Subpart Y. Petroleum Refineries
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Subpart Y. Petroleum Refineries
- Q123. For petroleum refineries, which subpart should be followed for flare calculations? Section 98.252(a) says to use Subpart C. However, section 98.253(b) specifies a method for flares.
- Q342. Are you required to submit information for all of the "facility-level emissions" categories within Subpart Y, even if no emissions exist for some categories?
- Q345. For storage tank emissions reported in Subpart Y, do you enter aggregate emissions or emissions on a tank-by-tank basis?
- Q656. My fluidized catalytic cracking unit (FCCU) is monitored by a CEMs. How should those emissions be reported?
- Q657. What configuration should I use to report a CEMS that monitors the emissions from a catalytic cracking unit with a complete combustion regenerator (no CO boiler) that burns off petroleum coke deposited on the catalyst particles?
- Q658. Under the process-only configuration, should I enter "petroleum coke" or "catalyst coke" into the "Types of fuel combusted in the unit(s) monitored by the CEMS" field?
- Q659. I have a CEMS that monitors the emissions from a CO boiler that receives process gas from a catalytic cracking unit. Should I report this as a "process-only" configuration or as a "shared process-combustion stack" configuration?
- Q660. Under the "shared process-combustion stack" configuration, should I enter "regenerator flue gas" or "FCCU process gas" in the "Types of fuel combusted in the unit(s) monitored by the CEMS" field since the CO boiler burns mostly these fuels?
- Q661. Under the "process-only" configuration, should I leave "CO2 emissions attributable to process CO2 emissions" blank because I've already reported all my CO2 emissions under the "Annual CO2 Emissions" section?
- Q662. Under the "shared process-combustion stack" configuration, how do I report my process emissions given that there are both process and combustion emissions?
- Q663. Under the "process-only" configuration, what do I report under "Equation C-10 Summary and Results"?
- Q664. Under the "shared process-combustion stack" configuration, under "Equation C-10 Summary and Results", do I report the total CH4 and N2O emissions at the CML or only the emissions from the combustion of auxiliary fuels used in the CO boiler?
- Q700. Should material vented to a flare on a daily or otherwise frequent basis due to the cyclic operation of certain units be considered a startup, shutdown, or malfunction (SSM) event in Equation Y-3?
- Q701. In Equation Y-3, startup, shutdown, or malfunction (SSM) events exceeding 500,000 standard cubic feet per day (scf per day) must be reported. What time period and flare gas volume should be used to assess if this threshold was exceeded?
- Q702. For a startup, shutdown, or malfunction (SSM) event lasting several days, should the flare flow term in Equation Y-3 include the cumulative flow for the entire event or only for the day(s) during which the 500,000 scf per day threshold was exceeded?