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680 Chesapeake Drive Redwood City CA 94063 (650)3649600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9ZI-0t0o <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)79z-1865 FAX(707)792.0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)Z32-9600 FAX(650)232-9612 <br /> lronmentalAesolut6s Client F rolect ID ERf 205504T7/Tosco#5885 Sampled May 10, 1999 <br /> Digital Dr, Ste 100 Sample Matrix Water Received May 10, 1999 <br /> Novato, CA 94949 Analysis Method EPA 5030/8015 Mod /8020 Reported May 21, 1999 <br /> Attention Keith Romstad First Sample # 905-0543 <br /> QC Batch Number GCO51299 GCO51299 <br /> 802005A 802005A <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX / MTBE <br /> Reporting Sample Sample <br /> Analyte Limit I D I D ' <br /> jig/L 905-0543 905-0544 I ` .SUN 10 1999 <br /> W-6-MW3 W-6-MW2 552�i��i <br /> Purgeable ---------..----------------_ <br /> Hydrocarbons 50 N D N D <br /> Benzene 050 N D N D <br /> -toluene 050 N D N D <br /> Ethyl Benzene 0 50 N D N D <br /> Dotal Xylenes 050 N D N D <br /> MTBE 25 53,000 6,900 <br /> Chromatogram Pattern - <br /> Quality Control Data <br /> Report Limit Multiplication Factor 200 10 <br /> Date Analyzed 5/12/99 5/12/99 <br /> Instrument Identification HP-5 HP-5 <br /> Surrogate Recovery, % 90 83 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasafane standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL„ #1271 <br /> P <br /> Laborato D ctor <br /> 9050543 ENR <1> <br />