final KKKKa temporary-turbine subcategory for small and medium turbines (≤850 MMBtu/h): electing units may remain at one location for up to 24 consecutive months; natural-gas units meet 25 ppm NOx at 15% O₂
≤850 MMBtu/h / ≤24 consecutive mo / 25 ppm NOx at 15% O₂observed
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | Affected temporary turbines ≤850 MMBtu/h: ≤24 consecutive months under 60.4331a; relocation within the source does not reset residence. Natural-gas concentration option: 25 ppmvd at 15% O₂, four-operating-hour average. Chapter 6.8’s emissions table gives utilization/exclusions and the output alternative. Neither RICE allowance nor permit exemption. |
| As of | 2026-07-16 |
| Source | EPA final rule 2026-01-15 and technical correction 2026-07-16, effective 2026-08-17. · Corrected 60.4420a utilization definition (PDF p. 8); Table 1 and notes 1–2 (PDF pp. 8–9); temporary category read with 60.4331a. |
| Review | checking…review by 2027-03-05 · standard cadence |
| Recorded changes | last 2026-09-16 · 3 revisions tracked |
| Claim id | temporary-turbine-subcategory-window-850-mmbtu |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.