July 15, 2013

Name

Address

Address

RE: Permanent rule updates to Ambient Air Quality Standards for NO2, SO2 and Pb, and adoption of 1-hour Significant Impact Levels for NO2 and SO2

Dear ACDP OR Title V permit holder,

This letter is to inform you about proposed rule amendments that may affect your activities. DEQ is developing a rulemaking proposal to update Oregon Administrative Rules as required by the Clean Air Act.

The proposed rule changes are necessary to align state rules with Section 110 requirements of the Clean Air Act by revising the rule language for the lead ambient air quality standards for consistency with the federal National Ambient Air Quality Standards (NAAQS), adopting the 1-hour ambient air quality standards for nitrogen dioxide and sulfur dioxide, and adopting 1-hour Significant Impact Levels for nitrogen dioxide and sulfur dioxide. If approved, these amendments will be submitted to the EPA for approval as revisions to the Oregon State Clean Air Act Implementation Plan.

What this means to you

If the above proposed rule amendments are approved by the Environmental Quality Commission (EQC), DEQ will be require a demonstration that significant increases of NO₂ and SO₂ emissions do not cause or contribute to a violation of the 1-hour standards when an air quality impact analysis is required by either the Plant Site Emission Limit or Prevention of Significant Deterioration (PSD) programs. If an analysis is required, the analysis must be conducted in accordance with a modeling protocol approved by DEQ and the results must be included in the application for a new or modified permit.

DEQ will propose the permanent rule amendments to the Environmental Quality Commission for adoption in October 2013. There will be an opportunity to comment during the public participation period of the permanent rulemaking. The rulemaking proposal can be viewed on DEQ’s rulemaking webpage at: http://www.deq.state.or.us/regulations/proposedrules.htm . Please contact Carrie Capp at 503-229-5868, toll free in Oregon at 800-452-4011, or email capp.carrie@deq.state.or.us for more information, of if you would like to request a hard copy of the rulemaking packet. You may contact Carrie by mail at the following address: Oregon DEQ Air Quality Division, 811 SW Sixth Avenue, Portland, OR 97204.

Sincerely,

CC: Air Quality Regional Managers

ccapp, 2013-07-03T15:39:00Z
This salutation will be tailores to the source (one or the other will be used according to permit type).

mfisher, 2013-07-03T15:39:00Z
Modeling is required under both the PSEL and PSD programs.

ACurtis, 2013-07-03T15:39:00Z
Make this current tense, not future tense. Add a “How to Comment” section and Public Hearing sections. For example:

How to comment:

You may submit comments in writing to Andrea Curtis by mail, fax, or e-mail, or you may attend the public hearing and submit written comments or provide testimony. It is not necessary to attend the hearing in order to comment. Written comments received prior to the deadline are treated equally with oral comments. To be considered, your comments must be received prior to the comment deadline of 5 p.m. on Oct. 19, 2010. Receipt of e-mail comments will be acknowledged immediately. If you have any

questions, please contact Andrea Curtis at 503-229-6866 or toll free in Oregon at 800-452-4011.

Written comments may be mailed to Andrea Curtis, Oregon DEQ, Air Quality Division, 811 SW Sixth

Avenue, Portland, OR 97204. Andrea Curtis may be contacted at 503-229-6866 or toll-free in Oregon at

1-800-452-4011.

Comments may be e-mailed to: tvfees@deq.state.or.us or faxed to Andrea Curtis at 503-229-5675.

Public hearing: October 18, 2010

DEQ - Headquarters

Conference Rm. EQC-A

811 SW 6th Ave. Portland, OR 97204

6 p.m.