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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)3649600 FAX(650)364-9233 <br /> 4IN 404 N.Wiget lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-%73 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1555 IndusMcDtrial <br /> SoadlvdNorth,Ste. D San ta(uma,CACarlos,CA94954 (707) 792- 865 FAX(707)792-032 <br /> 94070-41 11 (6 0)232-19600 FAX(650)232-9612 <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 2/24199 to 2/25/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number: N/A Received: 2/26/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 3/5/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUPT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> D3-3(cotItInILtQ S903005-10 mil <br /> Benzene 9030048 3/2/99 3/2/99 0.00500 ND mg/kg <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-Triuorotoluene 60.0-140 92.5 % <br /> 1.5_4 S903005-11 SAW <br /> Purgeable Hydrocarbons 9030048 3/2/99 3/2/99 1.00 1.65 mg/kg 4 <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 0.00560 " <br /> methyl tert-butyl ether 0.0500 ND " <br /> agate: a,a,a-Trifluorotoluene 60.0-140 94.0 % <br /> L6-3.5 5903005-12 54i1 <br /> Purgeable Hydrocarbons 9030048 3/2/99 3/2/99 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 93.0 % <br /> L 1 3,5 5903005-13 S" <br /> Purgeable Hydrocarbons 9030048 3/2199 3/2/99 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 0.0838 " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 90.5 % <br /> L.2A 5903005-14 54.d <br /> Purgeable Hydrocarbons 9030048 3/2/99 3/2/99 1.00 1.53 mglkg 2 <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 0.0211 " <br /> thy/ tert-butyl ether 0.0500 ND " <br /> equoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Sandra R. Hanson,Client Services Representative Page 5 of 21 <br />