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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (4 15) 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 Stnkcr Avenue Suae 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Touchstone Developments Client Prol ID Chevron 9-8264 / 9-8264 Sampled 02/09/96 <br /> 17170 Keaton Ave Sample Descript B-1-W Received 02/09/96 <br /> Sonoma, CA 95476 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/13/96 <br /> Attention Tim Walker Lab Number 9602708-20 Reported 02j23196 <br />)C Batch Number GCO21396BTEX21A <br /> nstrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 190 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Weathered Gas C10-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 91 <br />• <br /> I <br /> nalytes reported as N D were not present above the stated limit of detection <br />;E000IA ANALYTICAL - ELAP #1210 <br /> evin Follett <br />'iat Manager <br /> Page 20 <br />