Posted by on Friday, October 5th, 2018 in Newsletters

What’s Happening Now

New AERMOD classes scheduled for October

We apologize for the late notice, but we’ve recently scheduled AERMOD Modeling for Permits and Advanced AERMOD classes to be held in Littleton, MA October 23‑26, 2018. Click here to register for either or both classes. Autumn in New England and dispersion modeling together – does it get any better than that?

Our New Website is Here!

For years, you’ve used to access our software updates and you’ve used to register for training classes. So, in the spirit of “one-stop shopping”, we’ve built a new website that combines these two needs into one state of the art site. The new URL is, and we encourage you to pay a visit and add it to your browser bookmarks.

EPA News

Not much going on on the EPA front. We’re still expecting to see soon:

  • Draft Guidance on Ozone and PM2.5 Permit Modeling to be released soon for public comment
  • The new draft version of AERSURFACE, to be called 18152_DRFT, will be posted to SCRAM in the near future, pending completion of documentation. EPA will then take comments for 60 days and then release a final version.
Conferences and Workshops

Air & Waste Management Association

AWMA Louisiana Section Meeting – The 2018 annual meeting of the Louisiana Section of AWMA will be held October 24‑25 at the L’Auberge Casino and Hotel in Baton Rouge. Click here for more information.

AWMA Lake Michigan States Section Air Quality Management Conference – The 2018 Air Quality Management Conference, sponsored by the AWMA Lake Michigan States Section, will be held October 30 at the Drury Lane Conference Center in Oakbrook Terrace, IL. Check here for more details.

**New Source Review Workshop Manual** – If you do New Source Review air permitting (and/or modeling), please note that AWMA’s New Source Review Manual is now available! This new version is available online in an interactive, hyperlinked and searchable format. It covers all the big NSR-related topics, such as PSD / nonattainment applicability, BACT, air quality analysis, and modeling. Check here for details.

PNWIS Annual Conference – The 58th annual conference of the Pacific Northwest International Section (PNWIS) of AWMA will be held November 7‑9, 2018 in Nanaimo, British Columbia, Canada. Look for details at https://www.pnwis.or/2018-annual-conference/.

New Source Review Workshop – AWMA’s latest in its series of NSR Workshops will be held December 11‑12, 2018 in Louisville, KY. This popular event, which is based on the above-mentioned NSR Workshop Manual, provides attendees with an in-depth knowledge of the NSR rules and how to apply them. Click here to find out more.

**HOT** AWMA Specialty Conference – “Guideline on Air Quality Models: Planning Ahead” – It was announced at the June meeting of the AWMA Air Pollution Modeling committee (held during ACE) that the next of AWMA’s series of dispersion modeling specialty conferences will be held in the spring of 2019. We now have a date and location! This specialty conference has been dubbed The Guideline on Air Quality Models: Planning Ahead and will be held March 19‑21, 2019 in Durham, NC. The call for abstracts was recently announced and these are due October 15. For more information go to We’ll be there and hope to see you there, too!

**HOT** AWMA ACE 2019 – The 112th AWMA Annual Conference and Exhibition (ACE) will be held in Quebec City, Quebec, Canada June 25‑28, 2019. This year’s theme is “Winds of Change – Environment, Energy, and Health.” Abstracts for platform presentations, posters, and panels are due November 30. Find the complete Call for Abstracts and directions on the ACE 2019 Author Resource Center. General conference information can be found at

Other Events

Texas Commission on Environmental Quality’s Autumn Environmental Quality Conference and Expo – The TCEQ’s new Autumn Environmental Conference and Expo combines the former Advanced Air Permitting and Water Quality/Stormwater Seminars and includes a one-day Waste Classification Workshop. This event will be October 9‑11, 2018 and will be held at the Palmer Events Center in Austin, Texas. We’ll be there (booth 313) and hope to see you there, too! For more information regarding agenda, registration, hotels, etc. check out

CAPCA Fall Meeting – The Carolinas Air Pollution Control Association’s (CAPCA’s) 2018 Fall Technical Workshop and Forum will be held October 24‑26, 2018 at the Hilton Myrtle Beach Resort in Myrtle Beach, SC. For information on registration and logistics, go here.

