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680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> Sequoia 404 N.Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925}988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)92 1-0 100 <br /> Analytical 1455 McDowell Blvd.North,Ste,D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-41 1 1 (650)232-9600 FAX(650)23 2-961z <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 2110/99 to 2/12/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number. N/A Received: 2116/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 312199 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> i <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> M)Y 2 n24(contin lgd.) 5902231-10 X IJa <br /> Methyl tert-butyl ether 9020225 2/18/99 2/18199 0.0500 ND mg/kg <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 95.0 % <br /> MW-2 925 $202231-11 SUR <br /> Purgeable Hydrocarbons 9020200 2/18/99 2/18/99 1.00 ND mg/kg <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 ND " <br /> Methyl tent-butyl ether 0.0500 ND " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 94.0 <br /> MW-3 la7.10 S902231-1SSW <br /> eable Hydrocarbons 9020200 2118/99 2/18/99 1.00 ND mg/kg <br /> IqWzene 0.00500 ND <br /> Toluene 0.00500 ND <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 ND " <br /> Methyl tert-butyl ether 0.0500 ND " <br /> Surrogate: a,a,a-Trifluorotoluene " " " 60.0-140 82.0 % <br /> MW-3 k20 5902231-15 &H <br /> Purgeable Hydrocarbons 9020200 2/18199 2/18/99 1.00 ND mg/kg <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 ND <br /> Methyl tert-butyl ether 0.0500 ND <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 88.5 % <br /> M)Y-3 k25 S902231-16 S(W <br /> Purgeable Hydrocarbons 9020246 2/19199 2/19/99 1.00 ND mg/kg <br /> Benzene 0.00500 0.0521 <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND <br /> Xylenes(total) 0.00500 ND <br /> Methyl tert-butyl ether 0.0500 0.489 " <br /> Surrogate: a,a,a-Trifluorololuene " " " 60.0-140 98.0 % <br /> MW-4 Q10 S902231-18 S411 <br /> geable Hydrocarbons 9020246 2/19/99 2/19199 1.00 ND mg/kg <br /> Sequoia Analytical-Sacramento *Refer to end of report far text of notes and definitions. <br /> /<?/;? 2_TL <br /> Sandra R. Hanson,Client Services Representative Page 3 of l5 <br />