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a <br /> `? Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 96W FAX(510)988 9673 <br /> Iwo Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 96W FAX(916)921 0100 <br /> 0 1 - <br /> EMCON Client Project ID Arca 2168, Stockton, CA Sampled Feb 18, 1998 <br /> 1433 N Market Blvd Sample Matrix Air Received Fein 18, 1998 <br /> Sacramento, CA 95834 Analysis Method EPA 5030/8020, DHS Luft Reported Mar 4, 1998 <br /> Attention Matt Turner First Sample # 802-0441 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample <br /> Analyte Units Results Results <br /> mg/m3 802-0441 802-0442 <br /> [-1 E-1 <br /> Purgeable 4,800 36 <br /> Hydrocarbons Reporting Limit 500 10 <br /> Benzene N D Oil <br /> Reporting Limit 25 0 050 <br /> Toluene 11 014 <br /> Reporting Limit 25 0050 <br /> Ethyl Benzene 17 0 063 <br /> • Reporting Limit 25 0 050 <br /> Total Xylenes 340 089 <br /> Reporting Limit 25 0 050 <br /> Chromatogram Weathered Weathered <br /> Pattern Gasoline Gasoline <br /> C7-C12 C6-C12 <br /> Quality Control Data <br /> Date Analyzed 02/20/98 02/20/98 <br /> Instrument Identification GCHP-1 GCHP-1 <br /> Surrogate Recovery, % 102 87 <br /> (GSC Limits = 60-140°/x) <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 /> 40 EQUOIA ANALYTICAL,_ELAAP #1 24 <br /> Ronald W Bobel <br /> Project Manager/Sacramento Laboratory <br /> 8020441 EMC t> <br />