If your company, organization, agency, State, etc. has an upcoming modeling or air quality-related event and you’d like it publicized in Providence/Oris Notes, please send that information to us at, and we’ll be happy to include it.

Simply the Best!


BEEST 11.13 will be released this month. This new version includes:

  • Ability to Find “Other” objects within Show Current Data Graphically
  • Displays a message when a met station’s profile base elevation is not in the EPA database
  • Several bug fixes

Users in maintenance can download the most recent version of BEEST from Support → Software Updates.

“Go BEEST Mode!” — What? You still don’t have your own “Go BEEST Mode” t-shirt? Don’t worry, we’ve got plenty left – so email your request to and receive your very own “Go BEEST Mode” T-shirt! You’ll be the envy of modelers everywhere!

AerScreen for Windows

Since AerScreen for Windows uses both AERMOD and AERMAP, we released AerScreen for Windows 3.06 on May 31, 2018. This new version fully supports AERMOD 18081 and AERMAP 18081.

Users in maintenance can download the most recent version of AerScreen for Windows from Support → Software Updates.

Professional CalPuff

Our most recent version of Professional CalPuff (4.00) was released August 26, 2016 and is available to all registered users with current maintenance.

Users in maintenance can download the most recent version of Professional CalPuff from Support → Software Updates.


→ Third in a series on this new software product

So far, we’ve talked about what AERMOD Wizard can do for you in terms of obtaining, manipulating, and using both meteorological data and ambient air data. It can also *combine* the two types of data. Using the same approach that is found in our WindRose utility (currently found in BEEST, but now also in AERMOD Wizard), users can create pollution roses. Analogous to a wind rose, a pollution rose combines the wind directions from the met data as the radials and bins of pollutant concentrations from the ambient data as the “petals.” These can be useful when trying to infer the impact of a local source(s) upon a monitor. Not only that, but the pollution rose (as well as a wind rose) can be exported to Google Earth.

AERMOD Wizard also contains a forward trajectory tool that allows you to select a time period. AERMOD Wizard then reads the surface met data for the selected hours and calculates and plots a forward trajectory onto the graphical map interface.

Finally, if you’ve ever worked on a PSD permit and had to address Class I area impacts, you’re aware of the initial Q/D analysis. That is, EPA/FLM guidance states that if the ratio of summed visibility obscuring pollutants from a source (Q, in tpy) to the distance from the PSD source to a Class I area (in km), is less than 10, then full long-range transport modeling is not required. AERMOD Wizard allows you to set/locate your proposed source (along with its emissions) and then automatically calculate Q/D for all US Class I areas. It’s that simple and it’s that quick!

AERMOD Wizard will be released this month, so watch your inbox and our website ( for the announcement!

* We’re off to see the Wizard! *

If you have suggestions for an enhancement to any of our modeling software products, please let us know and we’ll do our best to incorporate it into the software ASAP!

“Our expertise is contagious. Catch it!”

AERMOD Modeling for Permits

As we mentioned above, we have just scheduled a new AERMOD Modeling for Permits class to be held in Littleton, MA on October 23‑24, 2018. Click here to register and plan to join us, along with the beautiful autumn New England foliage!

Our last scheduled AERMOD Modeling for Permits class for 2018 will be November 13‑14. It will be at our training facility at our Austin, Texas office. Register today and plan to join us in the Live Music Capital of the World! Click here to register!

Advanced AERMOD

Likewise, we’ve also got a new Advanced AERMOD class scheduled for October 25‑26, 2018 in Littleton, MA. Click here to register!

Similarly, our last scheduled Advanced AERMOD class of the year is going to be November 15‑16, also at our Austin office.

Advanced AERMOD covers those topics that are near and dear to modelers, such as:

  • NAAQS modeling for 1-hour NO2, 1-hour SO2 and 24-hour PM2.5 (including the new MaxDCont Viewer)
  • Meteorological data processing with AERMET / AERMINUTE / AERSURFACE
  • Changes related to the new Appendix W (Guideline on Air Quality Models)
  • MAXIFILE and ARRAY2 processing
  • AERMOD alpha options, such as PSDCREDIT
  • AERMOD Wizard and its uses

Click here to register!

