Code of Federal Regulations > Title 40 > Chapter I > Part 60 > Subpart WWWW > Appendix - Table 3 to Subpart WWWW of Part 60—Model Rule—Emission Limits for Existing Large Municipal Waste Combustors

Regulations last checked for updates: May 30, 2026

Title 40 - Protection of Environment last revised: Aug 30, 2026

Appendix - Table 3 to Subpart WWWW of Part 60—Model Rule—Emission Limits for Existing Large Municipal Waste Combustors

For the air pollutant . . .	For this combustor type . . .	You must meet this emission limit, corrected to 7 percent oxygen ^a . . .
Particulate matter	All	20 mg/dscm.
Opacity	All	10 percent opacity (6-minute block average).
Cadmium	All	10 ug/dscm.
Lead	All	68 ug/dscm.
Mercury	All	50 ug/dscm or 85 percent reduction by weight.
Sulfur dioxide	All	22 parts per million by volume dry basis or 75 percent reduction by weight or volume (daily 24-hr geometric average).
Nitrogen oxide ^b	Mass burn waterwall	205 parts per million by volume dry basis (daily 24-hr arithmetic average).
	Mass burn rotary	150 parts per million by volume dry basis (daily 24-hr arithmetic average).
	Refuse-derived fuel stoker	160 parts per million by volume dry basis (daily 24-hr arithmetic average).
	Refuse-derived fuel spreader stoker and semi-suspension	160 parts per million by volume dry basis (daily 24-hr arithmetic average).
	Refuse-derived fuel fluidized bed	180 parts per million by volume dry basis (daily 24-hr arithmetic average).
Hydrogen chloride	All	10 parts per million by volume dry basis or 96 percent reduction by weight or volume.
Dioxins/furans	All	14 nanograms per dry standard cubic meter (total mass).

^a CEMS data during warmup, startup, and shutdown, as defined in this subpart, are not corrected to 7 percent oxygen and are used as measured.

^b Existing mass burn waterwall units equipped with air-to-air heat exchanger flue gas reheat in advance of a selective catalytic reduction control device are subject to a 50 parts per million by volume dry basis emission limit.

authority: 42 U.S.C. 7401

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