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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-92,33 <br /> Sequoia 404 N Wlget lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-Oioo <br /> Analytical - 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Prod ID Shell 6131 Pacific Ave Sampled 02/24/99 <br /> 1680 Rogers Avenue Sample Descript MW-4 Received 02/25/99 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/10/99 <br /> Attention -Fran Thie Lab Number-9902D75-04 -- - --Repo rted-03f29f99—, <br /> QC Batch Number GCO31099BTEX03A <br /> Instrument ID GCHP03 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE------- <br /> Analyte <br /> TBE -- -- <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 10000 49000 <br /> Methyl t-Butyl Ether 500 1300 <br /> Benzene 100 12000 <br /> Toluene 100 8000 <br /> Ethyl Benzene 100 990 <br /> Xylenes (Total) 100 2800 <br /> Chromatogram Pattern C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> Tnfluorotoluene 70 130 90 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br />-- r <br /> i <br /> Project Manager Page 7 <br />