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} <br /> j Sequoia680 Chesapeake Drive Redwood City CA 94063 (415) 3649600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> ! �I, Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> OEMCON Client Project ID ARCO 548 Stockton CA Sampled Aug 12, 1997 <br /> 1433 N Market Blvd Sample Matrix Water Received Aug 14 1997 <br /> Sacramento CA 95B34 Analysis Method EPA 5030/8020, DHS Luft Reported Aug 26, 1997 <br /> Attention Claudio Avila First Sample # 708-0493 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Sample Sample Sample Sample <br /> Analyte Units Results Results Results Results Results Results <br /> pg/L 708-0493 708-0494 708-0495 708-0496 708-0497 708-0498 <br /> MW-1 (55) MW-2(60) MW-3(52) MW-4(62) MW-5(60) MWS (59) <br /> Purgeable 110 52 N D N D 3,600 N D <br /> Hydrocarbons Reporting Limit 50 50 50 50 500 50 <br /> Benzene 70 N D N D N D 260 N D <br /> Reporting Limit 050 050 050 050 50 050 <br /> Toluene 075 N D N D N D 12 N D <br /> Deporting Limit 050 050 050 050 50 050 <br /> Ethyl Benzene 48 N D N D N D 260 N D <br /> Reporting Limit 050 050 050 050 50 050 <br /> Total Xylenes 96 N D N D N D 350 N D <br /> Reporting Limit 050 050 050 050 50 050 <br /> Chromatogram Gasoline Unidentified -- Gasoline - <br /> Pattern C6-C12 Hydrocarbons C6-C12 <br /> C6-C 12 <br /> Quality Control Data <br /> Date Analyzed 08/18/97 08/18/97 08/18/97 08/18/97 08/25/97 08/18/97 <br /> Instrument Identification GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-7 GCHP-2 <br /> Surrogate Recovery, % 95 92 101 97 99 97 <br /> (OC Limits = 60-140%) <br /> Purgeaole Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANAI_YT1 AL, ELAP #1624 <br /> Ainda:C Schneider <br /> Prolect Manager/Sacramento Laboratory <br /> J 7080493 EMC <1 <br />