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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 1 404 K Weget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> foll>7 Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)911 0100 <br /> Blame Tech Services Client Prof ID Chevron 9-4275/971125-51 Sampled 11/25/97 <br /> 1680 Rogers Avenue Sample Descript Muni #10 Received 11/26/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 12/09/97 <br /> Attention Fran Thie Lab Number 9711G20-01 Reported 12f 12f97 <br /> QC Batch Number GC120997BTEX18A <br /> Instrument ID GCHP18 <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 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 95 <br /> so <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AN ICAL - ELAP #1210 <br /> AEL <br /> My Penner <br /> Project Manager Page 3 <br />