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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 4600 FAX(650)3154 9233 <br /> 404 N Wiget lane Walnut Creek,CA 94598 (5 10) 988 9600 FAX(510)988-%73 <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/971121-G2 Sampled 11/21/97 <br /> 1580 Rogers Avenue Sample Descript EB Received 11/24/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 12/05/97 <br /> Attention Fran Thie Lab Number 971 i E94-06_ Reported 01 f 141 98 <br /> QC Batch Number GC120597STEX21A <br /> Instrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 0 50 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 79 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANA AL - ELAP #1210 <br /> Peggy Penner <br /> Project Manager Page 18 <br />