40 CFR Part 63, Table 1
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| For each fed-batch fermenter producing yeast in the following fermentation stage . . . | 98-percent option: You must not exceed the following VOC emission limitation a according to the timeline in Table 7 to this subpart . . . | Average option: You must not exceed the following VOC emission limitation a according to the timeline in Table 7 to this subpart . . . | Batch option: You must not exceed the following VOC emission limitation a according to the timeline in Table 7 to this subpart . . . |
|---|---|---|---|
| Last stage | 100 ppmv (measured as propane) for BAVOC for at least 98 percent of all batches in each 12-month calculation period described in § 63.2171(b) and (e) | 95 ppmv (measured as propane) for the average BAVOC of all batches in this stage in each 12-month calculation period described in § 63.2171(c) and (e) | 100 ppmv (measured as propane) for BAVOC for each batch. |
| Second-to-last stage | 200 ppmv (measured as propane) for BAVOC for at least 98 percent of all batches in each 12-month calculation period described in § 63.2171(b) and (e) | 190 ppmv (measured as propane) for the average BAVOC of all batches in this stage in each 12-month calculation period described in § 63.2171(c) and (e) | 200 ppmv (measured as propane) for BAVOC for each batch. |
| Third-to-last stage | 300 ppmv (measured as propane) for BAVOC for at least 98 percent of all batches in each 12-month calculation period described in § 63.2171(b) and (e) | 285 ppmv (measured as propane) for the average BAVOC of all batches in this stage in each 12-month calculation period described in § 63.2171(c) and (e) | 300 ppmv (measured as propane) for BAVOC for each batch. |
a The emission limitation does not apply during the production of specialty yeast.