Program Affiliations

• Department of Soil Science

Education

• B.A. Geochemistry, 1994, Pomona College, Claremont, CA
• M.S. Soil Science, 1999, University of California-Berkeley

Research and Outreach Overview

Geoff began working with the UWEX state soil specialists at UW Madison in early 2014 as an outreach specialist. His research to date has focused on contaminant behavior and impacts in soil, sediment and water with a strong emphasis on stakeholder driven projects at the interface of science and policy. Currently he is working on projects involving soil lead in urban and rural areas, developing statewide anthropogenic polycyclic aromatic hydrocarbon baseline values, and soil denitrification of cheese making and vegetable processing wastewater. In addition, Geoff has served as an author and trainer for the ITRC Bioavailability of Contaminants in Soil training as well as the primary author for the State of Global Pollution published by the UN FAO.

Publications

Siemering, G.S., Arriaga, F.J., Cagle, G., VanBeek, J.M., and Freedman, Z. 202X. A comparison of PLFA and 16S rRNA gene metabarcoding to resolve soil community change and predict cheese maker and vegetable processor land application system denitrification efficiency. In preparation.

Oke, O., Magzamen, S., Siemering, G.S., and Carter, E. 202x. Modeling of Combined Potential Lead Exposures from Disparate Sources in the Urban Environment. In preparation.

Siemering, G.S., Vanderleest, C., Naatz, S., and Arriaga, F.J. 2022 Denitrification Efficiency of Land Treatment Systems for Cheese Making and Vegetable Processing Facilities. Submitted Royal Society of Chemistry: Environmental Advances.

Siemering G.S., Vanderleest C.P., Arriaga F.J. Autonomous high-throughput in situ soil nitrogen flux measurement system. Environmental Monitoring and Assessment. 2022 Oct;194(10):680.

Siemering, G.S. and Thiboldeaux, R., 2021. Background concentration, risk assessment and regulatory threshold development: Polycyclic aromatic hydrocarbons (PAH) in Milwaukee, Wisconsin surface soils. Environmental Pollution, 268, p.115772.

Plunkett, S.A., Wijayawardena, M.A., Naidu, R., Siemering, G.S., Tomaszewski, E.J., Ginder-Vogel, M. and Soldat, D.J., 2018. Use of Routine Soil Tests to Estimate Pb Bioaccessibility. Environmental Science & Technology, 52(21), pp.12556-12562.

Geoffrey S. Siemering, Jennifer D. Hayworth, Ben K. Greenfield. 2008. Assessment of Potential Aquatic Herbicide Impacts to California Aquatic Ecosystems. Archives of Environmental Contamination and Toxicology 55(3): 415-431

Ben K. Greenfield, Geoffrey S. Siemering, Joy C. Andrews, Michael Rajan, Stephen P. Andrews, Jr., and David F. Spencer. 2007. Mechanical Shredding of Water Hyacinth (Eichhornia crassipes): Impacts to Water Quality in the Sacramento-San Joaquin River Delta, California. Estuaries and Coasts30: 627-640.

Siemering, Geoff. 2006. Technical Report for the Interagency Ecological Program (IEP) Pelagic Organism Decline (POD) Workgroup: Tier 1 Risk Assessment of California Department of Boating and Waterways Aquatic Herbicide Use in the Sacramento-San Joaquin River Delta. SFEI Contribution 436. San Francisco Estuary Institute, Oakland, CA.

Siemering, Geoff and Jennifer Hayworth. 2006. Aquatic Herbicides: Overview of Usage, Fate and Transport, Potential Environmental Risk, and Future Recommendations for the Sacramento-San Joaquin Delta and Central Valley. White Paper for the Interagency Ecological Program. SFEI Contribution 414. San Francisco Estuary Institute, Oakland, CA.

Nicole David, Ben K. Greenfield, Geoffrey S. Siemering. 2006. Evaluating Impacts of Lake Maid Plant Control. Journal of Aquatic Plant Management 44: 60-67.

Lingtian Xie, Kelly Thrippleton, Mary Ann Irwin, Geoffrey S. Siemering, David Crane, Kevin Berry, and Daniel Schlenk. 2005. Evaluation of Estrogenic Activities of Aquatic Herbicides and Surfactants Using a Rainbow Trout Vitellogenin Assay. Toxicological Sciences 87: 391-398.

Allen, P.G., G.S. Siemering, D.K. Shuh, J.J. Bucher, N.M. Edelstein, C.A. Langton, S.B. Clark, T. Reich and M.A. Denecke. 1997. Technetium Speciation in Cement Waste Forms Determined by X-ray Absorption Fine Structure Spectroscopy. Radiochimica Acta, 76: 77-86.

Extension Publications

Geoff Siemering, John B. Peters, and Doug Soldat. 2015. Sampling lawn and garden soils for analysis (A2166). University of Wisconsin Extension, Madison, WI.

Geoffrey Siemering and Doug Soldat. 2015. Lead in home garden soil (A4089). University of Wisconsin Extension, Madison, WI.

Geoffrey Siemering and Doug Soldat. 2015. Reducing exposure to lead in your garden soil (A4088). 2015. University of Wisconsin Extension, Madison, WI.

John Folstad, Sharon C Long, Doug Soldat, and Geoff Siemering. 2015. Soil contaminants in community gardens (A3905-03). University of Wisconsin Extension, Madison, WI.