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Sequoia 680 Chesapeake Drive Redwood Gay CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 %00 FAX (510)988 9673 <br /> 4-5) <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> 0 <br /> Touchstone Developments Client Prot ID Chevron 9-4183 Sampled 04/10/96 <br /> 781 Kingston Ave Sample Descript T4-E-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 9604798-01 Reported 04112/96 <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 /> m9/Kg mg/Kg <br /> TPPH as Gas 400 <br /> Methyl t-Butyl Ether 10 660N D <br /> Benzene <br /> Toluene 2 0 27 <br /> Ethyl Benzene 2 0 17 <br /> Xylenes (Total) 2 0 60 <br /> Chromatogram Pattern 2 0 37 <br /> Weathered Gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 ry <br /> 97 <br /> malytes reported as N D were not present above the stated limit of detection <br /> iEOUOIA ANALYTICAL - ELAP #1210 <br /> 0 Follett <br /> t Manager Page 2 <br />