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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650►364-9733 <br /> ` Sequoia 404 N Wiget[ane Walnut Creek CA 94598 (925)9$8-9600 FAX(925)988_9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-0100 <br /> %07 Analytical 1555 McDowelldRoad North Step SanalCarrl CA 94070 41 1 1 (650)232-ma CA 94954 (707)792 9600 FAX(650)232-96 865 FAX(707) 2 <br /> Secor Client Pro'ect ID Arco # 4932, Stockton Sampled May 26 1 <br /> p y 999 <br /> 9912 Business Park Dr Ste 100 Sample Descrlpt Soil, T2N@15' Received May 27, 1999 <br /> Sacramento , CA 95827 Analysis Method EPA 8260 Analyzed Jun 9, 1999 <br /> Attention Rusty Benkosky Lab Number 906-0253 Reported Jun 28, 1999 <br /> QC Batch Number SPD604998260EXA <br /> Instrument Id GG/MS-2 <br /> OXYGENATED COMPOUNDS (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> t-Butanol 10 N D <br /> Methyl t-Butyl Ether (MTBE) 020 77 <br /> DI-Isopropyl Ether-(DIPS) 020 N D <br /> Ethyl t-Butyl Ether (ETBE) 020 N D <br /> t-Amyl Methyl Ether(TAME) 020 N D <br /> 1,2-Dichloroethane 020 N D <br /> Surrogates Control Limit% % Recovery <br /> Dlbromofluoromethane 50 150 92 <br /> 1,2-Dichloroethane-d4 50 150 92 • <br /> Analytes reported as N D were not present above the stated limit of detection Because matrix effects and/or other factors <br /> required additional sample dilution,detection limits for this sample have been raised <br /> SEQUOIA ANALYTICAL, #1271 <br /> D4imp <br /> Project Manager <br /> 9060251 SSS <4> <br />