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State proposes removing Kent property from Hazardous Sites List
The state Department of Ecology proposes to remove a Kent property from the Hazardous Sites List.
The area is known as the Olympic Steamship Co. Inc., Site at 8220 S. 212th St., a commercially zoned property of 16.7 acres. It is a warehouse building with a paved asphalt parking lot.
DOE officials ranked the site a three in 1999. One represents the greatest potential threat to human health and the environment and five represents the least potential threat.
The site was cleaned up under the Voluntary Cleanup Program. Under the program, property owners can clean up their own property to meet the state cleanup standards. Ecology provides technical and regulatory review assistance. Ecology has determined that the cleanup work at the site meets the requirements of state cleanup regulations.
Anyone who wants to comment about the proposed removal of the site from the list can contact Dale Myers, site manager at email@example.com or call 425-649-4446. The comment period ends Oct. 29.
The site contained four underground storage tanks at different parts of the property. One tank contained waste oil. Two tanks contained leaded and unleaded gasoline, respectively, and another held diesel fuel. Petroleum contamination (gasoline and diesel) was found in soil and groundwater at three of the tanks.
In the early 1990s, cleanup consisted of decommissioning and removal of all four underground storage tanks. The waste oil tank had no signs of leakage and therefore soil and groundwater were not investigated.
In June 1993, the Olympic Steamship property underwent supplemental remedial activities which included excavation of all the remaining contaminated soil. Conditional Points of Compliance for groundwater were re-established along the property boundary. Groundwater monitoring resumed on the Olympic Steamship property at that time.
In 2010, groundwater monitoring showed that concentrations of petroleum hydrocarbons no longer exceeded state cleanup levels. Five additional quarters of groundwater monitoring were completed. During this time, the concentrations of diesel in groundwater remained below state cleanup standards. Olympic Steamship requested a No Further Action determination for the site.
After the 30-day comment period, DOE will review and respond to the public comments received. If no significant changes are made, the site will be removed from the Hazardous Sites List.