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•1 <br /> y <br /> k ' <br /> 01 <br /> 1 <br /> ANALYTICAL METHODOLOGY <br /> Y '4 <br /> F Total Petroleum Eydrocarbons (TPH) £xtractables by GC-FID <br /> t <br /> Extraction Procedures <br /> *J WATER <br /> j <br /> r� A 1 ]iter sample is poured into a 2 liter separatory funnel. 3x100 ml <br /> extractions 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 /> !" SOIL+ <br /> A 30 gram, or other appropriate aliquot of soil, is mixed with 10 grams of <br /> rP"°1 washed sodium.sulfate. 100: mis of methylene chloride is added to the soil <br /> ,.� and placed for 1 hour. The-liquid .+e decanted off <br /> on a mechanical shaker <br /> with an additional 50 m1 of methylene chloride. <br /> and the process is repeated <br /> The combined solvent extracts are filtered through sodium sulfate and the <br /> extract= is concentrated a 5 uLl final volume. . <br /> GC ANALYSIS <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 /> Splitless capillary-injector (operated in the splitless mode), and a fuse <br /> silica capillary.' column. The TPH fraction is quantitated as gasoline aha/or <br /> -412 dies' .fuel-(and/or different-petroleum hydrocarbon-fuel types-if -- - <br /> requested,.such as JF-4 jet fuel? based on relative retention.timem :� r�� <br /> amination of the elution profile. The TPH fract�.� <br /> ex t quantitation � rased <br /> { <br /> onchromatographicpeak areas against a multipoint. ndard curve. <br /> Li <br /> � E <br /> CNE14iWEST ANALYTICAL LABCRA CRIFS,INC. ,' <br />