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Toxic Substances Hydrology Program

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Research Projects
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Contamination from Sources with Mixed Wastes

Treated wastewater disposal beds on Cape Cod, Massachusetts, which created a large subsurface plume of contaminated ground water.
Treated wastewater disposal beds, which created a large subsurface plume of contaminated ground water -- from the Cape Cod Site

Bibliography

Many contaminant sources introduce a diverse and complex mixture of organic and inorganic contaminants into the subsurface, which can complicate characterizations of contaminant transport, fate and effects. These sources include landfills and wastewater discharges. The resulting contaminant plumes are difficult to characterize, manage, and remediate. Reactions among dissolved chemicals, reactions between dissolved chemicals and the aquifer material, and microbial reactions can significantly accelerate or retard contaminant movement and complicate natural and engineered cleanup. Ongoing research focuses on defining source mixtures, developing field methods for characterization, quantifying transport processes and development of simulation modeling capabilities. Current research focuses on the following three areas:

Landfill Leachate in Alluvial Aquifers -- Norman, Oklahoma

Sewage Contamination in Sand and Gravel Aquifers -- Cape Cod, Massachusetts

Mixed, Low-level Radioactive and Other Wastes -- Amargosa Desert Research Site, Nevada

Program Headlines on Mixed Waste Contamination Research

Fact Sheets

Meetings and Conferences

New Publications

Upcoming Publications

  • Monitoring the removal of phosphate from ground water discharging through a pond-bottom permeable reactive: McCobb, T.D., LeBlanc, D.R., and Massey, A.J., Ground Water Monitoring and Remediation (IN PRESS).
  • Soil-CO2 flux in an arid environment--A multiple year study: Riggs, A.C., Stannard, D.I., Maestas, F., Karlinger, M., and Striegl, R.G., U.S. Geological Survey Scientific Investigations Report (IN PRESS).
  • The relative importance of abiotic and biotic transformation of carbon tetrachloride in anaerobic soils and sediments: Shao, H., and Butler, E.C., Soil and Sediment Contamination--An International Journal (IN PRESS).
  • Use of inverse modeling methods to improve ground-water-modeling calibration and evaluate model-prediction uncertainty, Camp Edwards, Cape Cod, Massachusetts: Walter, D.A., and LeBlanc, D.R., U.S. Geological Survey Scientific Investigations Report 2007-5257 (IN PRESS).
  • Transport of tritium contamination from the shallow unsaturated zone to the atmosphere in an arid environment: Garcia, C.A., Andraski, B.J., Stonestrom, D.A., Cooper, C.A., Johnson, M.J., Michel, R.L., and Wheatcraft, S.W., Vadose Zone Journal, v. 8, no. 2 (IN PRESS).

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