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Sequoia <br /> 819 Striker Avenue,Suite 8 <br /> S e quola Sacramento.Ca 95834 <br /> (916)92l'-9600 <br /> Analytical FAX equo 9abs,co 0 <br /> tivwwsequoiatabs.com <br /> Stratus Environmental Project: ARCO 5469,Stockton,CA Sampled: 6123%00 <br /> 3330 Cameron Park Drive, Ste. 550 Project Number: N/A Received: 6/23100 <br /> Cameron Park,CA 95682 Project Manager: Jay Johnson Reported: 7/10/00 <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-1 S006324-01 Water <br /> Tert-butyl alcohol 0060288 7/3/00 7/3100 200 ND ug/l <br /> Methyl tert-butyl ether 2.00 ND " <br /> Di-isopropyl ether 2.00 ND <br /> Ethyl tert-butyl ether " " 2.00 ND „ <br /> Tert-amyl methyl ether 2.00 ND " <br /> Ethanol 3000 ND " <br /> 1,2-Dichloroethane 2.00 ND " <br /> Ethylene dibromide 2.00 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 99.6 % <br /> A'IW-2 5006324-02 Water <br /> Tert-butyl alcohol 0060288 713/00 713100 200 ND ug/l <br /> Methyl tert-butyl ether 2,00 ND " <br /> 0opropyl ether „ „ 2.00 ND I' <br /> 1 tert-butyl ether 2.00 ND <br /> Tert-amyl methyl ether 2.00 ND " <br /> Ethanol 3000 ND " <br /> 1,2-Dichloroethane 2.00 ND " <br /> Ethylene dibromide 2.00 ND " <br /> Surrogate: 1,2-DCA-d4 60.0440 110 % -- <br /> MW-3 5006324-03 Water <br /> Tert-butyl alcohol 0060288 7/3100 713100 200 ND ug/l <br /> Methyl tent-butyl ether 2.00 19.2 " <br /> Di-isopropyl ether 2.00 ND " <br /> Ethyl tert-butyl ether 2.00 ND " <br /> Tert-amyl methyl ether 2.00 ND " <br /> Ethanol 3000 ND " <br /> 1,2-Dichloroethane " " " 2.00 ND " <br /> Ethylene dibromide 2.00 ND <br /> Surrogate: 1,2-DCA-d4 60.0-140 116 % <br /> MW-4 S006324-04 Water <br /> Tert-butyl alcohol 0060288 713100 713/00 200 ND ug/1 <br /> Di-isopropyl ether 2.00 ND " <br /> Ethyl tent-butyl ether 2.00 ND " <br /> Tert-amyl methyl ether 2.00 ND " <br /> Ethanol 3000 ND " <br /> 1,2-Dichloroethane " <br /> 2.00 ND <br /> Ethylene dibromide " " <br /> 2.00 ND <br /> gate: 1,2-DCA-d4 " " 60.0-140 116 % <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 5 of 13 <br />