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

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LATA was the DOE prime contractor for both small business set-asides at Portsmouth and 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


Major groundwater remediation activities performed at  Paducah 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.

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.


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

  • 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

LATA deactivated, demolished and dispositioned wastes associated with the most contaminated building on site; a 60,000 sq. ft., 14-story Metals Reduction Facility, highly contaminated.

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

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LATA demolished the 2nd most contaminated building on-site; a 100,000 sq. ft., seven-story Complex, highly contaminated.

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Paducah, Kentucky & Portsmouth, Ohio

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