Brownfields – Electronics Firm, Waste Pond Remediation

Our confidential client engaged SCS Engineers and SCS Field Services, our construction and O&M divisions, to perform the remedial engineering design and construction of a 3.7-acre site requiring soil stabilization where a waste water lagoon once existed.

The excavation contained 27,000 tons of soil impacted with cadmium concentrationsSCS_waste-pond-remediation greater than 1 milligram per liter (mg/L). Soils with these concentrations are subject to RCRA standards. Therefore, these soils were stabilized in-place using Portland cement to render them non-hazardous for disposal at a local landfill. The Portland cement was placed in thin lifts and blended with road stabilizer. The remedial construction for the site included the following activities:

  • Design, specifications and workplans
  • Health and safety monitoring
  • Permits from the city, flood control, county and state
  • Install stormwater best management practices
  • Demolish and remove above ground structures from the excavation area
  • Recycle asphalt in the excavation area
  • Remove base-rock and other potential base materials
  • Remove and dispose of soils containing non-hazardous concentrations of cadmium at concentrations greater than 40 milligrams per kilogram (mg/kg)
  • Dewatering
  • Confirmation sampling and analysis
  • Air monitoring
  • Stabilizing soils containing hazardous levels of cadmium using Portland cement prior to removal and disposal
  • Stockpile or direct load soil
  • Transport and dispose of excavated soil
  • Import 27,000 tons of clean material
  • Backfill, grade and compact excavation area