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Sequoia San Carlos <br /> Industrial Road <br /> los CA 91070-41 It <br /> (650) 232-9600 <br /> Analytical FAX(650) 232-9612 <br /> Settler-Ryan/Geostrategics(1) Project Unocal(1) Sampled 11/23/99 <br /> 1747 Sierra Court, Suite D Project Number Unocal SS#0187/Job#280045 Received 11/24/99 <br /> hrbhn,CA 94568 Pro ect Mana er Deanna Harding R orted 12/10/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-San Carlos <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> knalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> XS(continued) 9120022-BS1 <br />?thylbenzene 12/6/99 100 898 ug/l 70 0-130 $9 8 <br /> Xylenes(total) 300 270 It700-130 900 <br /> Surrogate a,a,a-Trrfluorotoluene 100 837 If 700-130 837 <br /> GCS 9120022-BS2 <br /> Purgeable Hydrocarbons as Gasoline 1216/99 250 215 ug/1 700-130 860 <br /> Surrogate a,a,a-Tnfluorotoluene ry100 789 700-130 789 <br /> Watnx Spike 9120022-MSI L912037-05 <br /> Purgeable Hydrocarbons as Gasoline 12/6/99 250 ND 242 ug/t 600-140 968 <br /> Surrogate a a,a-Trrfluorotoluene 0100 881 700-130 881 <br /> Matrix Spike DUR 9120022-MSDI L912037-05 <br /> Pu le Hydrocarbons as Gasoline 12/6/99 250 ND 238 ug/l 600-140 952 25 0 167 <br /> YulWre a s a-Trrfluorotoluene 100 983 11700-130 983 <br /> Batch 9120023 Date Prepared 12/6199 Extraction Method EPA 5030B IPIT <br /> Blank 9120023-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 12/6/99 ND ug/I 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) " ND 0 500 <br /> Methyl tert-butyl ether ND Soo <br />.Surrogate a a,a-Trrfluorotoluene 100 956 700-130 956 <br /> LCS 9120023-BSI <br /> Benzene 12/6/99 100 886 ug/i 700-130 886 <br /> Toluene 100 8 52 700-130 85 2 <br /> Ethylbenzene 100 843 70 0430 84 3 <br /> Xylenes(total) 300 25 6 700-130 853 <br /> Surrogate a a,a-Trrfluorotoluene 100 924 700-130 924 <br /> LCS 9120023-BS2 <br /> Purgeable Hydrocarbons as Gasoline 1216/99 250 216 ug/1 70 0-130 86 4 <br /> Surrogate a a a-Trifluorotoluene 100 938 700-130 938 <br /> Matrix SnM 9120023-MSI L911287-07 <br /> PurgeaMe Hydrocarbons as Gasoline 12/6/99 250 ND 276 u9/1 600-140 110 <br /> Surrogate a,a a-Trrfluorotoluene 100 111 700-130 111 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 23 of 28 <br />