40 CFR Part 60, Table 3 — Municipal Waste Combustor Operating Guidelines
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| Municipal waste combustor technology | Carbon monoxide emissions levels (parts per million by volume) a | Averaging time (hrs) b |
|---|---|---|
| Mass burn waterwall | 100 | 4 |
| Mass burn refractory | 100 | 4 |
| Mass burn rotary refractory | 100 | 24 |
| Mass burn rotary waterwall | 250 | 24 |
| Modular starved air | 50 | 4 |
| Modular excess air | 50 | 4 |
| Refuse-derived fuel stoker | 200 | 24 |
| Fluidized bed, mixed fuel (wood/refuse-derived fuel) | 200 | c 24 |
| Bubbling fluidized bed combustor | 100 | 4 |
| Circulating fluidized bed combustor | 100 | 4 |
| Pulverized coal/refuse-derived fuel mixed fuel-fired combustor | 150 | 4 |
| Spreader stoker coal/refuse-derived fuel mixed fuel-fired combustor | 200 | 24 |
| Semi-suspension refuse-derived fuel-fired combustor/wet refuse-derived fuel process conversion | 250 | c 24 |
| Spreader stoker fixed floor refuse-derived fuel-fired combustor/100 percent coal capable | 250 | c 24 |
a Measured at the combustor outlet in conjunction with a measurement of oxygen concentration, corrected to 7 percent oxygen, dry basis. Calculated as an arithmetic average.
b Averaging times are 4-hour or 24-hour block averages.
c 24-hour block average, geometric mean.
[71 FR 27334, May 10, 2006]