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Sequoia 680 Chesapealce Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> e 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 %W FAX(5t0)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)92t 0100 <br /> 1i <br /> 5MCON Client Project ID ARCO 2168, Stockton, CA Sampled Nov 17, 1997 <br /> 1433 N Market Blvd Sample Matrix Water Received Nov 18, 1997 <br /> Sacramento, CA 95834 Analysis Method EPA 5030/8020, DHS Luft Reported Dec 4, 1997 <br /> Attention Deanna Santos First Sample # 711-0999 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample <br /> Analyte Units Results <br /> Ng/L 711-0999 <br /> MW-7(48) <br /> Purgeable 2,300 <br /> Hydrocarbons Reporting Limit 500 <br /> Benzene 120 <br /> Reporting Limit 50 <br /> Toluene 190 <br /> Reporting Limit 50 <br /> Ethyl Benzene 20 <br /> Reporting Limit 50 <br /> •Total Xylenes 100 <br /> Reporting Limit so <br /> Chromatogram Gasoline <br /> Pattern C6-C12 <br /> Quality Control Data <br /> Date Analyzed 11/25/97 <br /> Instrument Identification GCHP-7 <br /> Surrogate Recovery, % 110 <br /> (QC 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 /> EQU ANALYTICAL, P #1624 <br /> nda C Schneider <br /> roject Manager/Sacramento Laboratory <br /> ,Q� 7110993 EMC <2> <br />