Lesley Sebol Manager - Groundwater Resources Mission Area (303) 384-2633 lsebol@mines.edu Specialties Hydrogeology, Groundwater, Water Quality, Environmental Science
Publications Sebol, L.A. and Buch-Leviatan, O. 2024. OF-24-13 Baseline Radiological Study Year 3: San Luis Valley, Colorado: Colorado Geological Survey, Golden, CO. Open File Report 24-13. Sebol, L.A. and Buch-Leviatan, O. 2024. OF-24-08 Baseline Radiological Study Year 3: Uravan Belt, Colorado: Colorado Geological Survey, Golden, CO. Open File Report 24-08. Sebol, L.A. 2024. OF-23-08 Baseline Radiological Study Year 2: Gunnison County, Colorado: Colorado Geological Survey, Golden, CO. Open File Report 23-08. https://doi.org/10.58783/cgs.of2308.xaxl6287. https://coloradogeologicalsurvey.org/publications/baseline-radiological-gunnison-colorado/. Sebol, L.A., and Lindsey, K.O. 2023. OF-22-14D 9-01 Digital Compilation of Surficial and Bedrock Geology of the Grand Junction 30x60 Minute Quadrangle, Delta, Garfield and Mesa Counties, Colorado (Data): Colorado Geological Survey, Golden, CO. Open File Report 22-14D. https://doi.org/10.58783/cgs.of2214.agzj7810. https://coloradogeologicalsurvey.org/publications/geology-grand-junction-quadrangle-delta-garfield-mesa-colorado-data/. Sebol, L.A. 2024. OF-22-10 Baseline Radiological Study Year 1: Wet Mountains, Colorado: Colorado Geological Survey, Golden, CO. Open File Report 22-10. DOI: https://doi.org/10.58783/cgs.of2210.wpgy1629. https://coloradogeologicalsurvey.org/publications/baseline-radiological-wet-mountains-colorado/. Sebol, L.A., Palkovic, M.J., Broes, L.D., and Barkmann, P.E. 2023. OF-19-01 Geology and Groundwater Resources of La Plata County, Colorado: Colorado Geological Survey, Golden, CO. Open File Report 19-01. https://doi.org/10.58783/cgs.of1901.ayne6155. https://coloradogeologicalsurvey.org/publications/geology-groundwater-resources-la-plata-colorado/. Sebol, L.A., Morgan, M. L., Broes, L. D. and Lindsey, K. 2022. Geologic Map Compilation at 1:100,000 Scale Within Colorado: Processes and Challenges for Creating Digital Geologic Data to Support a National Geologic Map by the End of This Decade: Geological Society of America Abstracts with Programs, v. 54, no. 5. https://doi.org/10.1130/abs/2022AM-383268. Barkmann, P.E., Palkovic, M.J., Sebol, L.A., Broes, L.D., and Swift Bird, K., Gates, T.K., Bailey, R.T., Cox, J.T., Underwood, E.N., and Diker, K. 2022. OF-19-11 Natural Sources of Mobile Uranium in the Downstream Reach of Colorado’s Arkansas River Valley and Evaluation of Best Management Practices for Mitigation.: Colorado Geological Survey, Golden, CO. Open File Report 19-11. https://doi.org/10.58783/cgs.of1911.wgkr1130. https://coloradogeologicalsurvey.org/publications/natural-uranium-colorado-arkansas-river-valley-mitigation-evaluation/. Lindsey, K.O., Barkmann, P.E., and Sebol, L.A. 2021. ON-010-02 Colorado Statewide Alluvial Aquifer: Colorado Geological Survey, Golden, CO. ON-010-02 (Map) and ON-010-02D(Data). https://coloradogeologicalsurvey.org/publications/colorado-alluvial-aquifer-data/. Barkmann, P.E., Sebol, L.A., Broes, L.D., and McGee, K.H. 2021. OF-18-12 Geology and Groundwater Resources of Elbert County, Colorado: Colorado Geological Survey, Golden, CO. Open File Report 18-12. https://doi.org/10.58783/cgs.of1812.zikw4840. https://coloradogeologicalsurvey.org/publications/geology-groundwater-resources-elbert-colorado. Barkmann, P.E., Broes, L.D., Palkovic, M.J., Hopkins, J.C. Swift Bird, K., Sebol, L.A., and Fitzgerald, F.S. 2020. ON-010 Colorado Groundwater Atlas: Colorado Geological Survey, Golden, CO. https://coloradogeologicalsurvey.org/water/colorado-groundwater-atlas/. Palkovic, M.J., Barkmann, P.E., Sebol, L.A., and Broes, L.D., 2019, “Cretaceous Sedimentary Bedrock and Its Impact on Uranium Concentrations in Irrigation Return-Flows to the Arkansas River, Southeastern Colorado.” In Geological Society of America, Abstracts with Programs, Vol. 51, No. 5. https://doi.org/10.1130/abs/2019AM-338695. Sebol, L.A., McGee, K.H., Johnson, E.P., and Barkmann, P.E. 2017. OF-17-01 Geology and Groundwater Resources of Mesa County, Colorado: Colorado Geological Survey, Open File Report 17-01. https://doi.org/10.58783/cgs.of1701.udrz8804 