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Help Site PROD > GHG Reporting Instructions > Preparing Your Annual GHG Reporting > Subpart Reporting Instructions > Subpart P - Hydrogen Production > Using e-GGRT to Prepare Your Subpart P Report for RY2014 and Later > Subpart P Emissions Information for Process Units Monitored by CEMS for All Reporting Years
Subpart P Emissions Information for Process Units Monitored by CEMS for All Reporting Years
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This page provides step-by-step instructions on how to enter and edit Subpart P Hydrogen Production emissions information for process units that are monitored by a CEMS.

Step 1: Add a CEMS Monitoring Location (CML)

To add a CML, click the “Add a CEMS Monitoring Location” link below the CEMS MONITORING LOCATION (CML) SUMMARY table on the Subpart Overview page

The screenshot below is from Subpart G and is displayed as an example. The screen for other subparts may differ slightly.

Click this link to expand

Step 2: Define a CML and report emissions information

For each CEMS Monitoring Location, provide the following information:

  • A unique unit name or identifier for the CML (see also About Unique Unit Names)
  • An optional description or label for the CML
  • The configuration of processes or process units that are monitored by the CML:
    • Single process or process unit that exhausts to a dedicated stack
    • Multiple processes or process units that share a common stack
    • Process or process unit that shares a common stack with one or more stationary fuel combustion units
  • The types of fuel combusted in the unit(s) monitored by the CEMS
  • The Tier 4/CEMS methodology start and end dates
  • The total hourly CO2 mass emissions for each quarter of the reporting year (metric tons) (Do not cumulate emissions data between quarters)
  • The total annual CO2 mass emissions measured by the CEMS (metric tons)(This is the sum of the four quarterly totals)
  • An indication whether emissions reported for the CEMS include emissions calculated according to 98.33(a)(4)(viii) for a slipstream that bypassed the CEMS
  • The total annual biogenic CO2 emissions from the combustion of all biomass fuels combined (metric tons) (if not applicable, enter '0')
  • The total annual non-biogenic CO2 emissions which includes fossil fuel, sorbent, and process CO2 emissions (metric tons)
  • The total annual CH4 and N2O emissions associated with the combustion of all Table C-2 fuels combusted in all processes/process units monitored by the CEMS derived from application of Equation C-10 (metric tons) (if there are no combustion emissions in this CML, please enter '0')
  • The total number of source operating hours in the reporting year
  • The total operating hours in which a substitute data value was used in the emissions calculations for the CO2 concentration parameter
  • The total operating hours in which a substitute data value was used in the emissions calculations for the stack gas flow rate parameter
  • If moisture correction is required and a continuous moisture monitor is used, the total operating hours in which a substitute data value was used in the emissions calculations for the stack gas moisture content parameter
  • The total annual CO2 emissions from the CEMS Monitoring Location (CML) Summary attributable to combustion (metric tons)

Do not leave any of these fields blank. If, for example, your facility has no biogenic CO2 emissions, enter '0'.

For assistance in calculating annual CH4 and N2O emissions using Equation C-10, access the optional calculation spreadsheet by clicking one of the links titled “Use Equation C-10 spreadsheet to calculate” located below each of the red emissions information data entry boxes and follow the provided instructions

Step 3: Identify process units monitored at a CML

To identify the process units monitored at a CML, first click the link titled “ADD/REMOVE a process unit that exhausts to this CEMS Monitoring Location” at the bottom of the page

The screenshot below is from Subpart G and is displayed as an example. The screen for other subparts may differ slightly.

Click this link to expand

On the CML Process Units Selection page, use the check boxes to select the process unit(s) monitored at this CML. This will indicate that the unit(s) selected vent emission through the stack monitored by this CML.

The screenshot below is from Subpart G and is displayed as an example. The screen for other subparts will differ slightly depending on the number of units with emissions monitored by a single CML at your facility.

Click this link to expand

When finished selecting process unit for the CML and entering additional required information (if applicable), click SAVE. You should then be directed back to the Add/Edit a CML Location form and see the units you selected listed in the CEMS MONITORING LOCATION (CML) PROCESS UNITS table.

Step 4: Save entered data for a CML

When you have finished entering data for a CML, click SAVE. You will then return to the Subpart Overview page. You will see the status of data entry for the CML updated to “Complete” in the Status column in the CEMS MONITORING LOCATION (CML) SUMMARY table.

If you don't have all the data, you can enter some now, save it, and finish later by clicking on the hyperlinked name of the CML in the CEMS MONITORING LOCATION (CML) SUMMARY table.

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 the CML, rounded to the nearest 0.1 of a metric ton. The value displayed is for informational purposes only.

Step 5: Repeat Steps 1-4

Repeat Steps 1-4 until emissions information has been entered for all CMLs. If you have missed something, the validation report messages will help you identify any incomplete entries.

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See Also

Screen Errors
Using e-GGRT to Prepare Your Subpart P Report for RY2014 and Later
Using e-GGRT to Prepare Your Subpart P Report for RY2013 and Prior Years
Subpart P Summary Information for this Facility for All Reporting Years
Subpart P Process Unit Information for Units NOT Monitored by CEMS for All Reporting Years
Subpart P Process Unit Information for Units Monitored by CEMS for All Reporting Years
Subpart P Emissions Information for Process Units NOT Monitored by CEMS for RY2014 and Later
Subpart P Entering Equation Inputs Using IVT
Subpart P Emissions Information for Process Units NOT Monitored by CEMS for RY2013 and Prior Years
Using Subpart P Calculation Spreadsheets
Subpart P Emissions Information for Process Units Monitored by CEMS for All Reporting Years
Subpart Validation Report

This web site is maintained by a contractor to the U.S. Environmental Protection Agency (RY2017.R.01)