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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (4 15) 364 9600 FAX(415) 364 9333 <br /> 1900 Sates Avenue,Suite L Concord, CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> Analytical 819 Striker Avenue Suotc 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategies Client Prol ID Unocal,s#6981 Sampled 09/22/94 <br /> 3035 Prospect Park Drive #80 Sample Descript Eff Received 09/23/94 <br /> Rancho Cordova, CA 95670 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 09/23/94 <br /> Attention Greg Gurist Lab Number 9409D48-01 Reported 09/27f94 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ppmv ppmv <br /> TPPH as Gas 38 N D <br /> Benzene 0 031 N D <br /> Toluene 0 027 0 037 <br /> Ethyl Benzene 0 023 N D <br /> Xylenes (Total) 0 023 0 023 <br /> Chromatogram pattern gas <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 105 <br /> Analytes reported as N D were not present above the stated Itmit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Podd Oli e <br /> Project Manager Page t <br />