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6aWpeake Drive Redwood City,CA 940 (650)364-9600 FAX(650)364-9233 <br /> Sequoia <br /> .'VP1 404 N.Wiget lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd.North.Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettler-Ryan-Sac Project: Tosco 11193,Stockton,CA Sampled: 12/29/98 <br /> 3164 Gold Camp Dr.,Ste.240 Project Number: 140205.03 Received: 12/29/98 <br /> Rancho Cordova,CA 95670 Project Manager: Todd Del Frate Reported: 1/6/99 <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: 9010047 Date Prepared: 1/5/99 Extraction Method: EPA 5030B(MeOH) <br /> Blank 9010047-BLKI <br /> Purgeable Hydrocarbons 1/5/99 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xvlenes(total) ND 0.00500 <br /> Methyl tert-butyl ether ND 0.0500 <br /> Surrogate: a,a,a-Trifluorotoluene " 0.200 0.190 " 60.0-140 95.0 <br /> LES 9010047-BSI <br /> Benzene 1/5/99 0.200 0.196 mg/kg 70.0-130 9S.0 <br /> Toluene " 0.200 0.198 70.0-130 99.0 <br /> Ethylbenzene 0.200 0.200 70.0-130 100 <br /> Xylenes(total) 0.600 0.586 70.0-130 97.7 <br /> Methyl tert-butyl ether 0.200 0.179 70.0-130 59.5 <br /> Surrogate: a,a,a-Tris luorotoluene " 0.200 0.187 60.0-140 93.5 <br /> Matrix Spike 9010047-MSI S901008-09 <br /> Benzene 1/5/99 0.200 ND 0.161 mg/kg 60.0-140 80.5 <br /> Toluene 0.200 ND 0.167 1. 60.0-140 83.5 <br /> Ethylbenzene 0.200 ND 0.167 " 60.0-140 83.5 <br /> Xylenes(total) 0.600 ND 0.501 " 60.0-140 83.5 <br /> Methyl tert-butyl ether 0.200 ND 0.154 '° 60.0-140 77.0 <br /> Surrogate: a,a,a-Trifluorotoluene " 0.200 0.182 1160.0-140 91.0 <br /> Matrix SpikeDuo 9010047-MSD1 5901008-09 <br /> Benzene 1/5/99 0.200 ND 0.163 mg/kg 60.0-140 81.5 25.0 1.23 <br /> Toluene 0.200 ND 0.161 " 60.0-140 80.5 25.0 3.66 <br /> Ethylbenzene 0.200 ND 0.168 " 60.0-140 84.0 25.0 0.597 <br /> Xylenes(total) 0.600 ND 0.502 " 60.0-140 83.7 25.0 0.239 <br /> Methyl tert-butyl ether 0.200 ND 0.160 " 60.0-140 80.0 25.0 3.82 <br /> Surrogate: a,a,a-Trifluorotoluene " 0.200 0.177 " 60.0-140 88.5 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Sandra R. Hanson,Client Services Representative Page 3 of 4 <br />