Contaminated Site Closure

Contaminated Site Closure generally consists of remedial investigation, risk assessment, feasibility study, remedial design, and remedy implementation.

Remedial Investigation activities are intended to assess the physical and chemical nature and extent of hazardous substances released to the environment. MFA optimizes the data collection process by starting with the end in mind; scientists and engineers collaborate to identify short and long-term data needs while our environmental chemists coordinate with laboratories to maximize the quality of the data generated.  From our extensive experience in negotiating scopes of work with regulatory agencies to our efficient use of site data to meet all required project data quality objectives, MFA has demonstrated success in efficiently navigating the investigation process.

Environmental risk assessments are conducted to evaluate whether exposure to contaminants in environmental media such as soil, groundwater, air, and sediment would result in unacceptable health risk to people or ecological species. Developing a realistic understanding of human health and ecological risk requires significant understanding of multiple site- and chemical-specific elements, including the presence of ecological receptors and whether there are any protected species; the habitat, range, diet, and lifecycle of the species present; site uses, including direct and indirect exposure pathways and potential for fish catch and consumption; the fate and transport of the chemicals associated with the site; the potential for chemical accumulation in human, plant, and animal tissue; and the toxicological effects of the chemicals on the species present and on human health. Human health and ecological risk assessments can be complex; MFA tailors each assessment to efficiently meet the objectives of each project that can lead directly to decisions and forward progress.

MFA’s environmental engineers and scientists work closely together interpreting remedial investigation and risk assessment findings to develop a remedy that incorporates scientific and engineering requirements. MFA has significant experience in performing feasibility studies at a wide variety of sites, tailoring the selected remedy to meet the needs of the facility while satisfying environmental requirements. MFA has prepared feasibility studies at sites ranging from small fueling stations to large industrial sites with contaminant impacts found in soil, groundwater, and river and marine sediment.

_T. Wall

Ted Wall, PE

Oregon Operations Director/Principal Engineer