July 1, 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 permanent rule amendments that may affect your activities under DEQ air quality permit. 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 to revise rule language for lead ambient air quality standards for consistency with the National Ambient Air Quality Standards, adopt 1-hour ambient air quality standards for nitrogen dioxide and sulfur dioxide equivalent to the primary 1-hour NAAQS, and adopt 1-hour Significant Impact Levels for nitrogen dioxide and sulfur dioxide equivalent to the federal standards for these pollutants. 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, DEQ will be required to include the 1-hour NO₂ and SO₂ ambient air quality standards in the modeling protocol for Prevention of Significant Deterioration air quality permit actions. At that time, newly constructed or expanding permitted industrial sources with NO₂ or SO₂ emissions above the Significant Emission Rate will be required to conduct modeling analysis for a Prevention of Significant Deterioration (PSD) determination.

DEQ will present the proposed permanent rule amendments to the Environmental Quality Commission 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, 2013-07-02T16:51:00Z
This salutation will be tailores to the source (one or the other will be used according to permit type).