAX(916)921-0100 <br /> Analytical www seguoiaiaes`om <br /> SECOR International-Rancho Cordova Project ARCO 595,Stockton,CA Sampled 6/1100 to 616/00 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Received 6/8/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 6/19100 <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 Notes* <br /> MW-3070(continued) 5006120-65 Soil <br /> Di-isopropyl ether 0060134 6/15/00 6117100 0 100 ND mg/kg <br /> Ethyl tert-butyl ether 0 100 ND " <br /> Tert-amyl methyl ether 0 100 ND " <br /> 1,2-Dichloroethane 0100 ND " <br /> Ethylene dibromide 0 100 ND <br /> Surrogate 12-DCA-d4 600-140 106 % <br /> MW-3x,75 5006120-66 Soil <br /> Tert-butyl alcohol 0060134 6/15100 6/17/00 100 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 /> Tert-amyl methyl ether 0 100 ND " <br /> hloroethane « 0100 ND ' <br /> EIWne dtbromide 0 100 ND <br /> Surrogate 12-DCA-d4 600-140 107 % <br /> MW4(a)55 5006120-77 Soil <br /> Tert-butyl alcohol 0060134 6/15/00 6117/00 100 ND mg/kg <br /> Methyl tent-butyl ether 1. 0 100 ND " <br /> Di-isopropyl ether 0 100 ND " <br /> Ethyl tert-butyl ether ti0 100 ND " <br /> Tert-amyl methyl cther 0 100 ND " <br /> 1,2-Dichloroethane 0100 ND " <br /> Ethylene dtbromtde 0 IDO ND " <br /> Surrogate 1,2-DCA-d4 600-140 106 % <br /> MW4(a,60 5006120-78 Soil <br /> Tert-butyl alcohol 0060134 6115/00 6/17/00 100 ND mg/kg <br /> Methyl tent-butyl ether 0 100 0 308 " <br /> Di-isopropyl ether 0 100 ND " <br /> Ethyl tent-butyl ether 0 100 ND " <br /> Tert-amyl methyl ether 0 100 ND " <br /> 1,2-Drchloroethane 0100 ND " <br /> Ethylene dibmmide 0 100 ND " <br /> Surrogate 1,2-DCA-d4 600-140 103 % <br /> MW4 65 5006120-79 Soil <br /> Tert-butyl alcohol 0060134 6/l5/00 6/17100 100 ND mg/kg <br /> Methyl tert-butyl ether 0 100 ND " <br /> ropy[ether 0 100 ND " <br /> Sequoia Analytical-Sacramento *Refer to end ofreport for text of notes and definitions <br /> Page 18 of 27 <br />