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Sequoia <br /> 680 Chesapeake Dr[ve Redwood City CA 94063 (650)364-9600 FAX(650)3649233 <br /> Sequoia 404 iv Wfget Lane Walnut Creek CA 94598 (9Z5)988-%M FAX(925)988-%73 <br /> 1319 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-01oo <br /> 455 <br /> �„�► Analytical 1551 IndusttialttBlvd Road North Ste D � os CAlurna CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> SECOR International Project Chevron 9-6258,Stockton,CA Sampled 4/15/99 <br /> 9912 Business Park Drive,Ste 100 Project Number 7GO07-018-01 Received 4/16/99 <br /> Sacramento,CA 95827 Project Manager Roger I-loffmore Reported 4/30/99 <br /> Volatile Oxygenate Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Anal a Number Pre ared Analyzed Limas Lima Result Units Notes* <br /> MYK1 S904240-01 Water <br /> Tert-butyl alcohol 9040281 4/23/99 4/23199 200 ND ug/1 <br /> Methyl tert-butyl ether 200 ND " <br /> Di-isopropyl ether 200 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> Tert-amyl methyl ether 200 ND " <br /> Ethanol 3000 ND <br /> Surrogate 1 2-DCA-d4 600-140 109 % <br /> MW-2 S904240-02 Water <br /> Tert-butyl alcohol 9040281 4/23/99 4/23/99 200 ND ugli <br /> Methyl tert-butyl ether 200 ND " <br /> Di-isopropyl ether 200 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> Tert-amyl methyl ether 200 ND " <br /> thanol 3000 ND <br /> Surrogate 1 2-DCA-d4 60 0-140 108 % <br /> 93&__3 S904240-03 Water <br /> Tert-butyl alcohol 9040281 4/23/99 4/23/99 200 ND ug/l <br /> Methyl tert-butyl ether 200 ND " <br /> Di-isopropyl ether 200 ND <br /> Ethyl tert-butyl ether 200 ND " <br /> Tert-amyl methyl ether 200 ND " <br /> Ethanol 3000 ND " <br /> Surrogate 12-DCA-d4 600-140 109 % <br /> 0ej,,.;Analyl,cal Sacramento 'Refer to end ur-e orr o-test o notes and ue rnitions <br /> I a p t I 1' I <br /> Sandra R Hanson,Client Services Representative Page 7 of 14 <br />