40 CFR Part 63, Table 8
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| 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. |