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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364.9233 <br /> ■ ] 1 404 N.Wiget Lane Walnut Creek,CA 94598 '(510) 988-9600 FAX(510)988.9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> L <br /> Cott <br /> LAdvanced GeoEnvironmental Project: Stockton Fire#3 Sampled: 7/27/98 <br /> 4005 North Wilson Way Project Number: N/A Received: 7/28/98 <br /> Stockton,CA 95205 Project Manager: Bill Little Reported: 8/11,8/12/98 <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: 8080053 Date Prepared: 814/98 Extraction Method: EPA 5030B( /�jT <br /> Blank 8080053-BLKl <br /> Purgeable Hydrocarbons 8/4/98 ND ug/1 50.0 <br /> LBenzene " ND 0.500 <br /> Toluene ND 0.500 <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) ND 0.500 <br /> Methyl tert-butyl ether ND 5.00 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 8.77 60.0-140 87.7 <br /> LAS 8080053-BSI <br /> Benzene 8/4/98 10.0 9.79 ug/I 70.0-130 97.9 " <br /> Toluene 10.0 9.25 70.0-130 92.5 <br /> Ethylbenzene 10.0 9.11 70.0-130 91.1 <br /> eZl <br /> enes(total) 30.0 27.2 70.0-130 90.7 <br /> tert-butyl ether 10.0 9.71 70.0-130 97.1 <br /> Surrogate: a,a,a-Trifluoro toluene 10.0 8.82 60.0-140 88.2 <br /> Matrix Spike 8080053-MSI 5807325-09 <br /> Benzene 8/4/98 10.0 2.80 12.4 ug/l 60.0-140 96.0 <br /> Toluene 10.0 ND 9.23 60.0-140 92.3 <br /> LEthylbenzene 10.0 ND 9.38 60.0-140 93.8 <br /> Xylenes(total) 30.0 ND 27.9 60.0-140 93.0 <br /> Methyl tert-butyl ether 10.0 78.5 82.5 60.0-140 40.0 2 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 9.00 60.0-140 90.0 <br /> LMatrix Spike Dun 8080053-MSDI S807325-09 <br /> Benzene 8/4/98 10.0 2.80 11.8 ug/I 60.0-140 90.0 25.0 6.45 <br /> Toluene 10.0 ND 8.73 60,0-140 87.3 25.0 5.57 <br /> Ethylbenzene " 10.0 ND 8.82 60,0-140 88.2 25.0 6.15 <br /> Xylenes(total) 30.0 ND 26.3 60.0-140 87.7 25.0 5.87 <br /> Methyl tert-butyl ether 10.0 78.5 83.4- 60,0-140 49.0 25.0 20.2 2 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 7.71 60.0-140 77.1 <br /> ' "• '• {` a ..4ti <br /> t <br /> Sequoia alytical-Sacramento Refer to egad of report for text of notes and definitions. <br /> LRonald W Bobel,Client Services Representative Page 4 of 6 <br />