Are you responsible for cleaning up or preventing exposures to environmental contamination? Are you looking for the optimum approaches to do that? You need SME’s team of environmental experts, using their thorough knowledge of regulatory requirements, the latest techniques and technologies, and your priorities and goals, to develop and implement the best strategies for reducing contamination sources, stopping contaminant migration, and/or protecting human health and the environment using exposure barriers.

SME’s Remediation Team of scientists and engineers works with industrial, governmental, commercial and developer/redeveloper clients to find the right answer to the question – “What is the optimum solution to my site contamination problem?” We start with each client’s specific project goals and objectives, synthesize the site investigation data into an accurate conceptual site model, economically conduct feasibility analyses, treatability studies and site modeling, only if needed, and develop effective remedial action plans with practical engineering designs. The result? A great solution, whether seeking site closure, a no further action approval, or complying with continuing obligations.

Identifying and designing the appropriate response action depends on a lot of factors:

  • Types, levels, chemistry and mobility of contaminants
  • On-site and off-site levels of risk to human health and the environment
  • Regulatory requirements and cleanup levels
  • Site geology, hydrogeology and other conditions
  • Current and future site use
  • Source reduction/removal versus exposure or migration control approaches
  • Availability and timing of financial resources
  • Available remediation technology
  • Site constraints
  • Time constraints
  • “Greenness” and sustainability of solutions

Our Remediation Team members are experts at evaluating these factors to develop feasible alternatives, then work with clients to select the optimum approach for their circumstances, whether addressing a former manufactured gas (MGP) site, chemical leaks and spills, leaking underground storage tank, dry cleaner, or brownfield redevelopment. Our engineers and scientists have extensive experience in planning, designing, engineering, scheduling, managing construction and operating/maintaining a variety of environmental response actions for contaminated soil, sediment and groundwater; soil gas; and non-aqueous phase liquids (NAPL).


  • Soil vapor extraction
  • Dual phase extraction
  • In situ/ex situ chemical treatment
  • In situ/ex situ thermal treatment
  • Phytoremediation
  • Land farming, biostimulation and bio-augmentation
  • In situ/ex situ solidification and stabilization
  • Excavation and off-site disposal
  • Soil washing
  • Capping
  • Landfill/waste capping and containment


  • Dredging and disposal
  • Solidification/stabilization
  • In situ capping

Soil Gas and Methane

  • Vapor/methane intrusion barriers
  • Passive subslab venting
  • Active subslab venting
  • Migration barriers
  • Interception and venting trenches


  • Extraction and treatment
  • Migration barriers
  • Enhanced bioremediation
  • Air sparging
  • Dual phase extraction
  • Permeable reactive barriers
  • In situ chemical treatment
  • Monitored natural attenuation
  • Constructed wetlands


  • Determination of NAPL type and mobility
  • Active and passive recovery of light and dense NAPL

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