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ANALYTICAL METHODOLOGY <br /> Total Petroleum Hydrocarbons (TPH) Extractables by GC-FM <br /> Extraction Procedure: <br /> WATER -- <br /> ''a A l liter Sample is <br /> • p poured into a 2 liter separatory funnel. 3x100 ml <br /> extracticns 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 /> �f <br /> Y; <br /> SOIL <br /> F <br /> A 30gram, 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 1 hour. The liquid is.decanted off <br /> u - andthe process is repeated with an additional 50 ml of methylene chloride. <br /> The combined solvent extracts are filtered through sodium sulfa <br /> extract is concentrated to a 5 ml final volume, to and the ; <br /> - <br /> I J:1 <br /> t <br /> GC ANALYSIS <br /> f An appropriate volume of the sample extract is injected into a Gas <br /> ti <br /> Chromatograph e <br /> g p quipped with a Flame Ionization Detector (FID), a split/ <br /> splitless capillary injector (operated in the splitless mode), and a fused F <br /> silica capillary column. .The TPH fraction is quantitated as gasoline and/or <br /> #2 diesel fuel (and/or different <br /> petroleum hydrocarbon fuel .t s if <br /> # I requested, such as 3P-4 jet fuel) based on relative.retention_times.and .-.-..-. <br /> ..__' examination of:the elution-profile. Ttse TPH fraction quantitation <br /> --..... <br /> on chromatographic q titation is based <br /> peak areas against a multipoint standard curve. <br /> Y J <br /> F <br /> 4;I <br /> 1 ✓ <br /> a <br /> CHEMWEST ANALYTICAL LABORATORIES.INC. <br /> +'i <br /> mmq MR <br />