TagACC(1534)

In a 1996 letter to the Federal Aviation Administration, the U.S. Environmental Protection Agency (EPA) Region 10 raised concerns about air quality impacts from the proposed Master Plan expansion at Seattle-Tacoma International Airport, noting that the project was projected to worsen carbon monoxide levels at nearby intersections in violation of federal air quality standards. The EPA called for a comprehensive emissions inventory, a comparison of air quality with and without the project, and enforceable mitigation measures, while also highlighting inconsistencies in air quality modeling across multiple related development projects in the airport area. The agency urged the FAA and Port of Seattle to coordinate data sharing with regional authorities and establish a long-term air quality monitoring program to address cumulative impacts from surrounding projects.

A 1996 air quality review commissioned by the Airport Communities Coalition challenges the FAA's finding that Sea-Tac Airport's Master Plan Update would not worsen air pollution. Envirometrics, Inc. found that if the proposed third runway increased airport operations—by up to 33% annually and 50% during peak hours—carbon monoxide (CO) and nitrogen dioxide (NO₂) levels would exceed federal air quality standards at multiple locations near the airport. The report concludes that these increased emissions from greater aircraft and vehicle traffic would delay attainment of ambient air quality standards in the surrounding communities.

Washington State Department of Ecology, Shorelands and Water Resources Program, Publication No. 96-06 (April 1996). Guidance document titled ‘Water Quality Guidelines for Wetlands: Using the Surface Water Quality Standards for Activities Involving Wetlands.’ Provides direction on applying Washington State surface water quality standards to activities involving wetlands. Administrative Record number AR030803, Exhibit-2024.

EPA Superfund publication 9355.4-23 (April 1996), ‘Soil Screening Guidance: User’s Guide,’ issued by the United States Environmental Protection Agency Office of Solid Waste and Emergency Response, Washington DC 20460. Exhibit AR033734. Includes Table C-4 presenting metal Kd values (L/kg) as a function of pH for metals including arsenic (Ag), barium (Ba), beryllium (Be), cadmium (Cd),

Washington State Department of Ecology publication #94-145 (updated 1/96) presenting the February 1996 annual update to the MTCA (Model Toxics Control Act) Cleanup Standards under CLARC II. Covers Method B and Method C cleanup levels for soil and groundwater, reference doses (RfD), cancer potency factors, hazard quotients, WAC 173-340-740 and WAC 173-340-745 calculations, inhalation correction

Final Environmental Impact Statement (EIS) prepared jointly by the Federal Aviation Administration (FAA) Northwest Mountain Region and the Port of Seattle for the Seattle-Tacoma International Airport (Sea-Tac) Master Plan Update, dated February 1996, AR038744. Covers proposed development actions 1996-2020 including a new third parallel runway (Runway 16X/34X) up to 8,500 feet long separated 2,500 feet

These three pages from the Washington State Department of Ecology document the delegation of signature authority to staff member Tom Luster, allowing him to issue routine Section 401 water quality certifications, Coastal Zone Management consistency determinations, and related administrative orders. Originally signed by Director Mary Riveland in December 1995, the authority was reaffirmed by Director Tom Fitzsimmons in February 1997. The delegation includes a succession of authority chain to ensure continuity if Luster is absent or leaves his position.

A 1995 Washington Department of Ecology staff discussion paper analyzes regulatory challenges in applying the NPDES permit program to municipal and industrial stormwater discharges, focusing on how to ensure such discharges comply with Clean Water Act water quality standards. The paper explores questions around defining 'Waters of the State,' determining compliance monitoring points, and identifying which permitted dischargers require water-quality-based effluent limitations. Note that this paper does not represent official Ecology policy and was intended to stimulate internal discussion and policy decisions.

Draft amendments prepared by Tom Culhane and Jerry Liszak of Washington Department of Ecology Northwest Regional Office, Water Resources Program, replacing text of OFTR 95-01 for the Initial Watershed Assessment of Water Resources Inventory Area 9 (WRIA 9), Green-Duwamish Watershed. Document covers hydrogeology, ground water-surface water interaction, water demand, streamflow status, water rights and claims

This 1995 Washington State Department of Ecology document provides guidance for cleaning up soils contaminated by petroleum products. It outlines remediation standards and procedures under the state's Toxics Cleanup Program, applicable across all regions of Washington State. Note: This document addresses soil contamination cleanup and does not contain content specifically related to Sea-Tac Airport noise policy.