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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wtget 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 9-8264 /9-8264 Sampled 02/06/96 <br /> 17170 Keaton Ave Sample Descript B-2-5 0 Received 02/09/96 <br /> Sonoma, CA 95476 Matrix SOLID Extracted 02/13/96 <br /> Analysis Method 8015Mod/8020 Analyzed 02/14/96 <br /> Attention Tim Walker -Lab Number 9602708-07 Reported 02/23196 <br /> PC Batch Number GCO21396BTEXEXB <br /> lstrument 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 1 0 N D <br /> Methyl t-Butyl Ether 0 025 023 <br /> Benzene 00050 020 <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 0 038 <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 108 <br /> i <br /> ialytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> even Follett <br /> ro Manager Page 7 <br />