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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-97,33 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (9116)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Prol ID Shell 6131 Pacific Ave Sampled 02/24/99 <br /> 1680 Rogers Avenue Sample Descript MW-3 Received 02/25/99 <br /> San close, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/10/99 <br /> Attention Fran Thie T Y Lab-Number-9902D75-03 Reported 03J29199— <br /> QC Batch Number GC031099BTEX30A <br /> Instrument ID GCHP30 <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 5000 30000 <br /> Methyl t-Butyl Ether 250 1400 <br /> Benzene 50 4400 <br /> Toluene 50 5100 <br /> Ethyl Benzene 50 680 <br /> Xylenes (Total) 50 3600 <br /> Chromatogram Pattern C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 91 <br /> Analytes reported as N D were not present above the stated limit of detection <br />_ SEQUOIA ANALYTICAL - ELAP #1210 <br /> � a <br /> Project Manager Page 5 <br />