From the 1930’s through the 1970’s, the Sunshine Laundry and Dry Cleaning Company at Woodlawn and Fourth Ave Northeast did a wonderful job of washing clothes, and a horrible job of disposing of its chemicals. Left in the soil and groundwater (and air) are tetrachloroethene (PCE), trichloroethene, cis-1,2-dichloroethene, trans-1,2-dichloroethene and vinyl chloride. I have no clear idea what these are, but they sound nasty, and the Department of Ecology seems to agree, as they are undertaking a clean-up as part of a consent decree with Lutheran Retirement Home of Greater Seattle (Hearthstone).
The clean-up plan includes:
- Removing two solvent underground storage tanks
- Installing an electrical resistance heating system to remove the solvent contamination in the soil, to an approximately depth of 16 feet below ground surface
- Soil excavation to a depth of 16 feet below ground surface
- Groundwater treatment system (enhanced reductive dechlorination) for the solvent contamination in the groundwater
- Long term groundwater monitoring
If you’d like to keep an eye on what’s going on, or have a say in it, there’s a public comment period on the draft consent decree and clean-up plan April 1st – May 2.