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Sequoia680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 8 t 9 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services Client Proi ID Shell Stockton/970402-F1 Sampled 04/02/97 <br /> 1680 Rogers Avenue Sample Descript MW-5 Received 04/03/97 <br /> San ,lose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 04/11/97 <br /> Attention Fran Thie Lab Number 9704278-07 Reported 04121/97 <br /> QC Batch Number GC041197BTEX01A <br /> Instrument 1D GCHP01 <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 25 280 <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 91 <br /> Analytes reported a D were not present above the stated limit of detection <br /> SE I ALYTICAL - ELAP #1210 <br /> P Penner <br /> Project Manager Page 14 <br />