Koppers Co, Inc.

koppers site
Proposed site for hydrologic and habitat restoration along the Ashley River in Charleston, South Carolina

"We're excited to put forward restoration projects that will improve the health and function of wetlands that are so critical and treasured here in South Carolina's Lowcountry."

Krista McCraken

NOAA Restoration Center


Howard Schnabolk
NOAA Restoration Center
Charleston, SC
(843) 740-1328

Koppers Co, Inc.

Hazardous Waste |  Koppers, South Carolina | 1940s – Present


What Happened?

Starting as early as 1942, wood treatment and fertilizer manufacturing facilities were located at the Koppers, Co. site in Charleston, South Carolina. These facilities released hazardous substances into wetland and river habitat in and near the Ashley River. The groundwater at the site was also contaminated, and impacted nearby wetland and river habitat.

In January, 1993, Beazer East, Inc., worked with the U.S. Environmental Protection Agency to investigate conditions at the site and take steps to clean up the contamination. Remedial activities were completed in 2003. The same year, the site was sold to a third party for commercial and mixed use development. 

What Were the Impacts?

Approximately 140 acres of tidal marsh and creeks were impacted by the hazardous material released at the Koppers Site. Contaminants included polycyclic aromatic hydrocarbons (PAHs) consistent with those found in creosote, and heavy metals. The Trustees conducted a natural resource damage assessment and determined that both intertidal and subtidal habitats have been affected by the contamination. Sediment samples showed contaminant concentrations that would be toxic to benthic (bottom-dwelling) invertebrates, including grass shrimp, and possibly fish, birds and mammals.

What’s Happening Now?

On January 7, 2019  the Department of Justice announced that a consent decree for this case was entered into the U.S. District Court for the District of South Carolina. The approximately $3 million settlement will go toward resolving natural resource damage claims and to restore habitats injured by pollution. The final consent decree and other records can be found at the Koppers site administrative record.

The Trustees have released the Final Damage Assessment and Restoration Plan, as well as the Environmental Assessment for the Koppers Site. The plan describes the restoration projects the Trustees propose to implement to compensate the public for injured natural resources once final settlement is reached with the responsible party. The projects focus on salt marsh restoration at sites on the Ashley River and Long Branch Creek in Charleston.


Last updated March 29, 2019