Onshore Natural Gas Processing Plants

• Q484. Section 98.230(a)(3) states that processing plants "that do not fractionate but have an annual average throughput of 25 MMscf per day or greater" are included in the source category. Is this based on annual average daily flow or max design capacity?
• Q485. What is the definition of "fractionate" and "fractionation" in 98.230(a)(3)?
• Q487. Under onshore natural gas processing where are vent emissions reported?
• Q488. In 98.230(a)(3), is 25 mmscf per day the design capacity for a processing plant or the actual capacity?
• Q489. If a natural gas processing plant is co-located with an underground storage facility and they share compression, can they report as one combined facility?
• Q490. If fuel gas lines are not owned or operated by a gas processing facility, but are on the gas processing facility property, do the fuel gas lines need to be monitored for equipment leaks?
• Q491. Please confirm that a facility which processes an inlet gas stream with a methane content of less than 70% by volume, and a heating value of less than 910 Btu per standard cubic foot is excluded from the Onshore Natural Gas Processing segment.
• Q492. Are facilities designed solely to fractionate natural gas liquid streams (and do not receive a gaseous form of natural gas containing methane) subject to subpart W?
• Q493. How should I calculate the reporting threshold for onshore natural gas processing plants that do not fractionate gas liquids?
• Q494. What is the basis for the 25 MMscfd threshold for gas processing facilities in 98.230(a)(3) and how often must a facility re-evaluate whether it falls below this threshold?
• Q495. Which takes precedence for determining the Subpart W applicability of a natural gas processing facility- the 25,000 MT CO2e threshold (under 98.2(a)(2)) or the 25 MMscf per day throughput (under 98.230(a)(3))?
• Q496. May engineering calculations be used for flare gas composition in equations W-19 through W-21 if the flared stream is a combination of gases from before and after the demethanizer as well as hydrocarbon product?
• Q497. Does the onshore natural gas processing source category include the dehydrator or "knockout pot" in the example?
• Q498. Under subpart W, are we required to calculate potential GHG emissions from compressors at a natural gas processing facility that are only used for refrigeration and use 100% propane?
• Q499. Under Subpart W of Part 98, the definition of Natural Gas Processing provides an unclear explanation of fractionation, additionally, fractionation is not defined within the rule.