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ANALYTICAL PROCEDUIRS FOR <br /> THE DETECTION AND QVANTIFICATIOM OP TOTAL: PITROL= <br /> - MEL HYDROCARBONS AND MEL CONSITUENTS <br /> The following analytical proeeduras and analysis shall be used <br /> for the detection and quantification of patrols= hydrocarbons <br /> and fuel constituents. These techniques are to be followed when <br /> analysis is required for evaluation of either a suspected or <br /> confirmed tank leak as. prasented in the guidelines. These <br /> analytical techniques cover the full range of petroleum fuel <br /> hydrocarbons from gasoline- (C4-C -) to jet fuel (C1a- 1�) ► to <br /> diesel ( -C 2) in either a liquic�' or solid matrix. Detectton of <br /> complex fiydZrocarboa mixtures. are best achiever! - -using Gas <br /> Chromatograph with a Plame Ionization Detector (GC/FID) . <br /> I. TPMOLEUM gygj, M=CAR3WW5 A?MUSIS <br /> (Low to medium boiling point hydrocarbons) <br /> This includes the full range of gasoline. This technique <br /> may also be appropriate for- military grade jet fuels. <br /> A. sumle Preparation <br /> 1. Water <br /> Use EPA method 8.020,,. Headspace or EPA method 5030,- <br /> Purge and Trap, (EPA manual SW-846, April 1984) . <br /> Methanol extraction should be used in those cases <br /> where the sample is - representative of an aged <br /> Vial, or it is desired that the heavier ands of <br /> gasoline are -to be extracted. <br /> 2. Soil <br /> Use EPA method 50201 Headspace or EPA method 5030, <br /> Purge and Trap, (EPA manual SW-846r April 1984-) .: <br /> Methanol extaction should be used in those cases <br /> where the sample.. is representative of an aged <br /> fuel, or it is desired that the heavier ends of <br /> gasoline are to be extracted. <br /> B. Analysis <br /> 1. Chromatographic operations for detection of total <br /> petroleum. fuel hydrocarbons without BTX <br /> distinction. <br /> Detector: Plane Ionization <br /> Column:. 10 Percent SP-2100 on 80.100 aft x 1/80 <br /> glass supelcoport. Capillary columns may also be <br /> used .as a substitute to improve separation. <br /> Carrier Gas: Nitrogen at 30mWmin. - <br /> Injector Temperature: 250°C <br /> 2-1 <br />