Dispersion Modeling

The North Dakota Department of Health, Division of Air Quality has developed the following guidance and policy documents to assist permit applicants in the process of drafting complete permit applications.

For more information on Dispersion Modeling in North Dakota, please direct questions or comments to the North Dakota Department of Health at 701.328.5188, or email Rob White (rwhite@nd.gov).


Dispersion Modeling

Dispersion modeling for criteria pollutants and air toxics may be required prior to issuance of a Permit to Construct in accordance with the Criteria Pollutant Modeling Requirements for a Permit to Construct and Air Toxics Policy.  For facilities with compressor engines and glycol dehydration units, dispersion modeling may be required in accordance with the Dispersion Modeling Requirements for Compressor Engines and Glycol Dehydration Units.


Air Quality Analysis Guide

The Department strongly encourages the development of a pre-application dispersion modeling protocol in consultation with the Department in order to expedite the project review process. To aid the applicant in this process, the following Air Quality Analysis Guide has been provided.


Related Links

More information about air dispersion modeling can be found on EPA's Support Center for Regulatory Atmospheric Modeling (SCRAM) site or through their Technology Transfer Network Clearinghouse for Inventories & Emission Factors site.

Air Monitoring

Construction Permitting

Regional Haze Program


Title

Rev. Date

Topic

AERMET Surface & Upper-Air Meteorology Station 2004 to 2008 Modeling
Air Dispersion Modeling for Emergency Engines / Flares 06 October 2014 Modeling
Compressor Engines & Glycol Dehydration Units 23 January 2015 Modeling
Criteria Pollutant Modeling Requirements for a Permit to Construct 06 October 2014 Modeling
Hourly Ozone Sites 2004 to 2008 Modeling
Model Input Parameters for Flares 10 November 2010 Modeling
Policy for the Control of Hazardous Air Pollutant (HAP) Emissions in ND (Air Toxics Policy) 25 August 2010 Modeling
Recommended AERSURFACE Inputs (North Dakota) 16 September 2010 Modeling
User's Instructions for HRLYNAAQS 24 September 2010 Modeling
Air Quality Dispersion Modeling Analysis Guide 21 June 2013 Modeling

Surface Air MET (2009-2014)

Station

Station ID

Lat.

Long.

Elev. (m)

Upper-Air Site

TADJUST

File Type

CYEN–Estevan, Canada 94057 49.217 N 102.967 W 581.0 Glasgow, MT 6 DAT (Dropbox )
KABR–Aberdeen, SD 14929 45.45 N 98.421 W 396.2 Aberdeen, SD 6 DAT (Dropbox )
KBHK–Baker, MT 94055 46.333 N 104.25 W 902.0 Glasgow, MT 7 DAT (Dropbox )
KBIS–Bismarck, ND 24011 46.774 N 100.748 W 506.0 Bismarck, ND 6 DAT (Dropbox )
KDIK–Dickinson, ND 24012 46.797 N 102.802 W 787.3 Bismarck, ND 7 DAT (Dropbox )
KDVL–Devils Lake, ND 24015 48.117 N 98.917 W 443.0 Bismarck, ND 6 DAT (Dropbox )
KETH–Wheaton, MN 24017 45.78 N 96.534 W 313.0 Aberdeen, SD 6 DAT (Dropbox )
KFAR–Fargo, ND 14914 46.925 N 96.811 W 274.0 Aberdeen, SD 6 DAT (Dropbox )
KGFK–Grand Forks, ND 14916 47.949 N 97.176 W 253.6 International Falls, MN 6 DAT (Dropbox )
KHCO–Hallock, MN 24018 48.783 N 96.95 W 250.0 International Falls, MN 6 DAT (Dropbox )
KHEI–Hettinger, ND 94038 46.017 N 102.65 W 824.0 Bismarck, ND 7 DAT (Dropbox )
KISN–Williston, ND 94014 48.195 N 103.642 W 580.6 Glasgow, MT 6 DAT (Dropbox )
KJMS–Jamestown, ND 14919 46.93 N 98.678 W 455.4 Bismarck, ND 6 DAT (Dropbox )
KMBG–Mobridge, SD 94052 45.533 N 100.433 W 508.0 Bismarck, ND 6 DAT (Dropbox )
KMOT–Minot, ND 24013 48.259 N 101.281 W 522.4 Bismarck, ND 6 DAT (Dropbox )
KSDY–Sidney, MT 24021 47.707 N 104.184 W 605.0 Glasgow, MT 7 DAT (Dropbox )
Notes:
  • Anemometer height for all stations is 10.0 meters.
  • Surface data is in the CD144 format.
  • Upper-air station data is in FSL format.
  • Station ID has been changed to WBAN code from abbreviated WMO code (ID is also changed in CD144 met files, 1/18/12), for compatibility with AERMET Version 11059 and newer.