https://coloradogeologicalsurvey.org/publications/geology-groundwater-resources-mesa-colorado. Barkmann, P.E., Johnson, E.P., Sebol, L.A., and Fitzgerald F.S., 2017, OF-16-04 Geology and Groundwater Resources of Chaffee County, Colorado Geological Survey, Open File Report 16-04. https://doi.org/10.58783/cgs.of1604.vnwo8431. https://coloradogeologicalsurvey.org/publications/geology-groundwater-resources-chaffee-colorado. Sebol, L.A., Barkmann, P.E., Johnson, E.P., Fitzgerald F.S., and Curtiss, W., 2016, Geology, Groundwater Resources, and Water Quality of Park County, Colorado: Geological Society of America annual meeting, Abstracts with Programs, Vol., 48, No. 7. https://doi.org/10.1130/abs/2016AM-286609. Barkmann, P., Sebol, L.A., Johnson, E., Fitzgerald F.S., and Curtiss, W., 2016, Mapping Colorado’s Geology and Groundwater Resources on a County-Wide Scale: Geological Society of America annual meeting, Abstracts with Programs, Vol., 48, No. 7. https://doi.org/10.1130/abs/2016AM-286946. Barkmann, P.E., Sebol, L.A., Fitzgerald F.S., and Curtiss, W., 2015, OF-15-11 Geology and Groundwater Resources of Park County, Colorado Geological Survey, Open File Report 15- 10.58783/cgs.of1511.zpay839411. https://coloradogeologicalsurvey.org/publications/geology-groundwater-resources-park-colorado Barkmann, P.E., Fitzgerald F.S., Sebol, L.A., Curtiss, W., Pike, J., Moore, A., and Taylor, B., 2015, Geology and Groundwater Resources of Douglas County, Colorado Geological Survey, Open File Report 15-10. https://coloradogeologicalsurvey.org/publications/geology-groundwater-resources-douglas-colorado Sebol, L.A., Robertson, W.D., Busenberg, E., Plummer, L.N., Ryan, M.C., and Schiff, S.L., 2007, Evidence of CFC degradation in groundwater under pyrite-oxidizing conditions, J. of Hydrology, Vol. 347: 1-2 (15 Dec.), pp. 1-12. Sebol, L.A., 2005, Evaluating Shallow Groundwater Age Tracers: Br-, CFCs, 3H/3He, SF6, and HCFCs/HFCs, Ph.D. dissertation, Earth Sciences Dept., University of Waterloo. Sebol, L.A., Robertson, W.D., and Schiff, S.L., 2002, Determination of the Age of Groundwater Contamination Using CFCs in Waterloo, Ontario, Proceedings in the 55th Canadian Geotechnical and 3rd Joint IAH-CNC and CGS Groundwater Specialty Conferences, Niagara Falls, Ontario, pp. 1093-1100, October 20-23. Sebol, L.A., Robertson, W.D., Schiff, S.L. and Rudolph, D., 2001, Determination of Groundwater Age Using CFCs at the Thornton Well Field, Woodstock, Ontario, Proceedings in the 54th Canadian Geotechnical and 2nd Joint IAH-CNC and CGS Groundwater Specialty Conferences, Calgary, Alberta, pp. 1093-1100, September. Sebol, L.A., 2000, Determination of Shallow Groundwater Age Using CFCs in Three Shallow Aquifers in Southern Ontario, M.S. dissertation, Earth Sciences Dept., University of Waterloo.
Interests & Projects Current Projects County Geology and Groundwater Resources Baseline Radiological & Metals Study – a 5-year study of residential private wells throughout Colorado South Platte Basin Salinity Bedrock Geological Study Research Interests Contaminant Hydrogeology Geologic Influences on Water Quality Geologic Compilation Mapping Evaluating Groundwater Redox Geochemistry Environmental Science Evaluating Nature & Extent of Contamination Contaminant Fate & Transport Environmental Site Assessments, Remediation, and Monitored Natural Attenuation Landfill Monitoring Groundwater Age Determination
Education & Experience Experience Colorado Geological Survey, Geologist-Senior Hydrogeologist (2014-present) Toeroek Associates Inc., Hydrogeologist, Sr. Environmental Scientist (2013-2014) Golder Associates Inc., Senior Project Hydrogeologist, 2005-2013 Loureiro Associates Inc., Hydrogeologist (1992-1997) YWC Inc., Hydrogeologist (1990-1992) Heynen Engineers, Geologist (1987-1990) Education Ph.D., Hydrogeology, University of Waterloo, 2005 M.S., Hydrogeology, University of Waterloo, 2000 M.S., Environmental Science, University of New Haven, 1991 B.S., Geology, University of Maryland, 1986 Certifications Professional Geologist – Colorado, as defined in C.R.S. 23-41-208 Professional Geoscientist – Ontario (2006-2011) Professional Associations Colorado Ground Water Association (CGWA)