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I� <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Crede,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 /> E <br /> ettler-Pyan`-bubllri Client Project 10 Tosco (Unabai) 88#6981, Stockton Sampled Jan 25-26, 1999 <br /> 6747 Sierra Court, Suite J Sample Matrix Water Received Jan 27, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Feb 18, 1999 <br /> 'Attention Deanna Harding First Sample# 901-1960 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX/ MTBE <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit ID ID ID ID ID ID <br /> pg/L 901-1960 901-1961 901-1962 901-1963 901-1964 901-1965 <br /> TB-LB MW-1 MW-2 MW-4 MW-5 MW-6 <br /> Purgeable <br /> Hydrocarbons 50 ND ND 2,200 ND ND ND <br /> Benzene 050 ND ND 610 ND ND ND <br /> Toluene 050 ND ND 21 ND ND ND <br /> Ethyl Benzene 0 50 N D N D 24 N D N D N D <br /> Wotal Xylenes 0 50 N D N D 72 N D N D N D <br /> MTBE 25 N D 62 270 95 35 N D <br /> Chromatogram Pattern -- -- Gasoline -- <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 20 1 0 1 0 1 0 <br /> Date Analyzed 2/4/99 2/5/99 2/5/99 2/5/99 2/5/99 2/5/99 <br /> Instrument Identification HP-2 HP-9 HP-2 HP-2 HP-2 HP-2 <br /> Surrogate Recovery, % 102 99 117 99 102 144 <br /> (CC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard U <br /> Analytes reported as N 0 were not detected above the stated reporting limit ll <br /> EQUOIA ANALYTICAL, #1271 FEB 9 2 10019 <br /> A4- GETTLER-RYAN INC. <br /> JeZ <br /> eFegley <br /> Pro)ect Manager GENERAL CONTRACTOR: <br /> 9011960 GET <1> <br />