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SQ�y y Oia IS Industrial Road <br /> 4 l.i San Carlos CA 94070-4111 <br /> (650) 232-9600 <br /> ' Analytical FAX(650)232-9612 wo <br /> Gcttler-11yan/Geostrategies(1) Project Unocal(1) Sampled 9116/99 <br /> 6747 Sierra Court,Suite D Project Number Unocal SS#5098 Received 9/16/99 <br /> Dublin,CA 94568 Project Manager Deanna Harding Reported 9/30/99 <br /> Forgeable Hydrocarbons(C+ -C12 a-A BT X by DHS UwriQ>l ihty ControI <br /> .n3 <br /> Sequoia Analytical--.Pa-o Carl0 <br /> � <br /> Date Spike Sample QC Reporting Lmut Recov RPD RPD <br /> p, ( a <br /> Analyzed Level Result Result Units Recov Lmuts % Limit % Notes* <br /> Batch: 9090132 - Date Prepared 9129/99- Extraction Method- EPA 5030B [P/TI - <br /> Blank 9090132-BLKI <br /> Purgeable Hydrocarbons as Gasoline 9/29/99 ND ug/1 Soo <br /> Benzene ND 0.500 <br /> Toluene " ND 0.500 <br /> Ethylbenzene ND " 0 500 <br /> Xylenes(total) " ND 0 500 <br /> Surrogate a,a,a-Tnfluorotoluene 100 861 600-140 861 <br /> LCS 9090132-13SI <br /> Benzene 9/29/99 100 847 ug/1 700-130 84 7 <br /> Toluene _ " 10 0 191 700-130 791 <br /> Ethylbenzene 10 0 807 700-130 807 <br /> Xylenes(total) 300 _ 237 700-130 79 0 <br /> Surrogate a a a-Tnfluorotoluene 100 _ 9 15 600-140 915 - <br /> - <br /> LCS 9090332-BS2 <br /> Purgeable Hydrocarbons as Gasoline 9/29199 250 262_ ug/l 700-130 -_105 <br /> Surrogate a,a a-Trifluorotoluene rr100 993 600-140 993 <br />__Matrix Spike 9090132-MS1 L909190-05 <br /> Benzene 9/29/99 100 ND 9-78 ug/I 60 0-14097 8 <br /> Toluene 100 ND 9 05 600-140 905 <br /> Ethylbenzene--- ---T T---- " ----10 0 ND---- 9-11— "------W07--146`911 <br /> — <br /> Xylenes(total) 300 ND 273 _ 600-140 910 <br /> Surrogate a,a a-Trifluorotoluene 10 0 7 71 600-140 771 <br /> Matrix Spike Dun 9090132-MSD1 L909190-05 <br /> Benzene 9/29/99 100 ND 9 02 ug/l 60 0-140 902 250 809 <br /> Toluene 100 ND 839 600-140 83 9 25 0 757 <br /> Ethylbenzene 100 ND 862 600-140 862 250 553 <br /> _Xylenes(total) 300 ND 252 600-140 840 250 800 <br /> Surrogate a a a-Tnfluorotoluene " /00 745 600-140 74 5 <br /> Batch 9090133 Date Prepared _9129199 Extraction Method EPA 5030B IPM <br /> Blank 9090133-BLK 1 <br /> Purgeable Hydrocarbons as Gasoline 9/29/99 ND ug/l 500 <br /> Benzene ND 0 500 <br /> _ Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> —Xylenes(total) - ND-- 0 500 <br /> Surrogate a,a,a-Trifluorotoluene 100 920 600-140 92 0 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 23 of 30 <br />