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Sequoia 819 Striker Avenue,Suite S <br /> Savamento,CA 95834 <br /> (916)921-9600 <br /> Analytical wFAX(916)92,1-0100 <br /> ww.sequofalabs.com <br /> 1T Corporation-Sacramento Project: Tosco 4409,Stockton,CA Sampled: 7120/00 to 7/21/00 <br /> 1433 N. Market Blvd.,Ste. 1 Project Number: N/A Received: 7/24/00 <br /> Sacramento,CA 95834 Project Man!ger: Mark Capps Reported: 8/9/00 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> LCS(continued) 0080049-BSI <br /> Methyl tert-butyl ether 8/3/00 0.200 0.216 mg/kg 70.0-130 108 <br /> Surrogate: a,a,a-Trifluorotoluene " 0.200 0.202 60.0-140 101 <br /> Matrix Spike 0080049-MSI S007267-07 <br /> Benzene 8/4/00 0.200 ND 0.178 mg/kg 60.0-140 89.0 <br /> Toluene 0.200 ND 0.201 60.0-140 101 <br /> Ethylbenzene 0.200 ND 0.202 60.0-140 101 <br /> Xylenes(total) 0.600 ND 0.565 60.0-140 94.2 <br /> Methyl tert-butyl ether 0.200 NO 0.168 60.0-140 84.0 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.206 60.0-140 103 <br /> Matrix Spike Dup 0080049-MSDI 5007267-07 <br /> Benzene 8/4/00 0.200 ND 0.182 mg/kg 60.0-140 91.0 25.0 2.22 <br /> *ne <br /> 0.200 NO 0.205 .160.0-140 102 25.0 0.985 <br /> benzene " 0.200 ND 0.206 It <br /> 60.0-140 103 25.0 1.96 <br /> Xylenes(total) 0.600 ND 0.577 60.0-140 96.2 25.0 2.10 <br /> Methyl tert-butyl ether 0.200 ND 0.174 60.0-140 87.0 25.0 3.51 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.206 60.0-140 103 <br /> Batch: 0080059 Date Prepared: 8/3/00 Extraction Method: EPA 5030E(MeOH) <br /> Blank 0080059-BLKI <br /> Purgeable Hydrocarbons 813100 NO ug/I 50.0 <br /> Benzene NO 0.500 <br /> Toluene NO 0.500 <br /> Ethylbenzene NO 0.500 <br /> Xylenes(total) NO 0.500 <br /> Methyl tert-butyl ether NO 2.50 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 10.2 60.0-140 102 <br /> LCS 0080059-BSI <br /> Benzene 8/3/00 10.0 10.7 ug/1 70.0-130 107 <br /> Toluene 10.0 10.4 70.0-130 104 <br /> Ethylbenzene 10.0 10.4 70.0-130 104 <br /> Xylenes(total) 30.0 31.4 70.0-130 105 <br /> Methyl tert-butyl ether 10.0 11.5 70.0-130 115 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 10.2 60.0-140 102 <br /> Matrix Spike 0080059-MSI S007288-02 <br /> Benzene 813/00 10.0 NO 11.2 ug/1 60.0-140 112 <br /> Toluene „ 10.0 NO 10.6 " 60.0-140 106 <br /> is benzene 10.0 ND 10.7 It 60.0-140 107 <br /> Sequoia Analytical-Sacramento "Refer to end of report for text of notes and definitions. <br /> Page 8 of 13 <br />