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41� <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(S 10)988 9673 <br /> WOAnalytical 819 Striker Avenue Suite s Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> 0 <br /> Touchstone Developments Client Prol ID Chevron 9-2033, 2033-2 Sampled 10/17/96 <br /> P O Box 2554 Sample Descript A5 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 961OB27-01 Reported 10122196 <br />,C Batch Number GC102196BTEXEXA <br /> istrument ID GCHP22 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/K9 mg/K9 <br /> TPPH as Gas 1 0 36 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 00051 <br /> Xylenes (Total) 00050 0 013 <br /> Chromatogram Pattern <br /> Unidentified HC C9-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 109 <br /> lalytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - ELAP #1210 <br />,vi Ilett <br /> oject Manager Page 1 <br />