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kY1 <br /> I <br /> 1 <br /> P ANALYTICAL METHODOLOGY <br /> Total Petroleum Hydrocarbons (TPH) Extractables by GC-FID <br /> Extraction Procedure: <br /> ra <br /> WATER - <br /> A 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 /> The methylene chloride is decanted off and concentrated to a 5 ml final <br /> volume. <br /> 5: <br /> -SOIL -- <br /> }`� A 30 : ram,. or other appropriate ppropriate aliquot of soil, is mixed with 10 grams of <br /> washedsodium. sulfate. 100 nils of methylene. chloride is added to .the soil <br /> ell, and placed on a mechanical shaker for 1 hour. The liquid is decanted off <br /> and the process is repeated with an additional 50 ml of methylene chlorids. <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 /> GQ: ANALYSIS <br /> An appropriate volume of .the sample extract.is injected into a Gas <br /> " (r Chromatograph .equipped with a .Flame Ionization Detector (FID),.a split/ <br /> splitless capillary injector (operated in the splitless mode), and a fused ;. <br /> s silica capillary column. The TPH fraction is quantitated as gasoline and/or <br /> #Z diesel fuel (and/or different petroleum hydrocarbon.fuel types if <br /> requested, such as 'JP-4 jet fuel) based on relative retention times and <br /> examination of the elution profile. The TPH fraction quantitation is based <br /> f� P . <br /> on..chromatographic.._peak-areas against--a multipoint standard curare <br /> 4 <br /> CF',FAWEST ANALYTICAL LABORATORIES.INC. <br /> ti <br /> o- <br /> 7F- F K <br />