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Sequoia 680 Chesapeake Drive 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 %00 FAX(916)921 0100 <br /> Blaine Tech Services Client Proj ID Shell Stockton/971202-L1 Sampled 12/02/97 <br /> 1680 Rogers Avenue Sample Descript RW-1A Received 12/03/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method—EP_A 8260 Analyzed 12/09/97—, <br /> Attention Fran Thie Lab Number 9712358-03 - Reported 12119197 <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 500000 N D <br /> t-Butanol 100000 N D <br /> Methyl t-Butyl Ether (MTBE) 2000 180000 <br /> Di-Isopropyl EtherPBE) <br /> PS) 2000 N D <br /> Butyl <br /> Ethyl t- Ether 2000 N D <br /> t-Amyl Methyl Ether (TAME) 2000 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 102 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOI N MCA - ELAP #1210 0 <br /> Peggy Pe <br /> Project Manager Page 7 <br />