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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wtset Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services Client Prol ID Chevron 9-2033/971117-M2 Sampled 11/17/97 <br /> 1680 Rogers Avenue Sample Descript MW-1 Received 11/20/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 12/01/97 <br /> Attention Fran Thie Lab Number 9711 C66-01 Reported 01/07/98 <br /> QC Batch Number GC120197BTEX03A <br /> Instrument ID GCHP03 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 1000 5000 <br /> Benzene 10 780 <br /> Toluene 10 N D <br /> Ethyl Benzene 10 180 <br /> Xylenes (Total) 10 150 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 94 <br /> 0 <br /> Analyses reported as N D not present above the stated limit of detection <br /> SEQUOI A I AL - ELAP #1210 <br /> \-.-T \—/ 7 <br /> Peggy Penner <br /> lbect Manager Page 4 <br />