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` 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wlget 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 />-,u`arrrrt—sags-x•sn___m-n—rr rx s»...»..»......».»..ss.».....�......i rr»nr.............»».........�.....r........s......... ...» ..» .r..s::= —_____ ___ ......r.................».,___ ""'_ <br /> Gettler Ryan/Geostrategies Client Prof iD Unocal SS#5417, 180179 85 - Sampled 11/23/98 <br /> 6747 Sierra Court Suite J Sample Descript MW-3 Received 11/23/98 <br /> » <br /> I Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 11/30/98 i <br />' Attention Deanna Harding » Lab Number_ 9811A00-04 Reported 12J17/98 <br /> QC Batch Number MS113098MTBEH6A <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 500 N D <br /> t-Butanol 100 N D <br /> Methyl t-Butyl Ether (MTBE) 20 N D <br /> Di-Isopropyl Ether (DIPS) 20 N D <br /> Ethyl t-Butyl Ether (ETBE) 20 N D <br /> t-Amyl Methyl Ether (TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichlorcethane-d4 76 114 104 <br /> r <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> i <br /> i <br /> G er <br /> I <br /> ect Manager Page 6 <br />