TagEnvironment(185)

A report by the Washington State Department of Ecology’s Air Quality Program examining overburdened communities that are highly impacted by air pollution. The document includes publication information, contact details for regional offices, and ADA accessibility information.

This August 2025 draft report by Haley & Aldrich, Inc., prepared for the Port of Seattle, presents geotechnical and hydrogeological findings for the Industrial Wastewater Treatment Plant (IWTP) Above Ground Basin (AGB) site at Seattle-Tacoma International Airport. The report covers subsurface soil and groundwater conditions, seismic hazard assessments, and engineering design recommendations for elements such as slopes, embankments, and excavation support. It serves as a technical reference to guide construction and infrastructure decisions at the airport site.

A June 2025 arborist report by Tree Solutions Inc. inventoried and assessed 181 trees across ten Port of Seattle parcels at the AGB Site near SeaTac Airport, finding the site largely dominated by red alders, black cottonwoods, and invasive plant species following demolition of previous buildings. The report identifies one notable high-value western redcedar (Tree 470, 31.8 inches in diameter) and outlines tree replacement requirements under Port of Seattle Resolution 3821, which mandates a 4-to-1 replacement ratio for any regulated trees removed during future construction. The report is preliminary, as no design or construction plans had been reviewed at the time of writing.

WSP conducted a wetland verification study in May 2025 to confirm the accuracy of a 2022 wetland delineation near the Seattle-Tacoma International Airport's Industrial Wastewater Treatment Plant (IWTP), which is being expanded to increase treatment capacity and meet permit requirements. The study assessed three previously identified wetlands — IWS-A, IWS-B, and WL28 — all located within the Lagoon 3 Study Area, ranging in size from 0.54 to 29.7 acres. The verification was conducted to ensure the existing delineation boundaries remain valid for environmental permitting purposes ahead of planned construction.

This guidance document from Ireland's Environmental Protection Agency explains the regulations around PFAS chemicals — particularly PFOA and PFOS — found in aqueous film-forming foam (AFFF) used in fire suppression systems and extinguishers. It outlines a phased timeline of restrictions, culminating in a full ban on AFFF containing PFOA by July 4, 2025, and details the steps organizations must take to check their systems, notify the EPA, and properly dispose of non-compliant foams. Businesses holding more than 50 kg of such foam at any location are required to report their stockpiles annually to the EPA via its EDEN portal.