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4D <br /> 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 /> X117 Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 Oioo <br /> s <br /> Touchstone Developments Client Prof ID Chevron 9-2033, 2033-2 Sampled 10/17/96 <br /> P O Box 2554 Sample Descript A11 Received 10/18/96 <br /> Santa Rosa, CA 95405 Matrix SOLID Extracted 10/21/96 <br /> Analysis Method 8015Mod/8020 Analyzed 10/21/96 <br /> Attention Jeff Monroe Lab Number 961OB27-07 Reported 10J22196 <br /> C Batch Number GC102196BTEXEXA <br /> rstrument ID GCHP07 <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 1 0 21 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 00074 <br /> Ethyl Benzene 00050 0 0056 <br /> Xylenes (Total <br /> } <br /> ChromatogramPattern 00050 0 021 <br /> Unidentified HC C8-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 90 <br /> i <br /> alytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP #1210 <br /> i Ilett <br /> oject Manager Page y 7 <br />