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Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (5I0) 988 9600 FAX(510)988 9673 <br /> IWO Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (9t6) 921 9600 FAX(916)921 0100 <br /> WMCON Client Project ID ARCO 2168, Stockton, CA Samplers Aug 21, 1997 <br /> 1433 N Market Blvd Sample Matrix Water Received Aug 22, 1997 <br /> Sacramento CA 95834 Analysis Method EPA 5030/8020, DHS Luft Reported Sep 8, 1997 <br /> Attention Claudio Avila First Sample# 708-0913 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample <br /> Analyte Units Results <br /> ug/L 708-0913 <br /> MW-7(47) <br /> Purgeable 19,000 <br /> Hydrocarbons Reporting Umit 5,0W <br /> Benzene 1,100 <br /> Reporting Limit 50 <br /> Toluene 2,600 <br /> Reporting Vmt 50 <br /> Ethyl Benzene 490 <br /> Reporting Vmit 5o <br /> • Total Xylenes 2,000 <br /> Reporting omit 50 <br /> Chromatogram Gasoline <br /> Pattern C6-C12 <br /> Quality Control Data <br /> Date Analyzed 08/28/97 <br /> Instrument Identification GCHP-7 <br /> Surrogate Recovery, % 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 /> SEQU IA ANALYYTICA FLAP #16/24 <br /> /, <br /> / <br /> inda C Schneider <br /> Project Manager/Sacramento Laboratory <br /> 7080907 EMC <2> <br /> rte, <br />