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V, <br /> 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(510) 988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> EMCON Client Project ID Arco 548, Stockton, CA Sampled Feb 13, 1998 <br /> 1433 N Market Blvd Sample Matrix Sod Received Feb 13, 1998 <br /> Sacramento, CA 95834 Analysis Method EPA 5030/8020, DHS Luft Reported Feb 24, 1998 <br /> Attention Mark Capps First Sample # 802-0354 <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 /> mg/kg 802-0354 802-0355 802-0356 802-0357 802-0358 802-0359 <br /> PL 16 PL-17 D 1 D 2 D 3 D-4 <br /> (4 FT) (3 1/2 FT) (2 1/2 FT) (2 1/2 FT) (2 1/2 FT) (2 1/2 FT) <br /> a <br /> Purgeable N D 19 64 N D N D N D <br /> Hydrocarbons Reporting Limit 1 0 1 0 1 0 1 0 1 0 1 0 <br /> Benzene N D N D 00058 N D N D N D <br /> Reporting Limit 00050 00050 00050 00050 00050 00050 <br /> Toluene N D 0 036 0 012 N D N D N D <br /> Reporting Limit 00050 00050 00050 00050 00050 00050 <br /> Ethyl Benzene N D 0 014 N D N D N D N D <br /> isReporting Lima 00050 00050 00050 00050 00050 00050 <br /> Total Xylenes N D 010 0 020 N D N D N D <br /> Reporting Limit 00050 00050 00050 00050 00050 00050 <br /> Chromatogram - Weathered Weathered - - <br /> Pattern Gasoline Gasoline <br /> C6 C12 C6 C12 <br /> Quality Control Data <br /> Date Analyzed 02/17/98 02/18/98 02/17/98 02/17/98 02/17/98 02/17/98 <br /> Instrument Identification GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Surrogate Recovery, % 103 102 100 102 100 101 <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 /> UOIA ANALYTICAL``, ELLAP #1624 <br /> 7,/./—-e-71 ---, <br /> Ronald W Bobel <br /> Project Manager/Sacramento Laboratory <br /> 8020348 EMC <2:> <br />