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• 680 Chesapeake Drive Redwood City Ca 94063 (650)364-9600 FAX(650)3649233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925}988-9600 FAX(925)98&9673 <br /> 819 Striker Avenue Suite B Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> An^��7}���� 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707)792-0342 <br /> [� Y ` 1551 Industrial Road San Carlos CA 94070-4111 (650)232 9600 FAX(650)232-9612 <br /> ettler-Ryan - Dublin Client Project ID Unocal <br /> � 5S#5886, Stockton Sampled Jun 1-2'1999 <br /> 6747 Sierra Court, Suite J Sample Matrix Water Received Jun 2, 1999 <br /> Dublin, CA 94568 Analysis Method PPA 5030/8015 Mod/8020 Reported Jun 17, 1999 <br /> Attention Deanna Harding First Sample# 906-0558 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX / MTBE <br /> Reporting Sample Sample Sample <br /> Analyte Limit I D 1 D I D <br /> Ng/L 906-0558 906-0559 906-0560 <br /> MW-10S MW-101 MW-10D <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D <br /> Benzene 050 N D N D N D <br /> Toluene 050 N D N D N D <br /> Ethyl Benzene 0 50 N D N D N D <br /> Total Xylenes 050 N D N D N D <br /> MTBE 25 57 16 N D <br /> Chromatogram Pattern - - _ <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 10 1 0 <br /> Date Analyzed 6/10/99 6/10/99 6/10/99 <br /> Instrument Identification HP-2 HP-2 HP-2 <br /> Surrogate Recovery, % 94 97 95 <br /> (QC 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 limit <br /> SEQUOIA ANALYTICAL, #1271 <br /> lianne Fegley <br /> Project Manager <br /> 9060540 GET <4> <br /> -CC_ <br />