Contaminated Soil Investigations
- Investigated failure of soils handling and processing system for remediation of stockpiled creosote-contaminated soil in Canada.
- Investigated geotechnical and earthwork construction aspects of imported oil-contaminated fill at a commercial development in Santa Maria, California. Testified for defendant at deposition and trial; case included in a listing of Top 10 Defence Verdicts 
- Senior Technical Reviewer and consulting Geological Engineer for site characterization, geological engineering analysis, slope stability and remediation concepts in strong to weak rock masses, for major expansion of the Prima Deshecha landfill, Orange County, California.
- Investigated rock mass conditions and landslides for expansion of the Vasco Road and Altamont (Livermore, CA) landfill sites in eastern San Francisco Bay; leader of team that developed innovative approaches to rock mass analysis for weak rocks .
 B. Richards vs. Texaco et al, 2003 (Santa Barbara County Court).
 Zekkos, D.; Medley, E, Hunt, C; Waeber, J and Jesionek, K; “Rockmass Characterization and Geoengineering Analyses of Two Canyon Landfill Sites in Northern California Using a Layered GSI Approach:, Proc 6th Int. Conf. Geotechnical Engineering Case Histories, July 2008, New York.