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Y 4 <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364 9233 <br /> G) 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(915)988-9673 <br /> �rilli) Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)9Z1-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)791-0342 <br /> Oler-Ryan -Dublin Client Project ID Unocal 8S#2859, Stockton Sampled Mar 12, 1999 <br /> 6747 Sierra Court, Suite J Sample Matrix Water Received Mar 12, 1999 - <br /> Dublln, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Mar 16, 1999 ` <br /> Attention Deanna Harding First Sample# 903-1233 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX / MTBE <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit ID ID ID LD ID ID <br /> µg/L 903-1233 903-1234 903-1235 903-1236 903-1237 903-1238 <br /> TB-LB MW-4 MW-5 MW-7 MW-8 MW-9 <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 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 /> lootal Xylenes 0 50 N D N D N D N D N D N D <br /> i <br /> MTBE 25 ND ND ND ND ND 29 <br /> Chromatogram Pattern - -- - - - <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 1 0 1 0 1 0 10 <br /> Date Analyzed 3/13/99 3/13/99 3/13/99 3/13/99 3/13/99 3/13/99 <br /> Instrument Identification HP-2 HP-2 HP-2 HP-2 HP-2 HP-2 <br /> Surrogate Recovery, % 100 106 99 103 102 106 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N 0 were not detected above the stated reporting limit <br /> EOUOIA ANALYTICAL, #1271 <br /> Janne Fegley <br /> Project Manager <br /> 9031233 GET <1> <br />