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680 Chesapeake Drive Redwood Cry CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wlget 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 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-41 It (650)232-9600 FAX(650)232-9612 <br /> ettler-Ryan-Dublin v V Client Projectlh Unocal 88#5098, Stockton Sampled ' ,dun 17, 1999 <br /> 6747 Sierra Court, Suite J Sample Matnx Water Received Jun 18, 1999 , <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Jun 30, 1999 <br /> Attention Deanna Harding First Sample # 906-1568 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit ID LD I.D. I.D. LD ID <br /> pg/L 906-1568 906-1569 906-1570 906-1571 906-1572 906-1573 <br /> MW-14A MW-14 MW-15 MW-16 MW-17 MW-18 <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D N D N D N D <br /> Benzene 0 50 N D N D 1 1 N D N D N D <br /> Toluene 050 N D N D 4 3 N D N D N D <br /> Ethyl Benzene 0 50 N D N D 0 59 N D N D N D <br /> Total Xylenes 0 50 N D N D 3 8 N D N D N D <br /> Chromatogram Pattern -- - <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 1 0 1 0 1 0 1 0 <br /> Date Analyzed 6/25/99 6/25/99 6/25/99 6/25/99 6/25/99 6/25/99 <br /> Instrument Identification HP-4 HP-4 HP-4 HP-4 HP-5 HP-5 <br /> Surrogate Recovery, % 89 91 94 91 89 89 <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 /> l�,c �et <br /> ulianne Fegley <br /> Project Manager <br /> 9061562 GET �-2> <br />