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FIELD TRAPPING OF SUBSURFACE VAPOR PHASE PETROLEUM HYDROCARBONS
Citation:
Moyer, E. E., D. W. Ostendorf, D H. Kampbell*, AND Y. Xie. FIELD TRAPPING OF SUBSURFACE VAPOR PHASE PETROLEUM HYDROCARBONS. GROUNDWATER MONITORING AND REMEDIATION. National Ground Water Association, Westerville, OH, 14(1):110-119, (1994).
Impact/Purpose:
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Description:
Soil gas samples from intact soil cores were collected on adsorbents at a field site, then thermally desorbed and analyzed by laboratory gas chromatography (GC). ertical concentration profiles of predominant vapor phase petroleum hydrocarbons under ambient conditions were obtained for the zone directly above the capillary fringe. ater and residual phase weathered aviation gasoline were present in this region of the profile. he sampling, trapping, and GC methodology was effective in most respects. eproducibility, trapping, and desorption efficiency were generally satisfactory, and different sorbent tubes gave similar results. inor shortcoming of the method occurred with the most volatile compound, 2,3-dimethylbutane, which was poorly retained during several weeks of storage time and was also poorly desorbed. apor phase concentrations of predominant hydrocarbon compounds all increased with depth at one sampling location. t a more highly contaminated location, concentrations of highly volatile compounds increased with depth while concentrations of less volatile compounds remained constant or decreased, possibly indicating distillation effects. catter in the data was attributed to heterogeneities in water and residual phase distribution. [A copy is available at NTIS as PB94158789.]
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NTIS pdf (PDF, NA pp, 9 KB, about PDF)FIELD TRAPPING OF SUBSURFACE VAPOR PHASE PETROLEUM HYDROCARBONS
