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See all EPA publications for Douglas Werkema Include records from any EPA source

Records 26 to 50 of 78 records from [ORD-NERL] from author Douglas Werkema

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2011

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).

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).

Personna, Y. R., L. D. Slater, D. Ntarlagiannis, D. D. WERKEMA, AND Z. Szabo. Spectral Induced Polarization Signatures of Ethanol in Sand-Clay Medium. Presented at Second International Workshop on Induced Polarization in Near-Surface Geophysics, Golden, CO, October 31 - November 02, 2011.

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.

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).

Hawkins, D., M. Mcguire, G. Z. Abdel Aal, E. A. Atekwana, AND D. D. WERKEMA. Laboratory Assessment of Nano-Silver Transport in Sand Columns Using Complex Conductivity Measurements. Presented at Symposium on the Applications of Geophysics to Environmental and Engineering Problems, Keystone, CO, April 11 - 15, 2010.

WERKEMA, D. D., M. JACKSON, AND D. 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.

2009

Davis, C. A., L. J. Pyrak-Nolte, E. A. Atekwana, AND D. D. WERKEMA. Acoustic Wave Monitoring of Biofilm Development in Porous Media. Presented at American Geophysical Union Spring Joint Assembly Meeting, Toronto, QC, CANADA, May 24 - 27, 2009.

Henderson, R. D., D. D. WERKEMA, R. J. Horton, AND J. W. Lane. Broadband Geoelectrical Signatures of Water and Ethanol Solutions in Ottawa Sand. Presented at American Geophysical Union Fall 2009 Conference, Las Vegas, NV, December 14 - 18, 2009.

Henderson, R. D., D. D. WERKEMA, R. J. Horton, AND J. W. Lane. Broadband Geoelectrical Signatures of Water-Ethanol Solutions in Ottawa Sand. Presented at American Geophysical Union Fall 2009 Meeting, San Francisco, CA, December 14 - 18, 2009.

Rajabdeen, N., B. Luke, AND D. D. WERKEMA. Detecting Seismic Characteristics of Select Engineered Nanomaterials in Granular Media. Presented at UNLV Civil Engineering Department, Las Vegas, NV, November 02, 2009.

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).

WERKEMA, D. D., R. Joyce, AND E. Atekwana. Preliminary Results from a Feasibility Study of the Geoelectrical Response to Select Nanomaterials in a Sand Matrix. Presented at NCER Nano Grantees Meeting, Las Vegas, NV, November 09, 2009.

Davis, C. A., L. J. Pyrak-Nolte, E. A. Atekwana, D. D. WERKEMA, AND M. E. Haugen. Spatial & Temporal Geophysical Monitoring of Microbial Growth and Biofilm Formation. Presented at American Geophysical Union Fall 2009 Conference, Las Vegas, NV, December 14 - 18, 2009.

Davis, C. A., L. Pyrak-Nolte, E. Atekwana, D. D. WERKEMA, M. Haugen, AND D. R. Glaser. Spatial and Temporal Geophysical Monitoring of Microbial Growth and Biofilm Formation. Presented at American Geophysical Union Fall 2009 Meeting, San Francisco, CA, December 14 - 18, 2009.

Vukenkeng, C., E. Atekwana, E. Atekwana, W. Sauck, AND D. D. WERKEMA. Temporal Geophysical Signatures Due to Contaminant Mass Remediation . GEOPHYSICS. Society of Exploration Geophysicists, 74(4):1-11, (2009).

2008

Joyce, R., C. Vukenkeng, E. Atekwana, E. Atekwana, D. D. WERKEMA, S. Rossbach, G. Abdel, C. Davis, AND J. Nolan. TEMPORAL GEOPHYSICAL INVESTIGATIONS OF THE FT-2-PLUME AT THE WURTSMITH AIR FORCE BASE, OSCODA, MICHIGAN. Presented at Symposium on the Applications of Geophysics to Environmental and Engineering Problems, Philadelphia, PA, April 06 - 10, 2008.

Joyce, R., D. D. WERKEMA, E. Atekwana, AND E. Atekwana. COMPLEX CONDUCTIVITY RESPONSE TO NANOMATERIALS IN A SAND MATRIX. Presented at American Geophysical Union Fall Annual Meeting, San Francisco, CA, December 15, 2008.

Joyce, R., D. D. WERKEMA, E. A. Atekwana, AND E. A. Atekwana. Complex Conductivity Response to Nanomaterials in a Sand Matrix . Presented at American Geophysical Union Fall Annual Meeting, San Francisco, CA, December 14 - 18, 2008.

Magill, M. T., D. D. WERKEMA, AND D. K. Kreamer. GEOELECTRICAL MEASUREMENTS OF COMMON SEAR SURFACTANTS IN ANALOG AQUIFER MATERIALS. Presented at UNLV Geosymposium, Las Vegas, NV, April 25, 2008.

Vukenkeng, C., E. A. Atekwana, E. A. Atekwana, S. Rossback, W. A. Sauck, D. D. WERKEMA, J. Nolan, AND L. Slater. GEOPHYSICAL AND GEOCHEMICAL ATTENUATED SIGNATURES ASSOCIATED WITH A HYDROCARBON CONTAMINATED SITE UNDERGOING BIOREMEDIATION. Presented at Society of Exploration Geophysicist Annual Meeting, Las Vegas, NV, November 10 - 14, 2008.

Davis, C. A., L. J. Pyrak, E. A. Atekwana, M. E. Haugen, AND D. D. WERKEMA. INVESTIGATING THE EFFECT OF MICROBIAL GROWTH AND BIOFILM FORMATION ON SEISMIC WAVE PROPAGATION IN POROUS MEDIA. Presented at American Geophysical Union Chapman Conference on Biogeophysics, Portland, MA, October 13 - 16, 2008.

Davis, C., L. Pyrak-Nolte, E. Atekwana, M. Haugen, AND D. D. WERKEMA. INVESTIGATING THE EFFECT OF MICROBIAL GROWTH AND BIOFILM FORMATION ON SEISMIC WAVE PROPAGATION IN SEDIMENT. Presented at American Geophysical Union Chapman Conference on Biogeophysics, Portland, MA, October 13 - 16, 2008.

WERKEMA, D. D. REPORT ON THE GEOELECTRICAL DETECTION OF SURFACTANT ENHANCED AQUIFER REMEDIATION OF PCE: PROPERTY CHANGES IN AQUEOUS SOLUTIONS DUE TO SURFACTANT TREATMENT OF PERCHLOROETHYLENE: IMPLICATIONS TO GEOPHYSICAL MEASUREMENTS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-08/031, 2008.

Magill, M., D. D. WERKEMA, AND D. Kreamer. Spectral Induced Polarization Response of Unconsolidated Saturated Sand and Surfactant Solutions. Presented at American Geophysical Union Fall Annual Meeting, San Francisco, CA, December 15, 2008.