PCB Impacted Soils Remediation, Central New York
PROJECT HIGHLIGHTS:
- Demolition and removal of 350 tons of hazardous PCB impacted concrete
- Excavation and management of 815 tons of hazardous PCB soil
- Management of impacted groundwater
- Backfilling of excavation area
- Restoration of the site
This site was a former manufacturing facility located in Central New York and required the removal of PCB impacts associated with the site’s former use. The site was comprised of a 250,000 square foot concrete slab, which was the footprint of the former manufacturing facility. PCB containing lubricating oils were used in select processes at two locations within the building. The concrete slab and subsurface soils below these areas required removal. The site was intended to be used as a solar farm; remediation and restoration was required before the solar farm could be completed.
The PCB impacts were isolated to two areas. One area was designated to be managed as non-hazardous waste that required concrete slab removal only. The other area was determined to be hazardous waste, which required the concrete and several feet of subsurface soils to be removed from the site.
SES saw-cut the concrete around the perimeter of each impacted area. The concrete was demolished into manageable pieces utilizing a hydraulic breaker on an excavator. The concrete was then stockpiled within the footprint in preparation for loading. Finally, the concrete was loaded into permitted vehicles and transported off-site via non-hazardous and hazardous waste manifests to the approved designated facility.
The soils below the concrete were then sampled for PCB impacts. One area required no additional excavation and was approved for restoration. The other area required additional excavation and confirmatory testing.
The soils in this area were removed in two-foot increments, live loaded into trucks, and transported off-site via a hazardous waste manifest for disposal. The final excavation depth in this area reached six feet below the concrete.
Groundwater entered the excavation and required use of a storage tank. The water in the tank was determined to be non-hazardous waste and was transported off-site for disposal via a waste manifest.
Clean stone was imported and placed into the excavation in one-foot lifts that were compacted with a remote vibratory plate tamper. Once the backfilling activities were complete, SES restored all portions of the concrete slab that had been removed during the remedial activities.
