40 CFR Part 63, Table 2
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| For each fed-batch fermenter for which compliance is determined by monitoring brew ethanol concentration and calculating VOC concentration in the fermenter exhaust according to the procedures in § 63.2161, you must . . . | Using . . . | According to the following requirements . . . |
|---|---|---|
| Measure VOC as propane | Method 25A,a or an alternative validated by EPA Method 301 b and approved by the Administrator | You must measure the VOC concentration in the fermenter exhaust at any point prior to the dilution of the exhaust stream. |
a EPA Test Method 25A is found in appendix A-7 of 40 CFR part 60.
b EPA Test Method 301 is found in appendix A of 40 CFR part 63.