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Sequoia 680 Chesapeake Dnve Redwood City, CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404N Wiget Lane Walnut Creek CA 94598 (510) 98B 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Secor International Project Unocal 8671,Stockton,CA Sampled 5/11/98 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 5/11/98 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 5/13,5/27/98 <br /> Volatile Organic 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 /> g1,1 5805137-00 sad <br /> Ethanol 8050246 5/19/98 5/19/98 150 ND mg/kg <br /> Tert-butyl alcohol 100 ND " <br /> Methyl tert-butyl ether 1 00 420 <br /> Di-isopropyl ether 0 100 ND " <br /> Ethyl tent-butyl ether 0 100 ND " <br /> Tert-amyl methyl ether 0 100 ND " <br /> Surrogate 1,2-DCA-d4 600-140 118 % <br /> PL-2 5805137-01 SOA <br /> Ethanol 8050246 5/19/98 5/19/98 150 ND mg/kg <br /> Tert-butyl alcohol 100 ND " <br /> Methyl tort-butyl ether 0 100 ND " <br /> Di-isopropyl ether 0 100 ND <br /> yltert�butY <br /> l ether0100NDamymethyl ether 0100 NDurgate 1 2-DCA-d4 " " 60 0-I40 119 <br /> P L-3 5805137-02 Sall <br /> Ethanol 8050246 5/19/98 5/19/98 150 ND mg/kg <br /> Tert-butyl alcohol 100 ND " <br /> Methyl tent-butyl ether 0 100 0 330 <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 600-140 128 % <br /> SW-1 S90137-03 Sit <br /> Ethanol 8050246 5/19/98 5/19/98 150 ND mg/kg <br /> Tert-butyl alcohol 100 ND " <br /> Methyl tert-butyl ether 0 100 610 " <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 600-140 135 % <br /> PL-4 5805137-04 soil <br /> Ethanol 8050246 5/19/98 5/19/98 150 ND mg/kg <br /> Tert-butyl alcohol too ND " <br /> Methyl tert-butyl ether 0 100 2 15 " <br /> Di-isopropyl ether 0 100 ND " <br /> Oyl tert-butyl ether 0 100 ND " <br /> quoia Anal tical-�Sacraqxnto *Refer to end of report for lent of notes and defintttons <br /> Linda C Schneider,Laboratory Director Page 4 of 10 <br /> r�i <br />