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Sequoia 680 Chesapeake Redwood City, CA 94063 (650) 364- 00 FAX(650)364 9233 <br /> 41) Analytical <br /> 404 N Wigct Lanea Walnut Creek,CA 94598 (510) 988-96%00 FAX (510)988 9673 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services Client Proj ID Shell Stockton/971202-1-1 Sampled 12/02/97 <br /> 1680 Rogers Avenue Sample Descnpt MW-9 Received 12/03/97 <br /> San Jose, CA 95112 Matrix LIQUID <br />—z Analysls_Method =EP-A-8260 —Analyzed l2/09/97 <br /> Attention Fran Thie Lab Number 9712358-11 Reported-1 271 Q97 <br /> QC Batch Number MS120997MTBEF3A <br /> Instrument ID F3 <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 /> Dc-Isopropyl EtherPBE) <br /> PE) 20 N D <br /> Ethyl t-Butyl Ether 20 N D <br /> t-Amyl Methyl Ether (CAME) 20 N D <br /> Surrogates Control Limits % % Recovery <br /> 1,2-Dichloroethane-d4 76 114 96 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AN L AL - ELAP #1210 <br /> Peggy Penner <br /> Project Manager Page 31 <br /> - - --CID, - - - - <br />