Cal e-GGRT Help

Subpart NN Local Distribution Companies (LDCs)

Note: The Cal e-GGRT help system includes general instruction on using the California GHG reporting tool. However, the help system may not explain differences between California and U.S. EPA reporting requirements. Please refer to the ARB reporting website for California-specific reporting requirements and additional help.

Created by Theresa Mastrian, last modified by Peter Kobylarek on Feb 22, 2012

This page provides a step-by-step description of how to enter Subpart NN GHG data for LDCs.

The GHG information required for LDCs includes five steps:

#Step 1 - Equation NN-1 Summary and Results
#Step 2 - Equation NN-3 Summary and Results
#Step 3 - Equation NN-4 Summary and Results
#Step 4 - Equation NN-5 Summary and Results
#Step 5 - Equation NN-6 Summary and Results
#Step 6 - Additional Information Required for LDCs

Each step is described below

Step 1 - Equation NN-1 Summary and Results

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Find the table titled "GHG SUMMARY" and click OPEN.

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From the Equation NN-6 Summary page, click NEXT.

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Cal e-GGRT will guide you to the Equation NN-1 overview page where you can use the radio buttons to indicate the source of reported GHG quantities associated with natural gas received at city gate stations. You can either use the calculated result, or choose to enter your own result.

If you elect to enter your own result, enter the quantity of CO₂ associated with the natural gas received at city gate stations (in metric tons of CO₂) in the space provided, then click NEXT. If you choose to use Cal eGGRT to calculate the result for you, simply click NEXT without entering a value.

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In the spaces provided, enter the:

Total annual MMBtu of non-biomass natural gas received at the city gate
Total annual MMBtu of biomethane received at the city gate
Total annual MMBtu of non-exempt biomethane received at the city gate
Days in the reporting year for which substitute data procedures were used
Use the drop-down menu to select the industry standard used to measure the volume

When finished, click NEXT.

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Use the radio buttons to indicate your source for the CO₂ emissions factor.

If you elect not to use the default value, in the spaces provided, enter your own CO₂ emissions factor (in kilograms CO₂ per million Btu) as well as the number of days during the reporting year for which substitute data procedures were used to determine the emissions factor.

When finished, click NEXT.

Step 2 - Equation NN-3 Summary and Results

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On the Subpart NN Equation NN-3 overview page, use the radio buttons to indicate the source of reported CO₂ quantities from product delivered to downstream transmission pipelines or other LDCs in quantities less than 460,000 thousand scf per year.

If you elect to enter your own result, enter the total CO₂ quantity from natural gas delivered to downstream transmission pipelines or other LDCs (metric tons) in the space provided then click NEXT. If you choose to use Cal eGGRT to calculate the result for you, simply click NEXT without entering a value.

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In the spaces provided, enter the:

Total annual MMBtu of natural supplied
Total annual MMBtu of biomethane supplied
Total annual MMBtu of non-exempt biomethane supplied
Number of days during the reporting year for which substitute data procedures were used to determine this value.

When finished, click NEXT.

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Use the radio buttons to indicate your source for the CO₂ emissions factor.

If you elect not to use the default value, enter your own CO₂ emissions factor (in metric tons CO₂ per thousand standard cubic feet) and the number of days missing data procedures were used to determine this value in the space provided.

Then use the drop-down menu to select the industry standard used to measure the value.

When finished, click NEXT.

Step 3 - Equation NN-4 Summary and Results

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On the Subpart NN NN-4 Annual Volume of NG Received by End-Users page, use the radio buttons to indicate the source of reported GHG quantities from natural gas received by end-users that receive a supply greater than or equal to 460,000 thousand standard cubic feet per year.

Subpart NN requires you to enter the following information for each meter registering a supply equal to or greater than 460,000 thousand standard cubic feet during the reporting year. If you did not deliver 460,000 thousand standard cubic feet of natural gas to any meters during the reporting year, you may click NEXT and proceed to step 4 of these instructions. Otherwise, click the ADD A METER button and enter the information below.

Customer Name
Customer Address (street address, city, state, zip code)*
Meter Number
Customer's EIA identification number (if known)**
The annual volume of natural gas delivered to the meter (in MMBtu)

* Note that you should report the customer’s physical address, if the physical address is known. Should a facility you deliver gas to not have a physical address, the facility's mailing address may be used.

** Note that LDCs are only required to report this information if known. The EIA identification number referenced here is a number assigned to electric power plants who report on EIA Form EIA-923 (Power Plant Operations Report). Each facility who reports on this form is assigned a “Plant ID” number by EIA, which is a unique number for each power generating facility. This identification number is from 1 to 5 digits in length and can be found in the files under “Downloads” located at: http://www.eia.gov/cneaf/electricity/page/eia906_920.html. Reporting of this identification number is not required.

