Abstract

Environmental Impact and Disposal of CCA-Treated Wood Waste

Author(s): Parker, A. ;  Bricka, R.

Wood products are treated with preservatives to prohibit degradation by a multitude of organisms and to prolong the products’ life in adverse environments. The most widely used wood preservative since the early 1970’s has been chromated copper arsenate (CCA), resulting in nearly 80% of all treated wood products in North America being treated with CCA. In 2002 the wood preservative industry voluntarily adopted a restricted consumer use policy, and by late 2003 CCA-treated wood was limited to industrial applications due to concerns over possible exposure to toxic substances. Due to the restricted use policy, it is estimated that as much as 24 million tons of CCA may be available for disposal by 2020. Until recently, landfilling the out of service CCA-treated material was the accepted method of disposal. However, problems associated with soil and groundwater contamination, directly linked to the leaching of CCA-metals from landfills, have generated the need for a more effective and efficient disposal method for CCA-treated wood waste. Alternative approaches to CCA-treated wood disposal include utilizing advanced sorting techniques to place the treated wood waste in hazardous waste landfills, using chemical extraction to remove the CCA-metals, and employing thermochemical conversion processes to isolate the CCA-metals and reduce waste volume. This paper will provide detailed information on the environmental impact and disposal of CCA-treated wood waste, including environmental standards, test methods, and discussion of on-going research.







 

Technical Presentations

  • Delta Water Quality
  • Delta Water and Agriculture
  • Wetlands
  • Water Quality
  • Sediments
  • Non-Point
  • Management and Sustainability
  • Wood Treatment
  • Modeling
  • Soil and Water Treatment

Workshops

Responsible Site Design: Implementing Innovative Stormwater Management Strategies

The primary goal of the workshop is to create a dynamic learning experience that examines the role of stormwater management in the built environment. The workshop will focus on integrating ecologically sound water management approaches into site design. After the workshop, attendees will be familiar with the following concepts and technical issues:

  • Knowledge of the stormwater treatment chain
  • Knowledge of the impact of land use codes on stormwater management
  • Application of a design process that mitigates the effects of stormwater on-site
  • Knowledge of the relationship between land use codes and design for innovative stormwater management

Information

For information contact:
Jessie Schmidt
MWRRI
Box 9680
Mississippi State, MS 39762
662-325-3295
jschmidt@cfr.msstate.edu