- Once released to the subsurface, greater percentages of contaminants (benzene, etc.) can dissolve into the groundwater, resulting in larger dissolved plumes, with faster and further plume migration.
- When ethanol fuels encounter older, residual petroleum in soils, the previously sorbed residuals can be remobilized by contact with the ethanol, and flushed toward the water table.
- Ethanol inhibits the natural biodegradation of petroleum contaminants, especially BTEX, due to the preferential degradation of the ethanol.
The net effect is less natural attenuation, and increased dissolution and migration of gasoline constituents in groundwater. And the higher the ethanol concentrations, the greater the effects.
- High resolution topographic and aerial photographic surveys can be obtained and processed quickly and cost effectively for use in complex environmental due diligence, land redevelopment, landfill volume calculations, pipeline/stream surveys, facility infrastructure inspection, etc.
- Geophysical instrumentation can be flown over large areas to survey for buried metallic objects or debris (e.g. drums, underground tanks, pipelines, etc.).
- A variety of gas monitoring equipment can be drone-mounted, allowing large areas to be quickly surveyed at a safe distance.
- Remediation sites that involve contaminated groundwater discharges to surface water bodies can be challenging to fully characterize. It is possible with drone-mounted infrared cameras to locate these groundwater discharges along stream embankments with pinpoint accuracy.