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680 Chesapeake Dnve Redwood C ty CA 94063 (650)364-9600 FAX(650)364-9233 ' <br /> Sequoia 404 N Wiget Lane Walnut Geek CA 94598 (9Z5)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792.0342 <br /> 1551 Industria)Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> Gettler-Ryan -0ublin Client Project 110 Unocal SS#0123, Tracy Sampled Jun'14, 1999 <br /> 6747 Sierra Court, Suite J Sample Matrix Water Received Jun 14, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Jun 30, 1999 <br /> _j Attention Deanna Harding First Sample # 906-1307 YJ h A n Hv <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX / MTBE <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I D I D. I D 1 D. I D I.D. <br /> yg/L 906-1307 906-1308 906-1309 906-1310 906-1311 906-1312 <br /> TB-LB U-1 U-2 U-3 U-4 U-5 <br /> Purgeable <br /> Hydrocarbons 50 N D 110 N D N D 1,400 N D <br /> Benzene 050 N D 13 N D N D 55 N D <br /> Toluene 050 N D N D 1 1 1 2 N D 1 1 <br /> Ethyl Benzene 050 N D 1 3 060 N D 120 N D <br /> Total Xylenes 050 N D 19 25 1 7 30 1 5 <br /> MTBE 25 ND 29 56 ND ND ND <br /> Chromatogram Pattern — - Gasoline& Gasoline - <br /> Unidentified <br /> - - --- — - — — - -- — Hydrocarbons -- <br /> C6-C12 <br /> Quality Control Data <br /> Report limit Multiplication Factor 1 0 1 0 1 0 10 10 1 0 <br /> Date Analyzed 6/23/99 6/23/99 6/23/99 6/23/99 6/23/99 6/23/99 <br /> Instrument Identification HP-5 HP-5 HP-5 HP-5 HP-5 HP-5 <br /> Surrogate Recovery % 88 85 95 87 85 91 <br /> (OC Limits = 70-130°/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 /> SEQUOIA ANALYTICAL, #1271 <br /> ?iann'e Fegley <br /> Project Manager <br /> 9061307 GET e 1> <br />