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1551 Industrial <br /> Sequoia San Carlos,CA 94070-111 d? <br /> (650)232-9600 <br /> FAX(650)232-9612 <br /> Analytical www.sequoWabs.com <br /> wo- <br /> tWer-Ryan/Geostrategies Project: Tosco Sampled: 4/10/00 <br /> 747 Siam Court,Suite D Project Number. Unocal SS#4409 Received. 4/10/00 <br /> ublin,CA 94568 Project Manager Deanna Harding Reported: 4/24/00 <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br />!!&"e AnEUEq Level Result Result Units Recov.Limits % Limit % Notes* <br /> atch: 0040088 Date Prepared: 4118100 Extraction Method: EPA 5030B frM <br /> lank 0040088-BLK1 <br /> w3eable Hydrocarbons as Gasoline 4118/00 ND ug/I 50.0 <br /> enzene ND 0.500 <br /> oluene O-W <br /> thylbenme ND OSGO <br /> ylenes(total) 0.500 <br />[ethyl tert-butyl.ether 14D w 5.00 <br /> 4yrogale. aaa-Trisuorotoluene 10.0 10.5 N 70.0-130 105 <br /> CS 0040088-BSI <br /> enzene 4/18/00 10.0 9.52 ug/l 70.0-130 95.2 <br /> oluene 10.0 9.31 70.0-130 93.1 <br /> thylbenzene 10.0 9.39 70.0-130 93.9 <br /> ylcnes(total) 30.0 27.8 70.0-130 92.7 <br /> irrogare. aaa-Trifluororoluene 10.0 10.6 70.0-130 106 <br /> CS 0040098-BS2 <br /> iTgeable Hydrocarbons as Gasoline 4/18/00 250 214 U911 70.0-130 85.6 <br /> jrmgate: aaa-Trifluorotoluene 0 10.0 9.70 70.0-130 97.0 <br /> Intrtx Spike 0040088-MSI L004096-03 <br /> enzene 4/18/00 10.0 ND 9.67 ug/l 60-0-140 %.7 <br /> oluene 10.0 ND 9.32 60.0-140 93.2 <br /> thylbertme n 10.0 ND 9.61 60.0-140 96.1 <br /> ylenes(total) 30.0 ND 27.6 60.0-140 92.0 <br /> wmate., a.aa-Tilfluorvtoluene 10.0 9.50 70.0-130 95.0 <br /> latrix Spike Dao 0040089-MSD1 L004096-03 <br /> enzene 4/18/00 10.0 ND 10.5 U94 60.0-140 105 25.0 8.23 <br /> oluene 10.0 ND 10.3 60.0-140 103 25.0 9.99 <br /> ffiy1ben;=e: 10.0 ND 10.2 60.0-140 102 25.0 5.% <br /> ylenes(total) 30.0 ND 30.6 60.0-140 102 25:0 10.3 <br /> trmgate. aaaa-rrifluorotoluene 10.0 9.11 70.0-130 91.1 <br /> itch: 0040089 Date Prepared: 4118100 Extraction Method: EPA 59308 IPM <br /> lank--- 0040089-BLKI---- <br /> Irgeable Hydrocarbons as Gasoline 4/18/00 ND ug/l 50.0 <br /> Mame ND - OSOO <br />)Iuenc ND - 0.500 <br /> hylbenme ND 0.500 <br /> ylenes(tow) ND 0.500 <br /> Ruoia Analytical-San Carlos *Refer to end ofreportfor Aw of notes and deftnifions. <br /> Page 7 of 1 I <br />