EPA PROPOSAL FOR FOUR CORNERS POWER PLANT

ANNOUNCEMENT OF PROPOSED BART DETERMINATION, OPEN H OUSE AND

PUBLIC HEARING, AND REQUEST FOR PUBLIC COMMENT

EPA-R09-OAR-2010-0683

The Region 9 Office of the United States Environmen tal Protection Agency (EPA) requests public comment on a Proposed Source Specific Federa l Implementation Plan for Implementing Best Available Retrofit Technology for Four Corners Power Plant, located on the Navajo Nation. The Clean Air Act’s Regional Haze Rule requires the use of Best Available Retrofit Technology (BART) at older coal-fired power plants to reduce h aze and improve visibility.

On October 19, 2010, EPA proposed requiring the Fou r Corners Power Plant to meet a plantwide limit of 0.11 lb/MMBtu, representing an 80% re duction in emissions of nitrogen oxides (NOx) to achieve cleaner, healthier air while impro ving the visibility at sixteen of our most pristine national parks and wilderness areas. EPA’s proposal can be achieved by installing and operating selective catalytic reduction (SCR) on al l five units. EPA is also proposing a particulate matter (PM) emission limit of 0.012 lb/ MMBtu for the three smaller units that will require additional controls for fine particles, and is also requesting comment on whether BART can be met on the three smaller units by requiring an emission limit of 0.03 lb/MMBtu with a 20% opacity limit. Reduction of fine particles may help reduce the visible secondary plume that is often emanating from these three units. For the two larger units at Four Corners Power Plant, EPA is proposing an emission limit of 0.015 lb/MMBt u, achievable with proper operation of the existing baghouses.

All information submitted by the facility is availa ble as part of the administrative record. The proposal, technical support document, and other sup porting information are available on the EPA Region 9 website at http://www.epa.gov/region9/air/ navajo/index.html#proposed. The administrative record may also be viewed in person, Monday through Friday from 9:00 AM to 4:00 PM, at the EPA Region 9 address below. Due to building security procedures, please contact Anita Lee at (415) 972-3958 or by email at r9air_fcppbart@epa.gov to arrange a visit at

least 24 hours in advance.

EPA is holding open houses – for the purpose of pro viding additional information and informal discussion of our proposal, and public hearings – t o accept oral comments into the record, as

follows:

Date: December 7, 2010 Time: Open House: 3:00 – 5:00 pm Public Hearing: 6:00 pm – 9:00 pm Location: Phil L. Thomas Performing Arts Center Highway 64 West Shiprock, New Mexico 87420

Date: December 8, 2010 Time: Open House: 3:00 – 5:00 pmPublic Hearing: 6:00 pm – 9:00 pm

Location: San Juan College

Henderson Fine Arts Bldg – Rooms 9006 & 9008 4601 College Blvd Farmington, New Mexico 87402

Date: December 9, 2010 Time: Open House: 3:00 – 5:00 pm Public Hearing: 6:00 pm – 9:00 pm

Location: Double Tree Hotel

Mesa Verde La Plata Room

501 Camino Del Rio Durango, Colorado 81303

Any person may provide written or oral comments, in English or Dine, and data pertaining to our proposal at the Public Hearing. English-Dine trans lation services will be provided at both the Open Houses and the Public Hearings in Shiprock and Farmington. We will not provide English-Dine Translation services in Durango unless we receive a request to do so by Friday November 18, 2010.

If you require a reasonable accommodation, by Friday, November 18, 2010 , please contact Terisa Williams, EPA Region 9 Reasonable Accommodat ions Coordinator, at (415) 972-3829, or Williams.Terisa@epa.gov

.

If you are unable to attend the public hearings, bu t wish to submit comments, you may submit comments by electronic mail or postal mail to the a ddress listed below. All comments on the proposal must be received by email or postmarked on or before December 20, 2010 . An extension of this comment period may be granted if a request for an extension adequately demonstrates that more time is required to give com menters a reasonable opportunity to prepare comments. Comments should address the proposal and facility, in particular:

1. The available technologies to control PM or NO

x ; 2. The cost of controls;

3. The energy, economic, and non-air quality impacts o f controls;

4. The existing controls at the facility;

5. The remaining useful life of the facility, and;

6. The degree of improvement in visibility which may r easonably anticipated to result from the use of such technology.

Any written comments must be received (if sent by e -mail) or postmarked (if sent by U.S. mail)

on or before December 20

, 2010 at the following addresses:

E-mail: r9air_fcppbart@epa.gov

U.S. Mail: Anita Lee (AIR-3) U.S. EPA Region 975 Hawthorne Street

San Francisco, CA 94105-3901

All comments that are received will be included in the public docket without change and will be available to the public, including any personal inf ormation provided, unless the comment includes Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Information that you conside r CBI or otherwise protected should be clearly

identified as such and should not be submitted thro ugh e-mail. If you send e-mail directly to the EPA, your e-mail address will be automatically capt ured and included as part of the public comment. Please note that an e-mail or postal addr ess must be provided with your comments if you wish to receive direct notification of EPA’s fi nal decision regarding the permit and responses to comments submitted during the public c omment period.

EPA will consider all written and oral comments sub mitted during the public comment period before taking final action and will send notice of the final decision to each person who submitted comments and contact information during the public comment period or requested notice of the final decision. EPA will respond to all substantive comments in a document accompanying the

final determination and will make the Public Hearin g proceedings available to the public.

If you have questions, please contact Anita Lee at (415) 972-3958 or email at r9air_fcppbart@epa.gov.

Please bring the foregoing notice to the attention of all persons who would be interested in this

matter.