Upper-Air MET (2009-2014)

Station

Station ID

Lat.

Long.

KABR0913–Aberdeen, SD 14929 45.45 N 98.421 W
KBIS0913–Bismarck, ND 24011 46.774 N 100.748 W
KGGW0913–Glasgow, MT 94008 48.214 N 106.621 W
KINL0913–International Falls, MN 14918 48.57 N 93.38 W
Notes:
  • Upper-air station data is in FSL format.
  • Station ID has been changed to WBAN code from abbreviated WMO code (ID is also changed in CD144 met files, 1/18/12), for compatibility with AERMET Version 11059 and newer.

NDDoH Additional Modeling Software

Title

File Type

HRLYNAAQS Executable EXE (DOS)
HRLYNAAQS Input Example INP (AERMOD Input File)
HRLYNAAQS Users's Guide PDF
NO2HRSTDBG & SO2HRSTDBG Users's Guide PDF
NO2HRSTDBG Executable EXE (DOS)
NO2HRSTDBG10K Executable EXE (DOS)
SO2HRSTDBG Executable EXE (DOS)
SO2HRSTDBG10K Executable EXE (DOS)
VISCREEN Level 2 ZIP

NO2, SO2 & O3 Background

Title

File Type

NO2_0408S2_DC DAT
NO2_0408S2_LW DAT
SO2_0408S2_DC DAT
SO2_0408S2_LW DAT
Fargo SO2 DAT
Beulah O3 2009–2013 CST DAT
Beulah O3 2009–2013 MST DAT
Fargo O3 2009–2013 CST DAT
Hanover O3 2009–2013 CST DAT
Hanover O3 2009–2013 MST DAT
Lostwood NWR O3 2009–2013 CST DAT
Lostwood NWR O3 2009–2013 MST DAT
Theodor Roosevelt NP (North Unit) O3 2009–2013 MST DAT
Theodor Roosevelt NP (North Unit) O3 2009–2013 CST DAT
Ozone (O3) Sites 2009–2013 PDF
Notes 1/07/2011:

Files of hourly NO2 and SO2 concentrations from NDDoH monitoring sites listed above may be used as hourly background concentrations directly input to AERMOD or may be used to calculate other types of background values, e.g., annual, seasonal, or monthly averages. Monitoring sites with data in these folders represent the NDDoH's preferred sites for providing background concentration data, even though data from other monitoring sites may be used.

Files with designation "0408S2" have substitutions entered for all missing hours. Therefore, use of these hourly background files are preferred for use with NDDoH post-processing software.

Notes 8/14/2015:

Somewhat because of recent EPA guidance on background concentrations used with the new 1-hour NAAQS, the NDDoH does not recommend using hourly concentration data as a first choice for use in regulatory AERMOD modeling in North Dakota. For this reason, the background NO2 and SO2 concentration data listed above have not been updated with 2009-2013 monitoring data.

The NDDoH currently prefers use of a constant background concentration or input of matrices of seasonal, monthly, diurnal, or similar concentrations for use with AERMOD as a 1st and 2nd Tier background. Use of hourly monitoring data as background concentrations input to AERMOD will be considered on a case-by-case basis. Please contact the NDDoH Modeling Program for further information about options for background data.

Terrain

Title

File Type

TIF Terrain TIF.GZ

CALPUFF Inputs

Package

CALMET 2000 (ZIP )
CALMET 2001 (ZIP )
CALMET 2002 (ZIP )
Files included in ZIP package:
  • ABRUAF*.FIL
  • BISUAF*.FIL
  • CMET58*.INP (AERMOD Input File)
  • CMET58*.LST
  • GEO3KM.DAT
  • GGWUAF*.FIL
  • INLUAF*.FIL
  • PRCP0102.DAT
  • RAPUAF*.FIL
  • SURF.DAT
Note: * is for the year, i.e. 20– 00, 01, 02


Last Updated: 10/03/2016

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