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Ci) Sequoia 680 Chesapeake Drive Redwood City Ca 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(5 t0)988 9673 <br /> IIIA Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> EMCON Client Project ID IBC-Stockton Y Sampled Feb 11, 1998 <br /> 1433 N Market Blvd Sample Matrix Water Received Feb 11, 1998 <br /> Sacramento, CA 95834 Analysis Method EPA 5030/8020, DHS Luft Reported Mar 4, 1998 <br /> Attention Deanna Santos First Sample # 802-0277 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit ID ID <br /> pg/L 802-0277 802-0278 <br /> MW 1 Mw-2 <br /> Purgeable <br /> Hydrocarbons 50 1,600 69 <br /> Benzene 050 130 28 <br /> Toluene 050 11 N D <br /> Ethyl Benzene 050 20 11 <br /> Total Xylenes 0 50 260 055 <br /> Chromatogram Pattern Weathered Weathered <br /> Gasoline Gasoline <br /> 139-1312 C6-C10 <br /> Quality Control Data <br /> Reporting Limit <br /> Multiplication Factor 20 10 <br /> Date Analyzed 02/18/98 02/17/98 <br /> Instrument Identification GCHP-2 GCHP-2 <br /> Surrogate Recovery, % 108 91 <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 r 4 L T <br /> S OIA ANALYTICAL, FLAP #1624 , MAR 2 <br /> Lin <br /> i <br /> Ronald W Bobel <br /> Project Manager/Sacramento Laboratory <br /> 8020277 EMC <1> <br />