Investigation and Remediation

Wilcox Environmental Engineering has developed an exceptional reputation that emphasizes cost reduction and site closure as the primary objectives from the start of each project. Our wide-ranging experience includes developing thorough conceptual site models that allow us to design and implement effective, economical solutions for remediating and managing risks associated with petroleum hydrocarbons, chlorinated solvents, and metals associated with commercial sites, industrial operations and processes, and waste disposal facilities.

Our team of experienced professional geologists and engineers has decades of combined experience in managing site investigation and remediation projects under multiple state and federal oversight programs for the Midwest, including all Indiana Department of Environmental Management (IDEM) remediation programs consisting of leaking underground storage tanks (LUST), excess liability trust fund (ELTF), and the voluntary remediation program (VRP), as well as state, EPA and HUD Brownfield programs.




  • Site characterization and contaminant delineation
  • Vapor intrusion assessments and mitigation
  • Conceptual site model development
  • Health-based risk assessment
  • Contaminant fate and transport modeling
  • Remediation design investigations, feasibility studies, and bench-scale testing
  • System engineering and process design
  • Corrective Action Plans, Remediation Work Plans, reporting, and regulatory negotiations
  • System installation, monitoring, operations/maintenance and optimization
  • Oxidant and reductant injection for contaminant destruction and to establish subsurface reactive zones




Our engineers, geologists, and technicians operate and maintain remediation systems that are either designed in-house or installed by others. Wilcox’s staff has experience with the following remediation approaches, which are applied individually or in combination as project requirements dictate:

  • Land treatment
  • Trenches/slurry walls
  • In-situ chemical oxidation and reduction
  • In-situ and ex-situ bioremediation and thermal treatment
  • Exposure risk-management strategies employing engineering and institutional controls
  • Air sparging/stripping
  • Free product recovery
  • Bioventing/bioremediation
  • Soil vapor extraction (SVE)
  • Multi-phase extraction
  • Soil washing
  • Thermal remediation
  • Phytoremediation