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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 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 97.1 9600 FAX(916)921 0100 <br /> 411W <br /> Oettler-Ryan Client Project ID UNOCAL #5421-Stockton Sampled Apr 21 1998 <br /> 6747 Sierra Court, Suite J Sample Matrix Soil Received Apr 21, 1998 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Apr 23, 1998 <br /> Attention Clyde Galantine First Sample# 804-1420 <br /> QC Batch Number SP042298 <br /> 8020EXA <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX / MTBE <br /> Reporting Sample <br /> Analyte Limit I D <br /> mg/Kg 804-1420 <br /> OWS-4 <br /> Purgeable <br /> Hydrocarbons 1 0 N D <br /> Benzene 0 010 N D <br /> Toluene 0 010 0 016 <br /> Ethyl Benzene 0 010 N D <br /> Total Xylenes 0 010 0 023 <br /> MTBE 0 050 N D <br /> Chromatogram Pattern <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 <br /> Date Analyzed 4/22/98 <br /> Instrument Identification HP-2 <br /> Surrogate Recovery, % 120 <br /> (QC Limits = 40-140°/x) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> EQUOIA ANALYTICAL, #1271 <br />!' K p <br /> Laborato y Director <br /> 13041418 GET <2> <br /> 95 <br />