Please see Reporting Form 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 onshore petroleum and natural gas production and natural gas distribution combustion emissions source category reporting requirements.

The onshore petroleum and natural gas production and natural gas distribution combustion emissions source category is applicable to Onshore Petroleum and Natural Gas Production and Natural Gas Distribution.

Please refer to FAQ 667 for further information on the applicability of combustion emissions at Subpart W facilities.

Indicate if the facility has the source type via the radio buttons.

• If the source type is present you must report required elements.

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.

Reporting Requirements

For each external fuel combustion unit, by type, with a heat capacity equal to or less than 5 mmBtu/hr, the facility is required to report:

• Type of Unit (98.236(c)(19(i))
  • Well drilling and completion equipment
  • Workover equipment
  • Steam Boilers
  • Process heaters
• Number of Units (98.236(c)(19)(i))

For each external fuel combustion unit, by type, with a heat capacity greater than 5 mmBtu/hr, the facility must report:

• Type of Unit (98.236(c)(19)(ii))
  • Well drilling and completion equipment
  • Workover equipment
  • Steam boilers
  • Process heaters
• Number of Units (98.236(c)(19)(ii))
• Annual CO₂ emissions (98.236(c)(19)(iii))
• Annual CH₄ emissions (98.236(c)(19)(iii))
• Annual N₂O emissions (98.236(c)(19)(iii))

For each internal fuel combustion unit, by type, with a heat capacity equal to or less than 1 mmBtu/hr or 130 horsepower, the facility must report:

• Type of Unit (98.236(c)(19)(v))
  • Well drilling and completion equipment
  • Workover equipment
  • Natural gas compressors
  • Electrical generators
• Number of Units (98.236(c)(19)(v))

For each internal fuel combustion unit, by type, with a heat capacity greater than 1 mmBtu/hr, the facility must report:

• Type of Unit (98.236(c)(19)(vi))
  • Well drilling and completion equipment
  • Workover equipment
  • Natural gas compressors
  • Electrical generators
• Annual CO₂ emissions (98.236(c)(19)(vi))
• Annual CH₄ emissions (98.236(c)(19)(vi))
• Annual N₂O emissions (98.236(c)(19)(vi))

For external fuel combustion units with a heat capacity greater than 5 mmBtu/hr, complete the following table:

• Type of fuel combusted (98.236(c)(19)(iv))
• Pipeline gas
• Field gas
• Distillate Fuel Oil No. 2
• Motor gasoline
• Propane
• Agricultural Byproducts
• Anthracite
• Asphalt and Road Oil
• Aviation Gasoline
• Biodiesel (100%)
• Biomass fuels—gaseous
• Biomass Fuels—Liquid
• Biomass fuels—solid
• Bituminous
• Blast Furnace Gas
• Butane
• Butylene
• Coal Coke
• Coke Oven Gas
• Crude Oil
• Distillate Fuel Oil No. 1
• Distillate Fuel Oil No. 4
• Ethane
• Ethanol
• Ethylene
• Fuel Gas
• Heavy Gas Oils
• Isobutane
• Isobutylene
• Kerosene
• Kerosene-Type Jet Fuel
• Landfill Gas
• Lignite
• Liquefied petroleum gases (LPG)
• Lubricants
• Mixed (Commercial sector)
• Mixed (Electric Power sector)
• Mixed (Industrial coking)
• Mixed (Industrial sector)
• Motor Gasoline
• Municipal Solid Waste
• Naphtha (<401 deg F)
• Natural Gasoline
• Other Biomass Gases
• Other Oil (>401 deg F)
• Peat
• Pentanes Plus
• Petrochemical Feedstocks
• Petroleum Coke
• Plastics
• Propane Gas
• Propane
• Propylene
• Rendered Animal Fat
• Residual Fuel Oil No. 5
• Residual Fuel Oil No. 6
• Solid Byproducts
• Special Naphtha
• Subbituminous
• Tires
• Unfinished Oils
• Used Oil
• Vegetable Oil
• Wood and Wood Residuals (dry basis)
• Cumulative volume of fuel combusted (98.236(c)(19)(iv))
• Fuel Volume Units )98.236(c)(19)(iv))
  •  mton
  • lb
  • gal
  • bbl
  • kg
  • actual cubic ft
  • std. cubic ft
  • std. cubic meter

For internal fuel combustion units with a heat capacity greater than 1 mmBtu/hr, complete the following table:

• Type of fuel combusted (98.236(c)(19)(vii))
  • Pipeline gas
  • Field gas
  • Distillate Fuel Oil No. 2
  • Motor gasoline
  • Propane
  • Agricultural Byproducts
  • Anthracite
  • Asphalt and Road Oil
  • Aviation Gasoline
  • Biodiesel (100%)
  • Biomass fuels—gaseous
  • Biomass Fuels—Liquid
  • Biomass fuels—solid
  • Bituminous
  • Blast Furnace Gas
  • Butane
  • Butylene
  • Coal Coke
  • Coke Oven Gas
  • Crude Oil
  • Distillate Fuel Oil No. 1
  • Distillate Fuel Oil No. 4
  • Ethane
  • Ethanol
  • Ethylene
  • Fuel Gas
  • Heavy Gas Oils
  • Isobutane
  • Isobutylene
  • Kerosene
  • Kerosene-Type Jet Fuel
  • Landfill Gas
  • Lignite
  • Liquefied petroleum gases (LPG)
  • Lubricants
  • Mixed (Commercial sector)
  • Mixed (Electric Power sector)
  • Mixed (Industrial coking)
  • Mixed (Industrial sector)
  • Motor Gasoline
  • Municipal Solid Waste
  • Naphtha (<401 deg F)
  • Natural Gasoline
  • Other Biomass Gases
  • Other Oil (>401 deg F)
  • Peat
  • Pentanes Plus
  • Petrochemical Feedstocks
  • Petroleum Coke
  • Plastics
  • Propane Gas
  • Propane
  • Propylene
  • Rendered Animal Fat
  • Residual Fuel Oil No. 5
  • Residual Fuel Oil No. 6
  • Solid Byproducts
  • Special Naphtha
  • Subbituminous
  • Tires
  • Unfinished Oils
  • Used Oil
  • Vegetable Oil
  • Wood and Wood Residuals (dry basis)
• Cumulative volume of fuel combusted (98.236(c)(19)(vii))
• Fuel Volume Units )98.236(c)(19)(vii))
  •  mton
  • lb
  • gal
  • bbl
  • kg
  • actual cubic ft
  • std. cubic ft
  • std. cubic meter

Total Emissions

The total emissions roll-up at the top of the sheet reflects the sum of the CO₂ equivalents of each gas emission reported for the source type.  These summations are reflected and aggregated on the Introduction tab.