Code of Federal Regulations > Title 40 > Chapter I > Part 60 > Subpart Cb > Appendix - Table 3 to Subpart Cb of Part 60—Municipal Waste Combustor Operating Guidelines

Regulations last checked for updates: Mar 09, 2025

Title 40 - Protection of Environment last revised: Nov 09, 2025

Appendix - Table 3 to Subpart Cb of Part 60—Municipal Waste Combustor Operating Guidelines

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]

authority: 42 U.S.C. 7401

source: 36 FR 24877, Dec. 23, 1971, unless otherwise noted.