Jump to main content.


Resume for Dale Werkema

D. Dale Werkema, Jr., Ph.D.

Education
Ph.D. in Geology - emphasis Geophysics, 2002, Western Michigan University
Master of Science in Geology - emphasis Geophysics, 1998, Western Michigan University
Bachelor of Science in Geology, 1995, Wayne State University

Federal Training

Simplified Acquisition, CPR AED & First Aid, Contract Officer Representative (COR), Inter-Agency Agreement/Program Officer (IAG/PO), Security, Quality Assurance, Records Management, OSHA 8 hour refresher

Employment

2002-present: United States Environmental Protection Agency; [werkema.d@epa.gov]. Office of Research and Development, National Exposure Research Laboratory, Environmental Sciences Division, Characterization and Monitoring Branch, Las Vegas, NV. Post-Doc Research Scientist specializing in geophysical methods applied to groundwater contamination and other environmental concerns. The specific project task focuses on research related to geophysical methods applied to NAPL contamination and remediation. Duties also include technical support and review of geophysical investigations through other EPA regions and/or offices

1998-2002: Geophysical Services International, L.L.C., Geophysical Consulting Services, Principal/Geophysicist; Projects include applying near surface geophysical methods to environmental, hydrogeologic and resource exploration investigations; Sites include those throughout Michigan, Indiana, and Brazil.

7/01-5/02: Hope College, Holland, MI.; Visiting Assistant Professor of Geological and Environmental Sciences; Courses taught: Hydrogeology, Surficial Geology, Regional Geology including a 10 day field trip to Death Valley, CA. and select areas in Utah, Physical Geology and Atmospheric Science; Advisor for undergraduate research in geoelectrical properties at a LNAPL contaminated site.

9/99-4/00: Western Michigan University, Department of Geosciences; Instructor, Geology 222, Ocean Systems – Technology and Resources.

Spring 1998 & 2000: Western Michigan University Department of Geosciences; Teaching Assistant Field Geophysics Course, Geol 563; field assistant, equipment manager and technician, field survey, processing and interpretation instructor.

Summer 1997, 1998 & 2000: Western Michigan University Geology Department; Hydrogeology Field Camp Teaching Assistant, head TA during Geophysics week and assistant TA during subsequent weeks (drilling, aquifer analysis, and sampling).

1/99-8/99: Western Michigan University, Department of Geosciences;-Research Assistant, Geophysical Investigation of a Hydrocarbon Impacted Area in Carson City, MI, Funding agency: Petroleum Research Fund

1/99-4/99: University of Michigan, Department of Civil Engineering; Laboratory Instructor, Introduction to Applied Geophysics

Fall 1997 & Fall 1998: Western Michigan University Geology Department; Geology 560, Introduction to Geophysics Teaching Assistant

9/95-4/99: Western Michigan University Geology Department; Teaching Assistant Geology 130 Laboratory

1/94-5/95: Wayne State University Geology Department, -Student Assistant for Geology 101

Publications

Peer Reviewed

Schmutz, M., A. Revil, P. Vaudelet, M. Batzle, P. Vinao, and D. D. Werkema. Influence of Oil Saturation Upon Spectral Induced Polarization of Oil Bearing Sands. JOURNAL OF GEOPHYSICAL RESEARCH. American Geophysical Union, Washington, DC, (183):211-224, (2011). Published 2/14/11.

Abdel Aal, G. Z., E. A. Atewana, S. Rossbach, and D. D. Werkema. Sensitivity of Geoelectrical Measurements to the Presence of Bacteria in Porous Media. Journal of Geophysical Research - Biogeosciences. American Geophysical Union, Washington, DC, 115:1-11, (2011). Published 2/9/11.

Werkema, D. D., M. Jackson, and. R. Glaser. The Environmental Geophysics Web Site and Geophysical Decision Support System (GDSS). U.S. Environmental Protection Agency, Washington, DC, EPA/600/C-10/004, 2010. Published 9/28/2010.

Werkema, D. D., D. R. Glaser, R. Joyce, D. Hawkins, E. Atekwana, and G. Z. Abdel Aal. A Feasibility Study on the Geophysical Response to Nanoparticles in the Subsurface. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-10/105, 2010. Published 9/21/2010.

Davis, C. A., L. J. Pyrak-Nolte, E. A. Atekwana, D. D. Werkema, and M. E. Haugen. Acoustic and Electrical Property Changes Due to Microbial Growth and Biofilm Formation in Porous Media . Journal of Geophysical Research - Biogeosciences. American Geophysical Union, Washington, DC, 115:1-14, (2010). PUBLISHED 07/16/2010.

Davis, C. A., L. J. Pyrak-Nolte, E. A. Atekwana, D. D. Werkema, and M. E. Haugen. Microbial-Induced Heterogeneity in the Acoustic Properties of Porous Media . GEOPHYSICAL RESEARCH LETTERS. American Geophysical Union, Washington, DC, 36:21405-21410, (2009). PUBLISHED 12/01/2009.

