This page provides step-by-step instructions on how to enter and edit Subpart N Glass Production emissions information for furnaces that are NOT monitored by a Continuous Emissions Monitoring System (CEMS).
Step 1: Select a furnace
To select a furnace for which to enter emissions data, find the unit in the GLASS MELTING FURNACE SUMMARY table and click OPEN. You will then be on the Eq. N-1 form.
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Step 2: Equation Summary and Result
For each glass melting furnace NOT monitored by CEMS, enter the CO2 process emissions in metric tons. Be sure to check the units. This number is the output of Equation N-1. To calculate this value:
- Click the link "Use Subpart N equation spreadsheets to calculate"
- Follow the instructions
- Complete and save the spreadsheet
- Enter the result in the red box
- Upload the completed spreadsheet using the EQUATION SPREADSHEET ATTACHMENTS space provided
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Step 3: Raw Material Data
For each raw material charged to each glass melting furnace, provide the following:
- The number of months during the reporting year that you followed missing data procedures for the monthly quantities of the raw material
- The method you used to determine the fraction of calcination for the raw material (Default Value (1.0), Chemical analysis using x-ray fluorescence, or Other)
- The number of months during the reporting year that you followed missing data procedures for the mass fractions of the raw material
Step 4: Mass Fraction Verification Test Data
For each mass fraction verification test conducted for each raw material, provide the following:
- The test date
- The method(s) and any variations used in the analyses. If you chose to use the default as an alternative to supplier data (option in 98.143(c)), in the TEST DETAILS section enter “Default Method per 98.143(c)” for “Methods and any variation used in the analysis.” The mass fraction values for all test samples recorded during the test (mass fraction should be expressed as a decimal value from 0.0 to 1.0). If you chose to use the default as an alternative to supplier data, enter 1.0 in the TEST SAMPLE(S) section, consistent with the default value provided in 98.143(c) for “Mass fraction of sample.”
To add mass fraction verification tests for a raw material, click "Add A Test" and enter the required information.
When you have finished entering tests, click SAVE.
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Step 5: Save emissions and raw material data for a furnace
When you have finished entering emissions and raw material data, click SAVE. You will then return to the Subpart Overview page and you should see the status of data entry for the furnace change to “Complete” in the Status column in the GLASS MELTING FURNACE SUMMARY table.
If you do not have all the data it will remain incomplete. You can always enter some now, save it, then finish it later.
After you save the data on this page, the next time you open the page, the calculator on the top of the page will display the CO2 process emissions for a furnace, rounded to the nearest metric ton. The value displayed is for informational purposes only.
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Step 6: Repeat Steps 1-5
Repeat Steps 1-5 until emissions data have been entered for all furnaces NOT monitored by CEMS.
See Also
Screen Errors
Using Cal e-GGRT to Prepare Your Subpart N Report
Subpart N Summary Information for this Facility
Subpart N Furnace Information
Subpart N Emissions Information for Furnaces Monitored by CEMS
Subpart Validation Report