We invite your comments on removing this site from the Hazardous Sites List.
The Wesmar Company Inc site is located at 1401 and 1451 NW 46th, Seattle. The property is in a commercial/industrial area in the Ballard neighborhood. Block at Ballard II, LLC currently owns the property, which was occupied by Wesmar Company, Inc. and Color Tech. Inc. between 1979 and 2007. Wesmar was a chemical product manufacturer and distributor, and Color Tech was a metal coating service. The Pacific Coast Pipe Company operated at this site from 1905 to 1917, and used and stored creosote (a wood preservative). The property is now a multi-story mixed-use commercial/retail complex with street level parking and one floor of underground parking lot.
In 2008, Ecology completed a Site Hazard Assessment (SHA) on the site. The SHA ranking estimated the potential threat to human health and the environment relative to other sites in Washington State. The result was a ranking of “5” on a scale of 1 to 5, where “1” represents the highest risk and “5” represents the lowest risk.
During 2018–2019, the following contaminated materials were removed from the property:
- 41,859 tons of carcinogenic polycyclic aromatic hydrocarbon (cPAH) contaminated soil.
- 2,942 tons of concrete.
- 102 tons of arsenic and cPAH contaminated wood waste debris.
- 3.6 million gallons of groundwater and construction dewatering water.
- One abandoned underground heating storage tank. The tank was decommissioned. No release of heating oil was found.
All contaminated materials were properly disposed of at permitted disposal facilities.
This site was cleaned up under a Consent Decree between Block at Ballard II, LLC and Ecology. The concentrations of chemicals of concern in soil and groundwater no longer pose a threat to human health and the environment. Environmental protection is now in place at the site. Ecology has determined that the cleanup action at the site meets the state cleanup regulations.
A site may be removed from the Hazardous Sites List only if the site is cleaned up to the standards set in Washinton's cleanup law, the Model Toxics Control Act. In some cases, long-term monitoring and periodic reviews may be required to ensure the cleanup is adequate to protect the public and the environment. We hold a public comment period for any site we propose to remove from this list.