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Table 8 to Subpart CCCC of Part 63—Monitoring System Requirements Timeline

Monitoring System Requirements Timeline

  1. CFR
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  3. Title 40
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  5. Chapter I
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  7. Part 63
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  9. Subpart CCCC
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  11. Subject Group Other Requirements and Information
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  13. Appendix Table 8 to Subpart CCCC of Part 63
CorpusDaily eCFR
Displayed edition2026-04-27
Last updated2026-04-27

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 sourceBefore 10/16/2017Monitoring fermenter exhaust using a CEMS or by monitoring brew ethanol concentration using a brew ethanol monitor.
Between 10/16/2017 and October 16, 2020Monitoring fermenter exhaust using a VOC CEMS or by monitoring brew ethanol concentration using a brew ethanol monitor.
On and after October 16, 2020Monitoring fermenter exhaust using a VOC CEMS.
New or reconstructed affected source that you start up prior to 10/16/2017Before 10/16/2017Monitoring fermenter exhaust using a CEMS or by monitoring brew ethanol concentration using a brew ethanol monitor.
Between 10/16/2017 and October 16, 2020Monitoring fermenter exhaust using a VOC CEMS or by monitoring brew ethanol concentration using a brew ethanol monitor.
On and after October 16, 2020Monitoring fermenter exhaust using a VOC CEMS.
New or reconstructed affected source that you start up after 10/16/2017After 10/16/2017Monitoring fermenter exhaust using a VOC CEMS.