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SeSequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX (650)364 9233 <br /> J 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9500 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services Client Proj ID Shell Stockton/971202-L1 Sampled 12/02/97 <br /> 1680 Rogers Avenue Sample Descrlpt MW-2 Received 12/03/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method EPA 8260 Analyzed 12/09/97 <br /> Attention Fran Thle Lab Number 9712358-04 Reported 12J19197 <br /> QC Batch Number MS120997MTBEH6A <br /> Instrument ID H6 <br /> Oxygenate Compounds (EPA 8260) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Ethanol 2500 N D <br /> t-Butanol 500 N D <br /> Methyl t-Butyl Ether (MTBE) 10 830 <br /> Di-Isopropyl Ether (DIPE) 10 N D <br /> Ethyl t-Butyl Ether (ETRE) 10 N D <br /> t-Amyl Methyl Ether (TAME) 10 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 109 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA I AL - ELAP #1210 <br /> Peggy Pen e <br /> Project Man ger Page 10 <br />