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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)3649233 <br /> Sequoia 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue 5utte 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0 100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> isettler-Ryan - Dublin Client Project 1D Unocal S$#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 EPA 5030/8015 Mod /8020 Reported Jun 17, 1999 <br /> Attention Deanna Harding First Sample# 906-0546 <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. LD I D. I D <br /> ug/L 906-0546 906-0547 906-0548 906-0549 906-0550 906-0551 <br /> MW-5D MW-5S MW-61D MW-6S MW-7D MW-7S <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D N D N D N D <br /> Benzene 050 N D N D N D N D 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 /> MTBE 25 ND ND 51 18 ND ND <br /> Chromatogram Pattern - - <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 10 1 0 1 0 1 0 1 0 <br /> Date Analyzed 6/9/99 6/9/99 6/9/99 6/9/99 6/9/99 6/9/99 <br /> Instrument Identification HP-5 HP-4 HP-4 HP-4 HP-4 HP-4 <br /> Surrogate Recovery, % 93 89 85 89 87 90 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against afresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 Please Note <br /> * Report revised 7/2/99 <br /> \ J anne Fegley 1 <br /> Project Manager 9060540 GET <2> <br /> i <br /> t <br />