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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ler-Ryan - Dublin Client Project ID Unocal SS#5098, Stockton Sampled Mar 18, 1999 <br /> 47 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 # 903-1859 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample <br /> Analyte Limit I D I D 10 <br /> pg/L 903-1859 903-1860 903-1861 <br /> MW-19D MW-19S Delta <br /> College <br /> Purgeable <br /> Hydrocarbons 50 14,000 710 N D <br /> Benzene 050 620 34 N D <br /> Toluene 050 1 000 41 N D <br /> Ethyl Benzene 050 750 32 N D <br /> Total Xylenes 050 1900 71 N D <br /> Chromatogram Pattern Gasoline Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 20 1 0 1 0 <br /> Date Analyzed 3/25/99 3/25/99 3/25/99 <br /> Instrument Identification HP-9 HP-9 HP-9 <br /> Surrogate Recovery, % 102 100 94 <br /> (CSC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N t] were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 <br />� tit <br /> JJInne Fegley <br /> Project Manager <br /> 9031847 GEr <3> <br /> {r <br />