Contaminated groundwater under and near a SeaTac property would receive cleanup with a combination of below-ground air injection, vapor removal, and natural bacterial action, under a proposal submitted for public comment by the Washington Department of Ecology (Ecology) and the site's current and former owners.

Ecology also seeks comment on related documents that report on studies of the site's contamination, evaluate cleanup options, and determine that the cleanup would not have a significant adverse impact on the environment.

The parcel - owned by Sea-Tac Investments LLC, ANSCO Properties, LLC, and Scarsella Bros. Inc., -- is located at 16025-16223 International Blvd. The site has no connection with Sea-Tac Airport, nearby.

The property has had various occupants and businesses, including a construction yard and tenants who installed underground fuel tanks. Sampling studies show that contaminants related to gasoline affect ground water under the property's north end and a surrounding area. A cleanup of contaminated soil occurred in 2001, and pavement on the site prevents people from coming into contact with soil and vapors from the contaminated underground water and soil.

The cleanup system will operate for an estimated five years, to be followed by additional monitoring.

A public comment period on the cleanup proposal and related materials will remain open through May 31. For more details and background on this proposal, please see Ecology's fact sheet on the Internet at:
http://www.ecy.wa.gov/pubs/1109167.pdf.

For information on the Sea-Tac Development site overall, including the agreed order and public participation plan, please see:
http://www.ecy.wa.gov/programs/tcp/sites/seaTacDev/seaTacDev_hp.html