Share Email Print
cover

Proceedings Paper

Subsurface screening of petroleum hydrocarbons in soils via laser-induced fluorometry over optical fibers with a cone penetrometer system
Author(s): Stephen H. Lieberman; Sabine E. Apitz; Lisa M. Borbridge; Gregory A. Theriault
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

A novel field screening method is described that couples a fiber optic based chemical sensor system to a truck mounted cone penetrometer. The system provides the capability for real- time, in situ measurement of petroleum hydrocarbon contamination and soil type to depths of 50 m. The technique uses a hydraulic ram in a truck with a 20 ton reaction mass to push an instrumented probe into the ground. Fluorescence is excited through a sapphire window in the probe by 337 nm light from a pulsed nitrogen laser. The excitation pulse is transmitted down the probe over a 100 m silica clad silica optical fiber. The resulting fluorescence from aromatic hydrocarbons in the soil is returned to the surface over a second fiber, dispersed with a spectrograph, and quantified with an intensified linear photodiode array. Field test data is presented that demonstrates how the system can be used for rapid three-dimensional delineation of a POL (Petroleum-Oil-Lubricant) contaminant plume at a hazardous waste site. Fluorescent fingerprints from 14 samples of 9 fuel types are used to show how spectral differences can be used for identifying contaminant sources. The effects of volatilization of different fuel types on the measured fluorescent signal are discussed.

Paper Details

Date Published: 9 March 1993
PDF: 11 pages
Proc. SPIE 1716, International Conference on Monitoring of Toxic Chemicals and Biomarkers, (9 March 1993); doi: 10.1117/12.140275
Show Author Affiliations
Stephen H. Lieberman, Naval Command, Control and Ocean Surveillance Ctr. (United States)
Sabine E. Apitz, Naval Command, Control and Ocean Surveillance Ctr. (United States)
Lisa M. Borbridge, Naval Command, Control and Ocean Surveillance Ctr. (United States)
Gregory A. Theriault, Naval Command, Control and Ocean Surveillance Ctr. (United States)


Published in SPIE Proceedings Vol. 1716:
International Conference on Monitoring of Toxic Chemicals and Biomarkers
Tuan Vo-Dinh; Karl Cammann, Editor(s)

© SPIE. Terms of Use
Back to Top