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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 4D 404 N eget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> 4cr Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921-0 100 <br /> i <br /> Blaine Tech Services Client Prol ID Shell Stockton/980129-S1 Sampled 01/29/98 <br /> 1680 Rogers Avenue Sample Descrlpt Foster Received 01/30/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method EPA 6260 Analyzed 02/09/98 <br /> Attention Fran Thie Lab Number 98011-184-04 Reported 02J12198 <br /> QC Batch Number MS020998MTBEF2A <br /> Instrument ID F2 <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 EtherDIPS) 20 N D <br /> Ethyl t-Butyl Ether 6BE) 20 N D <br /> t-Amyl Methyl Ether(TAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dlchloroethane-d4 76 114 110 <br /> Is <br /> Analytes reported as N D w of present above the stated limit of detection <br /> SEQUOIA CAL - ELAP #1210 <br /> gy Penner <br /> rolect Manager Page 10 <br />