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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650)364 9Z33 <br /> 4 4D 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 /> 4„D Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)79Z-1865 FAX(707) 792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-41 11 (650)232-9600 FAX(650) Z32-9612 <br /> SECOR International Project TOSCO 8671,Stockton,CA Sampled 2/15/99 <br /> 9912 Business Park Drive,Ste 100 Project Number 7G888-010-01,Task# 12 01 Received 2/16199 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 3/2/99 <br /> Total Purgeable Hydrocarbons(C6-C12) and BTEX 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 S902230-01 Water <br /> Purgeable Hydrocarbons 9020249 2/19/99 2/19/99 500 ND ug/l <br /> Benzene 0 500 106 " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Surrogate a,a,a-Trifluorotoluene 600-140 90 5 % <br /> MW-2 S902230-02 Water <br /> Purgeable Hydrocarbons 9020249 2/19199 2119199 500 100 ug/l 1 <br /> Benzene 0 500 3 56 " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Surrogate a a,a-Triuorotoluene 600-140 110 % <br /> S902230-03 Water <br /> Purgeable Hydrocarbons 9020249 2119/99 2/19/99 500 ND ug/l <br /> Benzene 0 500 2 59 " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Surrogate a a a-Trifluorotoluene 600-140 961 % <br /> MWA S902230-04 Water <br /> Purgeable Hydrocarbons 9020249 2/19/99 2/19/99 Soo ND ug/l <br /> Benzene 0 500 0 732 " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Surrogate a,a,a-Trrfluorotoluene 600-140 101 % <br /> quoia Ana9yucal-Sacramento *Refer to end of report for text of notes and definitions <br /> Sandra R Hanson,Client Services Representative Page 2 of 6 <br />