Laserfiche WebLink
- - C <br /> 3. <br /> WOMEN <br /> Fag <br /> i <br /> 4, ANALYTICAL METHODOLOGY <br /> 1 <br /> Po <br /> F <br /> m, <br /> Total Petroleum Hydrocarbons (TPH) Extractables by GC-FID <br /> Extraction Procedure: <br /> } , WATER - <br /> A I liter sample is poured into a 2 liter separatory funnel. 3x100 ml <br /> extractions with methylene chloride (2 minute shake outs) are completed. <br /> a I ' The methylene chloride is decanted off and concentrated to a 5 ml final <br /> volume. <br /> SOIL - <br /> �'`' A 30 gram, or other appropriate aliquot of soil., is mixed with 10 grams of <br /> washed sodium sulfate. 100 mis of methylene chloride is added to the soil <br /> : and placed on a mechanical shaker for I hour. The liquid is decanted off <br /> r and the process is repeated with an additional 50 ml of methylene chloride. <br /> The combined solvent extracts are filtered through sodium sulfate and the <br /> r� extract is concentrated to a 5 ml final volume. <br /> ' GC ANALYSIS <br /> r <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 /> y 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 /> #2 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 /> § h examination of the elution <br /> profile.' The TPH fraction quantitation is based <br /> f , on chromatographic peak areas against a multipoint standard curve. <br /> V <br /> CHEMWEST ANALrICAL LABORATORIES,INC. <br /> f <br />