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Sequoia 680 Chesapeake Chive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1 <br /> ttler-Ryan - Dublin Client Project ID Unocal SS#2859, Stockton Sampled Mar 12,' 1999 <br /> 6747 Sierra Court, Suite J Sample Matrix Water Received Mar 12, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Mar 17, 1999 <br /> Attention Deanna Harding First Sample# 903-1227 <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 I D I D I D <br /> pg/L 903-1227 903-1228 903-1229 903-1230 903-1231 903-1232 <br /> MW-1 MW-3 MW-6 NP-1 MW-2 MW-10 <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D 4,900 82,000 124,000 <br /> Benzene 050 N D N D N D 150 2,400 13 000 <br /> Toluene 050 N D N D N D 88 16,000 56,000 <br /> Ethyl Benzene 050 N D N D N D 110 4,200 3 400 <br /> Orotal Xylenes 050 N D N D N D 1,000 21 000 22,000 <br /> MTBE 25 ND ND ND ND ND ND <br /> Chromatogram Pattern Gasoline& Gasoline Gasoline <br /> Unidentified <br /> Hydrocarbons <br /> C6 C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 1 0 40 400 400 <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, % 101 109 100 111 109 109 <br /> (QC 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 /> QUOTA ANALYTICAL, #1271 <br /> anne Fegley <br /> Project Manager <br /> 9031227 GET <1> <br />