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Environmental Quality Control (EQC)

Pinewood Site

Site History

The Pinewood Site operated as a claystone mine from 1972 to 1978. In 1978, it began operating as a landfill. After November 1980, it operated as a hazardous waste site when the South Carolina Hazardous Waste Management Regulations became effective. The site stopped receiving waste (both hazardous and non-hazardous) in 2000 and closed in 2003 following a bankruptcy settlement. All landfill cells at the site have been closed and capped.

The bankruptcy settlement appointed Kestrel Horizons, LLC (Kestrel) as Trustee for the Pinewood Site. As Trustee, Kestrel is responsible for day-to-day activities at the site, such as management of leachate, groundwater monitoring, and maintenance of the landfill caps. The site will remain in post-closure care for at least 100 years.

What is Leachate?

  • Water that collects contaminants as it drips through waste in a landfill.
  • Typically contains 90% water and 10% contaminants.
  • Includes solid particles such as sand.
  • Leachate is not contaminated groundwater.

Leachate must be pumped out of the landfill to prevent overfill. A Leachate Collection System collects the leachate and pumps it out.

Current Leachate Management

Leachate generated by the landfill requires collection, storage and disposal.  A new onsite leachate treatment system began operation in April 2013. Leachate is collected from the three main landfill sections, temporarily stored in an area onsite, and then pumped to the leachate treatment system for treatment.  Solids that remain from treating the liquid leachate are shipped offsite for proper disposal. 

Groundwater Monitoring

Groundwater monitoring is conducted on a routine basis around the closed landfill cells to determine groundwater quality. No releases from the landfill cells have been detected in the groundwater.

Stormwater is collected and discharged in accordance with Pinewood’s current National Pollutant Discharge Elimination System (NPDES) permit.

Completed Improvement Projects

Many improvement projects have been completed at the Pinewood Site, including:

  • Stormwater management updates.
  • Power system and electrical upgrades.
  • Updated computer control system for managing leachate.
  • Leachate storage upgrades.
  • Construction of an onsite leachate treatment system.