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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 /> Analytical 819 Sinker Avenue,Suite 8 Sacrarrnento,CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Blaine Tech Services Client Prod ID Chevron 9-4275/971125-S1 Sampled 11/25/97 <br /> 1680 Rogers Avenue Sample Descnpt MW-1 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 9711G19-01 Reported 12J1 2J97 <br /> QC Batch Number GC1 20997BTEX1 8A <br /> Instrument ID GCHP18 <br /> Total Purgeablle Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 500 1100 <br /> Methyl t-Butyl Ether 25 67 <br /> Benzene 5 0 6 5 <br /> Toluene 50 N D <br /> Ethyl Benzene 5 0 33 <br /> Xylenes (Total) 5 0 18 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 112 <br /> • <br /> Analytes reported a N D were not present above the stated limit of detection <br /> SEQU I A AL"CAL - ELAP #1210 <br /> Wey Penner <br /> ct Manager Page 3 <br />