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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> (D— 404 N Wlget Lane Walnut Creek CA 94598 (510)988-9640 FAX(510)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)92.1-9600 FAX(916)92.1-0100 <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 141 N EI Dorado Sampled 04/22/98 p <br /> 1680 Rogers Avenue Sample Descrlpt EB Received 04/24/98 ' <br /> San,dose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 05/04/98 " <br /> Attention Fran Thie Lab Number 98041389-13 _ _ Reported 05114J98 , <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 N D <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 93 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AL AL - ELAP #1210 <br /> 7 <br /> -- <br /> PV Pe r <br /> Project Manager Page 14 <br />