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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wegct Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> SECOR Client Project ID ARCO 2133, Stockton, CA Sampled Mar 19, 1998 <br /> 3050 Fite Circle Ste 204 Sample Matrix Water Received Mar 23, 1998 <br /> Sacramento, CA 95827 Analysis Method EPA 5030/8020, DHS Luft Reported Apr 7, 1998 <br /> Attention Rusty Benkosky First Sample # 803-1004 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample <br /> Analyte Units Results <br /> erg/L 803-1004 <br /> MW 4 <br /> Purgeable N D <br /> Hydrocarbons Reporting Limit 50 <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 .1 N D <br /> Reporting Limit 050 <br /> Chromatogram - <br /> Pattern <br /> Quality Control Data <br /> Date Analyzed 03/27/98 <br /> Instrument Identification GCHP-2 <br /> Surrogate Recovery, % 101 <br /> (OC Limits = 60-140°/x) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoitne standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL, E P #11624 <br /> + a Schneid r <br /> roject Manager/Sacramento Laboratory <br /> 8030992 SES <3> <br />