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ANALYTICAL METHODOLOGY <br /> 1 <br /> Halogenated Volatile Organics by Purge & Trap and GC-ELC D <br /> h <br /> WATER - Method 601 or 8010 <br /> i <br /> 'f <br /> A 5 ml sample volume is purged:;on -a .suitable purge and trap system with <br /> helium. The purged sample is analyzed on a Gas Chromatograph equipped <br /> with an Electrolytic Conductivity (Ball) Detector (ELCD). Either an SP1000 <br /> on 'Carbopack B packed column, or a DB-624 fused silica megabore column, <br /> is used to separate the compounds.; <br /> SOIL - Method 8010 <br /> p <br /> A i0 gram; or other appropriate, aliquot of soil, is weighed into a clean <br /> VOA vial. ; Soils received in brass core tubes are sampled by discarding.,2-5 <br /> centimeters of soil from each end of the tubes (this is done to reduce the <br /> possibility�of analyzing a portion of soiil that has been exposed to sampling <br /> technique icontamination). Equal aliquots of soil are then removed from° <br /> each end of the tube and combined: in the VOA vial. Soil in jars or bags <br /> is aliquoted using a similar technique.°which discards exposed sample <br /> surfaces. A 10 ml, or other appropriate volume of methanol., is added to <br /> the soil and the soil is shaken with the solvent. . 100 ul of the extract, or <br /> a reduced ;aliquot or volume of .a suitable dilution, is injected into 5 ml' of <br /> laboratoryo blank water and analyzed by the same technique used for water <br /> sa raples. <br /> i <br /> 4 <br /> I <br /> it <br /> 9 <br /> r <br /> r <br /> 5 <br /> CHFMWEST ANALYTICAL LABORATORIES.INC <br /> d <br /> E ' <br />