Vukenkeng, C., E. Atekwana, E. Atekwana, W. Sauck, and D. D. Werkema. TEMPORAL GEOPHYSICAL SIGNATURES DUE TO CONTAMINANT SOURCE REDUCTION. GEOPHYSICS. Society of Exploration Geophysicists, 74(4):1-11, (2009). PUBLISHED 8/25/2009.

ALLEN, J., E. ATEKWANA, E. ATEKWANA, J. DURIS, D. D. WERKEMA, AND S. ROSSBACH. "Changes in Microbial Community Structure of Petroleum Contaminated Sediments Are Reflected in Geophysical Signatures. APPLIED AND ENVIRONMENTAL MICROBIOLOGY. American Society for Microbiology, Washington, DC, 73(9):2860-2870, (2007). Published 5/1/2007

Total Dissolved Solids in Groundwater and its Relationship to Electrical Conductivity of Sediments Contaminated with Hydrocarbon, Eliot A. Atekwana, Estella A. Atekwana, Rebecca S. Rowe, D. Dale Werkema Jr., and Franklyn D. Legall, Journal of Applied Geophysics, In review.

In Situ Apparent Resistivity Measurements and Microbial Population Distribution at a Hydrocarbon Contaminated Site: Implications for Assessing Natural Attenuation, Estella A. Atekwana, D. Dale Werkema, Jr., Joseph W. Duris, Silvia Rossbach, Eliot A. Atekwana, William A. Sauck, and Daniel P. Cassidy, Geophysics, 2004 In press.

Investigating the Geoelectrical Response of Hydrocarbon Contamination Undergoing Biodegradation, D. Dale Werkema Jr., Estella a. Atekwana, Anthony Endres, William A. Sauck and Daniel P. Cassidy, Geophysical Research Letters, Vol. 30, No. 12, 1647, doi:10.1029/2003GL017346, 2003.

Geoelectrical Response of an Aged LNAPL Plume: Implications For Monitoring Natural Attenuation, Douglas D. Werkema Jr., Ph.D. Dissertation, Western Michigan University Waldo Library, 2002.

Geophysical Investigation of Vadose Zone Conductivity Anomalies at a Hydrocarbon Contaminated Site: Implications for the Assessment of Intrinsic Bioremediation, Estella A. Atekwana, William A. Sauck, Gamal Zidon Abdel Aa , and D. Dale Werkema, Jr., Journal of Environmental and Engineering Geophysics, September 2002, Vol 7, Issue 3, p. 102-111.

In Situ Rhamnolipid Production At An Abandoned Petroleum Refinery, Daniel P. Cassidy, Andrew J. Hudak, D. Dale Werkema, Jr. , Estella A. Atekwana, Silvia Rossbach, Joseph W. Duris, Eliot A. Atekwana, and William A. Sauck, Journal of Soil and Sediment Contamination, 2002, 11(5), p. 769-787.

The Effects of LNAPL Biodegradation Products on Electrical Conductivity Measurements, Daniel P. Cassidy, D. Dale Werkema, Jr. , William Sauck, Estella Atekwana, Silvia Rossbach, and Joe Duris, Journal of Environmental and Engineering Geophysics, March 2001, Vol. 6, Issue 1, pp. 47-52.

A Generic Automated/Semi-Automated Digital Multi-Electrode Instrument for Field Resistivity Measurements, Douglas D. Werkema Jr., Johnson A. Asumadu, Estella Atekwana and William Sauck, IEEE Transactions on Instrumentation and Measurement, Dec 2000, vol. 49, No. 6, p.1249.

Investigations of Geoelectrical Signatures at a Hydrocarbon Contaminated Site, Estella A. Atekwana, William A. Sauck, Douglas D. Werkema Jr., Journal of Applied Geophysics, May 2000, Vol. 44/2-3,p. 167-180.

A Versatile Windows Based Multi-Electrode Acquisition System for DC Electrical Methods Surveys, Douglas D. Werkema Jr., Estella Atekwana, William Sauck, Johnson Asumadu, Environmental Geosciences, Dec. 1998, p.196- 206.

A Generic Multi-Electrode Automated/Semi-Automated Field Resistivity System, Douglas Dale Werkema Jr., M.S. Thesis, Western Michigan University Waldo Library, April, 1998.

Conference Proceedings and Abstracts

Laboratory and field results linking high conductivities to the microbial degradation of petroleum hydrocarbons, Werkema, D.D., Atekwana, E.A., Atekwana, E., Duris, J., Rossbach, S., Allen, J., Smart, L., Sauck, W.A., Proceedings of the Symposium on the Applications of Geophysics to Environmental and Engineering Problems 2004, Colorado Springs, CO., In press.

Column experiments and anomalous conductivity in hydrocarbon-impacted sands; Laura A. Sherrod, D. Dale Werkema, William A. Sauck, Estella A. Atekwana, Silvia Rossbach, and Eliot A. Atekwana; Eighth International Congress of the Brazilian Geophysical Society, Rio de Janeiro, Brazil, 2003.

