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i <br /> a Sequoia 680 Chesapeake Dnve Redwood Ca CA <br /> tY, 94063 P (650) 364 9600 FAX 650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 92I 9600 FAX(916)921 0100 <br /> OMCON Tient Project ID Arco 2168 Stockton CA K <br /> 1 Sampled Feb 18, 1998 <br /> 1433 N Market Blvd Sample Matrix Air Received Feb 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 /> ppmv 802-0441 802-0442 <br /> M1 E-1 <br /> Purgeable 1176 90 <br /> Hydrocarbons Reporting Limit 28 28 <br /> Benzene N D 0 034 <br /> Reporting Limit 0016 0016 <br /> Toluene 30 0 037 <br /> Reporting Limit 0 013 0 013 <br /> Ethyl Benzene 40 0 014 <br /> Reporting Limit 0012 0012 <br /> Wotal Xylenes 78 021 <br /> Reporting Limit 0 012 0 012 <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 /> (QC Limits = 60-140%) <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 #16 <br /> Ronald W Bobel <br /> Project Manager/Sacramento Laboratory <br /> 8020441 EMC <2> <br />