contaminant distribution

Contaminant distribution, like groundwater flow, differs in high and low permeability materials.

Work on contaminant distributions and effects continue.

Preliminary examination of the data reveals that ocean processes are important contributors to contaminant distributions.

Measured and modelled chlorinated contaminant distributions in St. Clair River water.

Varying groundwater velocity and contaminant distribution in the different types of subsurface materials have important implications for applying pump and treat.

By using amphipods as an indicator, scientists can monitor spatial and temporal trends in organic contaminant distribution in the marine food web.

Environmental managers also will want up-to-date information on changing risk profiles for contaminant distributions, oil spill trajectories and other hazards that are affected by ocean regimes.

Site-specific factors which make In-situ treatments less effective include low soil permeability, subsurface heterogeneities, contaminant distribution, obstructions to treatment zones, and process control limitations.

In this paper, steady-state unsaturated moisture distributions are employed in the dispersion-advection equation to find transient contaminant distributions beneath a landfill.

Detailed soil and groundwater investigations and hydrogeological analyses to determine contaminant distributions, environmental liabilities and suitable subsurface remediation options.

Lastly, I study geographical patterns in organic contaminant distributions in the Canadian arctic, focusing on one widespread species, the ringed seal, Phoca hispida.

In the gas phase the problem with this technique has been that the destruction is not uniform due to uneven contaminant distribution in the off-gas and fluctuations in gas flowrate.

Consequently, observed contaminant distributions at creosote facilities are the best indicators of how PAHs from CIWM will behave in the environment (Hoffman and Hrudey, 1990).

The federal and provincial regulations, and the decisions of individual regulators have encouraged a conservative approach which does not foster trust in the scientific relationship among such elements as hydrology, geology, and contaminant distribution.

The primary system utilised is Earth Vision from Dynamic Graphics, Inc. The main objective is to model the porewater contaminant distribution in three dimensional space to help to optimise groundwater remediation.

This modelling will refine the site conceptual model of aqueous contaminant distribution in advance of later field studies, and will include a sensitivity analysis to assess variability in model predictions based on uncertainty in the parameter inputs.

Considerations should include, but not be limited to, possible local and regional impacts on air quality and climate, variation in wildlife abundance and distribution; contaminant distribution; and demographic and socio-economic trends, including indicators of economic and social well-being.

Lecture Topics This course focuses on the design of groundwater remediation methods for dissolved contaminants and NAPL'S (non-aqueous phase liquids) with an emphasis on the role of aquifer heterogeneity and contaminant distribution.

Specific activities may include: 1. additional intrusive investigations to quantify all contaminants and concentrations; 2. computer modelling to establish contaminant distributions and/or migration patterns; and 3. other activities required to obtain the necessary information to develop a suitable site management/remedial strategy.

The nature of contaminant distribution, such as the presence/absence of LNAPL or DNAPL, may dictate the overall feasibility of In-situ treatment, as well as the type and sequence of treatments that may be required.