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Sequoia 680 Chesapcake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wsget Lane Walnut Creek CA 94596 (510) 988 9600 FAX (510)988 9673 <br /> �lll� Analytical 619 Striker Avenue Suitt 8 Sacramento,CA 95$34 (916) 921 9600 FAX (9 16)921 0100 <br /> Blame Tech Services Client Prof ID Chevron 9-4275/971125-S1 Sampled 11/25/97 <br /> 1680 Rogers Avenue Sample Descnpt MW-9 Received 11/26/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 12/09/97 <br /> Attention Fran Thie LabNumber 9711G19-09 Reported 12J12J97 <br /> QC Batch Number GC1 20997BTEX1 8A <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 91 <br /> Methyl t-Butyl Ether 25 1600 <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 /> Unidentified HC C6-C8 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 103 <br /> Analytes reported as D were not present above the stated I;mit of detection <br /> SEQU 1 A ALYTICAL - ELAP #1210 <br /> gy Penner <br /> Project Manager Page 27 <br />