Q304. When asked in e-GGRT if a unit has a CEMS, is it specifically referring to a CO2 CEMS?

A304. The question is referring to whether CO2 emissions for a given process unit are calculated according to the Tier 4 calculation methodology specified in section 98.33(a)(4).  The question is not asking if a Continuous Emission Monitoring System or gas monitor of any kind is being use to monitor pollutant emissions for a given unit.