Geoelectrical Stratigraphy and Analysis of a Hydrocarbon Impacted Aquifer, D. Werkema Jr., E. Atekwana, A. Endres, and W. Sauck, Joint Assembly of AGU, EUG, Nice France, Spring Meeting 2003.

Microbial Community Structure in a Shallow Hydrocarbon–Contaminated Aquifer Associated with High Electrical Conductivity, J. W. Duris, S. Rossbach, E.A. Atekwana , D. Werkema Jr., Joint Assembly of AGU, EUG, Nice France, Spring Meeting 2003.

Outburst Origin For The Central Kalamazoo River Valley? Geophysical Transect Results, William A. Sauck, Andrew L. Kozlowski, D. Dale Werkema, GSA Eastern Section Abstracts, April 2002.

Temporal And Spatial Variability Of High Resolution In Situ Vertical Apparent Resistivity Measurements At A LNAPL Impacted Site, D. Dale Werkema Jr., Estella A. Atekwana, Anthony Endres, William A. Sauck, Proceedings of the Symposium on the Applications of Geophysics to Environmental and Engineering Problems, 2002, 13ESC4.

Shifts in Microbial Community Structure in Hydrocarbon Impacted Sediments Associated with Alterations in Physical Parameters of Soil, Duris, J.W. Werkema, D. D., Davis, J., Eversole, R., Beuving, L., Atekwana E., and Rossbach S. Abstracts: American Society for Microbiology 101st General Meeting. ASM Press, Washington, D.C. 2001, p.655

Field and Laboratory Studies of the Anomalous Electrical Conductivity Zones Associated with LNAPL Contamination in Michigan, Werkema, D., and Sauck, W., AAPG Eastern Section 2001 Abstracts, Fall 2001.

The Michigan Basin is Thermal in Origin, Kominz, Michelle A., Werkema, D., Barnes, D., Harrison III, W., Kirwan, E. Malin, M., AAPG Eastern Section 2001 Abstracts, Fall 2001.

Anomalous Conductivity in Hydrocarbon Spill Zones - New Extensions to the WMU Model, Sauck, W., Atekwana, A., Werkema, D., Cassidy, D., European Geophysical Society XXVI General Assembly, Nice, France, 25-30 March 2001.

Changes in Geoelectrical Properties Accompanying Microbial Degradation of LNAPL, Estella A. Atekwana, Daniel P. Cassidy, Charlie Magnuson, Anthony L. Endres, D. Dale Werkema Jr. , William A. Sauck, Proceedings of the Symposium on the Applications of Geophysics to Environmental and Engineering Problems, 2001, OCS-1.

Geophysical Investigation of Vadose Zone Conductivity Anomalies at a Former Refinery Site, Kalamazoo, MI.,Gamal Zidon Abdel Aal, D. Dale Werkema, Jr., William A. Sauck, Estella A. Atekwana, Proceedings of the Symposium on the Applications of Geophysics to Environmental and Engineering Problems, 2001, VZC-4.

Microbial Communities and Their Effects on Silica Structure & Geophysical Properties in Hydrocarbon Impacted Sediments, Duris, J.W., Werkema, D.D., Atekwana, E., Eversole, R., Beuving, L., Rossbach, S., Geological Society of America Annual Meeting Abstracts, Reno, NV., 2000, vol. 32, no. 7, p A190.

Multi-Method Geophysical Profile of the Glacial Stratigraphy within the Kalamazoo River Valley NW Kalamazoo County, MI., Werkema, D.D., Kozlowski, A.L., Bird, B.C., Sauck, W.A., Kehew, A.E., Geological Society of America Annual Meeting Abstracts, Reno, NV., 2000, vol. 32, no. 7, p. A-19.

Vertical Distribution of Microbial Abundances and Apparent Resistivity at an LNAPL Spill Site, D. Dale Werkema Jr., Estella Atekwana, William Sauck, Siliva Rossbach and Joe Duris, Proceedings of the Symposium on the Applications of Geophysics to Environmental and Engineering Problems, 2000, pp. 669-678.

Geophysical Investigations of a Landfill and its Associated Plume, Bailey, J.M., Groncki, J.D., Atekwana E.A., Sauck, W.A., Werkema, D.D., Proceeding of the Symposium on the Applications of Geophysics to Environmental and Engineering Problems, 1999.

Characterization of a Complex Refinery Groundwater Contamination Plume Using Multiple Geoelectric Methods, Estella A. Atekwana, William A. Sauck, D. Dale Werkema Jr., Proceedings of the Symposium on the Applications of Geophysics to Environmental and Engineering Problems, 1998.

Phone: (702) 798-2263
Fax:     (702) 798-2107
email: Dale Werkema   werkema.d@epa.gov

Characterization and Monitoring Home Page
Environmental Sciences | Research & Development
National Exposure Research Laboratory
Send questions or comments to Steve Gardner
Email: gardner.steve@epa.gov


Local Navigation


Jump to main content.