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'j M �:„�.•-ice � - '. , � <br /> ANALYTICAL METHODOLOGY ' <br /> Total Petroleum Hydrocarbons (TPH) Exttactables by GC/FID ' <br /> Extraction Procedure. <br /> WATER - <br /> A 1 liter sample is poured into a 2 liter': separatory funnel. 3x100 ml <br /> aliquots of methylene chloride (2 minute shake outs) are completed. The <br /> methylene chloride is decanted off andconcentrated to a 5 ml final volume. <br /> SOIL - <br /> 30 grams of soil is mixed with 1:0 grams of washed sodium sulfate. 100• mis <br /> of methylene chloride is added to the soil and placed on 'a mechanical' <br /> shaker for l hour. The liquid is decanted off and the process is repeated <br /> with an additional 50 ml of methylene chloride. The combined solvent <br /> extract is filtered through sodium .sulfate and the extract .is concentrated to <br /> a 5 ml final volume. <br /> I, <br /> I . <br /> I . <br /> GC ANALYSIS - <br /> f 3 ul's of the sample extract is injected, into a Varian 3400 GC equipped <br /> with a Flame Ionization Detector, (FID), a split/splitless capillary injector <br /> operated in the splitless mode and a 30: meter, 0.25 mm ID, DB-5 capillary <br /> column temperature programmed from 40 to 280 deg C. The TPH fraction is <br /> quantitated as gasoline and/or diesel fuel. (and/or different petroleum <br /> hydrocarbon fuel types if requested, such as JP-4 jet fuel.) based on relative <br /> retention times against a multipoint standard curve, The- TPH fraction <br /> quantitation is based on chromatographic peak areas. <br /> CHEMWEST ANALYTICAL LA80RAYORIES,INC. <br />