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4D <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (4t5) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical $i9Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Touchstone Developments Client Prol ID Chevron 9-2033, 2033-2 Sampled 10/17/96 <br /> P O Box 2554 Sample Descript A16 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 9610627-12 Reported 10/22196 <br /> iC Batch Number GC102196BTEXEXA <br /> istrument ID GCHP06 <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 34 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 0 010 <br /> Chromatogram Pattern <br /> Unidentified HC C9-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 85 <br /> • <br /> iaiytes reported as N D were not present above the stated limit of detection <br /> EQUOIA ANALYTICAL - EI_AP #1210 <br /> 2V Ilett <br /> rolect Manager Page 12 <br /> R0% <br />