Facility Site ID: 17392 Cleanup Site ID: 12071

  • Site Status

  • Awaiting Cleanup
  • Brownfield

  • This site has received funding as part of our Brownfields Program.
    Brownfields Public Funding: $54,000.00

Current Status

Boundary of the Site from the east
Boundary of the Site from the east

Last Updated: June 2023

The TECT Aerospace Everett cleanup site (Site) is located on the southeastern portion of Paine Field in South Everett where historical activities, including aerospace manufacturing operations, have resulted in the presence of contaminants in soil, groundwater, and soil gas. An Agreed Order (legal agreement) requires Snohomish County (County), a potentially liable person (PLP), to prevent existing contamination from impacting human health and the environment by investigating and addressing contamination under the Model Toxics Control Act (MTCA).

Ecology held a 30-day public comment period from April 24, 2023, to May 23, 2023, on an Agreed Order, which has been finalized between Ecology and the County. The remedial investigation stage is underway. And investigations to understand the extent of contamination at the Site have been ongoing since 1993.

To view the site fact sheet and other documents, click on the "View Documents" link under Site Details or scroll down to the Documents section. 

Email List

Join our email list to receive updates about the TECT Aerospace Everett cleanup site. Email Kristen Forkeutis, Public Involvement Coordinator, at Kristen.Forkeutis@ecy.wa.gov to be added to the list. Unsubscribe at any time.

Next Steps

Ecology will work with the County to draft a Remedial Investigation Work Plan which will describe further investigations necessary to completely characterize the Site. Data gathered from this investigation will be summarized in a Remedial Investigation (RI) Report. Using the data from the RI Report, a Feasibility Study and Cleanup Action Plan will be prepared to assess potential remedial actions and plan a final cleanup action.

Site Location And Background

Aerial view of TECT Aerospace Everett Site
Aerial view of TECT Aerospace Everett Site

TECT Aerospace Everett is located at, and in the immediate vicinity of, 2933 109th St SW in Everett, WA, 98204 (the Site). This 39-acre Site is located on the southeastern portion of Paine Field in South Everett and is zoned for light industrial use. The Site is owned by the County and currently leased for use by several aerospace manufacturing operations. The Site history is as follows:

  • 1936: Developed into a county airfield by a federal program.
  • 1940-1948: Acquired by the U.S. military. Used by the U.S. Army Air Corps as an air base named Paine Field.
  • 1948-1968: Jointly occupied and used by the County and U.S. Air Force. Redeveloped for aerospace manufacturing operations by the County.
  • 1968-Present: Managed and operated by the County.

The Site consists of a series of existing and former buildings located at Snohomish County Airport (Paine Field):

  • Building C-19 was constructed in 1979 and primarily utilized for aerospace manufacturing. It is currently used for aerospace manufacturing, warehouse storage, and metal fabrication. 
  • Buildings C-20, C-21, C-22, and C-23 were constructed between the 1940s and the late 1980s and used for barracks, warehousing, and aerospace manufacturing. Today, these buildings are unoccupied and scheduled for demolition in 2023. 
  • Building C-29/Former Fuel Farm was constructed before 1947 for chemical storage of aviation fluid. Building C-29 was used for metal fabrication from 1965-1966 and demolished in 1996.

Site Investigation And Contamination

Numerous environmental investigations have been performed on the Site starting in the early 1990s. The focus of these evaluations was to identify contaminants located in the soil, groundwater, and gasses trapped in the soil (soil gas). The following classes of contaminants were found to exceed minimum allowed levels under MTCA:

  • Chlorinated volatile organic compounds (CVOCs): tetrachloroethene (PCE); trichloroethene (TCE); cis-1,2-dichloroethene (cis-1,2 DCE); and vinyl chloride (VC)
  • Petroleum hydrocarbons: Gasoline-(TPH-G), diesel- (TPH-D), and oil-range- (TPH-O) total petroleum hydrocarbons, and benzene
  • Metals: arsenic and chromium

Ecology determined that this Site poses low-to-moderate risk during an evaluation of data in 1997. Rankings are based on the type of contamination identified at the Site and the potential risks to human health and the environment. A review of the Site Hazard Assessment is scheduled for 2024 following completed site characterization.

Previous Cleanup Work (Remedial Actions)

Soil boring and well installation,  Building C-29, Nov 2022
Soil boring and well installation, Building C-29, Nov 2022
Underground Storage Tanks – In 1992 at Building C-29, one 12,000-gallon Underground Storage Tank (UST)—used for storage of aviation fuel—was removed along with 100 cubic yards of contaminated soil. An additional 12,000-gallon UST was planned for removal but could not be located. 

