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74 FR 56374, Oct. 30, 2009, unless otherwise noted.
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At 90 FR 21227, May 19, 2025, as required by the Congressional Review Act and Public Law 119-2, the Environmental Protection Agency removed the amendments to §§ 98.3 and 98.4 made effective on Jan. 17, 2025, at 89 FR 91163, Nov. 18, 2024. As of May 19, 2025, §§ 98.3 and 98.4 reverted to the Jan. 16, 2025 version.
| Animal type | Typical animal mass (kg) |
Volatile solids excretion rate (kg VS/day/1000 kg animal mass) |
Nitrogen excretion rate (kg N/day/1000 kg animal mass) |
Maximum methane generation potential, Bo (m3 CH4/kg VS added) |
|---|---|---|---|---|
| Dairy Cows | 604 | See Table JJ-3 | See Table JJ-3 | 0.24 |
| Dairy Heifers | 476 | See Table JJ-3 | See Table JJ-3 | 0.17 |
| Dairy Calves | 118 | 6.41 | 0.30 | 0.17 |
| Feedlot Steers | 420 | See Table JJ-3 | See Table JJ-3 | 0.33 |
| Feedlot heifers | 420 | See Table JJ-3 | See Table JJ-3 | 0.33 |
| Market Swine <60 lbs | 16 | 8.80 | 0.60 | 0.48 |
| Market Swine 60-119 lbs | 41 | 5.40 | 0.42 | 0.48 |
| Market Swine 120-179 lbs | 68 | 5.40 | 0.42 | 0.48 |
| Market Swine >180 lbs | 91 | 5.40 | 0.42 | 0.48 |
| Breeding Swine | 198 | 2.60 | 0.24 | 0.48 |
| Feedlot Sheep | 25 | 9.20 | 0.42 | 0.36 |
| Goats | 64 | 9.50 | 0.45 | 0.17 |
| Horses | 450 | 10.00 | 0.30 | 0.33 |
| Hens >/= 1 yr | 1.8 | 10.09 | 0.83 | 0.39 |
| Pullets | 1.8 | 10.09 | 0.62 | 0.39 |
| Other Chickens | 1.8 | 10.80 | 0.83 | 0.39 |
| Broilers | 0.9 | 15.00 | 1.10 | 0.36 |
| Turkeys | 6.8 | 9.70 | 0.74 | 0.36 |