Rob Mackley

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Biography
Rob has been with PNNL since 2004. His career has focused around the technical areas of groundwater and remediation monitoring, remedy development and implementation, and hydrogeologic characterization. He specializes in aquifer hydraulic testing, advanced groundwater and vadose zone monitoring instrumentation, and remedy performance monitoring and evaluation.
One of his favorite areas of research is the interaction of surface and groundwater. Rob has provided technical oversight of groundwater, surface water, and subsurface sediment sampling. He has overseen the drilling, design, and completion of groundwater wells. He also enjoys software programming and working with lab and field instrumentation. He is the proud father of four boys. He enjoys coaching them in sports and exposing them to the adventures of the outdoors.
Research Interests
- Groundwater-surface water interaction
- Hydrogeologic characterization
- Aquifer and well testing
- Groundwater remediation
- Environmental monitoring
- Sensors and field instrumentation
Education and Credentials
- M.S., Geology, Utah State University, 2005
- B.S., Geology, Utah State University, 2001
Awards and Recognitions
- PNNL Outstanding Performance Award, 2005, 2006, 2007, 2012
PNNL Publications
2023
- Song X., H. Ren, Z. Hou, X. Lin, M. Karanovic, M.J. Tonkin, and V.L. Freedman, et al. 2023. "Predicting Future Well Performance for Environmental Remediation Design using Deep Learning." Journal of Hydrology 617, no. Part C:Art. No. 129110. PNNL-SA-178074. doi:10.1016/j.jhydrol.2023.129110
2021
- Mackley R.D., J.M. Torgeson, J.L. Robinson, N. Qafoku, M.L. Rockhold, and J.N. Thomle. 2021. Evaluation of a Potential Groundwater Tracer Test in the Ringold Upper Mud Aquifer at the 100-H Area of the Hanford Site. PNNL-32103. Richland, WA: Pacific Northwest National Laboratory. Evaluation of a Potential Groundwater Tracer Test in the Ringold Upper Mud Aquifer at the 100-H Area of the Hanford Site
- Szecsody J.E., N. Qafoku, A.R. Lawter, R.D. Mackley, H.P. Emerson, and C.T. Resch. 2021. Laboratory Evaluation to Increase Effectiveness of Field-Scale Soil Flushing in the Hanford 100 Areas. PNNL-31980. Richland, WA: Pacific Northwest National Laboratory. Laboratory Evaluation to Increase Effectiveness of Field-Scale Soil Flushing in the Hanford 100 Areas
2020
- Mackley R.D., V.A. Garayburu-Caruso, V.L. Freedman, and K.M. Engbrecht. 2020. Hydrologic Evaluation of the Ringold Upper Mud Aquifer in the 100-H Area of the Hanford Site. PNNL-30467. Richland, WA: Pacific Northwest National Laboratory. Hydrologic Evaluation of the Ringold Upper Mud Aquifer in the 100-H Area of the Hanford Site
- Robinson J.L., R.D. Mackley, M.L. Rockhold, T.C. Johnson, J.N. Thomle, C.D. Johnson, and P. Jaysaval. 2020. Geophysical Methods for Stratigraphic Identification. PNNL-29182 Rev 1.0. Richland, WA: Pacific Northwest National Laboratory. Geophysical Methods for Stratigraphic Identification
- Rockhold M.L., X. Song, Z. Zhang, N. Qafoku, M.A. Jensen, J.L. Downs, and J.D. Tagestad, et al. 2020. Spatiotemporal Analyses of Groundwater and Shoreline Cr(VI) Concentrations in the 100 Areas at Hanford. PNNL-30483. Richland, WA: Pacific Northwest National Laboratory. Spatiotemporal Analyses of Groundwater and Shoreline Cr(VI) Concentrations in the 100 Areas at Hanford
