Accession Number:

ADA350526

Title:

The Influence of PAH Concentration and Distribution on Real-Time In-Situ Measurements of Petroleum Products in Soils Using Laser Induced Fluorescence

Descriptive Note:

Corporate Author:

LITTLE (ARTHUR D) INC CAMBRIDGE MA

Report Date:

1995-01-01

Pagination or Media Count:

28.0

Abstract:

Real-time laser induced fluorescence LIF in situ measurements of soil samples provide a reliable and cost-effective screening tool for hydrocarbon site assessments. The site characterization and analysis penetrometer system SCAPS, is a truck-mounted cone penetrometer probe modified with a sapphire window and connected to a laser by fiber optics. The pulsed nitrogen laser 337-nm excitation source induced fluorescence in polynuclear aromatic hydrocarbons PAHs, which are present in petroleum products. The fluorescence response of these compounds is measured with a fluorometer. The SCAPS can provide continuous hydrocarbon screening measurements to soil depths greater than 100 feet. Discrete soil samples collected from SCAPS boreholes were extracted and analyzed for total petroleum hydrocarbons TPH, by gas chromatography with flame ionization detection GCFID, and 16 parent and over 100 alkyl substituted PAH compounds by gas chromatography with mass spectrometry detection GCMS. This method provides a basis for evaluating the relationship between TFH and PAH concentrations in the soil samples and laser induced fluorescence measurements from the soil borings.

Subject Categories:

  • Organic Chemistry
  • Soil Mechanics
  • Miscellaneous Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE