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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 /> �111� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)9Z1-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> >>s Si <br /> tiler-Ryan - Dublin A Client Project 10 Unocal S#0123Ras <br /> Mfeived <br /> led fvlar 16, 1999 r <br /> '."5747 Sierra Court, Swte J Sample Matrix WaterV Mar 17 1999 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Apr 2, 1999 <br /> Attention Deanna Harding First Sample # 903-1666 APR 1 fes/ 999 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBNjvri �lYElll� • <br /> 3ENERAI CONTRACTORS <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I D 1.10 I.D I D I D I D <br /> lig/L 903-1666 903-1667 903-1668 903-1669 903-1670 903-1671 <br /> TB-LB U-1 U-2 U-3 U-4 U-5 <br /> Purgeable <br /> Hydrocarbons 50 N D N D 73 N D 1,400 N D <br /> Benzene 050 N D 077 1 3 N D 15 N D <br /> Toluene 0 50 N D N D N D N D 13 N D <br /> Ethyl Benzene 050 N D N D 059 N D 56 N D <br /> Total Xylenes 050 N D N D 1 1 N D 49 N D <br /> MTBE 25 ND 45 17 ND 56 ND <br /> Chromatogram Pattern -- -- Gasoline -- Gasoline & - <br /> Unidentified <br /> Hydrocarbons <br /> C6-C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 10 1 0 1 0 1 0 1 0 <br /> Date Analyzed 3/27/99 3/27/99 3/27/99 3/27/99 3/27/99 3/27/99 <br /> Instrument Identification HP-2 HP-2 HP-2 HP-2 HP-5 HP-5 <br /> Surrogate Recovery, % 102 101 110 96 94 93 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting lima <br /> SEQUOIA ANALYTICAL, #1271 <br /> tliannee Fegiey <br /> Project Manager <br /> 9031666 GET <1> <br />