- Szecsody J.E., C.E. Bagwell, R.D. Mackley, and S.D. Hoyle. 2020. Evaluation of Ammonia Discharge into PUREX Crib 216-A-37-1 and Nitrogen Species Fate in the Subsurface. PNNL-29999. Richland, WA: Pacific Northwest National Laboratory. Evaluation of Ammonia Discharge into PUREX Crib 216-A-37-1 and Nitrogen Species Fate in the Subsurface
- Szecsody J.E., H.P. Emerson, R.D. Mackley, C.T. Resch, B.N. Gartman, C.I. Pearce, and S.A. Saslow, et al. 2020. Evaluation of the Change in Uranium Mobility in Sediments from the Hanford 300-FF-5 Stage B Polyphosphate Field Injection. PNNL-29650. Richland, WA: Pacific Northwest National Laboratory. Evaluation of the Change in Uranium Mobility in Sediments from the Hanford 300-FF-5 Stage B Polyphosphate Field Injection
2019
- Hou Z., T.D. Scheibe, C.J. Murray, W.A. Perkins, E.V. Arntzen, H. Ren, and R.D. Mackley, et al. 2019. "Identification and mapping of riverbed sediment facies in the Columbia River through integration of field observations and numerical simulations." Hydrological Processes 33, no. 8:1245-1259. PNNL-SA-123667. doi:10.1002/hyp.13396
- Johnson T.C., J.N. Thomle, J.L. Robinson, R.D. Mackley, and M.J. Truex. 2019. Stage B Uranium Sequestration Amendment Delivery Monitoring Using Time-Lapse Electrical Resistivity Tomography. PNNL-28619. Richland, WA: Pacific Northwest National Laboratory. Stage B Uranium Sequestration Amendment Delivery Monitoring Using Time-Lapse Electrical Resistivity Tomography
- Johnson T.C., M.J. Truex, J.N. Thomle, R.D. Mackley, S.D. Springer, S. Mehta, and D.J. Becker, et al. 2019. "Integration of Real-Time Geophysical Monitoring with In Situ Uranium Remedy Implementation." In Proceedings of the 45th Annual Waste Management Conference (WM2019): Encouraging Young Men & Women to Achieve Their Goals in Radwaste Management, March 3-7 2019, Phoenix, AZ, Paper No. 19094. Tempe, Arizona:WM Symposia. PNNL-SA-139290.
- Robinson J.L., R.D. Mackley, M.L. Rockhold, T.C. Johnson, and P. Jaysaval. 2019. Geophysical Methods for Stratigraphic Identification. PNNL-29182. Richland, WA: Pacific Northwest National Laboratory. Geophysical Methods for Stratigraphic Identification
2018
- Strickland C.E., M.J. Truex, R.D. Mackley, and T.C. Johnson. 2018. Deep Vadose Zone Monitoring Strategy for the Hanford Central Plateau. PNNL-28031. Richland, WA: Pacific Northwest National Laboratory. Deep Vadose Zone Monitoring Strategy for the Hanford Central Plateau
- Strickland C.E., R.D. Mackley, V.R. Vermeul, R.E. Clayton, J.N. Thomle, and B.Q. Roberts. 2018. Advanced Monitoring Systems for Deep Vadose Zone Applications Interim Status Report. PNNL-28038. Richland, WA: Pacific Northwest National Laboratory. Advanced Monitoring Systems for Deep Vadose Zone Applications Interim Status Report
2017
- Zhou T., M. Huang, J. Bao, Z. Hou, E.V. Arntzen, R.D. Mackley, and A.R. Crump, et al. 2017. "A New Approach to Quantify Shallow Water Hydrologic Exchanges in a Large Regulated River Reach." Water 9, no. 9:703. PNNL-SA-123562. doi:10.3390/w9090703
2016
- Fritz B.G., R.D. Mackley, and E.V. Arntzen. 2016. "Conducting Slug Tests in Mini-Piezometers." Groundwater 54, no. 2:291-295. PNNL-SA-105423. doi:10.1111/gwat.12335
- Olsen K.B., R.R. Kirkham, V.T. Woods, D.A. Haas, J.C. Hayes, T.W. Bowyer, and D.P. Mendoza, et al. 2016. "Noble Gas Migration Experiment to Support the Detection of Underground Nuclear Explosions." Journal of Radioanalytical and Nuclear Chemistry 307, no. 3:2603-2610. PNNL-SA-109064. doi:10.1007/s10967-015-4639-7
2015
