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■ ' SequoiaJ 680 Chesapeake Drive Redwood City CA 94o63 (415) 364 9600 FAX(415)364 9333 <br /> 404 N VfrLane ne Walnut Geek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 5aemmento CA 95834 (916) 921 9600 FAX(916)921 oloo <br /> *Brown&Caldwell Client Project ID Arco 05450, Stockton, CA Sampled Mar 19, 1997 <br /> 9616 Micron Ave, Suite 600 Sample Matrix Water Received Mar 20, 1997 <br /> Sacramento, CA 95827 Analysis Method EPA 5030/8020, DHS Luft Reported Apr 1, 1997 <br /> Attention Steve Misner First Sample# 703-0652 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample <br /> Analyte Units Results <br /> erg/L 703-0652 <br /> Mw-1 <br /> Purgeable N D <br /> Hydrocarbons Reporting Limit 5o <br /> Benzene N D <br /> Reporting Limit 050 <br /> Toluene N D <br /> Reporting Limit 050 <br /> Ethyl Benzene N D <br /> Reporting Limit 050 <br /> Total Xylenes N D <br /> Reporting Limit 050 <br /> Chromatogram -- <br /> Pattern <br /> Quality Control Data <br /> Date Analyzed 03/24/97 <br /> Instrument Identification GCHP-2 <br /> Surrogate Recovery, % 92 <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 repotting limit <br /> SEQUOIA ANALYTICAL, ELAP #1624 <br /> eVANpe M FF4Cta*ID <br /> Edana M Fruciano <br /> Project Manager/Sacramento Laboratory 7030652 Bas <1' <br />