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1551 Industrial Road <br /> Sequoia ,was.CA 94070-4111 <br /> (650)Z32-9G00 <br /> FAX(650)Z32-961 Z <br /> www.seq <br /> r �, <br /> Analyticaluosalahs.com <br /> Gettler-11yen/Geostrategies(1) Project: Tosoo(2) Sampled: 11/13/00 <br /> 6747 Sierra Court,Suite J Project Number: Unocal SS#11195 Received: 11/13/00 <br /> Dublin,CA 94568 Project Manger Deanna HardingReported: 11/29/00 <br /> m <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> JAnalyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> LCs 0110116-BS2 <br /> Purgeable Hydrocarbons as Gasoline 11/22/00 250 225 ugll 70.0-130 90.0 <br /> Surrogate: a a,a-Trifluorotoluene " 10.0 9.62 70.0-130 96.2 <br /> LCS 0110116-13S3 <br /> Benzene 11/24/00 10.0 11.0 ug/1 70.0-130 110 <br /> Toluene IF 10.0 10.2 It <br /> 70.0-130 102 <br /> Ethylbenzene IF -10.0 10.2 It 70.0-130 102 <br /> Xylenes(total) IF <br /> 30.0 30.2 it 70.0-130 101 <br /> Surrogate: a,a,a-Trifluorotoluene It 10.0 10.5 to 70.0-130 105 <br /> LCS 0110116-BS4 <br /> Purgeable Hydrocarbons as Gasoline 11/24/00 250 229 ug/1 70.0-130 91.6 <br /> Surrogate. a,a,a-Trifluorotoluene 10.0 10.8 of 70.0-130 108 <br /> 14._ kxSpike 0110116-MS1 L011152-12 <br /> Benzene 11/22/00 10.0 ND 12.0 ug/1 60.0-140 120 <br /> Toluene " 10.0 ND 11.1 60.0-140 111 <br /> Ethylbenzene 11 10.0 ND 11.0 60.0-140 110 <br /> Xylenes(total) 0 30.0 ND 31.9 60.0-140 106 <br /> Surrogate: a,a,a-Trifluorotoluene of 10.0 10.8 " 70.0-130 108 <br /> Matrix Spike Dun 0110116-MSDI L011152-12 <br /> Benzene 11/22/00 10.0 ND 12.1 U94 60.0-140 121 25.0 0.830 <br /> Toluene " 10.0 ND 11.3 IF <br /> 60.0-140 113 25.0 1.79 <br /> Ethylbenzene " 10.0 ND 11.3 60.0-140 113 25.0 2.69 <br /> Xylenes(total) IF <br /> 30.0 ND 33.2 11 60.0-140 ill 25.0 . 4.61 <br /> Surrogate. a,a,a-Trifluorotoluene 10.0 9.53 " 70.0-130 95.3 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 16 of 19 <br />