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ANALYTICAL METHODOLOGY <br /> BTX - Method 8280 <br /> WATER - <br /> 5 ml sample volume is purged on a Tekmar LSC-2/ALS purge and <br /> trap system with Helium. The purged sample is analyzed onia <br /> Varian 3400 GC equipped with a Photo Ionization Detector. and a <br /> Flame Ionization Detector (PID/FID) . A Bentone packed column is <br /> used to separate compounds. <br /> SOIL - <br /> 4 grams of soil are weighed into a 40 ml QA/QC prepped VOA ;; <br /> vial. Soils received in brass core tubes are sampled by discarding <br /> 1 - 2 inches of soil from each end of .the tubes. (This islgdone <br /> to reduce the possibility of analyzing a portion of'isoil that has <br /> been exposed to possible sampling technique contamination) : 2 <br /> grams of soil are then removed from each end of the� tube and <br /> combined in the 49 ml VOA vial. Soil in jars or bags is aliquoted <br /> with a similar technique which discards exposed sample surfaces. <br /> 10 ml of methanol are added to the soil and the soils is shaken <br /> with the solvent. 100 ul of the extract is injectedi into 51�ml <br /> of laboratory blank water and then analyzed by the same 'technique <br /> as a water sample. <br /> i M <br /> CH EMWEST ANALYTICAL LABORATORIES,INC. <br />