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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N WiBel Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Iwo 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*e1=Ftyan-'Dublin' ' w Client Project 10 Tosco 88#6981, Stockton f Sampled 'J61 21, 1998 <br /> 6747 Sierra Court, Suite J Sample Matrix Water Received Jul 22, 1998 <br /> h Dublin, CA 94568 Analysis Method EPA 5030/8015 Mod /8020 Reported Aug 11, 1988 <br /> Attention Deanna Harding First Sample # 807-1532 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX/ MTBE <br /> Reporting Sample <br /> Analyte Limit I D. <br /> pg/L 807-1532 <br /> VW-4 <br /> Purgeable <br /> Hydrocarbons 50 2,500 <br /> Benzene 050 97 <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> fatal Xylenes 050 57 <br /> MTBE 50 ND <br /> Chromatogram Pattern Gasoline S <br /> Unidentified <br /> Hydrocarbons <br /> >C8 <br /> Quality Control Data <br /> Report Umit Multiplication Factor 10 <br /> Date Analyzed 8/3/98 <br /> Instrument Identification HP-9 <br /> Surrogate Recovery, % 118 <br /> (OC 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 /> 4 <br /> lanne Fegiey <br /> Project Manager <br /> 8071520 GET <3> <br />