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r <br /> I <br /> ANALYTICAL METHODOLOGY <br /> Aromatic Volatile Organics by Purge &..Trap and PID/FID <br /> WATER - Method 602 or 8020 <br /> A 5 ml sample ;,volume, or 5 ml of a suitable dilution, is purged on a <br /> Tekmar LSC-2/ALS purge and trap system with helium. The purged sample <br /> is analyzed on 1`a Varian 3400 GC equipped with a' Photoionization Detector <br /> and a Flame Ionization Detector (PIDJFID). A packed column is used to <br /> separate the compounds. <br /> SOIL - Method !i8020 <br /> A 10 gram or other appropriate aliquot of soil is weighed into a clean VOA <br /> vial. Soils received in brass care tubes are sampled by discarding 1-2 <br /> inches of soil from each end of the tubes (this is done to reduce the i <br /> possibility of analyzing a portion of soil that has been exposed to sampling <br /> technique contamination). Equal aliquots of soil are then removed from i <br /> each end of the tube and combined in the VOA vial. Soil in jars or bags <br /> is aliquoted with a similar technique which discards exposed sample <br /> surfaces. A 10! ml or other 'appropriate volume of methanol is added to the <br /> soil and the soil is shaken with the solvent. 100 ul of the extract, or a <br /> reduced aliquot or volume of a suitable dilution, is injected into 5 ml of <br /> laboratory blank water and then analyzed by the same technique as a water <br /> sample. 4 <br /> r <br /> ;j <br /> CHEMWEST ANALYTICAL LABORATORIES,WC. # <br />