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r <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 11 Wiget Cane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)929-0100 <br /> %Ar Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792 1865 FAX(707)79z-0342 <br /> 0 <br /> SECOR International Project ARCO 2093,Tracy CA Sampled 12/15/98 <br /> 9912 Business Park Drive,Ste 100 Project Number 7G600-603-04 Received 12/16/98 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 12/30/98 <br /> Total Purgeable Hydrocarbons(C&02),BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> lAnal)le Number Prepared Analyzed Limits Limit Result Units LNotes' <br /> ATR-2 S812223-01 Nater <br /> Purgeable Hydrocarbons 8120246 12/17/98 12/17/98 500 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 500 ND " <br /> Surrogate a a a-Trifluorotoluene 600-140 101 % <br /> ATR4 S812223-02 Water <br /> Purgeable Hydrocarbons 8120246 12/17/98 12/17/98 500 ND ug11 <br /> Benzene 0 500 ND <br /> Toluene 0 500 ND <br /> Ethylbenzene 0 500 ND <br /> enes(total) 0 500 ND <br /> hyl tert-butyl ether 500 ND " <br /> Surrogate a a a-Trrfluorotoluene 600-140 96 0 % <br /> ATR-5 S812223-03 Water <br /> Purgeable Hydrocarbons 8120246 12/17/98 12/17/98 500 134 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 Soo 898 " <br /> Surrogate a a a-Trifluorotoluene 600-140 93 0 % <br /> AD=Z S812223-04 Water <br /> Purgeable Hydrocarbons 8120246 12/17/98 12/17/98 500 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 500 ND <br /> Surrogate a a a-Trifluorotoluene 600-140 95 3 % <br /> ATR-8 S812223-05 Wa ter <br /> Purgeable Hydrocarbons 8120246 12/17/98 12/17/98 500 456 ug/I I <br /> Benzene 0 500 102 <br /> Toluene 0 500 0 690 <br /> Ethylbenzene 0 500 6 12 <br /> nes(total} 0 500 8 49 <br /> Sequoia Analytical-Sacramento 'Refer to end of,eport for text ojttotes and defrruhons <br /> Linda�CSch�, ����Laboratory Director page 2 of 5 <br /> r� <br />