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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)36 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 998 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 5111/98 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 5/11/98 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 5113,5/27/98 <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 /> PL4(continued) S805137-04 5-" <br /> Tert-amyl methyl ether 8050246 5119/98 5/19/98 0 100 ND mg/kg <br /> Surrogate 12-DCA-d4 600-140 140 % <br /> P11-5 S805137-05 SAW <br /> Ethanol 8050246 5/19198 5/19/98 150 ND mg/kg <br /> Tert-butyl alcohol 100 ND " <br /> Methyl tert-butyl ether 0 100 0 900 " <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 /> PG_3 5805137-08 SQd <br /> hanol 8050246 5119198 5/19/98 150 ND mg/kg <br /> rt-butyl alcohol 10 0 ND <br /> ethyl tert-butyl.ether 0 100 0 530 " <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 600-140 145 % 3 <br /> 10equota-Analytical-Sacramento '"Refer to end of report for text of notes and definitions <br /> Linda C Schneider,Laboratory Director Page 5 of 10 <br />