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DNR News Releases

Archive by tag: Modeling GuidanceReturn

Updated Air Dispersion Modeling Guidance and Form MD Available

• 8/25/2021 4:01:00 PM
• View Count 1682

For those projects that may require modeling, DNR updated three guidance documents and Form MD. The updates remove references to the 24-hour and annual SO2 National Ambient Air Quality Standards (NAAQS), which have been revoked.

Revised Modeling Guidance Available for Use

• 6/8/2017 1:53:00 PM
• View Count 3365

The DNR has updated various modeling guidance documents to incorporate the latest changes to federal modeling requirements.  The updates were reviewed with stakeholders at the May 25, 2017, AQ Client Contact meeting.  The guidance updates were also posted for a two week informal comment period that ended on June 7.  No comments were received so the documents were finalized as drafted.

Dispersion Modeling Data and Guidance Updates Available for Use

• 12/4/2015 9:28:00 AM
• View Count 4177

The DNR has updated the pre-processed meteorological data for AERMOD, the default background concentrations, and various guidance documents. Projects with approved protocols that include approval to use the old data, and modeling analyses submitted prior to December 4, 2015, will not have to use the new data. Applicants submitting new projects on or after December 4 should begin using the updated data and guidance immediately. The updates are summarized below.