FARMINGTON — The U.S. Environmental Protection Agency will host public information meetings and public hearings this week to discuss a permit application for the Four Corners Power Plant.

Arizona Public Service Co., the power plant's majority owner and operator, is seeking a permit to install additional selective catalytic reduction systems on its remaining operating stacks.

The first information meeting will be held at 6 p.m. Wednesday at the Nenahnezad Chapter house with the public hearing following at 7 p.m.

The second meeting will be at 6 p.m. and the hearing at 7 p.m. on Thursday at the San Juan College Henderson Fine Arts Center in rooms 9008 and 9010.

The third meeting will be at 11 a.m. and the hearing at noon on Thursday at the Phil L. Thomas Performing Arts Center in Shiprock.

Units 1, 2 and 3 of the coal-fired power plant, located southwest of Farmington on the Navajo Nation, were permanently shutdown on Jan. 1.

The permit requested would allow the completion of mandatory upgrades to units 4 and 5, satisfying EPA requirements intended to reduce regional haze.

According to the July fact sheet posted on the EPA's Region 9 website, installing the selective catalytic reduction systems would reduce the amount of nitrogen oxide emissions by approximately 80 percent.

In order for APS to comply with the EPA regulation, the systems must be installed on the two units by July 2018.

To meet the deadline, construction is scheduled for 2015, according to the fact sheet.

Arizona Public Service Co. submitted its application to the EPA in April.

According to the public notice, the meetings would provide the public with additional information and an opportunity for informal discussion about the proposed project.

Services providing translation from English to Navajo will be provided at each meeting and hearing.

All written comments must be received or postmarked by Sept. 24.

Comments may be submitted by email to R9airpermits@epa.gov or by mail to Lisa Beckham, U.S. EPA Region 9, 75 Hawthorne St., San Francisco, CA 94105-3901.

Noel Lyn Smith covers the Navajo Nation for The Daily Times. She can be reached at 505-564-4636. nsmith@daily-times.com Follow her @nsmithdt on Twitter.