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680 <br /> City,CA <br /> (650)364-9600 FAX�650)364-9Z33 <br /> Chesapeake <br /> DriveRedwood <br /> Walnut Creek,CA 94598 3 <br /> Sequoia 404 NWiget La (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1551 McDowell t3�iv�d.North,Ste. D Petaluma,CalosC A94954 (707)94070-4111 (650)232-9865 FAX(707)79Z-0342 <br /> 600 FAX(650)232-9612 <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 2/24199 to 2/25/99 <br /> 9912 Business Park Drive, Ste. 100 Project Number: N/A Received: 2126/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 315/99 <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 /> T3 W-12 S903005-03 S1111 <br /> Tert-butyl alcohol 9030021 3/1/99 3/3/99 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 /> Tert-amyl methyl ether 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 " 60.0-140 96.4 % <br /> 13E-13 5903005-04 &L <br /> Tert-butyl alcohol 9030021 3/1/99 3/3199 10.0 ND mg/kg <br /> Methyl ter-butyl ether 0.100 ND " <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl tert-butyl ether 0.100 ND " <br /> Zart <br /> amyl methyl ether 0.100 ND " <br /> Surrogate. 1,2-DCA-d4 " " " 60.0-140 108 %y <br /> D3-3 S903005-10 Ssil <br /> Tert-butyl alcohol 9030021 3/1/99 3/3199 10.0 ND mg/kg <br /> Methyl tert-butyl ether " 0.100 ND " <br /> Di-isopropyl ether 1. 0.100 ND " <br /> Ethyl ter-butyl ether 1. 0.100 ND " <br /> Tert-amyl methyl ether 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 105 % <br /> L5--4 5903005-11 Soil <br /> Tert-butyl alcohol 9030021 3/1/99 3/3/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether " 0.100 ND " <br /> Di-isopropyl ether It " 0.100 ND " <br /> Ethyl tert-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 97.1 % <br /> L2--fi S903005-14 mil <br /> Tert-butyl alcohol 9030021 3/l/99 3/3199 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 /> �Lgt-amyl methyl ether 0.100 ND " <br /> equo�nalytical-Sacramento - _ "Refer to end of report for text of notes and definitions. <br /> I <br /> Sandra R. Hanson,Client Services Representative Page 12 of 21 <br /> I <br />