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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 (925)988-9600 FAX(925)988-9673 <br /> 14W Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)9ZI-9600 FAX 916) 921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 707 792-1865 FAX(707)792-034Z <br />*ttler-Ryan - Dublin Client Project iD Unocal SS#5098, Stockton Sampled Mar 18, 1999 <br /> 747 Sierra Court, Suite J Sample Matrix Water Received Mar 19, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Mar 29, 1999 <br /> Attention Deanna Harding First Sample # 903-1853 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit ID ID ID ID ID ID <br /> erg/L 903-1853 903-1854 903-1855 903-1856 903-1857 903-1858 <br /> MW-14A MW-14 MW-15 MW-16 MW-17 MW-18 <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D 67 N D N D <br /> Benzene 050 N D N D N D 2S N D N D <br /> Toluene 050 ND ND ND ND ND ND <br /> Ethyl Benzene 050 N D N D N D N D N D N D <br /> Total Xylenes 050 N D N D N D N D N D N D <br /> Chromatogram Pattern -- -- Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 1 0 1 0 1 0 10 <br /> Date Analyzed 3/25/99 3/25/99 3/25/99 3/25/99 3/25/99 3/25/99 <br /> Instrument Identification HP-9 HP-9 HP-9 HP-9 HP-9 HP-9 <br /> Surrogate Recovery, % 95 96 95 98 96 94 <br /> (CC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N 0 were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 <br /> J Ilanne Fegley <br /> roJect Manager <br /> 9031847 GET [2> <br />