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Record Details

Use of beta ARM2 Technique as an Alternative Model
Record No: 15-II-01      Last Update: 12/22/2015

EPA Region: 2     Fiscal Year: 2015
States: NY
Record Type: Action
Pollutants: NO2     Sources: Generic to Any Stationary Source
Models: AERMOD     Urban/Rural: Rural
Terrain: Both High & Low     Regulations: PSD
Guideline: Guideline     Database: Both
Oral/Written: Written     Involvement: Review and Comment
Subjects: Technical Credibility of Nonguideline Techniques        
Comments: 
Issue:  Region II is seeking concurrence from the Model 
Clearinghouse for the approval of an alternative modeling 
demonstration for the use of the beta Ambient Ratio Method 2 
(ARM2) Tier 2 NO2 modeling technique.  The ARM2 technique 
will be applied in an compliance demonstration for a PSD 
permit modification at the Corning Diesel Manufacturing 
Facility in Steuben County, NY.

C/H Response:  The Model Clearinghouse concurs that ARM2 is 
an appropriate technique for modeling NO2 impacts from the 
Corning Diesel Manufacturing Facility in Steuben Count, NY. 
In this PSD permit modification, the ARM2 technique can be 
used to address changes in stack parameters along with 
changes in operating conditions that can otherwise be 
difficult or impossible to account for in a standard AERMOD 
model run.  This particular case requires substantial 
consideration when selecting the minimum ambient ratio to 
apply in ARM2.  Based on the information provided to date, 
the Model Clearinghouse believes that a minimum ambient 
NO2/NOx ratio of 0.54 will be appropriately conservative.
Memoranda: 

Memo:  Model Clearinghouse Review of the Use of the Beta ARM2 
Technique for the Corning Diesel Manufacturing Facility in 
Steuben County, New York
          Dated: July 16, 2015
          From:  George Bridgers, Model Clearinghouse Director
                   Air Quality Modeling Group, EPA
                 Chris Owen, Physical Scientist
                   Air Quality Modeling Group, EPA
            To:  Richard Ruvo, Chief
                   Air Programs Branch, Region 2, EPA
                 Annamaria Colecchia, Environmental Scientist
                   Permitting Section, Air Programs Branch, Region 2, EPA

Memo:  Request to Approve the Use of the Beta ARM2 Technique 
for the Corning Diesel Manufacturing Facility in Steuben 
County, New York
          Dated: June 18, 2015
          From:  Annamaria Colecchia, Environmental Scientist
                   Permitting Section, Air Programs Branch, Region 2, EPA
          Thru:  Richard Ruvo, Chief
                   Air Programs Branch, Region 2, EPA
            To:  George Bridgers, Model Clearinghouse Director
                   Air Quality Modeling Group, EPA

Attachment A:  Corning Diesel Mfg Final Modeling Report - May 2015

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