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' Sequoia 690 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 1 404 N W.get Lane Walnut Crcek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (9t6)921 0100 <br />' Pacific Environmental Group Client Prol ID 311-174 1 A/5447,Stockton Sampled 02/04/98 <br /> 2025 Gateway Place, Suite 440 Sample Descript SW-20 Received 02/05/98 <br /> San Jose, CA 95110 Matrix SOLID Extracted 02/18/98 <br /> Analysis Method EPA 8260 Analyzed 02/18/98 <br /> Attention J_Nelligan Lab Number 9802975-04 Reported 02f20198 <br /> QC Batch Number MS021798MTBEEXA <br /> Instrument ID F3 <br />' Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/kg ug/k9 <br />' Ethanol 25000 <br /> ND <br /> t-Butanol 5000 N D <br /> Methyl t-Butyl Ether(MTBE) 100 2400 <br />' Di-Isopropyl Ether (DIPE) 100 N D <br /> Ethyl t-Butyl Ether (ETBE) 100 N D <br /> t-Amyl Methyl Ether(TAME) 100 N D <br />' Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 70 121 104 <br /> 1� <br /> 1 <br />' Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br /> AINk 3-.LAIM _ <br /> Granicher <br />' Protect Manager Page 8 <br />