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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364-9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Pacific Environmental Group, Inc Client Project ID Unocal 2859, Stockton, CA Sampled Oct 23, 1996 <br /> 2025 Gateway Place, Suite 440 Sample Matrix Air Received Oct 24, 1996 <br /> San Jose, CA 95110 Analysis Method EPA 5030/6015/8020 Reported Oct 30, 1996 <br /> Attention Justin Hawkins First Sample # 610-1150 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> pg/L 610-1150 610-1151 <br /> 1NFL EFFL <br /> Purgeable <br /> Hydrocarbons so 2,400 680 <br /> Benzene 0 050 18 10 <br /> Toluene 0 050 76 40 <br /> Ethyl Benzene 0 050 38 16 <br /> Total Xylenes 0 050 240 88 <br /> Chromatogram Pattern Weathered Gasoline <br /> Gasoline C6-C12 <br /> C6-C 12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 50 5 0 <br /> Date Analyzed 10/25/96 10/25/96 <br /> Instrument Identification GCHP-7 GCHP-2 <br /> Surrogate Recovery, % 94 130 <br /> (QC Limits = 70-130%) <br /> Purgeabie Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> 4V000IA ANALYTICAL, ELAP #1624 <br /> gyp,ne EZ-71-SU]K1C-R , <br /> Linda C Schneider <br /> Project Manager/Sacramento Laboratory <br /> 6101150 PEG <1> <br />