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U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Colorado Springs, Colorado, September 20-24, 1993, Water-Resources Investigations Report 94-4015

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Effect of Air Drying on Solvent Extraction of Trichloroethylene-Contaminated Soil,Picatinny Arsenal, New Jersey

by

David Koller (U.S. Geological Survey, West Trenton, NJ), Thomas E. Imbrigiotta (U.S. Geological Survey, West Trenton, NJ), and James A. Smith (Department of Civil Engineering and Applied Mechanics, University of Virginia, Charlottesville, VA)

Abstract

The effect of air drying trichloroethylene (TCE)-contaminated soils prior to extraction with methanol to determine the concentrations of sorbed TCE was investigated. Saturated-aquifer soil and ground-water samples were collected at five locations within a TCE plume in ground water at Picatinny Arsenal, New Jersey. Each soil sample was split into two fractions: one fraction underwent extraction while wet and the other underwent extraction after being air dried overnight. Concentrations of TCE in the wet soils were corrected for TCE in the soil moisture by subtracting the TCE concentrations determined in the ground-water samples. Comparison of the extraction results for air-dried and wet soils showed that, for four of the five samples, the concentration of sorbed TCE in the air-dried fraction was higher than or not significantly different from that in the wet fraction. In addition, the precision of the extraction results for air-dried soils was not significantly different from the extraction results for wet soils.

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