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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX`415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX 15 0 988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (9t6) 921 9600 FAX (916)921 0100 <br /> Blaine Tech Services Client Prol ID Shell Stockton/970401-F2 Sampled 04/02/97 <br /> 1680 Rogers Avenue Sample Descript RW-1A Received 04/03/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 04/11/97 <br /> Attention Fran Thie Lab Number 9704289-08 Reported 04J15197 <br /> QC Batch Number GC041197BTEX17A <br /> Instrument 1D GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L u9/L <br /> TPPH as Gas 125000 140000 <br /> Methyl t-Butyl Ether 6250 440000 <br /> Benzene 1250 14000 <br /> Toluene 1250 22000 <br /> Ethyl Benzene 1250 3300 <br /> Xylenes (Total) 1250 19000 <br /> Chromatogram Pattern C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 115 <br /> i <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA NA CAL - ELAP #1210 <br /> jgy Pen r <br /> ect Manager Page 8 <br />