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5 <br /> 41� Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(5 10)988-%73 <br /> 1W Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EMCON Client Project ID ARCO 2130, Stockton, CA Sampled Aug8, 1997 <br /> p 9 <br /> 1433 N Market Blvd Sample Matrix Water Received Aug 20, 1997 <br /> Sacramento, CA 95834 Analysis Method EPA 5030/8020, DHS Luft Reported Sep 4, 1997 <br /> Attention Claudio Avila First Sample # 708-0790 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Sample <br /> Analyte Units Results Results Results <br /> jig/L 708-0790 708-0792 708-0793 <br /> MW-4 (73) MW-6 (72) MW-7 (72) <br /> Purgeable N D 190 N D <br /> Hydrocarbons Reporting Limit 50 50 50 <br /> Benzene N D N D N D <br /> Reporting Limit 050 050 05G <br /> Toluene N D N D N D <br /> Reporting Limit 050 050 050 <br /> Ethyl Benzene N D N D N D <br /> Reporting Limit 050 050 050 <br /> Total Xylenes N D N D N D <br /> Reporting Limit 050 050 050 <br /> Chromatogram - -- <br /> Pattern -Pattern <br /> Quality Control Data <br /> Date Analyzed 08/27/97 08/27/97 08/27/97 <br /> Instrument Identification GCHP-2 GCHP-2 GCHP-2 <br /> Surrogate Recovery, % 89 89 95 <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 /> Report amended October 1 1997 <br /> SEQUOIA ANALYTICAL ELAP #1624 <br /> L nda C Schneider <br /> /'Orolect Manager/Sacramento Laboratory <br /> ' 7080787EMC <2> <br />