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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX equo la s.c o0 <br /> www.5equoialabs.com <br /> ATC Associates Inc.-Modesto Project: Stockton Smith Canal Sampled: 7/14/00 <br /> 1117 Lone Palm Ave.,Ste. B Project Number: 54.62574.0002 Received: 7/14/00 <br /> Modesto, CA 95351 Project Manager: Jeanne Homsey Reported: 7128/00 <br /> BTEX 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: 0070194 Date Prepared: 7119100 Extraction Method: EPA 5030B(MeOH) <br /> Blank 0070194-BLK I <br /> Benzene 7/19100 ND ug/l 0.500 <br /> Toluene ND 0.500 <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) ND 0.500 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 103 60.0-140 103 <br /> LCS 0070194-BSI <br /> Benzene 7/19/00 10.0 9.67 ug/l 70.0-130 96.7 <br /> Toluene 10.0 9.80 70.0-130 98.0 <br /> Ethylbenzene 10.0 10.4 70.0-130 104 <br /> Xylenes(total) 30.0 30.9 70.0-130 103 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 10.4 60.0-140 104 <br /> Spike 0070194-MSI 5007163-01 <br /> Benzene 7/19/00 10.0 ND I0.3 ug/l 60.0-140 103 <br /> Toluene 10.0 ND 10.3 60.0-140 103 <br /> Ethylbenzene 10,0 ND 10.7 60.0-140 107 <br /> Xylenes(total) 30.0 ND 32.1 60.0-140 107 _ <br /> Surrogate: a,a,a-Tris luorotoluene 10.0 9.67 60.0-140 96.7 <br /> Matrix Spike Dun 0070194-MSDI 8007I63-01 <br /> Benzene 7/19/00 10.0 ND 10A ug/l 60.0-140 101 25.0 1.96 <br /> Toluene " 10.0 ND 10.2 60.0.140 102 25.0 0.976 <br /> Ethylbenzene " 10.0 ND 10.7 60.0-140 107 25.0 0 <br /> Xylenes(total) 30.0 ND 32.1 60.0-140 107 25.0 0 _ <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 9.65 60.0-140 96.5 <br /> Sequoia Analytical -Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 5 of <br />