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G <br /> $ ANALYTICAL METHODOLOGY <br /> f <br /> Total Petroleum Hydrocarbons (TPH) Extractables by GC-FID <br /> ! Extraction Procedure: <br /> WATER - <br /> f:a9 <br /> P- 1 liter sample is, poured into a 2 liter separatory funnel. 3x100 ml <br /> extractions with methylene chloride (2 minute shake outs) are completed. <br /> f The methylene chloride is decanted off and concentrated to a 5 ml final <br /> volume. <br /> F <br /> SOIL <br /> A 30 grarn, or other appropriate aliquot of soil, is mixed with YO Brame of <br /> r washed sodium sulfate. 100 mis of.methylene chloride is added to the soil <br /> and 'placed on a mechanical shaker for l hour. The liquid' is decanted off <br /> and the process is repeated with an additional 50 ml of meihylene chloride. <br /> The combined .solvent extracts are filtered through sodium sulfate and the . <br /> extract is concentrated to a 5 ml final volume.. ; <br /> S � <br /> GC:ANNALYSIS - <br /> �s• i <br /> An appropriate volume .of the-sample extract is injected into a Gas <br /> Chromatograph equipped with a :Flame Ionization Detector (FID), a split/ <br /> splitless capillary injector (operated in the splitless mode), and a fused <br /> silica. capillary,column. The TPH fraction is quantitated as gasoline. and/or <br /> �# <br /> 42 diesel fuel (and/or different petroleum hydrocarbon fuel types if <br /> -:- <br /> ..... <br /> ---;requested; such as-JP-4jet....fuel)fuel)-based onrelative- retei�tiori:times aril _--- ;- <br /> .. examination of the. elution profile. The TPH fraction quantitation is based <br /> am.chromatographic peak areas:.against. a multipoint standardcurve. <br /> A <br /> { CHEMWEST ANALYTICAL LABORATORIES,INC. <br /> y . <br />