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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 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)921-0100 <br /> Analytical 1551 McDowell Blvd North Ste D SanCarlos CA 94070 4I 1 1 (6 0)232-1865 FAX(707)792-0342 <br /> 9600 FAX(650)232-9612 <br /> SECOR International Project ARCO 2093,Tracy,CA Sampled 3117/99 <br /> 9912 Business Park Drive,Ste 100 Project Number 7G600-604-01 Received 3118/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 4/1/99 <br /> Total Purgeable Hydrocarbons(C6-Cl2), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting —:: <br /> Anal a Number Prepared Analyzed Limits Limit Result Units Notes* <br /> AI:13 4(continued) S90326I-05 <br /> Water <br /> Methyl tert-butyl ether 9030308 3/24/99 3/24/99 Soo ND ug/I <br /> Surrogate a a a-Trifluorotoluene 600-140 8S 5 % <br /> AIR-6 S203261-46 Wates <br /> Purgeable Hydrocarbons 9030327 3/24/99 3/24/99 500 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 tent-butyl ether 500 ND " <br /> Surrogate a a a-Triuorotoluene 600-140 806 % <br /> QTR-7 S903261-07 Water <br /> 10rgeable Hydrocarbons 9030327 3/24199 3/24/99 500 ND ug/l <br /> enzene 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Methyl tert-butyl ether 500 ND " <br /> Surrogate a a a-Tnfluoratoluene 600-140 918 % <br /> ATR-2 S903261-0R Water <br /> Purgeable Hydrocarbons 9030327 3/24/99 3/24/99 500 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 5 00 ND " <br /> Surrogate a a a-Trifluorotoluene 600-140 62 7 % <br /> ATR-1 5903261-09 3ya ter <br /> Purgeable Hydrocarbons 9030327 3/24199 3/24/99 500 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 tent-butyl ether 5 00 ND " <br /> Surrogate a a a-Trifluorotoluene 600-140 86 2 % <br /> ATIi� S903261-10 <br /> Water <br /> AmQuirgreable Hydrocarbons 9030329 3/25199 3/25/99 500 652 ug/l I <br /> Sequoia Analytical -Sacramento *Refer to end of report far text of notes and definitions <br /> Sandra R Hanson,Client Services Vepresentative Page 3 of 9 <br />