Former PCB Treatment Facility
Made Ready for Redevelopment
Two former PCB Treatment Inc. (PTI) contaminated buildings have been successfully dismantled and are ready for redevelopment without any environmental restrictions.
The buildings, located on Wyandotte Street in Kansas City, Missouri and on Ewing Street in Kansas City, Kansas, were former Environmental Protection Agency (EPA)-permitted facilities that processed transformers and capacitors containing polychlorinated biphenyl compounds (PCBs). Eleven former PTI customers (collectively the PTI Steering Committee – who never owned or operated the sites) entered into a CERCLA Administrative Order on Consent (AOC) with the EPA to conduct removal actions at the sites.
Hard Hat Services (HHS) was selected by the PTI Steering Committee in 2003 as the Supervising Contractor and the Quality Assurance Official. HHS’ responsibility was the complete oversight and management of the project. HHS coordinated and led all contract administration, task management, communications, sampling, procurement, and regulatory reporting. The firm also worked with the regulators, local government and stakeholders to ensure that EPA requirements were met, and that nearby community concerns were addressed.
Each building was constructed of reinforced, cast-in-place concrete with brick infill walls, and was dismantled by breaking the walls, columns, and floors into small pieces and proceeding from the rooftop down to the basements. Mini excavators were used to break up the debris into 6 to 18-inch pieces and skid steers were used to drop the sized rubble through drop chutes to the ground floor for loading and transport to permitted, off-site disposal facilities. The seven-story Wyandotte building produced nearly 19,000 tons of debris, approximately 20 percent of which was considered TSCA (Toxic Substances Control Act) waste, containing greater than 50 ppm of PCBs. In the Ewing building, TSCA areas were delineated by concrete sampling and then scarified and/or cut out before dismantlement. This made the entire dismantlement easier and faster, and reduced the tonnage sent to the hazardous waste facility. As a result, the total TSCA debris hauled from the five-story Ewing building was only 5 percent of the nearly 12,000 tons of debris.
To contain dust and demolition debris, scrim-covered scaffolding was anchored to the outside of the buildings. Personal dust monitors, real time aerosol monitors, and 24-hour composite high volume samplers were used at the site to ensure compliance with dust and PCB levels. Based on this monitoring, both projects were completed without dust excursions from the site and without exceeding regulatory air standards.
Extensive soil testing was conducted after the dismantling to ensure that impacted soils were removed. AOC soil cleanup standards were 1 ppm at the surface, and 10 ppm for the subsurface. In an effort to remove all potential redevelopment restrictions, all soils were removed to below 1 ppm PCBs.
Each site had a unique set of circumstances requiring innovative remediation solutions. The Wyandotte property was located in an area of significant redevelopment, including residential lofts, restaurants, and art galleries. The Ewing property shared common walls with an operating warehouse and a grain facility with an active railroad spur. The railroad was in a contaminated soil area, and therefore was excavated and replaced.
By controlling the schedule, costs, and procedures used during dismantlement, the three year project was completed successfully on-time, without neighbor complaints, and significantly under budget. The completion reports were approved by the EPA, and the properties are now ready for redevelopment.