Contaminated Soil Excavation – In 2011 at Building C-19, shallow soil contaminated with TPH-D and TPH-O was excavated from below the building in several limited areas. Ecology issued this portion of the Site a no further action necessary letter in 2013 for soil contaminated with TPH.





General Cleanup Process

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 implements the MTCA site cleanup process and oversees cleanups.

The cleanup process is completed in steps (see graphic below) over a variable timeline.

Formal cleanup process
Formal cleanup process








Requesting Accommodation

To request an ADA accommodation, contact Ecology by phone at 425-240-4353 or email at
Kristen.Forkeutis@ecy.wa.gov, or visit ecology.wa.gov/Accessibility. For Relay Service or TTY call 711 or 877-833-6341.

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

Report An Environmental Issue

Northwest Region Office
Northwest Region Office

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

Legal 3
Document Title Document Date Document Type
TECT Aerospace Everett - Agreed Order 8/30/2023 Agreed Order
TECT Aerospace Everett - Public Review Draft Agree Order 4/6/2023 Agreed Order
TECT Aerospace Everett - Early Notice Letter (Lease Area) 12/10/2018 Early Notice Letter
Public Information 6
Document Title Document Date Document Type
TECT Aerospace Everett - Response to Comments - June 2023 6/5/2023 Responsiveness Summary
TECT Aerospace Everett Fact Sheet_Vietnamese 4/19/2023 Fact Sheet\Public Notices
TECT Aerospace Everett Fact Sheet_Spanish 4/19/2023 Fact Sheet\Public Notices
TECT Aerospace Everett Fact Sheet_Russian 4/19/2023 Fact Sheet\Public Notices
TECT Aerospace Everett Fact Sheet 4/19/2023 Fact Sheet\Public Notices
TECT Aerospace Everett Public Participation Plan 4/19/2023 Public Participation Plan
Technical Reports 15
Document Title Document Date Document Type
TECT Aerospace Everett - Q4 2023 Quarterly Progress Report 1/22/2024 Progress Report
TECT Aerospace Everett - Q3 2023 Progress Report 10/23/2023 Progress Report
TECT Aerospace Everett - Phase III RI/FS Study Data Report 5/16/2023 Site Specific Technical Document - other
TECT Aerospace Everett - NW3328 - Addendum No. 2 - Revised Phase III RI/FS Workplan 7/28/2022 Site Specific Technical Document - other
TECT Aerospace Everett - Final PLP Determination Letter 3/17/2022 Site Specific Administrative Document - other (Administrative correspondence)
TECT Aerospace Everett - Site Investigation Report, Building C-19 Indoor Air Evaluation and Monitoring Well Installation 12/15/2021 Site Specific Technical Document - other
TECT Aerospace Everett—NW3328 Addendum No 2—Phase III RI/FS Work Plan 11/9/2021 Site Specific Technical Document - other
TECT Aerospace Everett - Interim Remedial Investigation Data Report 12/31/2019 Site Specific Technical Document - other
TECT Aerospace Everett - Initial Investigation Field Report / Site Update (Lease Area) 11/15/2018 Initial Investigation Report
TECT Aerospace Everett—NW3328 Draft Remedial Investigation/Feasibility Study Work Plan 9/19/2018 Site Specific Technical Document - other
TECT Aerospace Everett - Notification of Release (Includes Focused Phase II & Indoor Air Results) 2/23/2018 Site Specific Technical Document - other
TECT Aerospace Everett - Building C-19 Chlorinated Solvent Delineation 2/14/2005 Remedial Action Report
TECT Aerospace Everett - Preliminary Contamination Assessment 6/23/1999 Remedial Action Report
TECT Aerospace Everett - Site Hazard Assessment 2/1/1997 Site Hazard Assessment Report
TECT Aerospace Everett - Degreaser Pit Investigation, Building C-19 4/25/1994 Remedial Action Report
Voluntary Cleanup Program 3
Document Title Document Date Document Type
TECT Aerospace Everett - NW3328 - VCP Termination Letter 2/1/2023 VCP Administrative Document
TECT Aerospace Everett - NW3328 - VCP Opinion on Remedial Investigation Work Plan 6/14/2022 VCP Opinion on Remedial Investigation
TECT Aerospace Everett—NW3328 VCP Application Acceptance 3/9/2022 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 9

Contaminant Type
Soil
Groundwater
Surface Water
Air
Sediment
Bedrock
Metals - Metals - Other C
Non-Halogenated Organics - Non-Halogenated Solvents C S
Halogenated Organics - Halogenated Solvents C C S
Metals - Arsenic C
Halogenated Organics - Other Halogenated Organics S
Non-Halogenated Organics - Benzene C C S
Non-Halogenated Organics - Petroleum-Diesel C C
Non-Halogenated Organics - Petroleum-Gasoline C C
Non-Halogenated Organics - Petroleum-Other C C
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.