· Geotechnical and geoenvironmental engineering testing of materials

· Integration of field, laboratory and numerical methods

· Microbiological effects in geotechnical systems

· Barrier material durability and improvement

· Solid, hazardous and nuclear waste management

· Landfill covers and liners; slurry trench cutoff walls

· Multiphase flow through landfill bioreactors

· Environmental policy and technology transfer in developing countries