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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> a- Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(t)16)921"0100 <br /> 1455 McDowell Bivd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> rClient Pro ID Shell 141 N El Dorado Sampled 04/22/98 <br /> Blaine Tech Services _- <br /> 1680 Rogers Avenue Sample Descript DUP Received 04/24/98 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 05/04/98 <br /> Attention Fran Thie - __ _ Lab Number_ 9804G89-12 -_ _ _ _ -Reported 05114198 = <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 .. .. 26 - -- - 240 <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 0 50 N D <br /> Xyienes (Total) <br /> Chromatogram Pattern <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 /> SEQUOI AL ICAL - EI_,4P #1210 <br /> Peggy Penner <br /> Project Manager Page <br />