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Sequoia 680 Chesapeake Dnve Redwood Cary CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 404 N Wcget Lane Walnut Creek,CA 94596 (510) 988 9600 FAX(510)988 9,673 <br /> �I Analytical a 19 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9603 FAX(916)921-0100 <br /> bN Client project Ib ARCO CO 2168, Stockton, CA Sampled [Mar 12, 1998 <br /> 1433 N Market Blvd Sample Matrix Air Received Mar 13, 1998 <br /> Sacramento, CA 95834 Analysis Method EPA 5030/8020, DHS Luft Reported Mar 25, 1998 <br />'Attention Matt Turner First Sample # 803-0576 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample <br /> Analyte Units Results Results <br /> ppmv 803-0576 803-0577 <br /> Influent Effluent <br /> Purgeable 46 N D <br /> Hydrocarbons Reporting Limit 28 2 8 <br /> Benzene N D N D <br /> Reporting Limit 0015 0016 <br /> Toluene 0 035 0 014 <br /> Reporting omit 0 013 0 013 <br /> Ethyl Benzene 0 048 N D <br /> INReporting Limit 0012 0012 <br /> a[Xylenes 046 0 021 <br /> Reporting Limit 0012 0012 <br /> Chromatogram Weathered <br /> Pattern Gasoline <br /> C6-C12 <br /> Quality Control Data <br /> Date Analyzed 03/13/98 03/13/98 <br /> Instrument Identification GCHP-7 GCHP-7 <br /> Surrogate Recovery, % 105 98 <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 /> SE UOIA ANALYTICAL, ELAP #16 4 <br /> L..� <br /> Ronald W Bobel <br /> Project Manager/Sacramento Laboratory <br /> 8030575 EMC <2> <br />