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819 Striker Avenue Suite 8 <br /> ' Sacramento CA 95834 <br /> 1 equola (916)921-96W <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> SECOR International-Rancho Cordova Project ARCO 2093,Tracy,CA Sampled 6/7/00 <br /> 3017 Kilgore Road,Suite 100 Protect Number N/A Received 6/8100 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 6/22/00 <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 /> ATR-2 5006126-01 Water <br /> Purgeable Hydrocarbons 0060212 6121/00 6/21/00 500 ND ug/l <br /> Benzene 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br />_Methyl tert-butyl ether "_ 250 126 <br /> Surrogate a,a,a-Trifluorotoluene 600-140 958 % <br /> ATR-4 S006126-02 Water <br /> Purgeable Hydrocarbons 0060212 6/21/00 6/21/00 500 ND ug/l <br /> Benzene 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> X (total) 0 500 ND " <br /> NW tent-butyl ether _ _ _ 250 $42 <br /> Surrogate a a a-Trifluorotoluene 600-140 953 % <br /> ATR-7 5006126-03 Water <br /> Purgeable Hydrocarbons 0060212 6121/00 6/21100 500 ND ug/l <br /> Benzene 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) _ " " 0 500 _ ND <br /> Surrogate a,a,a-Trrfluorotoluene 600-140 986 <br /> Methyl tert-butyl ether 500 572 ug/l D <br /> Surrogate a,a a-Trrfluorotoluene 600-140 106 % <br /> ATR-8 5006126-04 Water <br /> Purgeable Hydrocarbons 0060212 6/21/00 6/21100 250 576 ug/l I,D <br /> Benzene 250 482 D <br /> Toluene 250 ND D <br /> Ethylbenzene 250 8 43 D <br /> Xylenes(total) 250 ND D <br /> Methyl tert-butyl ether _ _ _ _ _ 12 5 ___ ND " _ —_D _ <br /> Surrogate a a a-Trrfluorotoluene 600-140 103 % <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 2 of 4 <br />