 |
| Induced Fluorescence
Sensors for Direct Push Systems |
| The Laser Induced Fluorescence (LIF)
Probe can be deployed by cone penetrometer for real-time, depth discrete
delineation of contaminants that fluoresce under ultraviolet illumination,
such as petroleum oils and libricants (POL) and co-contaminants in Dense
Non-Aqueous Phase Liquids (DNAPLs). Several mature implementations of this
technology exist, differing in illumination source and wavelengths and in
the methods used to analyze the time and/or frequency spectra of the
emitted fluorescence. This technology is one component of the DNAPL
Toolbox (TechID 237). |
 |
Developers:
| • |
Dakota Technologies,
Inc. | |
Applications:
| • |
The LIF Probe can be deployed as a screening tool
to detect many organic compounds in the subsurface, particularly
POLs and used DNAPL solvents. |
| • |
The LIF Probe provides rapid data analysis leading
to optimized real-time selection of drilling and sampling locations.
|
| • |
The fluorescence of DNAPL depends on dissolved
PAHs typically found in greases and
lubricants. | |
Benefits:
| • |
LIF Probe provides a fast and inexpensive source
of screening data |
| • |
LIF Probe reduces worker exposure to contaminants
with fast analyses and no derived drilling waste |
| • |
By providing real-time data from inexpensive CPT
boreholes, the LIF Probe aids in rapid site
characterization | |
Status:
| • |
Deployed at SRS in FY 98 and non-DOE sites in FY
99 for DNAPL delineation. |
| • |
Tested and demonstrated by EPA for POL delineation
in 1996. |
| • |
Commercially available through Dakota Technologies
and Fugro Geosciences; similar technology available from Applied
Research Associates. | |
Milestones:
|
|
|
|
|
|
FY 00
| |
| IT - ITSR Publication;
PR - Peer Review; DP - Deployment; AI -
Available for Implementation; DM - Demonstration; BST
- Bench-Scale Testing; | |
|
|
| 9/19/02 |
Characterization,
Monitoring and Sensor Technology |
OST Ref #:
2237 | |
