40 CFR Appendix Table HH-3 to Subpart HH of Part 98 - Landfill Gas Collection Efficiencies
Table HH-3 to Subpart HH of Part 98—Landfill Gas Collection Efficiencies
Table HH-3 to Subpart HH of Part 98—Landfill Gas Collection Efficiencies
| Description | Term ID | Landfill gas collection
efficiency |
|---|---|---|
| A1: Area with no waste in-place | Not applicable; do not use this area in the calculation. | |
| A2: Area without active gas collection, regardless of cover type | CE2 | 0%. |
| A3: Area with daily soil cover and active gas collection | CE3 | 50%. |
| A4: Area with an intermediate soil cover, or a final soil cover not meeting the criteria for A5 below, and active gas collection | CE4 | 65%. |
| A5: Area with a final soil cover of 3 feet or thicker of clay or final cover (as approved by the relevant agency) and/or geomembrane cover system and active gas collection | CE5 | 85%. |
| Area weighted average collection efficiency for landfills | CEave1 = (A2*CE2 + A3*CE3 + A4*CE4 + A5*CE5)/(A2 + A3 + A4 + A5). | |
[89 FR 31941, Apr. 25, 2024]