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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 /> Analytical 819 Stinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)92t OI00 <br /> is <br /> Touchstone Developments Client Prol ID Chevron 9-4183 /9-4183 Sampled 04/10/96 <br /> 781 Kingston Ave Sample Descript SP-3(A-D) Received 04/10/96 <br /> Oakland, CA 94611 Matrix SOLID Extracted 04/15/96 <br /> Analysis Method 8015Mod/8020 Analyzed 04/15/96 <br /> Attention Robert Mallory Lab Number 9604898-03 Reported 04J19196 <br /> OC Batch Number GC041596BTEXEXA <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 10 77 <br /> Methyl t-Butyl Ether 0 025 004 <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 0 01 <br /> Chromatogram Pattern <br /> Unidentified HC >C9 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 94 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br />* Follett <br /> ct Manager <br /> Page 4 <br />