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819 Striker Avenue.Suite 8 <br /> 1 Sequoia Sacramento. -96W <br /> (916)921-96W <br /> 2 921-9604 <br /> FAX(916)9Z 1-0100 <br /> Analytical www.sequolatabs.com <br /> SECOR International -Rancho Cordova Project: ARCO 4493,Stockton,CA Sampled: 6119/00 <br /> 3017 Kilgore Road,Suite 100 Project Number: N/A Received: 6123/00 <br /> Rancho Cordova,CA 95670 Project Manager: Rusty Benkosky Reported: 716/00 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> MW-1 S006320-01 Water <br /> Purgeable Hydrocarbons 0060312 6129100 6/29/00 50.0 ND ug/l <br /> Benzene 0.500 0.692 <br /> Toluene 0.500 ND " <br /> Ethylbenzene 0.500 ND <br /> Xylenes(total) 0.500 ND <br /> Methyl tert-butyi ether _ - 2.50 20.6 " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 2780 % ! <br /> MW-2 5006320-02 Water <br /> Purgeable Hydrocarbons 0060312 6129100 6129/00 50.0 ND ug/1 <br /> Benzene 0.500 ND <br /> Toluene 0.500 ND " <br /> Ethylbenzene 0.500 ND <br /> X (total) 0.500 ND <br /> M�tert-butyl ether _ _ " _ -- - 2_50 - ND " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 189 % 1 <br /> MNy-3 5006320-03 Water <br /> Purgeable Hydrocarbons 0060312 6/29100 6129/00 50.0 ND ug/1 <br /> Benzene " " +' 0.500 ND " <br /> Toluene 0.500 ND " <br /> Ethylbenzene 0.500 ND <br /> Xylenes(total) " 0.500 ND <br /> Meth tent-butyl ether 2.50 278 " <br /> Surrogate: tLAa-Trifluorotoluene 60.0-140 89.4 % <br /> MW4 S006320-04 Water <br /> Purgeable Hydrocarbons 0060312 6129100 6129100 2400 2860 ug/l 2,13 <br /> Benenzene 20.0 186 D <br /> enc 20.0 ND D <br />'Y <br /> 20.0 223 D <br /> Ethylbenzene " <br /> Xylenes(total) 20.0 123 D <br /> Methyl tent-butyl ether 100 3790 D <br /> Surrogate: a,a,a-Trifluorotoluene " " " 60.0-140 92.9 % <br /> L4W-5 5006320-05 Water <br /> Purgeable Hydrocarbons 0060312 6/29100 6129100 50.0 ND ug/I <br /> Benzene 0.500 2.75 " <br /> Toluene " 0.500 ND <br /> Ethylbenzene 0.500 NDXGr " <br /> (tow) + " 0.500 ND " <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 2 of 26 <br />