- Mackley R.D., D.M. Anderson, J.N. Thomle, and C.E. Strickland. 2015. Technical and Economic Assessment of Solar Photovoltaic for Groundwater Extraction on the Hanford Site. PNNL-24741. Richland, WA: Pacific Northwest National Laboratory. Technical and Economic Assessment of Solar Photovoltaic for Groundwater Extraction on the Hanford Site
- Truex M.J., V.R. Vermeul, D. Adamson, M. Oostrom, L. Zhong, R.D. Mackley, and B.G. Fritz, et al. 2015. "Field Test of Enhanced Remedial Amendment Delivery Using a Shear-Thinning Fluid." Groundwater Monitoring and Remediation 35, no. 3:34-45. PNNL-SA-101736. doi:10.1111/gwmr.12101
2014
- Vermeul V.R., C.E. Strickland, P.D. Thorne, B.N. Bjornstad, R.D. Mackley, M.E. Kelley, and E.C. Sullivan, et al. 2014. "FutureGen 2.0 Monitoring Program: An Overview of the Monitoring Approach and Technologies Selected for Implementation." Energy Procedia 63. PNWD-SA-10395. doi:10.1016/j.egypro.2014.11.438
2013
- Carroll K.C., M.J. Truex, M.L. Brusseau, K.R. Parker, R.D. Mackley, and V.J. Rohay. 2013. "Characterization of Persistent Volatile Contaminant Sources in the Vadose Zone." Groundwater Monitoring and Remediation 33, no. 2:68-84. PNNL-SA-89088. doi:10.1111/gwmr.12006
- Freedman V.L., R.D. Mackley, S.R. Waichler, and J.A. Horner. 2013. "Evaluation of Analytical and Numerical Techniques for Defining the Radius of Influence for an Open-Loop Ground Source Heat Pump System." Journal of Hydrologic Engineering 18, no. 9:1170-1179. PNNL-SA-84739. doi:10.1061/(ASCE)HE.1943-5584.0000720
2012
- Freedman V.L., S.R. Waichler, R.D. Mackley, and J.A. Horner. 2012. "Assessing the Thermal Environmental Impacts of an Groundwater Heat Pump in Southeastern Washington State." Geothermics 42. PNNL-SA-76515. doi:10.1016/j.geothermics.2011.10.004
- Truex M.J., K.C. Carroll, V.J. Rohay, R.D. Mackley, and K.R. Parker. 2012. Treatability Test Report: Characterization of Vadose Zone Carbon Tetrachloride Source Strength Using Tomographic Methods at the 216-Z-9 Site. PNNL-21326. Richland, WA: Pacific Northwest National Laboratory. Treatability Test Report: Characterization of Vadose Zone Carbon Tetrachloride Source Strength Using Tomographic Methods at the 216-Z-9 Site
- Truex M.J., V.R. Vermeul, B.G. Fritz, R.D. Mackley, J.A. Horner, C.D. Johnson, and D.R. Newcomer. 2012. Investigation of Hexavalent Chromium Flux to Groundwater at the 100-C-7:1 Excavation Site. PNNL-21845; RPT-DVZ-AFRI-005. Richland, WA: Pacific Northwest National Laboratory. Investigation of Hexavalent Chromium Flux to Groundwater at the 100-C-7:1 Excavation Site
2011
- Fritz B.G., and R.D. Mackley. 2011. "Author's Reply: Discussion on 'A wet/wet differential pressure sensor for measuring vertical hydraulic gradient'." Groundwater 49, no. 6:782. PNNL-SA-74887. doi:10.1111/j.1745-6584.2011.00801.x
- Spane F.A., and R.D. Mackley. 2011. "Removal of River-Stage Fluctuations from Well Response Using Multiple-Regression." Groundwater 49, no. 6:794-807. PNNL-SA-74458. doi:10.1111/j.1745-6584.2010.00780.x
- Truex M.J., T. Macbeth, V.R. Vermeul, B.G. Fritz, D.P. Mendoza, R.D. Mackley, and T.W. Wietsma, et al. 2011. "Demonstration of Combined Zero-Valent Iron and Electrical Resistance Heating for In Situ Trichloroethene Remediation." Environmental Science & Technology 45, no. 12:5346-5351. PNNL-SA-76701. doi:10.1021/es104266a
- Truex M.J., V.R. Vermeul, D.P. Mendoza, B.G. Fritz, R.D. Mackley, M. Oostrom, and T.W. Wietsma, et al. 2011. "Injection of Zero Valent Iron into an Unconfined Aquifer Using Shear-Thinning Fluids." Groundwater Monitoring and Remediation 31, no. 1:50-58. PNNL-SA-70324.
