Laserfiche WebLink
ANALYTICAL METHODOLOGY <br />Total Petroleum Hydrocarbons by Purge & Trap and GC -FID <br />WATER - DHS Method - Luft Field Manual <br />A 5 ml sample volume, or 5 ml of a suitable dilution, purged on a <br />suitable purge and trap system with helium. The purged sample is analyzed <br />on a Gas Chromatograph equipped with a Flame Ionization Detector (FID). <br />A packed column is used to separate the compounds. <br />SOIL - DHS Method - Luft Field Manual <br />A 10 gram, or other appropriate aliquot of soil, is weighed into a clean <br />VOA vial. Soils received in brass core tubes are samned by discarding 2-5 <br />centimeters of soil from each end of the tubes (this i= done to reduce the <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 <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 me :hancd, is added to <br />the soil and the soil is shaken with the solvent. 100 -.1 of the extract, or <br />a reduced aliquot or volume of a suitable dilution, is _njected into 5 ml of <br />laboratory blank water and analyzed by the same technique used for water <br />sa mples. <br />CHE*.'.VEST AN=._YTICAL LABJRATC,-i!ES, INC <br />