Please see Reporting Form Instructions instructions on downloading the blank reporting form and uploading the completed reporting form.
You may also refer to Optional Calculation Spreadsheet Instructions to download the Subpart W calculation spreadsheet.
This page provides an overview of the Subpart W e-GGRT reporting requirements for the flare stacks source category and emissions from flares.
The flare stack emissions category is applicable to Onshore Petroleum and Natural Gas Production and Onshore Natural Gas Processing segments.
Emissions from flares at subpart W facilities are reportable under one of three authorities within part 98, including:
- Flare stack emissions, as calculated under §98.233(n), are a reportable source for Onshore Petroleum and Natural Gas Production facilities and Natural Gas Processing facilities, per §98.232(c)(9) and §98.232(d)(6), respectively
- Source-specific “vented to flare” emissions reporting; as specified in §98.236 for dehydrators, gas well completions and workovers, gas from produced oil sent to atmospheric tanks, transmission tanks, well testing, associated gas venting and flaring, centrifugal compressors, and reciprocating compressors; and
- For Offshore Petroleum and Natural Gas Production facilities, per §98.236(b) emissions from flares are reported separately on the Offshore Emission Source tab.
Because flare stack emission at Subpart W facilities are potentially reported in a number of places, the EPA has offered the following simple hierarchy among the reporting categories to ensure that emissions from flares are not double counted per 98.233(n)(10):
- If emissions are reported under a source-specific “vented to flare” reporting category, as list above, those specific emissions should be reported under that source and not reported elsewhere in the facility’s annual GHG reporting.
- Flare stack emission at Onshore Petroleum and Natural Gas Production facilities and Natural Gas Processing facilities that are not captured under (1) should be reported under the flare stack emission per §98.233(n). To the extent that monitoring information includes amounts associated with reported emission under (1), those emissions should be deducted from the total emissions reported according to the methods in §98.233(n).
|Flares that are not associated with onshore petroleum and natural gas production, onshore natural gas processing or offshore petroleum and natural gas production facilities and not associated specific source types are exempt under Subpart C (§98.30(a)(4)) and not required to be reported|
Please refer to FAQ 667 for further information on the applicability of combustion emissions at Subpart W facilities.
The reporting of flare stack emissions on the Flare Stacks tab in the Subpart W Reporting Form is composed of several elements as follows:
- If the source type is present you must report required emissions.
If the facility has the source type, the Best Available Monitoring Methods and Missing Data table must be completed.
- For further information, see Best Available Monitoring Methods and Missing Data Reporting.
For each flare, the facility is required to report:
- Unique name or ID number for the flare stack (98.236(c)(12)(x)) - this data element is only required for Onshore Natural Gas Processing facilities
- Does the flare have a continuous flow monitor? (Yes or No) (98.236(c)(12)(i))
- Percent of gas sent to un-lit flare determine by engineering estimate and process knowledge based on best available data and operating records (98.236(c)(12)(iii))
- Does the flare have a continuous gas analyzer? (Yes or No) (98.236(c)(12)(iv))
- Were CEMS used to measure CO2 emissions for the flare stack? (Yes or No) (98.236(c)(12)(xi))
- If Yes, the facility must report:
- If CEMS were used, combusted and uncombusted CO2 (98.236(c)(12)(iii))
- Do not report data for the remaining fields
- If No, the facility must report:
- Uncombusted CO2 emissions (98.236(c)(12)(vii))
- Uncombusted CH4 emissions (98.236(c)(12)(vi))
- Combusted CO2 emissions (98.236(c)(12)(viii))
- N2O emissions (98.236(c)(12)(ix))
- Do not report data for "If CEMS were used, combusted and uncombusted CO2"
- If Yes, the facility must report:
The total emissions roll-up reflects the sum of the CO2 equivalents of each required gas emission for the source type. These summations are reflected and aggregated on the Introduction tab.