LIF

LIF Deployment

LIF Deployment in a Harbor front

The Ultra Violet Optical Screening Tool (UVOST) uses patented Laser Induced Fluorescence (LIF) technology and efficiently delineates petroleum, oil, and lubricant (POL) contaminants in the subsurface.  All the usual forms of POLs, including; gasoline, diesel fuel, jet fuel, and hydraulic fluids, can be detected via the response of their polycyclic aromatic hydrocarbon (PAH) constituents.  The fluorescence signal scales proportionally with NAPL concentration (i.e., the more impacts in the subsurface the higher the response).  UVOST’s LIF technique, in conjunction with direct push deployment, yields a detailed three-dimensional map of the NAPL distribution, in real time.

Benefits for using the UVOST include;

LIF Probe

LIF Probe on-Site

  • Typical detection limit of 10-500 ppm (NAPL type and soil dependent)
  • Operates effectively above and below the saturated zone
  • Probe advances at ~2 cm/sec without pause
  • Typical daily productivity of 75 to 90 meters across 10-20 locations
  • Centimeter resolution data density coupled with nearly instantaneous response provides continuous detailed log of product distribution and heterogeneity
  • Color-coded logs for the ultimate in screening level qualitative information
  • Waveforms offer product identification/verification and rejection of non-contaminant fluorescence such as mineral, peat, and other minor interferences
  • LIF Example Log

    LIF Example Log