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r <br /> r <br /> I <br /> ANALYTICAL METHODOLOGY <br /> Total, Petroleum Hydrocarbons (TPH) Extractables by GC-FID <br /> Extraction Procedure: <br /> WATER - Luft Field Manual <br /> 1 � <br /> i A 1 liter sample is poured into a 2 liter reparatory funnel. 3x100 ml extractions <br /> I <br />,I with methylene chloride (2 minute shake outs) are completed. The methylene chloride <br />} is decanted off and concentrated to a 5 mi final volume. <br /> SOIL - Luft Field Manual <br /> A 30 gram, or other appropriate aliquot of soil, is mixed with 101 grams of washed <br /> sodium sulfate. 100 mis of methylene chloride is added to the soil. and placed on a. <br /> mechanical shaker for 1 hour. The liquid is decanted off and the process is repeated <br /> with an additional 50 ml of methylene chloride. The combined solvent extracts are <br /> filtered through sodium sulfate and the extract is concentrated to a 5 ml final <br /> volume. <br /> GC ANALYSIS - <br /> An appropriate volume of the sample extract is injected into a Gas Chromatograph <br /> equipped with a Flame Ionization Detector (FID), a split/ splitless capillary injector <br /> E (operated in the splitless mode), and a fused silica capillary column. The TPH <br /> fraction is quantitated as gasoline and/or 42 diesel fuel (and/or different petroleum <br /> hydrocarbon fuel types if requested; such ',as JP-4 jet fuel) based;'on relative <br /> retention times and examination of the elution profile. The TPH fraction <br /> quantitation is based on chromatographic peak areas against a multipoint standard <br /> curve. <br /> r <br /> w <br /> Ii <br /> i <br /> CHEMWESTANALYTICAL LABORATORIES,INC. <br /> 4 r <br /> j <br />