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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> Sequoia <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988 9600 FAX(915)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (9t6)921 9600 FAX(916)921 0100 <br /> E455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707)792 0341 <br /> 0 <br /> Gettler Ryan/Geostrategies Client Prof ID 140124 04 Sampled 06/30/98 <br /> 6747 Sierra Court Suite J Sample Descript Inf Received 07/02/98 <br /> Dublin, CA 94568 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 07/02/98 <br /> Attention Deanna Harding Lab Number 9807095-01 Reported 07/12198 <br /> QC Batch Number GC070298BTEX02A <br /> Instrument 1D GCHP02 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 10 170 <br /> Benzene 010 N D <br /> Toluene 010 N D <br /> Ethyl Benzene 010 19 <br /> Xylenes (Total) 010 6 3 <br /> Chromatogram Pattern <br /> Unidentified HC C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 97 <br /> Analytes reported as N D were not present above the stated hmlt of detection <br /> SEQUOIA ANALYTICAL - FLAP #1210 <br /> Granicher <br /> Project Manager Page 1 <br />