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For each meter, enter the requested data. When finished, click SAVE.

To edit the details of a particular meter, click EDIT.

Once the required information has been entered for all meters, click NEXT.

Step 4 - Equation NN-5 Summary and Results

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On the Subpart NN Equation NN-5 overview page, use the radio buttons to indicate the source of reported CO₂ quantities from the net product that is liquefied and/or stored/removed from storage and received from local production by the LDC within the reporting year.

If you elect to enter your own result, enter your CO₂ quantity from the net product that is liquefied and/or stored/removed from storage and received from local production by the LDC within the reporting year (in metric tons) in the space provided then click NEXT. If you choose to use eGGRT to calculate the result for you, simply click NEXT without entering a value.

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In the spaces provided, enter the:

Total annual MMBtu of natural gas received at the city gate and stored on-system or liquefied and stored
Total annual MMBtu of biomethane received at the city gate and stored on-system or liquefied and stored
Total annual MMBtu of non-exempt biomethane received at the city gate and stored on-system or liquefied and stored
Days in reporting year for which substitute data procedures were used

When finished, click NEXT.

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Enter the following information in the spaces provided:

For Fuel 2A:
- Annual MMBtu of vaporized liquefied natural gas produced at on-system vaporization facilities for delivery on the distribution system that is not accounted for in the MMBtu collected under NN-1
- Annual MMBtu of vaporized liquefied biomethane produced at on-system vaporization facilities for delivery on the distribution system that is not accounted for in the MMBtu collected under NN-1
- Annual MMBtu of vaporized liquefied non-exempt biomethane produced at on-system vaporization facilities for delivery on the distribution system that is not accounted for in the MMBtu collected under NN-1
- Days in reporting year for which substitute data procedures were used
For Fuel 2B:
- Annual MMBtu of natural gas withdrawn from on-system storage (that is not delivered to the city gate) for delivery on the distribution system
- Annual MMBtu of biomethane withdrawn from on-system storage (that is not delivered to the city gate) for delivery on the distribution system
- Annual MMBtu of non-exempt biomethane withdrawn from on-system storage (that is not delivered to the city gate) for delivery on the distribution system
- Days in reporting year for which substitute data procedures were used
For Fuel 2C
- Annual MMBtu of natural gas delivered directly to the LDC systems from producers or natural gas processing plants from local production
- Annual MMBtu of biomethane delivered directly to the LDC systems from producers or natural gas processing plants from local production
- Annual MMBtu of non-exempt biomethane delivered directly to the LDC systems from producers or natural gas processing plants from local production
- Days in reporting year for which substitute data procedures were used

When finished, click NEXT.

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Use the radio buttons to indicate your source for the CO₂ emissions factor.

If you elect not to use the default value, enter your own CO₂ emissions factor (in metric tons CO₂ per MMBtu) and the number of days during the reporting year that substitute data procedures were used to determine this value in the space provided.

Then use the drop-down menu to select the industry standard used to measure the volume.

When finished, click NEXT.

Step 5 - Equation NN-6 Summary and Results

Cal e-GGRT will use the calculated results from Equations NN-1 , NN-3, NN-4, and NN-5 in Equation NN-6 to calculate CO₂ quantities associated with the combustion or oxidation of natural gas supplied to end-users that receive less than 460,000 thousand standard cubic feet (mscf) per year.

Review the results of each individual equation and the result of equation NN-6.

Note that the value for CO₂l may either be positive or negative depending on whether more natural gas was withdrawn from storage/received from local production or placed into storage during the reporting year.

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When you are satisfied that all entered data is correct, click FINISHED.

Step 6 - Additional Information Required for LDCs

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For LDCs, Subpart NN requires you to report the following data:

The total annual volume (in thousand standard cubic feet) of Natural Gas delivered to each of the following end-user categories:
- Residential consumers
- Commercial consumers
- Industrial consumers
- Electricity generating facilities

For definitions of these categories, refer to EIA Form 176 (Annual Report of Natural Gas and Supplemental Gas Supply & Disposition) and Instructions: http://www.eia.doe.gov/pub/oil_gas/natural_gas/survey_forms/eia176i.pdf

Starting on the Subpart NN Overview page, find the NATURAL GAS VOLUMES BY END USE CATEGORY (MSCF) table and click OPEN

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Enter the total annual volume (in thousand standard cubic feet) of Natural Gas delivered to residential, commercial and industrial consumers as well as electricity generating facilities

When finished, click SAVE

#Back to Top

Step 1 - Equation NN-1 Summary and Results

Step 2 - Equation NN-3 Summary and Results

Step 3 - Equation NN-4 Summary and Results

Step 4 - Equation NN-5 Summary and Results

Step 5 - Equation NN-6 Summary and Results

Step 6 - Additional Information Required for LDCs

See Also