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ANALYTICAL M:THODCLOGY ' <br /> Halogenated Volatile Organics by Purge 1, Trap and CC-ELCD <br /> WATER - Method 601 or 8010 <br /> A 5 ml sampla vclume is purged on a suitable purge and trap systcm with <br /> helium. The purged sample is analyzed on a Gas Cnromatograph equipped <br /> with an Electrolytic Conductivity (Hail) Detector (ELCD), Either an SPI000 <br /> an Carbopack E packed column, or a DB-624 fused silica megabore column, <br /> as used to separate the compounds, <br /> SOIL Method $010 <br /> A 10 grain, or ether 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 /> pcssibility of analyzing a portion of soul that has been exposed to sampling <br /> technique contamination). Equal aliquots of soil are then removed from <br /> each end of the tube and combined in the VOA vial. Soil to jars or bags <br /> �s 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 sail is shaken with the solvent 160 al of the extract, or <br /> a reduced aliquot or volume of i su?table dilution, is infected into 5 ml of <br /> laboratory blank water and analyzed by the same technique used for water <br /> samples <br />