Ph.D. Student Profile: Jay L. Clausen, PG, CPG
Degree: Earth and Environmental Science
Research Topic: Modifications to Sample Collection and Processing Procedures for Soil Containing Metal Particulates
Advisor: Dr. Kevin Gardner
Description of Research
The proposed dissertation will assess modifications to field sampling and sample processing procedures to obtain a representative sample for soils containing metal particulates. The field issues to be studied include the need for multi-increment samples versus the traditional grab/discrete sampling approach. If multi-increment sampling is warranted, the optimum number of increments per sample will be determined. Sample processing issues to be studied include 1) the appropriateness of field splitting to reduce the sample volume sent to the analytical laboratory, 2) identification of the appropriate soil size class for analysis, 3) the necessity of machining/grinding of the soil sample to increase the number of contaminant particles in the sample to reduce heterogeneity effects, 4) the appropriate type of grinding apparatus, 5) the appropriate grinding interval, 6) assessment of the need to increase the digested mass and digestion interval, 7) the optimum soil to acid ratio, i.e. digestion efficiency, 8) the need for subsampling to build the digestate sample, e.g. multi-increment, sectorial splitting, 1-D or 2-D Japanese Slab Cake, and 9) the necessity for specific digestion procedures for those metals with poor recovery with the existing USEPA Method, e.g. antimony, tungsten. The optimum field sampling and sample processing procedures will be identified and submitted to the USEPA as a proposed method modification to USEPA Method 3050B. The other aspect of the dissertation will evaluate the effects of the grinding process of the multi-increment sampling methodology on toxicity and bioaccumulation of organics and metals on two common employed test organisms.
Selected Previous Awards and Activities
- 2008/09, US Army ERDC Doctoral Program Fellowship
- 2007, Invited Speaker for the Society of Environmental Toxicology and Chemistry Conference
- 2006, Session Co-Chair for the Joint Services Environmental Management Conference,
- 2004, Keynote Speaker for Strategic Environmental Research and Development Program/Environmental Security Technology Certification Program Conference
Selected Presentations and Publications
- Clausen, J.L., C. Scott, N. Mulherin, G. Gooch, S. Bigl, and I. Osgerby. 2011. Fate of nitroglycerin and dinitrotoluene in soil at a small arms training range. Soil and Sediment Contamination Journal: An International Journal. 20(6):649-671.
- Clausen, J. L., B. Bostick, and N. Korte. 2011. Migration of lead in surface water, pore water and ground water with emphasis on firing ranges. Critical Reviews in Environmental Science & Technology. 41(15)1397-1448.
- Clausen, J.L., J. Kaste, M. Ketterer, and N. Korte. 2010. Sample preparation and digestion considerations for determining metal deposition at small arms ranges. International Journal of Environmental Analytical Chemistry. 90(12):903-921.
- Clausen, J.L., M. Ketterer, A. J. Bednar, and M. Koenig. 2010. Challenges and successes in using inductively coupled plasma mass spectrometry for measurements of tungsten in environmental water and soil samples. International Journal of Environmental Analytical Chemistry. 90(10):773-783.
- Bennett, E.R., J.L. Clausen. Linkov, and E. Linkov. 2009. Predicting physical properties of emerging compounds with limited physical and chemical data: QSAR model uncertainty and applicability to military munitions. Chemosphere. 77:1412-1418.
- Clausen, J. and N. Korte. 2009. The distribution of metals in soils and pore water at three U.S. military training facilities. Soil and Sediment Contamination Journal: An International Journal. 18(5):546-563.
- Clausen, J. L. and N. Korte. 2009. Environmental fate of tungsten from military use. The Science of the Total Environment. 407(8):2887-2893.
- Clausen, J.L., R. Cramer, S. Clough, P. Gwinn, and M. Gray. 2009. Assessing the sensitivity of quantitative structural activity analysis models for evaluating new military compounds. Water, Air and Soil Pollution. 202(1):141-147. http://www.springerlink.com/content/f63k2m05445j1161/fulltext.pdf
- PhD, Natural Resources and Earth Systems Sciences, Univ. of New Hampshire, In Progress.
- M. S., Geological Sciences, University of Maine, 1990, Thesis: The Geochemistry of Groundwater in Maine.
- B. S., Geology, University of Nebraska at Omaha, 1987, Thesis: Chemical Characterization of Soils in the Spruce-Fir Zone of North Carolina.
- 2005-Present: Research Physical Scientist, US Army Corps of Engineers, Engineer Research and Development Center, Cold Regions Research and Engineering Laboratory, Hanover, NH
- 1997-2005: Senior Hydrogeologist/Project Manager, AMEC Earth and Environmental, Inc. Westford, MA
- 1990–1997: Senior Hydrogeologist/Project Manager, Lockheed, Paducah, KY