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Martin-Marietta, Sodyeco, Inc.

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CERCLA Area C

Additional Resources
Site Summary Profile
EPA ID: NCD001810365
Location: Charlotte, Mecklenberg County, NC
Lat/Long: 35.294450, -081.000000
Congressional District: 09
NPL Status: Proposed: 12/30/82; Final: 09/08/83
Affected Media: Ground water, Soil
Cleanup Status: Construction complete – physical cleanup activities have been completed
Human Exposure Under Control: Yes
Groundwater Migration Under Control: Yes
Sitewide Ready for Anticipated Use: Yes
Site Reuse/Redevelopment: In reuse – an industrial facility is located on site
Site Manager: Michael Townsend (townsend.michael@epa.gov)


Current Site Status

The Martin-Marietta, Sodyeco, Inc. site includes an area where industrial and landfill operations have taken place since the 1930s. EPA placed the site on the National Priorities List (NPL) in 1983 because of contaminated ground water 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 ground water, 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.

Site Location and Background

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, 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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Threats and Contaminants

Site investigations found contamination in ground water and soil that could potentially harm people in the area. Contamination resulted from facility operations and waste handling practices at the site.  Contaminants of concern include volatile organic compounds (VOCs), chlorobenzene, ethyl benzene, toluene, xylene, tetrachloroethylene (also known as PCE or PERC) and trichloroethylene (TCE).

The site’s PRP has cleaned up soil contamination at the site. The PRP placed institutional controls on the site property to limit digging into subsurface soil and disturbing the cap. Fencing surrounds areas where the PRP treated contaminated soil.

Ground water contamination remains within the facility boundary. No residences use wells affected by ground water contamination.

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Investigation and Cleanup Responsibility / Oversight

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

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Site Cleanup Plan

In 1987, EPA issued a cleanup plan (a Record of Decision, or ROD) for the site. The plan included the following activities:

In 1994, EPA issued an Explanation of Significant Differences (ESD) to select soil flushing as the cleanup activity for Area C. The plan included flushing soil with water, capturing the water and treating the water in the ground water treatment system.

In 1998, EPA issued a second ESD to select off-site treatment and disposal as the cleanup activity to address stockpiled contaminated soil in Area C.

In 1998, EPA issued a third ESD to correct the estimated quantity of soils addressed by cleanup activities.

In 2011, EPA issued an amendment to the cleanup plan (a ROD Amendment) to remove ground water cleanup activities from the cleanup plan and to call for the placement of institutional controls on the site property.

Summaries of site cleanup approaches are also available online in key site cleanup documents, including the ROD.

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Cleanup Progress

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 until 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 ground water pump-and-treat system at the site and 11 recovery wells. The treatment portion of the system uses the existing RCRA treatment facility on site. The RCRA treatment facility uses aeration and living organisms to break down contamination in ground water.  

In 1990, the PRP 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 397 tons of contaminated soil and treated it off site.

EPA issued a Preliminary Close Out Report for the site in 1999.

The site’s third Five-Year Review, completed in 2007, found that the cleanup continues to protect people and the environment in the short term. In order for the cleanup to be protective over the long term, the Five-Year Review recommended additional work.  

The PRP studied the issue of extraction well effectiveness and installed additional extraction wells to address the recommendations in the Five-Year Review. Under its RCRA post-closure permit, the PRP will continue to evaluate the issue.

Summaries of cleanup activities are also available in Five-Year Reviews online.

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Enforcement Activities

EPA negotiated legal agreements with the site’s PRP to investigate and clean up the site.

The PRP conducted cleanup activities after 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.

The ROD and Five-Year Reviews online provide additional information on specific legal agreements for the site.

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Community Involvement

EPA has worked with the community and its state partner to develop a long-term cleanup plan for the site, reflecting the Agency’s commitment to safe, healthy communities and environmental protection. Community engagement and public outreach are core components of EPA program activities.

EPA has conducted a range of community involvement activities to solicit community input and to make sure the public remains informed about site activities throughout the cleanup process. Outreach efforts have included public notices, interviews and information meetings. EPA also held a public meeting at Mount Holly City Hall to discuss the Proposed Plan for the ROD Amendment in May 2011.

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Future Work

The site’s PRP continues to operate the pump-and-treat system under the RCRA program.

EPA is working to delete the site from the NPL.

EPA completed the last Five-Year Review in 2007 and plans to complete the next Five-Year Review in 2012.

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Additional Information

EPA keeps additional site documents and information in a site information repository at the location below. EPA also posts site documents, when available, on EPA’s CERCLIS Site Profile page. For documents not available on the website, please contact the Region 4 Freedom of Information Office.

Site Repository

Mt. Holley Public Library
235 West Catawba Ave.
Mt. Holley, NC 28120

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