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Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> 404N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 %73 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services Client Prol ID Shell Stockton/971202-1-1 Sampled 12/02/97 <br /> 1680 Rogers Avenue Sample Descrlpt DUP Received 12/03/97 <br /> San Jose, CA 95112 Matrix LIQUID <br />�- Analysis Method 8015Mod/8020 Analyzed 12/15/97 <br /> Attention Fran Thle Lab Number 9712360-15 Reported 12/19f97 <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 50000 54000 <br /> Methyl t-Butyl Ether ... 2500 180000 <br /> Benzene ... 500 6300 <br /> Toluene 500 6800 <br /> Ethyl Benzene 500 1500 <br /> Xylenes (Total) 500 8400 <br /> Chromatogram Pattern C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 113 <br /> 10 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AN ICAL - ELAP #1210 <br /> Ocggy Pen r <br /> Project Manager Page 12 <br />