lead agency and project proponent, the Port will consider greenhouse gas emissions and the
effect of changes in climate on proposed actions as a mandatory component of our environmental
review.
SEPA provides a framework for considering environmental impacts of proposed actions. With
respect to climate change, the SEPA analysis of the environmental impacts of a proposal may
include the following steps, which are part of the standard SEPA review process:
1. Reasonable identification, calculation, or other evaluation of greenhouse gas
emissions associated with the project,
2. Identification of reasonable mitigation that avoids, reduces, or compensates for
the adverse effects of the emissions,
3. Assessment of the potential effects or impacts that climate change may have on
the project itself,
4. Assessment of the “significance” of the unmitigated emissions associated with the
project,
5. Assessment of the “significance” of climate changes on the project,
6. If required, the preparation of an Environmental Impact Statement (EIS) that: (a)
analyzes the environmental impacts of a project’s greenhouse gas emissions and
the effect of climate change on a project, (b) identifies alternatives, and (c)
possible mitigation options.
PART THREE
IDENTIFICATION AND CALCULATION OF GREENHOUSE GAS EMISSIONS
Section 4 Calculation of GHG Emissions
The Port project proponent will identify and calculate both direct and indirect greenhouse gas
emissions within reasonable spatial and temporal boundaries of a proposal as part of SEPA
environmental review. Project proponents should evaluate their proposal for all known or
expected sources of greenhouse gases that they can reasonably assess or calculate over the life of
the project. The rigor of the greenhouse gas calculation or assessment will depend on the scope,
scale and context of a particular proposal. The proponent should distinguish between those
emissions that are under the direct control of the project proponent from those that are owned
and/or controlled by third parties. For many projects, a reasonable qualitative estimate of
emissions may be sufficient. For others, particularly those projects that may be covered by the
State of Washington’s mandatory greenhouse gas reporting requirement or any other reporting
requirement adopted by the United States Environmental Protection Agency, more rigorous
quantification methods might be appropriate.
Section 5 Emissions Quantification Methodologies
Project proponents should use well-accepted emission quantification methodologies appropriate
and reasonable for the scope and scale of a project when calculating or otherwise assessing
emissions from a project. Appendix A to this resolution identifies well-accepted quantification
methodologies currently used for many of the most common emission sources and may be
utilized by project proponents to assist in calculating and evaluating emissions. The Port may