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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 /> Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> Touchstone Developments Client Prof ID Chevron 9-2033, 2033-2 Sampled 10/09/96 <br /> P O Box 2554 Sample Descript A3 Received 10/10/96 <br /> Santa Rosa, CA 95405 Matrix SOLID Extracted 10/11/96 <br /> Analysis Method 8015Mod/8020 Analyzed 10/11/96 <br /> Attention Jeff Monroe Lab Number 9610612-03 Reported 10J14J96 <br />)C Batch Number GC1 01 196BTEXEXA <br /> istrument ID GCHP07 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg m9/K9 <br /> TPPH as Gas 10 30 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 0 016 <br /> Ethyl Benzene 00050 0 020 <br /> Xylenes (Total) 00050 0 026 <br /> Chromatogram Pattern <br /> Unidentified HC C8-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 103 <br /> nalytes reported as N D were not present above the stated limit of detection <br />;EQUOIA ANALYTICAL - ELAP #1210 <br /> e Ilett <br /> rolect Manager Page 3 <br /> r�i <br />