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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364 9133 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 %73 <br /> � <br /> 4D— <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 01 DO <br /> Blaine Tech Services Client Proj ID Shell Stockton/971202-L1 Sampled 12/02/97 <br /> 1680 Rogers Avenue Sample Descript MW-4 Received 12/03/97 <br /> i San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 12/15/97 <br /> Attention Fran Thie Lab Number 9712358-06 Reported 12119197 _ <br /> QC Batch Number GC121597BTEX21A <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 .. 25 540 <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 95 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA A CAL - ELAP #1210 <br /> eggy Pen r <br /> Project Manager Page 1& <br />