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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1900 Bates Avcnue,Surte L Concord,CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> war Analytical 819 Stnkcr Avenue Suuc 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br />*GeoStrategies Inc Client project ID Unocal #6981 Sampled ' Jan 9, 1995 <br /> 3035 Prospect Park Dr , Suite 80 Sample Matrix Air Received Jan 9, 1995 <br /> Rancho Cordova, CA 95670 Analysis Method EPA 5030/8015/8020 Reported Jan 19, 1995 <br /> Attention Greg Gurss First Sample # 501-0223 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> mg/m3 501-0223 501-0224 <br /> Int Eff <br /> Purgeabie <br /> Hydrocarbons 50 6,100 160 <br /> Benzene 0 050 99 083 <br /> t <br /> Toluene 0 050 640 15 <br /> Ethyl Benzene 0 050 120 57 <br /> Total Xylenes 0 050 560 29 <br /> Chromatogram Pattern Gasoline Gasoline <br /> C6-C12 C6-C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 200 10 <br /> Date Analyzed 1/10/95 1/10/95 <br /> Instrument Identification GCHP-2 GCHP-2 <br /> Surrogate Recovery, % 98 102 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL, FLAP #1624 <br /> Jennie Higgins <br /> Jes <br /> Project Manager <br /> 5010223 GSI <1> <br />