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680 Chesapeake Drtve Redwood City CA 94063 (650)364-9600 FAX(650)3649233 <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)921.0100 <br /> 1415 Analytical 1551 Industrialcri11Blvd Raad North Ste D Petaluma CCA 94070-4111 (650)232-4954 (707) 1865 FAX(707)79Z-034Z <br /> 9600 FAX(650)232-9612 <br /> �IIronmental Resolutions Client project ICS E111205504T7/`I'osco#5886 Sampled Miy 10, 1999 <br /> 1�DLgital Dr, Ste 100 Sample Matrix Air Received May 10, 1999 <br /> Novato, CA 94949 Analysis Method EPA 5030/8015 Mod /8020 Reported May 21, 19999 <br /> Attention Keith Romstad First Sample# 905-0545 <br /> QC Batch Number GCO51399 GCO51399 GC051399 <br /> 802002A 802002A 802002A <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX/ MTBE <br /> Reporting Sample Sample Sample <br /> Analyte Limit I.D. 1.13 1 D <br /> Ng/L 905-0545 905-0546 905-0547 <br /> A-INF-MW2 A-INF-MW3 A-INF-MW3 <br /> 1106 1320 <br /> Purgeable <br /> Hydrocarbons 10 N D N D 19 <br /> Benzene 0 050 N D N D 0 21 <br /> Toluene 0 050 0 060 N D 023 <br /> Ethyl Benzene 0 050 N D N D N D <br /> Dotal Xylenes 0 050 N D N D 0 15 <br /> MTBE 025 N D 055 54 <br /> Chromatogram Pattern -- - Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 10 1 0 <br /> Date Analyzed 5/13/99 5/13/99 5/13/99 <br /> Instrument Identification HP-2 HP-2 HP-2 <br /> Surrogate Recovery, % 95 92 92 <br /> {DC 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 /> tm <br /> or ary firector:� <br /> 9050543 ENR <2> <br />