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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> �Ily Analytical 919 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Is <br /> Touchstone Developments Client Prol ID Chevron 9-4183 Sampled 04/10/96 <br /> 781 Kingston Ave Sample Descript T4-W-9 5 Received 04/10/96 <br /> Oakland, CA 94611 Matrix SOLID Extracted 04/11/96 <br /> Analysis Method 8015Mod/8020 Analyzed 04/11/96 <br /> Attention Robert Mallory Lab Number 9604798-02 Reported 04/12J96 <br /> OC Batch Number GC041196BTEXEXA <br /> Instrument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 300 780 <br /> Methyl t-Butyl Ether 75 N D <br /> Benzene 1 5 1 1 <br /> Toluene 15 12 <br /> Ethyl Benzene 1 5 47 <br /> Xylenes (Total) 15 30 <br /> Chromatogram Pattern <br /> Weathered Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 96 <br /> knalytes reported as N D were not present above the stated limit of detection <br /> 3E000IA ANALYTICAL - ELAP #1210 <br /> 2 <br /> Follett <br /> ct Manager <br /> Page 3 <br />