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Sequoia 680 Chesapeake Drive 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 /> r <br /> Oettler-�Ya'n'-bublin Client Project 10 Tosco'(Un6ca1)'SS#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# 901-1966 <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 LD E D <br /> dig/L 901-1966 901-1967 901-1968 901-1969 901-1970 901-1971 <br /> MW-7 MW-8 MW-9 MW-11 VW-1 VW-3 <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D N D N D N D <br /> Benzene 050 ND ND ND ND ND ND <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 /> Wotal Xylenes 050 N D 10 N D 082 N D N D <br /> MTBE 25 40 N D N D N D N D 1,300 <br /> Chromatogram Pattern -- .. -_ __ -- <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 10 1 0 1 0 20 <br /> Date Analyzed 2/5/99 2/6/99 2/5/99 2/5/99 2/5/99 2/7/99 <br /> Instrument Identification HP-2 HP-2 HP-2 HP-2 HP-2 HP-2 <br /> Surrogate Recovery, % 104 108 103 103 87 113 <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 /> QUOTA ANALYTICAL,#1271 <br /> nne Fegley <br /> Project Manager <br /> 9011960 GET <2> <br />