SCG understands the vital importance of properly characterizing and delineating a contaminated site. As such we strive to stay a breast of the latest tools, information and methodologies available to site professionals.
The UVOST is an In Situ Fluorescence Spectrometer. It works on the principle of LIF – Light Induced Fluorescence. It is a probe that can be deployed in the subsurface to effectively delineate free phase hydrocarbons (NAPLs – Non-aqueous Phase Liquids).
All fuels, oils and crudes are complex mixtures of Hydrocarbon molecules containing Polycyclic Aromatic Hydrocarbons (PAHs) in varying concentrations and compositional arrangements. For LIF application the PAHs are of importance. PAH molecules will fluoresce; simply put, they will absorb and subsequently re-emit photons. PAHs are also highly oleophilic, when exposed to the subsurface environment their concentrations will be orders of magnitude higher in the free phase then in the aqueous, vapour or sorbed phases.
These two properties allow the UVOST to be a very effective, free phase characterization tool. Mounted on a direct push drill rig, the UVOST probe is pushed into the subsurface. UVOST can “see” any free phase, PAH containing products; delineate their subsurface distribution on the cm scale and distinguish between different NAPLs based on their unique PAH makeup.
This tool allows for faster, higher resolution and more cost effective delineation of free phase hydrocarbons. It has multiple applications and can provide valuable subsurface information at various stages of a contaminated sites lifecycle. SCG is pleased to provide this valuable tool to its clientele. For more information and site-specific details, please contact SCG.