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Sequoia 819 Sulker Avenue, 8 <br /> 958 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical wFAX(916)9abs.co 0 <br /> ww.sequoiaiabs.com <br /> IT Corporation-Sacramento Project: Tosco 4409, Stockton,CA Sampled: 7/20/00 to 7/21/00 <br /> 1433 N. Market Blvd.,Ste. 1 Project Number: NIA Received: 7/24100 <br /> Sacramento,CA 95834 Pro ect Manager: 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 /> Analyte Analyzed level Result Result Units Recov,Limits % Limit % Notes* <br /> Batch: 0080002 Date Prepared: 8/2/00 Extraction Method: EPA 5030B MeO <br /> Blank 0080002-BLKI <br /> Purgeable Hydrocarbons 8/2/00 ND ug/l 50.0 <br /> Benzene 1. ND 0.500 <br /> Toluene ND 0.500 <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) PoND 0.500 <br /> Methyl tent-butyl ether ND 2.50 <br /> Surrogate: a,a a-Trifluorotoluene 10.0 9.57 60.0-140 95.7 <br /> LCS 0080002-BSI <br /> Benzene 8/2/00 10.0 10.1 ug/I 70.0-130 101 <br /> Toluene 10.0 9.77 70.0-130 97.7 <br /> EtLibenzene 10.0 9.69 70.0-130 969 <br /> Ms(total) 30.0 29.6 " 70.0-130 98.7 <br /> tyl tert-butyl ether 10.0 10.9' 70,0-130 109 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 9.79 60.0-140 97.9 <br /> Matrix Spike 0080002-MSI 5007261-01 <br /> Benzene 812100 10.0 ND 10.2 ug/l 60.0-140 102 <br /> Toluene 10.0 ND 9.96 60.0-140 99.6 <br /> Ethylbenzene 10.0 ND 9.78 60.0-140 97.8 <br /> Xylenes(total) 30.0 ND 29.5 60.0-140 98.3 <br /> Methyl tert-butyl ether 10.0 ND 11.2 60.0-140 112 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 9.96 60.0-140 99.6 <br /> Matrix S ike Dun 0080002-MSDI 5007261-01 <br /> Benzene 8/2/00 10.0 ND 9.84 ug/I 60.0-140 98.4 25.0 3.59 <br /> Toluene 10.0 ND 10.0 60.0-140 100 25.0 0.401 <br /> Ethylbenzene 10.0 ND 9.78 60.0-140 97.8 25.0 0 <br /> Xylenes(total) 30.0 ND 29.5 60.0-140 98.3 25.0 0 <br /> Methyl tert-butyl ether. 10.0 ND 11.1 60.0-140 111 25.0 0.897 <br /> Surrogate: a,a,a-Triuorotoluene 10.0 9.08 60.0-140 90.8 <br /> Batch: 0080047 Date Prepared: 8/21{)0 Extraction Method: EPA 5030B(MeOH) <br /> Blank 0080047-BLKI <br /> Purgeable Hydrocarbons 8/2/00 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene " ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xes(total) ND 0.00500 <br /> 1 tert-butyl ether ND 0.0500 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 6 of 13 <br />