REGIONAL HAZE IMPLICATIONS TO WESTERN POWER GENERATORS

• Jurisdiction: United States

Air Quality Challenges Facing the Natural Resources Industry in the Western United States
(Nov 2007)
CHAPTER 8A
REGIONAL HAZE IMPLICATIONS TO WESTERN POWER GENERATORS
Kevin Wanttaja
Manager, Environmental Services
Salt River Project
Phoenix, Arizona

SRP Power Plants Subject to Regional Haze Regulations

█ Arizona -- Coronado Generation Station

█ Petrified Forest, Mount Baldy

█ State Jurisdiction

█ Arizona/Navajo Lands -- Navajo Generating Station

█ Grand Canyon, Bryce, Zion, Canyonlands, Mesa Verde -- 11 National Park and Wilderness Areas

█ EPA Region 9 Jurisdiction

█ Participant Plants

█ Hayden/Craig -- Colorado

█ Four Corners -- New Mexico/Navajo Lands

█ Mohave -- Nevada

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SRP Navajo Generating Station

Protecting Visibility Is Important

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Regional Haze Background

█ Regulation to address visibility impairment due to man-made regional haze in 154 federal Class 1 areas

█ Haze causing pollutants emitted directly as fine particles or as formed as secondary particles from gaseous emissions

█ Long-range transport requires regional approach to control

█ Requires all states to revise SIPs to establish:

█ Reasonable further progress (RFP) goals to improve visibility and ensure not degradation on clearest days. Glide path of annual improvement leading to "natural visibility" by 2064

█ Long term strategies including enforceable measures to meet RFP goals

█ Emission limits for older stationary sources based on "Best Available Retrofit Technology"

Regional Haze Strategy

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Regional Haze Trading Program Requirements

█ October 2006 -- EPA finalized requirements for a regional haze emissions trading program to ensure consistency with D.C. Circuit Court decisions

█ 40 CFR 51.308 and 40 CFR 51.309 (Western Regional Air Partnership)

█ General Requirements:

█ Determine BART for each BART eligible source

█ Model visibility improvement at Class I areas (baseline)

█ Model visibility improvements from trading program

█ Trading program visibility improvements must be greater than BART

█ Average improvement at all Class 1 areas

█ No degradation at any Class 1 area

BART Facts

█ Affected facilities are those that:

█ Have 250 tons per year of SO_x, NO_x, or PM emissions;

█ Are a listed source category; and

█ Are shown to cause or contribute to visibility impairment in a Class I area.

█ Definitions that are subject to change by the state:

█ "Cause" visibility impairment = impacts 〉 1...