Paducah & Portsmouth Environmental Remediation and Decontamination and Demolition (D&D)
Kentucky & Ohio

Paducah

paducah_aerial

Portsmouth

Portsmouth

LATA was the DOE prime contractor for both small business set asides at Portsmouth & Paducah. LATA had single-point, fence-to-fence responsibility for:

  • Remediation of land sites
  • Groundwater, and surface water
  • Deactivation and demolition of contaminated facilities
  • Disposition of project wastes

 

Work Performed at Paducah: Major groundwater remediation activities included:

  • Completing CERCLA documents to support a Dissolved Phase Plumes groundwater remedy
  • Investigating potential sources of groundwater contamination
  • Remediating the Southwest Plume sources in accordance with the ROD
  • Upgrading the two pump and treat facilities to improve uptime and removal of TCE
  • Implementing Electrical Resistance Heating (ERH) to remove the DNAPL source in the Upper Continental Recharge System 20–60 ft bgs
  • Performing Deep Soil Mixing at SWMU 1 (Oil/Land Farm) where TCE was believed to be a source of groundwater contamination to the South West Groundwater Plume
  • Performing a Steam Injection Treatability Study to obtain data on the behavior of steam injected into the Regional Gravel Aquifer (RGA) 60–100 ft bgs under variable injection scenarios

 

The Paducah remediation scope also included dispositioning newly generated low-level waste (LLW) and mixed LLW as well as operation and maintenance of seven fixed facilities to treat, repackage and store wastes.

Paducah C-340 siding removal

LATA deactivated, demolished and dispositioned wastes associated with the most contaminated building on-site—the 60,000 ft2, 14-story C‑340 Metals Reduction Facility, highly contaminated with PCBs, asbestos, uranium, and metals.

Debris is characterized, downsize, and prepared for disposition from the C-410 Feed Plant's "eastern third" demolition

LATA demolished the second most contaminated building on-site—the 100,000 ft2, seven-story C‑410 Complex, highly contaminated with uranium, Tc-99, asbestos, and PCBs.

PAD_C-400-1024x682

The TCE treatment area at C-400 for the Electrical Resistance Heating (orange-shaded area).

Paducah C-400 drilling

LATA implemented electrical resistance heating system to remove TCE from as deep as 60 feet below ground.


The Portsmouth Environmental Remediation project demonstrated LATA’s ability to perform a large fence-to-fence remediation and environmental management at DOE’s 3,780-acre Portsmouth Gaseous Diffusion Plant.

Work Performed at Portsmouth: LATA was the site remediation contractor and planned, managed, integrated, and executed remediation activities such as:

  • Groundwater and soil remedial actions
  • Removal of legacy waste
  • Decontamination and Decommissioning of inactive facilities
  • Disposition of highly enriched uranium
  • Operation of site’s waste storage facilities
  • Surveillance and maintenance activities

The X-633 scope of demolition/remediation work included four cooling towers (58 cells) and a pump house within a 20-acre area required:

  • Utilities isolation
  • Hazardous material removal
  • Structure demolition
  • Final grading and ground cover
  • Disposition of all demolition-related waste
  • Identification/segregation of surplus equipment for reuse/recycle

The 924,874 square feet X-533 Electrical Switchyard scope of demolition/remediation included:

  • Utilities isolation
  • Demolition of 160 40-foot tall towers
  • 32 120-foot tall towers
  • PCB-contaminated soil remediation
  • Final grading and ground cover
  • Identification/segregation of surplus equipment for reuse/recycle
  • Disposition of waste
633 cooling
switchyard demo