Potential to Emit

Forms: GI-07-R/GI-07

Note: If you are submitting an administrative amendment, you only need to provide information about individual units, tanks, fugitive sources, etc. affected by the amendment.

This page allows you to edit and add potential to emit information for individual emission sources at your facility. You may not continue until all mandatory fields are entered for each emission source. Include all criteria pollutants, greenhouse gases (GHGs) and hazardous air pollutants (HAPs) for each emission source.

Each source must have data for each pollutant unless there is a group limit (e.g., total throughput limit, VOC cap, etc.). For example, if there is an annual group limit, the Potential Limited (tons/yr) emissions data may be entered at the group subject item (COMG), but the Potential Lbs/Hr and the Unrestricted Potential (tons/yr) columns must be entered for each source in the group. Regardless, Unrestricted Potential (tons/yr) must be included for all individual emission sources.

If the source emits particulate matter, include emissions of total particulate matter (PM), particulate matter smaller than 10 microns (PM10), and particulate matter smaller than 2.5 microns (PM2.5). Include hazardous air pollutant emissions for all permitted combustion sources. Include greenhouse gas (GHG) emissions, listed as individual GHGs and as carbon dioxide equivalents (CO2e).

Before completing this step in the application process, you must compile the necessary emission calculations for existing equipment and complete emissions calculations for any equipment newly listed. For existing equipment, make sure to account for any changes that have occurred since your permit was issued (e.g., changes to fuels, raw material contents, new test data, etc.). If you do not have these calculations from previously-submitted applications, you must complete the emissions calculations now. After you have completed the calculations, transfer the appropriate information to the page.

Note: TANKS Emissions Estimation Software, Version 4.09d is no longer supported by U.S. Environmental Protection Agency (EPA). EPA stated that they have observed reliability issues, and anticipate further problems with the software, on more current Windows operating systems. Since the MPCA cannot verify emissions data from Tanks 4.09d, the MPCA will no longer accept emissions data using the software in permit applications. All existing, permitted tanks which were previously approved using the TANKS software will not be affected. Moving forward if the Permittee is installing a new tank, changing a tank’s substance, or increasing a tank’s throughput, they should use the equations/algorithms from AP-42 Chapter 7 to calculate emissions from the units. These equations/algorithms can be employed with many current spreadsheet/software programs.

You are required to attach the unlocked, editable calculation spreadsheet with your application.

Your spreadsheet needs to include a tab compiling the emissions for each source and the emission totals at the facility. The GI-07 Facility emissions summary spreadsheet can be copied into a tab in your spreadsheet and used for this purpose. The emissions summary tab needs to link the pollutant emissions data from the emission calculation tabs. The pollutant totals for your facility need to be summed from the emissions for the separate sources. Do not hard enter emissions data into the emissions summary tab.

For specific instructions to calculate potential to emit (PTE), visit the Emission Calculations webpage.

Click Add Row to add new pollutant information for an individual emission source. You may edit some information in existing rows. These are rows that have been populated by data you have entered previously.

Emission Source — Select a piece of equipment from the drop-down list to add PTE data. If the equipment you wish to select is not present, first save any progress you have made. Then, navigate to the appropriate page (most likely the emission units page) via the navigation panel on the left and make sure that the equipment is added there.

Note: If a subject item has no pollutants, do not select that source; instead select the blank option from the Emission Source drop-down list. For example, if you enter a pollutant/emissions at the unit level that has no emissions and then pick the stack/vent for that unit, the system won't let you continue without entering a pollutant at the stack/vent. As a workaround, change the selected source to the blank option.

Click Next Emission Source to go to the next emission source. This action will take you away from the current page if all mandatory fields are entered. You will not be able to move to the next subject item if you are currently viewing the last item.

Click Previous Emission Source to go back to the previous emission source. This action will take you away from the current page if all mandatory fields are entered. You will not be able to view the previous subject item if you are currently viewing the first item.

Click the Delete icon to erase a row that you have added. You may not delete existing rows (rows that you have not added during this application process). You may not delete the first pollutant listed even if you added it; you can, however, change the pollutant listed using the drop-down list.

Pollutant Name — From the drop-down list, select the name of each pollutant being emitted from the emission source (one pollutant per row). Begin by filling in all of the criteria pollutants in alphabetical order, then fill in the HAPs in alphabetical order, then GHGs.

CAS Number — The CAS number for Hazardous Air Pollutants (HAPs) is auto-populated in this box.

Potential Emissions — In the three columns, express each emission source's potential-to-emit, for each pollutant (applies to both criteria and HAPs), in each of the following three ways:

In the Potential Lbs/Hr column, report the source's maximum controlled emissions rate (e.g., after taking into account pollution control equipment) in pounds per hour. If the source is subject to a state rule, federal regulation, or self-imposed limit which requires the source's emissions to be lower than the maximum controlled emission rate, fill in the maximum emission rate taking into account the rule, regulation, or self-imposed limit. For example a unit may have a maximum controlled particulate emission rate of 10 pounds per hour, but the state industrial process equipment rule may limit the emission rate from the source to 5 pounds per hour. In this case you would fill in 5 pounds per hour as your maximum controlled emission rate. The allowable values range from 0.000000000000 – 9,999,999,999.99999.

In the Unrestricted Potential (tons/yr) column, report the emission source's maximum uncontrolled emissions in tons per year. This is most commonly the emissions calculated using the equipment capacity, emission factor or mass balance, and 8760 hours of operation per year; it does not include limitations based on controls, rules, or proposed limits. The allowable values range from 0.000000000000 – 9,999,999,999.99999.

In the Potential Limited (tons/yr) column, report the emission source's limited controlled emissions in tons per year. This may simply be the controlled hourly emission rate from the first column multiplied by 8760 hours; the number may be further reduced if you are proposing conditions that limit emissions on an annual basis (such as a limit on hours of operation, or total production). If the limited controlled emissions are listed at the group, leave this column blank for the sources in the group. The allowable values range from 0.000000000000 – 9,999,999,999.99999.

Click Continue to access the next page.

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7/11/2022