Key Environmental, Inc.
Map of Impacted Soil
 
Soils and Sediment Removal and Floodplain Restoration
Investigation, Design, Construction Management
Dozer Spreading Backfill
Project Activities
  • Subsurface Investigation
  • Aquifer Testing
  • Permit Applications (Army Corps. of Engineers, Massachusetts Department of Environmental Protection, and Various Local Authorities)
  • Preparation of Construction Drawings and Specifications
  • Bid Solicitation and Review
  • Construction Management
  • As-Built Documentation / Reporting
The project site is a 50-acre former wood-treatment facility that has been inactive since 1988. The site is being addressed under CERCLA, including two Administrative Consent Orders (ACOs) between the USEPA and the property owner.  Multiple removal actions were required per the ACO requirements, including:
  • Removal of shallow soils from the location of a former surface impoundment
  • Removal of shallow soils and reconstruction of on-site drainage ditches
  • Removal of soils and sediments from a downstream floodplain area, and replacement of floodplain / wetland-related woody plant species
KEY prepared the plans for these removal actions and provided Construction Quality Assurance services during their implementation.  KEY successfully negotiated with USEPA a waiver from requirements for post-excavation confirmation sampling for the drainage ditches and floodplain area.  This waiver ensured that the predetermined volume of soils / sediments (and attendant costs) did not escalate during performance of the removal actions.  Finally, KEY has installed several test borings and monitoring wells, and conducted related aquifer testing, in support of an ongoing characterization of groundwater conditions at the site.  The site characterization included the use of Laser Induced Fluorescence (LIF) to delineate the lateral and vertical extent of DNAPL in the subsurface.
Highlights
Removal actions were successfully implemented for the surface impoundment, on-site drainage ditches and downstream floodplain area.
A waiver from requirements for post-excavation confirmation sampling was successfully negotiated, which ensured that removal volumes and costs would not escalate.