Coit Services

16750 Woodinville Redmond Rd NE Woodinville, King County
Facility Site ID: 36189742
Cleanup Site ID: 16672

  • Site Status

  • Awaiting Cleanup

More about cleanup

Status Update

This Site is in the Voluntary Cleanup Program (VCP).

Ecology received the Additional Investigation Report, Building C at Woodinville West Business Park on October 12, 2023.  Ecology issued an opinion letter regarding the site on February 8, 2024. 

Site Location

The site is located at 16750 Woodinville-Redmond Road in Woodinville (the Property). It is immediately west of the Sammamish River. It was developed in 1999 as a business park. It has been used for light industrial businesses since then. 

Where Did The Contamination Come From?

Drill rig sampling soil below Building C, April 2022
Drill rig sampling soil below Building C, April 2022

Coit Cleaners operated a dry-cleaning machine at the Site from 1999 to 2007. Samples show contamination is associated with a dry-cleaning machine which used tetrachloroethylene (PCE). PCE was also discovered to the north of the building around an oil-water separator in a loading dock.

As a result of use of PCE for dry cleaning, the site is contaminated with PCE and breakdown products cis-1,2-dichloroethene and vinyl chloride (collectively CVOCs). Contamination at the site was first found during investigations in 2019. Soil, groundwater, and soil vapor samples were all found to contain CVOCs above the levels allowed by Washington State’s cleanup law, the Model Toxics Control Act (MTCA). Surface water samples collected from the Sammamish River in August 2023 did not contain
CVOCs.

What Has Been Done So Far To Cleanup The Site?

Planned cleanup at the site includes injection of emulsified oil into the soil and groundwater. Oil will help naturally occurring bacteria thrive and aid in breaking down CVOCs. Soil and groundwater sampling will be conducted after the cleanup action to ensure it was successful. Further cleanup actions will occur if necessary.

Contaminants Of Concern

  • Tetrachloroethylene; cis-1,2-dichloroethene; and vinyl chloride into the Soil.
  • Vinyl chloride into the Groundwater.

    • What Happens Next?

    Soil and groundwater sampling will be conducted after the cleanup action to ensure it was successful. Further cleanup actions will occur if necessary.

    Model Toxics Control Act

    The Model Toxics Control Act (MTCA) is Washington’s environmental cleanup law. It provides requirements for contaminated site cleanup and sets standards that protect human health and the environment. Ecology enacts the MTCA and oversees cleanups.

    ​The MTCA site cleanup process is completed in steps over a variable timeline.

    Learn More How Ecology Is Protecting The Environment In Your Community

    What's In My Neighborhood shows contamination cleanup sites in Washington state. Ecology works to clean up these sites to protect the health of people and the environment. Cleanups are construction projects that remove, treat, or contain potentially harmful substances.

    Report An Environmental Issue

    To report an environmental problem or concern, any time, day or night, use the online reporting form.

    Counties: Island, King, Kitsap, San Juan, Skagit, Snohomish, and Whatcom
    Email:     nwroerts@ecy.wa.gov
    Phone: 206-594-0000

    Requesting Accommodation

    Ecology is committed to providing people with disabilities access to information and services. To request an ADA accommodation, contact Ecology by phone at 360-407-6831 or email at ecyadacoordinator@ecy.wa.gov. For Washington Relay Service or TTY call 711 or 877-833-6341.  Visit Ecology’s website for more information.

    ​If you speak a non-English language, free language services are available.

    Voluntary Cleanup Program

    This site is in our Voluntary Cleanup Program, which provides technical help to owners of contaminated sites.

    Voluntary Cleanup Program customers pay fees to cover our costs for technical help and reviewing cleanup reports. Sites in this program must meet the same cleanup standards as sites Ecology manages under legal orders.

    Places to see print documents
    Legal 1
    Document Title Document Date Document Type
    Woodinville West Business Park - Early Notice Letter 9/23/2022 Early Notice Letter
    Technical Reports 10
    Document Title Document Date Document Type
    Coit Services - Remedial Action Work Plan 11/26/2024 Site Specific Technical Document - Other
    Coit Services - SHARP Report 8/21/2024 SHARP Report
    Coit Services - Final Additional Investigation Report 8/7/2024 Site Specific Technical Document - Other
    Coit Services - TEE Form 8/7/2024 Terrestrial Ecological Evaluation
    Woodinville West Business Park - NW3377 Additional Investigation Report 10/12/2023 Site Specific Technical Document - Other
    Woodinville West Business Park - NW3377 Remedial Investigation And Focused Feasibility Study Report 6/20/2023 Remedial Investigation / Feasibility Study Report
    Woodinville West Business Park - Initial Investigation Field Report 7/11/2022 State Initial Investigation Report
    Woodinville West Business Park - Notification of Recently Discovered Historical Release 6/7/2022 Site Specific Administrative Document - Other (Administrative Correspondence)
    Woodinville West Business Park - NW3377 Phase II Indoor Air Quality And Subsurface Assesment 12/29/2021 Site Specific Technical Document - Other
    Woodinville West Business Park - NW3377 Phase II ESA 12/16/2019 Site Specific Technical Document - Other
    Voluntary Cleanup Program 4
    Document Title Document Date Document Type
    Coit Services - VCP Opinion on Injection Work Plan 1/8/2025 VCP Opinion on Site Cleanup – Other
    Coit Services - VCP Opinion on Additional Investigation 8/29/2024 VCP Opinion on Site Cleanup – Other
    Coit Services - VCP Opinion on RI/FFS 2/8/2024 VCP Opinion on Remedial Investigation
    Coit Services - VCP Acceptance Letter & Application Forms 12/20/2023 VCP Administrative Document
    There may be more documents related to this site. To obtain documents not available electronically, you will need to make a public records request.

    Places to see print documents

    • Northwest Regional Office
      15700 Dayton Ave N
      Shoreline, 98133
      Please schedule an appointment to view print documents at this location.

    Contaminants 1

    Contaminant Type
    Soil
    Groundwater
    Surface Water
    Air
    Sediment
    Bedrock
    Halogenated Organics - Halogenated Solvents C C B
    S
    Suspected
    C
    Confirmed Above Cleanup Levels
    B
    Below Cleanup Levels
    RA
    Remediated-Above
    RB
    Remediated-Below
    R
    Remediated
    This contaminant list was based on our best information at the time it was entered. It may not reflect current conditions at the site.