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tie <br /> I <br /> 'N ANALYTICAL METHODOLOGY <br /> r <br /> Total Petroleum Hydrocarbons (TPH) Extractables by GC-FID <br /> Extraction Procedure: <br /> WATER - <br /> p 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 /> f The .methylene chloride is decanted off and concentrated to a 5 ml final <br /> i <br /> volume. <br /> SOIL - <br /> I <br /> of soil, is mixed with 10 grams of <br /> A 30 gram, or other appropriate aliquot <br /> washed sodium sulfate. 100 mis of methylene chloride is added to the soil f <br /> and: placed on .a mechanical shaker for 1 hour. The liquid is decanted off <br /> F and the process is repeated with an additional 50 ml of methylene chloride. i <br /> The combined solvent extracts are filtered through sodium sulfate and the <br /> extract is concentrated.to a 5 ml final :volume. <br /> GC ANALYSIS <br /> An. appraprfate:volume of .the sample exta;act is injected into a Gas �� <br /> Chromatograph equipped with a Flame Ion:ixation Detector.(FID), a sp. t/ <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 /> #Z .diesel. fuel, (and/or 'different .petroleum. hydrocarbon fuel types if <br /> 4.. requested, such as JP-4 jet fuel) based on relative retention times and <br /> examinationof the elution profile T.he":TPH. fraction.. quantitation.- is based <br /> ' a on chromatographic..peak.ureas against, a multipoint standard curve <br /> z I6i <br /> N�N <br /> 1 <br /> Ul <br /> CHEMWEST ANALYTICAL LABORATORIES.INC. <br /> Y' <br /> '(y j <br /> 4 l, - <br />