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Remedial Investigation / Feasibility Studies

Stone staff have extensive experience performing Remedial Investigation and Feasibility Studies (RI/FS) in compliance with US Environmental Protection Agency (EPA) guidance. We bring High Resolution Site Characterization (HRSC) expertise to remedial investigations, including Triad Systematic Project Planning and other project management methodologies, resulting in cost-effective Conceptual Site Model (CSM) development. We select the best tools and technologies for each site., and develop investigative work plans to gather data on the fate and effect of contaminants in all types of environmental media including soil, sediment, surface water, groundwater, bedrock, and air.

Our familiarity with federal, state, and local Applicable and Relevant and Appropriate Regulations (ARARs) enables us to efficiently evaluate and compile the regulatory criteria that will guide development of Remedial Action Objectives (RAOs) and Remediation Goals (RGs).

Stone works closely with toxicologists and risk assessors to develop human health and environmental risk assessments that accurately reflect the realistic exposure pathways and hazards to human health and ecological receptors. An important part of the RI/FS process is being able to effectively communicate the impacts of contamination on environmental media, the fate and transport of the contaminants, and the hazards these contaminants pose to sensitive receptors in a practical and easily digestible manner.

Our three dimensional visualization techniques help to visually depict the data in a way that cannot be achieved with tabulated data or two dimensional representations of the data. In addition, our staff frequently provides public outreach and stakeholder communication for our clients.

Once the site has been adequately characterized, ARARs have been compiled, and human and ecological risks have been quantified, we will develop the RAOs and RGs and evaluate remedial technologies. Decades of experience conducting FSs, designing and implementing remedial actions, performing operations and maintenance of remedial systems, and optimizing remedial efficiency has given our staff the knowledge necessary to develop practical and realistic remedial alternatives. Real life experience with implementation of remedial alternatives results in realistic cost estimates allowing for accurate cost comparisons between alternatives.

Once a proposed remedy has been selected, Stone often assists our clients with preparation of Proposed Plans and Decision Documents, as well as preparing and presenting information regarding selected remedy at public meetings. As a follow-up activity, we have also performed Five Year Reviews of remedial progress at multiple Superfund Sites.