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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404N W,get Cane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> trlll� Analytical 819 Strikcr Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Blaine Tech Services Client Proj ID Chevron 9-4275/971125-Si Sampled 11/25/97 <br /> 1680 Rogers Avenue Sample Descript MW-2 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 9711G19-02 Reported 12/12197 <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 2500 4600 <br /> Methyl t-Butyl Ether 125 N D <br /> Benzene 25 100 <br /> Toluene 25 N D <br /> Ethyl Benzene 25 330 <br /> Xylenes (Total) 25 130 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 99 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOI A A YTICAL - ELAP #1210 <br /> gy Penner <br /> Project Manager Page 6 <br />