2019 Class Schedule

Here’s our current list of scheduled AERMOD classes for 2019:

Class Dates Location
AERMOD Modeling for Permits February 26 – 27 Austin, TX
Advanced AERMOD February 28 – March 1 Austin, TX
AERMOD Modeling for Permits April 23 – 24 Austin, TX
Advanced AERMOD April 25 – 26 Austin, TX
AERMOD Modeling for Permits August 20 – 21 Austin, TX
Advanced AERMOD August 22 – 23 Austin, TX
AERMOD Modeling for Permits December 3 – 4 Austin, TX
Advanced AERMOD December 5 – 6 Austin, TX

**Don’t forget, if our schedule of classes doesn’t mesh with your schedule, or if you have several people that need to be trained at once, contact us about setting up an on-site class. Have laptop, will travel!**


**BeestXpress has been upgraded to run AERMOD 18081**

In addition, BeestXpress users have some great system enhancements to work with:

  • The “Job Details” webpage now displays the pollutant being modeled;
  • The “Job Details” webpage now displays run progress for MAXDCONT calculations;
  • Modeling runs with multiple partitions now include a combined AERMOD input file (*.DTA) in the output .ZIP file;
  • Added an option to the “Submit Job” webpage that affects modeling runs with multiple partitions: the intermediate output files created by each partition can be omitted from the output .ZIP file
  • The “Job Search” webpage now includes the option to search by project number
  • Users have access to up to 50 partitions per AERMOD run

To date, BeestXpress has processed over 300,000 AERMOD runs. Wow!

If you’ve never used BeestXpress, or it has been a while since you did, you may want to log on at to take advantage of our AERMOD “force multiplier”. That AERMOD run that might have taken a day to run on your desktop computer can finish in an hour or less on BeestXpress. When time is money, BeestXpress is the best modeling return on investment there is!

Meteorological Data Processing Services

Do you need AERMOD-ready or CalPuff-ready meteorological data? If so, we can help! Whether it’s running the AERMET / AERMINUTE system or a full CalMet run, Providence has the background, know-how, and experience to have your data processed and ready for you ASAP. Need on-site data processed? We do that, too! If you’d like more information, contact us at or

Consulting Solutions

One thing that we’re very proud of is the depth and range of our modeling experience and expertise. The kinds of air quality models we’ve used include all types, ranging from simple screening tools like SCREEN3 and AERSCREEN to plume models like ISC and AERMOD to CalPuff to CAMx. The types of analyses included basic Significant Impact Level, NAAQS, PSD increment consumption, Class I analyses, air toxics, and SIP attainment demonstrations. Most recently, we have begun conducting nonattainment permit inter-pollutant trading (NOx for VOC) modeling using CAMx. So, we’ve seen it all. To that end, should you or your clients need additional modeling assistance or just a second set of eyes to QA or peer review your modeling (ranging from initial protocol up to final submission), we stand ready to help. Feel free to contact us at (512) 258-8855 or


Calendar separator

October 9-11, 2018
TCEQ Autumn Environmental Quality Conference and Expo
Austin, TX

October 23-24, 2018
AERMOD Modeling for Permits
Littleton, MA

October 25-26, 2018
Advanced AERMOD
Littleton, MA

October 24-25, 2018
AWMA Louisiana Section Annual Meeting
Baton Rouge, LA

October 24-26, 2018
CAPCA Fall Conference
Myrtle Beach, SC

October 30, 2018
AWMA Lake Michigan States Air Quality Management Conference
Oakbrook Terrace, IL

November 7-9, 2018
AWMA Pacific Northwest International Section 58th Annual Conference
Nanaimo, British Columbia, Canada

November 13-14, 2018
AERMOD Modeling for Permits
Austin, TX

November 15-16, 2018
Advanced AERMOD
Austin, TX

December 11-12, 2018
AWMA New Source Review Workshop
Louisville, KY

February 26-27, 2019
AERMOD Modeling for Permits
Austin, TX

February 28-March 1, 2019
Advanced AERMOD
Austin, TX

March 19-21, 2019
AWMA Specialty Conference: Guideline on Air Quality Models: Planning Ahead
Durham, NC

June 25-28, 2019
112th AWMA Annual Conference and Exhibition
Quebec City, Quebec, Canada

Our complete class schedule can be found at