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Forms and deliverables – AERA

To decrease the time it takes to complete and review an AERA, the MPCA has developed forms. These forms are intended to minimize the amount of effort required to document each step of the risk analysis. Forms are also intended to standardize the location and reporting of common information.  As of July 1st 2011, in order to be considered complete, air permit applications supported by AERAs will need to include completed AERA forms 01, 02, 03, 05, and 24 in addition to Permit Forms GI-01, GI-02, GI-03, GI-04, and MI-01. Additional forms such as AERA forms 04, 13, 19, 26, 27, Hg-01, and GI-05D may be required depending on the project. If your AERA project uses a refined analysis based on EPA's Human Health Risk Assessment Protocol (e.g. IRAP) or the MPCA Mercury Risk Estimation Method (MMREM) you will need to obtain approval on the preliminary AERA package including the protocol form (AERA-26 or AERA-27) prior to submitting your permit application and the final AERA results. It is highly recommend that proposers and consultants working on projects that might need an AERA contact the MPCA to discuss their project in a pre-application meeting and submit initial AERA materials for MPCA review prior to submitting an air permit application. This way site specific suggestions from the MPCA can be incorporated into the final AERA. To schedule a pre-application meeting, please contact Steven Pak at 651-757-2633. For questions with the AERA forms and process, please contact Shelley Burman at 651-757-2255.

Forms

Electronic submittals should be sent to: AirModeling.PCA@state.mn.us  and paper copies should be mailed to MPCA, Air Quality Permit Document Coordinator, IND/AQPD, 520 Lafayette Road, St. Paul, MN 55155-4194.

AERA forms

Permit forms

Mercury guidance and form

Deliverables

Dispersion submittals

  • DISPERSE summary report and summary figures
  • Model input/output if other dispersion modeling used for dispersion factor (e.g. SCREEN3, ISCST3, ISC-PRIME, AERMOD, BPIP, BPIP-PRIME)

Risk Assessment Screening Spreadsheet (RASS) and Q/CHI Submittal Characterization

RASS

The nature and number of RASS submittals will vary depending on the facility information described below.  There are both new and expanding types of projects that are considered in AERAs.  Expanding facilities are now asked to submit two RASS to characterize emissions before and after the proposed project.

The number of additional RASS submittals depends on the scenarios used below:

Two separate RASS would be required when chronic (annual) exposure receptors exist “at or beyond” the fenceline, and acute (maximum 1 hour exposures) exposures could occur on the property.

A RASS with all chemicals and a separate RASS with the risk drivers would be submitted if chemicals are screened from the analysis. A RASS with risk drivers only would screen out carcinogens with less than 10-6 additional cancer risk and non carcinogens with less than 0.1 hazard quotients.

Q/CHI spreadsheet

If the more conservative RASS shows non-cancer hazard indices or cancer risks above thresholds, a Q/CHI analysis may be conducted.  A Q/CHI spreadsheet may be submitted iteratively with the RASS or by itself.  If chemicals and exposure scenarios are eliminated from evaluation because of RASS results, those RASS must be submitted. 

For more information on the Q/CHI spreadsheet see the Risk Assessment Screening Spreadsheet (RASS) and Q/CHI webpage.

Last modified on May 28, 2013 14:39
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