Grand Street Commons
1750 22nd Ave S, Seattle, WA 98144

Aerial view of Grand Street Commons Cleanup Site
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Updated April 2021

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 Ecology is hosting a public comment period from April 12 – May 11, 2021 to get input on the following cleanup documents for the Site
Prospective Purchaser Consent Decree (PPCD) – directs GSC to implement the cleanup at the Site. 

Remedial Investigation / Feasibility Study Report (RI/FS) – describes contamination at the Site, evaluates cleanup alternatives, and recommends a preferred cleanup alternative.

Draft Cleanup Action Plant (CAP)
 – Ecology’s plan that describes the cleanup work to address contamination at the Site. 

State Environmental Policy Act – Determination of Non-Significance (SEPA) – Ecology’s determination that the cleanup work is not likely to harm the environment.

Online public meeting

In consideration of public health and safety, Ecology will hold an online public meeting to provide more information and answer questions.  Registration required.
Wednesday, April 28, 2021       
6:30 – 7:00 pm: presentation       
7:00 – 7:30 pm: question and answer session

Registration details here

Factsheet 2021


Grand Street Commons, LLC purchased this area to be redeveloped as a transit-oriented mix of affordable and market rate housing near the planned Judkins Park Link Light Rail Station. The development will include approximately 314 units of affordable housing as well as 420 market rate apartments. The redevelopment will include some retail space and underground parking.

Site Location

The Grand Street Commons Site is located in the Judkins Park neighborhood of Seattle.  The Site consists of 17 King County parcels totaling about 3.3 acres, divided into three areas: the West Block, the East Block, and the South Block (see above figure).

Site History

The Site has been used for manufacturing, commercial dry cleaning and vehicle repair and painting. Over the last several decades, businesses operating there released hazardous substances into soil and groundwater.

Belshaw Brothers, Inc. (BBI) operated a commercial facility that produced bakery and restaurant equipment from 1924-2000’s. The facility included a paint building, welding shop, an on-site foundry used for aluminum parts casting, warehouses, production buildings, and an unpaved parking lot. At least three underground storage tanks (USTs) released petroleum products to the soil that migrated to and impacted shallow groundwater at the Site.

The parcel in the northwest corner of West Block was occupied by multiple commercial and light industrial facilities from the early 1950s to the present. Penthouse Drapery Cleaners (Penthouse) occupied this parcel for a commercial dry cleaning operation from the 1980’s through the mid-1990’s. From 1998-2020 Seattle Collision Center, which operated a vehicle repair and painting business, occupied the former Penthouse property. In 2018 Penthouse performed an independent cleanup through Ecology’s Voluntary Cleanup Program (project #NW2278) by conducting an interim action.  Electrical Resistance Heating (ERH) was used to remove some of the chlorinated solvents from soil and groundwater on the West Block.


Operations from the former drycleaner and former manufacturing led to contaminated soil and groundwater in many areas of the Site. Some contaminants also released vapors into the air. During the remedial investigation, the following contaminants of concern (COCs) were identified for soil and shallow groundwater at the Site above the state Cleanup levels:       

• Soil: Total Petroleum hydrocarbons (TPH) in the gasoline range (TPH-G), diesel-range hydrocarbons (TPH-D), cadmium, lead, and trichloroethene (PCE)      

• Groundwater: PCE, trichloroethene (TCE), vinyl chloride (VC), 1,4-dioxane, gasoline range (TPH-G), diesel-range hydrocarbons (TPH-D), benzene, xylenes, and arsenic
These contaminants were found at levels that exceed allowable standards under the state’s cleanup law, the Model Toxics Control Act (MTCA Chapter 70.015D RCW), and therefore must be addressed during the cleanup action. Cis-1,2-dichloroethene was also found in the groundwater but at concentrations below applicable cleanup levels under MTCA.


The Model Toxics Control Act (MTCA; Chapter 70.105D RCW 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 (see graphic below) over a variable timeline. 

Please click on the photo for a larger view


Map showing site location as King County, WA SITE INFORMATION


View Electronic Documents

Cleanup Site Details Report

Facility Site ID: # 97763114

Cleanup Site ID: 3018

Seattle, King County

Status: Cleanup Started   Get definitions of Status terminology

Sandra Matthews
Site Manager
(425) 649-7206

Kelsey Ketcheson
Public Involvement Coordinator
(425) 240-4353

Document Repositories:

Northwest Regional Office
3190 160th Ave SE
Bellevue, 98008-5452