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4D— Sequoia 680 Chesapeake breve Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (S TO) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 O1 o0 <br /> is <br /> Touchstone Developments Client Prod ID Chevron 9-4183 Sampled 04/10/96 <br /> 781 Kingston Ave Sample Descript P-2-6 0 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 9604798-04 Reported 04/12/96 <br /> QC Batch Number GC041196BTEXEXA <br /> Instrument ID GCHP06 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/K9 <br /> TPPH as Gas 10 N D <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 <br /> Toluene 00050N D <br /> Ethyl Benzene N D <br /> Xylenes (Total) 0 0050 N D <br /> Chromatogram Pattern 00050 N D <br /> Surrogates Control Limits % ° Recovery <br /> � Recov <br /> Trifluorotoluene 70 130 91 <br /> • <br /> analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> 0Follett <br /> t Manager Page 5 <br />