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1551 industrial Road <br /> Sequoia �n �.CA 94070-4111 <br /> (650)2-3Z-9600 <br /> 1 4 FAX(650)232-9612 <br /> Analytical www.sequoialabs.com <br /> Gettler-Ryan/Geostrategies(1) Project: Tosco(2) Sampled: 515100 <br /> 6747 Sierra Court,Suite D Project Number. Tosco(Unocal)SS#11195 Received: 515100 <br /> Dublin,CA 94568 Project Manager: Deanna Harding Reported: 5/22/00 <br /> W- 01ww&-19511 <br /> 00M� <br /> s <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Batch: 0050078 Date Prepared: 5/17100 Extraction Method: EPA 5030B FPM <br /> Blank 0050078-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 5/17/00 ND ug/l 50.0 <br /> Benzene itND 0.500 <br /> Toluene It <br /> ND 0.500 <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) ND 0.500 <br /> Methyl tert-butyl ether ND 5.00 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 9.70 70.0-130 97.0 <br /> LCS 0050078-BSI <br /> Benzene 5/17/00 10.4 6.34 ug/l 70.0-130 83.4 <br /> Toluene 't 10.0 7.65 70.0-130 76.5 <br /> Ethylbenzene 10.0 7.65 70.0-130 76.5 <br /> 30.0 23.1 70.0-130 77.0 <br /> 70.0-130 99.6 <br /> ;;;arrogate: a,a,a-Trlfluorotoluene <br /> LCS 0050078-BS2 <br /> Purgeable Hydrocarbons as Gasoline 5/17100 250 243 u9n 70.0-130 97.2 <br /> Surrogate. a,a,a-Trifluorotoluene to 10.0 8.79 70.0-130 87.9 <br /> Matrix Spike 0050078-MS1 L005052-03 <br /> Purgeable Hydrocarbons as Gasoline 5117/00 250 ND 210 ug/1 . 60.0-140 84.0 <br /> Surrogate: a,a,a-Trifluomtoluene " 10.0 10.1 70.0-130 101 <br /> Matrix Spike Dup 0050078-MSDI L005052-03 <br /> Purgeable Hy&ocarbons as Gasoline 5/17/00 250 ND 216 ug/l 60.0-140 86.4 25.0 2.82 <br /> Surrogate: a,a,a-Tris luorotoluene If 10.0 9.45 to 70.0-130 94.5 <br /> Batch: 0050085 Date Prepared: 5/18100 Extraction Method: EPA 5030E <br /> Blank 0050085-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 5118/00 ND t 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 tert-butyl ether ND 5.00 <br /> Surrogate. a,a,a-Difluorotoluene 10.0 9.95 " 70.0-130 99.5 <br /> LCS 0050085-BS 1 <br /> Benzene 5118100 10.0 7.92 ug/l 70.0-130 79.2 <br /> 10.0 7.37 70.0-130 73.7 <br /> Sequoia Analytical-San Carlos *Refer to end of reportfor text of notes and definitions. <br /> Page 8 of 13 <br />