2010
- Mackley R.D., F.A. Spane, T.C. Pulsipher, and C.H. Allwardt. 2010. Guide to using Multiple Regression in Excel (MRCX v.1.1) for Removal of River Stage Effects from Well Water Levels. PNNL-19775 Rev. 1. Richland, WA: Pacific Northwest National Laboratory. Guide to using Multiple Regression in Excel (MRCX v.1.1) for Removal of River Stage Effects from Well Water Levels
- Mackley R.D., G.V. Last, J.A. Serkowski, L.A. Middleton, and K.J. Cantrell. 2010. MinChem: A Prototype Petrologic Database for Hanford Site Sediments. PNNL-19803. Richland, WA: Pacific Northwest National Laboratory. MinChem: A Prototype Petrologic Database for Hanford Site Sediments
- Vermeul V.R., J.P. McKinley, D.R. Newcomer, R.D. Mackley, and J.M. Zachara. 2010. "River-Induced Flow Dynamics in Long-Screen Wells and Impact on Aqueous Samples." Groundwater 49, no. 4:515-524. PNNL-SA-71263. doi:10.1111/j.1745-6584.2010.00769.x
2009
- Truex M.J., V.R. Vermeul, B.G. Fritz, R.D. Mackley, D.P. Mendoza, R.P. Elmore, and A.V. Mitroshkov, et al. 2009. Hanford 100-D Area Biostimulation Treatability Test Results. PNNL-18784. Richland, WA: Pacific Northwest National Laboratory. Hanford 100-D Area Biostimulation Treatability Test Results
- Vermeul V.R., B.N. Bjornstad, B.G. Fritz, J.S. Fruchter, R.D. Mackley, D.R. Newcomer, and D.P. Mendoza, et al. 2009. 300 Area Uranium Stabilization Through Polyphosphate Injection: Final Report. PNNL-18529. Richland, WA: Pacific Northwest National Laboratory. 300 Area Uranium Stabilization Through Polyphosphate Injection: Final Report
2008
- Fritz B.G., and R.D. Mackley. 2008. "A wet/wet differential pressure sensor for measuring vertical hydraulic gradient." Ground Water 48, no. 1:117-121. PNNL-SA-63832.
- Vermeul V.R., J.S. Fruchter, B.G. Fritz, R.D. Mackley, D.M. Wellman, and M.D. Williams. 2008. "In-Situ Uranium Stabilization Through Polyphosphate Injection: Pilot-Scale Treatability Test at the 300 Area, Hanford Site - 8187." In Waste Management 2008: HLW, TRU, LLW/ILW, Mixed, Hazardous Wastes & Environmental Management, 1-13. Tucson, Arizona:Arizona Board of Regent. PNNL-SA-58147.
2007
- Last G.V., C.J. Murray, D.A. Bush, E.C. Sullivan, M.L. Rockhold, R.D. Mackley, and B.N. Bjornstad. 2007. "Standardization of Borehole Data to Support Vadose Zone Flow and Transport Modeling." Vadose Zone Journal 6, no. 4:906-912. PNNL-SA-53079. doi:10.2136/vzj2006.0175