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680 Chesapeake iv <br /> Sequoia P c Dr c Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 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 /> Pacific Environmental Group- Client Proj ID 311-174 1A/BP #5447,Stockton Sampled 02/13/98 <br />' 2025 Gateway Place, Suite 440 Sample Descript PD-5 Received 02/17/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/20/98 <br /> Attention Joe Muzzio <br /> Analysis Method EPA 8260 Analyzed 02/20/98 <br />' _ Lab Number 9802B86-05 _ <br /> QC Batch Number MS021998MTBEEXB Reported 03j30198 <br /> Instrument ID H6 <br /> 1 Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br />' ug/kg ug/kg <br /> Ethanol 25000 <br /> t-Butanol N D <br /> Methyl t-Butyl Ether(MTBE) 5000' N D Di-Isopropyl Ether (DIPS) X00 -100 250 <br /> Ethyl t-Butyl Ether (ETBE) N D <br /> t-Amyl Methyl Ether (TAME) 100 N D <br /> 100 N D <br />' Surrogates Control Limits% % Recovery <br /> 1 2-Dichloroethane-d4 70 121 Recovery <br /> 1 03 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> rf SEQUOIA ANALYTICAL - ELAP 41210 <br /> od Granicher <br /> Project Manager Page 5 <br />