TagEcology(797)

This March 2000 report, prepared by Washington State health and environmental agencies, examines whether jet engine exhaust emissions from Seattle-Tacoma International Airport can be monitored or modeled using wind and takeoff data. It reviews previous air quality studies, outlines health and environmental justice concerns for nearby communities, and recommends a structured air quality monitoring study with specific methods, data analysis approaches, and estimated costs. The report was developed in consultation with community representatives, the EPA, and local universities.

A February 2000 draft memorandum from Parametrix, Inc. outlines a scope and budget for range-finding Water-Effect Ratio (WER) studies using receiving water from Miller and Des Moines Creeks, conducted in connection with stormwater discharge permitting near the Port. The studies involve acute toxicity tests with copper-spiked water to determine whether site-specific water quality standards could be higher than generic state standards, potentially eliminating the need for a mixing zone. Estimated costs range from $2,110 for one creek site to $2,650 for two sites.

Email from Erik Stockdale (Ecology NWRO) to Raymond Hellwig and Tom Luster, dated February 17, 2000, summarizing a February 15 meeting with Jim Kelley of Parametrix regarding public comments on the Sea-Tac Airport third runway project (AR 018438–018440, Exhibit 173). Issues raised by commenters Sarah Cooke and Andy Castelle concerned incorrect wetland mitigation ratio calculations

A February 2000 draft memorandum from environmental consultants to Keith Smith summarizes efforts to develop a site-specific water quality criterion for copper in Miller, Walker, and Des Moines Creeks near Seattle-Tacoma Airport, in anticipation of stormwater runoff from a proposed third runway. The memo outlines two technical approaches—the Water-Effect Ratio (WER) and the site-specific metals translator—for potentially raising copper discharge permit limits, and describes toxicity screening and range-finding studies conducted in 1999. The phased study approach was designed to avoid unnecessary costs if the WER method proved infeasible or if the Washington Department of Ecology would not permit its use in adjusting permit limits.

State of Washington interagency policy guidance (AR 034771, Exhibit 2193) adopted by Washington Department of Fish and Wildlife (WDFW) and Washington Department of Ecology (WDOE) for evaluating aquatic mitigation alternatives under section 401 of the Clean Water Act, the Shoreline Management Act (RCW 90.58), and the Hydraulic Code (RCW 75.20). Covers mitigation sequencing (avoiding, minimizing,

Email chain dated February 8, 2000 among Washington State Department of Ecology staff (Roger Nye, Raymond Hellwig, Steve Alexander) regarding fill criteria compliance for the Third Runway at Sea-Tac Airport. Roger Nye describes the 401/404 permit fill acceptance policy developed with Port Of Seattle governing contaminant criteria for borrow sources used in Third Runway construction

Letter dated February 1, 2000 from John Strunk, Associated Earth Sciences, Inc. (AESI Project No. BV97016D) to Roger Nye, Washington Department of Ecology Northwest Regional Office, submitting first and second quarter ground water level measurements from the C1 (Qva) aquifer monitoring well network at Seattle-Tacoma International Airport. Reports on six pressure transducers installed in the

Memorandum BV97016D dated January 31, 2000, from John Strunk (Associated Earth Sciences Inc.) and Mike Riley (S.S. Papadopulos & Associates, Inc.) to Roger Nye, Department of Ecology, responding to nine Ecology comments on the Conceptual Flow Model Boundary Presentation for the Seattle-Tacoma International Airport ground water study. Topics addressed include MODFLOW model setup covering approximately

This is a procedural desk manual for Washington State Department of Ecology's Federal Permit Team, outlining how staff should review and process Section 401 Water Quality Certifications and Coastal Zone Management (CZM) consistency determinations for federally permitted projects. It covers application procedures, public notice requirements, review timelines, and technical guidance for evaluating impacts to water quality, wetlands, and sediments. This document does not contain content related to Sea-Tac Airport noise policy.

Desk Manual for Washington State Department of Ecology’s Federal Permit Team covering Section 401 Water Quality Certifications and Coastal Zone Management Act (CZM) consistency determinations. Covers SEPA compliance, JARPA application procedures, public notice and hearings, permit review timelines, waivers, 303(d)-listed waters, wetlands mitigation, sediment management standards, Puget Sound Dredged Disposal Analysis (PSDDA), NPDES coordination, antidegradation,