POL Sensor Validation of SCAPS
Abstract
The Laser-Induced Fluorescence technologies using Site Characterization and Analysis Penetrometer System platform provide quick and cost-effective real-time field screening of the physical and chemical characteristics of Petroleum, Oil, and Lubricant impacted sites. A secondary goal is the acquisition of geologic information while reducing the volume of Investigation Derived Waste (IDW). Each LIF system uses a pulse laser coupled with an optical detector to measure fluorescence via optical fibers. Measurements are made through a probe that is pushed into the ground with a truck-mounted Cone Penetrometer System, widely used in the geotechnical industry for determining soil strength and soil type. The LIF methods provide qualitative to semi-quantitative data on the in situ distribution of petroleum hydrocarbons from the fluorescence response induced in Polynuclear Aromatic Compounds. This report focuses on technology demonstration objectives in which the LIF sensor was evaluated as a field screening method by comparing, in particular, the downhole Nd:YAG SCAPS-LIF with the nitrogen-based SCAPS-LIF and to data produced by conventional sampling and analytical methods. Generally, the SCAPS-LIF technologies produce results that agree well with conventional methods for qualitatively detecting subsurface petroleum. While the nitrogen-based LIF sensor has been certified by the California Department of Toxic Substances Control, the Nd:YAG SCAPS-LIF experienced difficulties in the field and has not gained formal regulatory acceptance. Nonetheless, as a field screening tool, SCAPS-LIF can delineate the distribution and boundaries of the contaminant source. Such decisions can reduce the overall number of samples that need, saving costs.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1997
- Accession Number
- ADA631390
Entities
People
- David Knowles
- Stephen Lieberman
Organizations
- Naval Information Warfare Systems Command