This indicator tracks the progress toward completing cleanup work, known as "corrective actions," at 39 priority dangerous waste treatment, storage, and disposal facilities in Washington.
What is a TSD?
Dangerous waste treatment, storage and disposal (TSD) facilities are permitted by the state to treat, store, or dispose of large amounts of dangerous waste either generated on-site or collected from other businesses. "Corrective action" is the term used for cleaning up contamination at TSDs.
Why we manage TSDs
When dangerous or hazardous wastes are mismanaged, they get into water and soil where they may harm human health and the environment, or cause costly cleanup sites. While Washington has had more than 6,400 toxic sites reported as cleaned up, there are nearly 300 new sites reported each year. The costs of cleaning up toxic sites range from tens of thousands to millions of dollars per site. Most cleanup costs are recoverable from property owners. However, when responsible parties aren't able to pay for cleanups, the burden often falls to taxpayers.
We want TSDs in Washington cleaned up before they close so that cleanup costs are not passed on to the residents of Washington. Contaminated sites of any kind pose environmental and health risks and cleanup can reduce or eliminate those risks. This also helps avoid sites being abandoned.
There is a long history of industrial use at corrective action sites, and most sites were operating before permits were required. In fact, many of them were never issued a permit as an operating TSD, and instead discontinued dangerous waste-handling activities once permits were necessary. These sites are still required to clean up contamination through a closure plan and corrective action.
Today, three operating, permitted Washington TSDs are also corrective action sites. While there will always be some level of risk from any activity that handles dangerous materials or wastes, today's permit requirements minimize the potential for release. This maximizes the chances of avoiding new cleanup sites. Operating TSDs are required to notify us of releases and conduct any cleanup necessary.
Priority cleanup sites
Cleanups are proceeding or have been completed at 39 priority TSDs designated as "significant" by the U.S. Environmental Protection Agency (EPA). We expect to complete cleanup at these facilities or have them in maintenance mode by 2020. Maintenance includes actions such as maintaining the integrity of structures and equipment, continued groundwater monitoring to ensure the remedy is working, and reviewing institutional controls regularly.
The EPA uses two Environmental Indicators to track changes in the quality of the environment at corrective action sites:
- Current human exposures to contamination: progress on human exposures means reduced or no human contact with contaminants in concentrations exceeding established risk-based levels.
- Migration of contaminated groundwater: progress on migration of contaminated groundwater means that the movement of contaminated groundwater has stabilized and not expanded.
In Washington, human exposures to toxic substances are under control at 88 percent of TSDs, while migration of contaminated groundwater is under control at 85 percent of these TSDs. EPA's 2015 national goals for these measures are 90 and 79 percent, respectively.