40 CFR Appendix Table 8 to Subpart CCCC of Part 63 - Monitoring System Requirements Timeline

For each . . .	During this time frame . . .	You must monitor VOC concentration by . . .
Existing affected source	Before 10/16/2017	Monitoring fermenter exhaust using a CEMS or by monitoring brew ethanol concentration using a brew ethanol monitor.
	Between 10/16/2017 and October 16, 2020	Monitoring fermenter exhaust using a VOC CEMS or by monitoring brew ethanol concentration using a brew ethanol monitor.
	On and after October 16, 2020	Monitoring fermenter exhaust using a VOC CEMS.
New or reconstructed affected source that you start up prior to 10/16/2017	Before 10/16/2017	Monitoring fermenter exhaust using a CEMS or by monitoring brew ethanol concentration using a brew ethanol monitor.
	Between 10/16/2017 and October 16, 2020	Monitoring fermenter exhaust using a VOC CEMS or by monitoring brew ethanol concentration using a brew ethanol monitor.
	On and after October 16, 2020	Monitoring fermenter exhaust using a VOC CEMS.
New or reconstructed affected source that you start up after 10/16/2017	After 10/16/2017	Monitoring fermenter exhaust using a VOC CEMS.