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680 Ches- Redwood Drive dwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N <br /> VVI lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (9 16)9Z1-9600 FAX(916)921-0100 <br /> 41) <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 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 3/10/99 to 3/11199 <br /> 9912 Business Park Drive,Ste 100 Project Number NIA Received 3/12/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 3126/99 <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-5 5903291-10 Wa' tcC <br /> Purgeable Hydrocarbons 9030250 3/19/99 3/19/99 500 806 ug/I 2 <br /> Benzene " 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Methyl cert-butyl ether 500 ND " <br /> Surrogate a a a-Trifluorotoluene 600-140 114 % <br /> E--1Z S903201-11 ?Yater <br /> Purgeable Hydrocarbons 9030250 3/19/99 3/19/99 500 ND ug/l <br /> Benzene 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> blenes(total) 0 500 ND <br /> e " <br /> thyl tert-butyl ether 5 00 ND " <br /> Surrogate a a a-Trrfluorotoluene 600-140 953 % <br /> MW-1 5903201-12 3YateC <br /> Purgeable Hydrocarbons 9030250 3/19/99 3/19/99 500 104 ug/l 2 <br /> Benzene 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethy[benzene " 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Methyl tert-butyl ether 500 ND " <br /> Surrogate a,a a-Trifluorotoluene 600-140 995 % <br /> E10 5903201-13 Water <br /> Purgeable Hydrocarbons 9030250 3119/99 3/19/99 500 1620 ug/1 3,D <br /> Benzene ItI. Soo 235 D <br /> Toluene It5 00 142 D <br /> Ethylbenzene 5 00 719 D <br /> Xylenes(total) 5 00 859 D <br /> Surrogate a a a-Trifluorotoluene 600-140 941 % <br /> Methyl tert-butyl ether 9030306 3/23199 3/23199 250 3980 ug/l D <br /> Surrogate a,a a-Trifluorotoluene 600-140 774 % <br /> E--R S903201-14 YL' w <br /> Purgeable Hydrocarbons 9030252 3/19/99 3/19/99 500 ND ug/I <br /> Benzene 0 500 ND " <br /> Toluene 0 500 ND " <br /> thylbenzene 0 500 ND " <br /> —'Sequoia Analytical-Sacramento "Refer to end of report for text of notes and definitions <br /> Sandra R Hanson,Client geivices Representative Page 4 of I <br />