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1551 Industrial Road <br /> Sequoia. �'`�°�'`A�°'°�"' <br /> (650)232-9600 <br /> FAX(650)232-%12 <br /> www-segWa]Wn.corn <br /> Analytical <br /> G�tler-RyanlGeostrategies{1) Project: Tosco(2) Sampled: 8/28/00 <br /> 6747 Si6rra Court,Suite J Project Number. Unocal SS#11195/16500 So.Interstate 1-5,LathRageived: 8128100 <br /> Dublin,CA 94568 Project Manager, Deanna Hardin 9114/00 <br /> Boom <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Anai Level Result Result Units Recov.Limits % Limit % Notes* <br /> Batch: 0090019 Date Prepared- 916/00 Extraction Method: EPA 5030B FEM <br /> Blank 0090019-BLKl <br /> Purgeable Hydrocarbons as Gasoline 916100 ND ug/1 50.0 <br /> Benzene " ND 0.500 <br /> Toluene ND 0.500 <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) " ND 0.500 <br /> Methyl tent-butyl ether ND 5.00 <br /> Surrogate: a,aa-Tnfluoriotoluene " 10.0 10.3 " 70.0-130 103 <br /> LCS 0090019-BSI <br /> Benzene 9/6100 10.0 10.1 U911. 70.0-130 101 <br /> Toluene 10.0 9.49 70.0-130 94.9 <br /> Ethylbenzene 10.0 9.38 70.0-130 93.8 <br /> en (total) 30.0 28.6 " 70.0-130 95.3 <br /> =. gale: a,aa-Tnfluorotoluene 10.0 11.3 " <br /> 70.0-130 113 <br /> LCS 0090019-BS2 <br /> Purgeable Hydrocarbons as Gasoline 9/6/00 250 235 ug/1 70.0-130 94.0 <br /> Surrogate: aa,a-Tdfluoriotoluene " 10.0 12.9 " 70.0-130 129 <br /> Matrix Spike 0090019-MS1 L009207--03 <br /> Benzene 9/6100 10.0 ND 11.2 U94 60.0-140 112 <br /> Toluene 10.0 ND 10.4 60.0-140 104 <br /> Ethylbenzene 10.0 ND 10.5 60.0-140 105 <br /> Xylenes(total) " 30.0 ND 32.2 " 60.0-140 107 <br /> Surrogate: a,aa-Trifluorotoluene 10.0 10.5 70.0-130 105 <br /> Matrix Spike DUD 0090019-MSD/ L008207-03 <br /> Benzene 916100 10.0 ND 11.2 ug/1 <br /> 60.0-140 112 25.0 0 <br /> Toluene 10.0 ND WA 60.0-140 104 25.0 0 <br /> Ethylbenzene 10.0 ND 10.6 60.0-140 106 25.0 0.948 <br /> Xylenes(total 30.0 ND 32.3 60.0-140 106 25.0 0.930 <br /> Surrogate: a,a,a-Tnfluorotoluene " 10.0 10.8 70.0-130 108 <br /> Batch: 0090020 Date Prepared: 4/6/00 Extraction.Method: EPA 5030B <br /> Blank 0090020-BLKI <br /> Purgeable Hydrocarbons as Gasoline 916/00 ND ug/1 50.0 <br /> Benzene ND " 0.500 <br /> Toluene ND. 0.500 <br /> Ethylbanzeoe " ND 0.500 <br /> 0-500'Renes(total) ND <br /> SequoiaAnalytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 14 of 20 <br />