A Field Method to Quantify Chlorinated Solvent Diffusion, Sorption, Abiotic and Biotic Degradation in Low Permeability
Abstract
The objective of this project is to develop a method, including tools and protocols, for determining the sitespecific transport properties of chlorinated volatile organic compounds (CVOCs) in low permeability matrix of fractured sedimentary rock aquifers. In order to achieve the project objective, we developed and tested: 1) a packer tool,2) a specialized sampling apparatus, 3) a dosing tool (for tracer introduction), 4) a practicable test protocol, and 5) a numerical model capable of simulating the field data. In an uncased portion of a well, a dual packer system isolates a low permeability test interval that has been exposed to CVOCs. The monitoring data supplies the record of historical exposure of the matrix rock to contamination in the borehole. We initiate a field test by replacing the contaminated groundwater in the test interval with groundwater with the contaminants removed and tracers added. The concentrations of the CVOCs, including degradation products (DPs), and tracers are monitored overtime. Simulations are used to estimate the diffusion and sorption coefficients in the matrix, and the biodegradation rate coefficients in the borehole, for the contaminants and DPs.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 2021
- Accession Number
- AD1169166
Entities
People
- Allen Shapiro
- Claire Tiedeman
- Daniel Goode
- Michelle Lorah
- Richelle Allen-king
- Thomas Imbrigiotta
Organizations
- University at Buffalo