Item No. 7c_supp 
Meeting Date: February 26, 2019 
Scoping Report Briefing: 
SAMP Near-Term Projects
Environmental Review 
February 26, 2019 

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Scoping for SAMP Near-Term Projects 
Scoping is an early and open process for determining the scope
of issues that will be addressed in the environmental review
document, soliciting input regarding the SAMP Near-Term
Projects, and for identifying concerns regarding the potential
environmental effects of those projects 
The Scoping report is not intended to provide responses to each
individual comment. It is intended to identify topics and
themes that could inform the environmental review 
Scoping is a requirement of a SEPA EIS 
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Scoping and Report Overview 
Duration: 60 days (7/309/28/18; SEPA requirement is 21
days) 
Outcome: Scoping report (released 2/12/19) 
All comments categorized and grouped 
Scoping report 
Overview of process 
Participation 
Comments 
Available on Port and project website 
FAA (NEPA) and the Port of Seattle (SEPA) reviewed major topics and common themes together 
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Scoping Participation 
Public agency meeting:         7 agencies attended 
Public open houses:            300+ attendees 
Online open house*:           ~3,500 site visits 
Agency commentors:           ~10 
Individual commentors:        ~750 
Outreach 
Post cards* (14,000) - Local Online Media        - Social Media 
Airmail (95,000) - Local Newspaper          - Community Events 
Media Advisories - Emails                   *Five languages 
Extensive participation in robust scoping process 
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Environmental Review Timing 
NEPA EA Final Document & Decision 
SEPA EIS Draft Document
(Early Spring 2020) 
SEPA EIS Final 
Scoping                                                  NEPA EA Draft Document      Document & Decision 
(Late Fall 2019)                (Summer 2020) 

Environmental Analysis 
NEPA EA Agency 
& Public Review
(Early 2020)   SEPA EIS Agency 
& Public Review
(Spring 2020) 
Port's draft SEPA document will follow the FAA's NEPA decision 
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NEPA Resource Categories 
Air Quality                                          Historical, Architectural, Archeological, and
Biological Resources                                 Cultural Resources 
Climate                                         Natural Resources and Energy Supply 
Coastal Resources                                 Noise and Noise-Compatible Land Use 
Department of Transportation (DOT) Section 4(f)     Socioeconomics, Environmental Justice, and
Farmlands                                     Children's Environmental Health and Safety
Risks 
Hazardous Materials, Solid Waste, and Pollution
Prevention                                           Visual Effects 
Land Use                                       Water Resources 
Wetlands, floodplains, surface waters, groundwater, wild
and scenic rivers 

FAA is lead agency for NEPA and the document will cover an extensive set of resource categories 
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SEPA Elements of the Environment 
Earth                                           Environmental health 
Geology soils, topography, Unique physical features,                  Noise, risk of explosion, releases or potential releases to the
Erosion/enlargement of land area                                          environment affecting public health, such as toxic or
Air                                                     hazardous materials 
Air quality, odor, climate                                  Land and shoreline use 
Water                                             Relationship to existing land use plans and to estimated
population, housing, light and glare, aesthetics, recreation,
Surface water movement/quantity/quality,                          historic and cultural preservation, agricultural crops 
runoff/absorption, floods, groundwater
movement/quantity/quality, public water supplies                 Transportation 
Plants and animals                                      Transportation systems, vehicular traffic, waterborne, rail,
and air traffic, parking, movement/circulation of people or
Habitat for and numbers or diversity of species of plants,                goods, traffic hazards 
fish, or other wildlife, unique species, fish or wildlife
migration routes                                                   Public services and utilities 
Energy and natural resources                             Fire, police, schools, parks or other recreational facilities,
maintenance, communications, water/stormwater 
Amount required/rate of use/efficiency, source/availability,
nonrenewable resources, conservation and renewable             Sewer/solid waste 
resources, scenic resources 
Port is the lead agency for the SEPA and the document will cover an extensive set of environmental elements
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Common Theme:
Aviation Demand Forecast 
Representative Comments 
Recent demand has outpaced approved SAMP forecast 
Assess impacts that exceed SAMP forecasts, in case forecast is low 
Next Steps 
The Port and the FAA will review the approved SAMP forecast and determine if it needs to be
supplemented or updated to better reflect current and anticipated future conditions 


Demand at Sea-Tac Airport has mirrored the economic growth of the region 
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Common Theme:
Alternatives in the Environmental Review 
Representative Comments 
Use other existing airports or a new regional airport 
Include a scaled-back or "constrained" plan 
Include SAMP Long-Term Vision (LTV) 
Next Steps 
Port and FAA will consider SAMP planning and Scoping comments regarding alternatives 
Alternatives that are "reasonable" and meet "purpose and need" will be analyzed 
Environmental review may identify mitigation that would constitute an alternative 
LTV will be discussed within the cumulative impacts analysis 
SAMP Near-Term Projects environmental review will include an alternatives analysis 
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Common Theme: 
Human Health Impacts 
Representative Comments 
Conduct human health study 
Next Steps 
Port will hire an expert to understand how human health impacts could be incorporated into
SEPA 


Human health will be a component of the SAMP Near-Term Projects environmental review 
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Common Theme: Aircraft Noise 
Representative Comments 
Use lower threshold than 65 DNL 
Use noise metrics other than the FAA's required Day-Night Level (DNL) 
Include impacts of NextGen technology and other changes to the airspace 
Request for additional noise measurements and monitoring 
Next Steps 
Analysis will use FAA-established significance thresholds, methodologies, and metrics 
Monitoring will be used to validate inputs to the noise modeling for the environmental
analysis 
SAMP Near-Term Projects environmental review will include an analysis of noise impacts 
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Common Theme:
Air Quality and Climate 
Representative Comments 
Quantify and mitigate Greenhouse Gas (GHG) emissions 
Request for air quality monitoring 
Conduct analysis of ultrafine particulates (UFP) 
Next Steps 
Analysis will include quantitative GHG analysis 
Analysis of air pollutant emissions will follow established standards, i.e. Clean Air Act 
Port will hire an expert to understand how UFPs could be incorporated into SEPA analysis 
SAMP Near-Term Projects environmental review will include an air quality, climate, and GHG assessment 
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Common Themes:
Environmental Review Process 
Representative Comments 
Assess impacts of recent (past) growth, using 2012 as base year 
Delay NEPA and SEPA review until other studies have been completed (ex. UFP & PSRC) 
Include an analysis on individuals' quality of life 
Next Steps 
Document will identify existing conditions and past growth as part of cumulative impacts 
Document will identify where information is not available or where uncertainty exists (SEPA) 
Quality of life will be considered as it pertains to elements within SEPA 
Other Port efforts are addressing non-SAMP comments received 
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Next Steps 
Release Scoping Report (released 2/12/19) 
Refine NEPA EA and SEPA EIS scope to reflect comments
received 
Conduct environmental analysis (through Fall 2019) 
Publish draft NEPA EA document for public review and
comment (Late Fall 2019) 
Draft SEPA EIS document will follow the FAA's NEPA
decision 
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