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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-8673 <br /> 819 Striker Avenue Suae 8 Sacramento CA 95834 (916)921 9600 FAX(916)92 1-0100 <br /> �„�► 7) 792-0342 <br /> Analytical `555 McDowell <br /> North Ste D SaPetalumaCarlos CA 94070 41 1 1 (650) 232-9600 FAX(6050)232-9612 <br /> s <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 3/18199 <br /> 9912 Business Park Drive, Ste 100 Project Number 7G600-019-04 Received 3/18/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 3/23/99 <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 Notes* <br /> S--2 S23ZQ,Z52-01 Still <br /> Tert-butyl alcohol 9030275 3122/99 3122/99 100 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 /> Ethanol 150 ND <br /> Surrogate 12-DCA-d4 600-140 103 % <br /> S14 13903252-02 SAW <br /> Tert-butyl alcohol 9030275 3/22/99 3/22199 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 /> aamyl methyl ether 0 100 ND " <br /> nol- .._.....__......._ 150 ND <br /> Surrogate 12-DCA-d4 600-140 101 % <br /> equola Analytical -Sacramento *Refer to end of report for text of notes and definutons <br /> 4 <br /> Sandra R Hanson,Client Services Representative Page 4 of 8 <br />