Superfund Information Systems: Site Profile

Superfund Site:

MARTIN-MARIETTA, SODYECO, INC.
CHARLOTTE, NC

Cleanup Activities

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Background

The 5-acre Martin-Marietta, Sodyeco, Inc. site is located in Charlotte, North Carolina. It includes an area where industrial and landfill operations have taken place since the 1930s. EPA placed the site on the Superfund program’s National Priorities List (NPL) in 1983 because of contaminated groundwater and soil resulting from facility operations. EPA, the North Carolina Department of Environment and Natural Resources (NCDENR), and Clariant Corporation, the site’s primary potentially responsible party (PRP), have investigated site conditions and taken steps to clean up the site in order to protect people and the environment from contamination. Site contamination does not currently threaten people living and working near the site. By treating groundwater, placing institutional controls on the site property and undertaking Five-Year Reviews, EPA, NCDENR and the site’s PRP continue to protect people and the environment from site contamination.

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What Is Being Done to Clean Up the Site?

 

Clariant, the site’s primary PRP, leads site investigation and cleanup activities, with oversight provided by EPA and NCDENR.

In 1973, the site’s PRP cleaned one of the two wastewater ponds in Area D. In 1976 and 1977, the PRP cleaned the remaining wastewater pond and installed a lined freshwater pond. From 1981 to 1983, the PRP dug up three pits containing wastes in Area C and disposed of the materials at an off-site landfill. Then, the PRP regraded the dug-up areas and planted grass. In 1989, the PRP completed installation of the asphalt cap over Area B.

In 1990, the PRP installed the groundwater pump-and-treat system and 11 recovery wells, and also found additional buried drums, wastes and contaminated soil in Area C. The PRP dug up the drums and contaminated soil, emptied the drums, disposed of the drums and disposed of the contents of the drums using a fuel blending process. In 1999, the PRP dug up contaminated soil and treated it off site, after which EPA issued a Preliminary Close-Out Report for the site in 1999.

EPA completed the site’s third Five-Year Review in 2012. It found that the cleanup continues to protect people and the environment in the short term. For site remedies to be protective over the long term, additional maintenance of the cap is required along with additional administrative work to address land use restrictions. EPA plans to complete the next Five-Year Review in 2017.

The site’s PRP continues to operate the pump-and-treat system under the RCRA program. EPA removed the site from the NPL in 2012.

 

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What Is the Current Site Status?

 

In 1987, EPA issued the site’s long-term cleanup plan. It included using a pump-and-treat system at the site to extract, treat and discharge contaminated groundwater from all five areas of the site; digging up soil from Area D and incinerating it off site; placing a cap over Area B; and performing treatability studies on Area C to determine the cleanup activity for the area.

In 1994, EPA revised the cleanup plan, selecting soil flushing as the cleanup activity for Area C. The plan included flushing soil with water, capturing the water and treating it in the groundwater treatment system. In 1998, EPA revised the cleanup plan again, selecting off-site treatment and disposal to address stockpiled contaminated soil in Area C. EPA issued a third revision to the cleanup plan in 1998, correcting the estimated quantity of soils addressed by cleanup activities. In 2011, EPA removed groundwater cleanup activities from the cleanup plan and called for the placement of institutional controls on the site property.

The site’s PRP continues to operate the pump-and-treat system under the RCRA program. EPA deleted the site from the NPL in January 2012. The EPA completed the last Five-Year Review in 2012.

 

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EPA’s Involvement at the Site

The 5-acre site is part of a 150-acre production facility area located on Highway 27, approximately 10 miles west of Charlotte in Mecklenburg County, North Carolina. The Resource Conservation and Recovery Act (RCRA) regulates the site and the larger facility area. The Clariant Corporation owns the facility property, including the site. The site includes five areas: Areas A through E. Grass-covered and forested areas border the site to the north, south and east. The Catawba River borders the site to the west. The City of Mount Holly and residential areas are located west of the site, across the Catawba River. From the 1930s to 1973, Area A operated as an on-site landfill. In 1936, DyeStuff Company began operations producing liquid sulfur dyes at the site. In 1958, American Marietta, which later became Martin Marietta, purchased the site. Martin Marietta produced vat dyes, disperse dyes and specialty chemical products for the agrochemical, electronic, lithographic, pigment, plastic, rubber and general chemical industries. From 1973 to 1978, Area B operated as an on-site landfill. In 1983, Sodyeco Inc. purchased the site property. Sodyeco Inc.’s operations produced waste streams that the company discharged to the Catawba River. Parties disposed of residual distillation tars, empty drums and cartons, discarded chemicals, off-specification products, general plant wastes and construction debris at the site. In 1983, the EPA listed the site on the NPL. Industrial operations are located on site. Parties are also evaluating the site as the location for ReVenture Park, an eco-industrial park.

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Enforcement Information

The EPA negotiated legal agreements with the site’s PRP to investigate and clean up the site. The PRP conducted cleanup activities after the EPA issued the ROD under the authority of the RCRA program. Cleanup activities continue under the PRP’s RCRA post-closure permit. The PRP continues to fund site cleanup, monitoring and oversight activities.

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