Code of Federal Regulations > Title 40 > Chapter I > Part 98 > Subpart HH > Appendix - Table HH-1 to Subpart HH of Part 98—Emissions Factors, Oxidation Factors and Methods

Regulations last checked for updates: Nov 25, 2024

Title 40 - Protection of Environment last revised: Nov 21, 2024

Appendix - Table HH-1 to Subpart HH of Part 98—Emissions Factors, Oxidation Factors and Methods

Link to an amendment published at 89 FR 31940, Apr. 25, 2024.

Factor	Default value	Units
DOC and k values—Bulk waste option
DOC (bulk waste)	0.20	Weight fraction, wet basis.
k (precipitation plus recirculated leachate ^a <20 inches/year)	0.02	yr −1
k (precipitation plus recirculated leachate ^a 20-40 inches/year)	0.038	yr −1
k (precipitation plus recirculated leachate ^a >40 inches/year)	0.057	yr −1
DOC and k values—Modified bulk MSW option
DOC (bulk MSW, excluding inerts and C&D waste)	0.31	Weight fraction, wet basis.
DOC (inerts, e.g., glass, plastics, metal, concrete)	0.00	Weight fraction, wet basis.
DOC (C&D waste)	0.08	Weight fraction, wet basis.
k (bulk MSW, excluding inerts and C&D waste)	0.02 to 0.057 ^b	yr −1
k (inerts, e.g., glass, plastics, metal, concrete)	0.00	yr −1
k (C&D waste)	0.02 to 0.04 ^b	yr −1
DOC and k values—Waste composition option
DOC (food waste)	0.15	Weight fraction, wet basis.
DOC (garden)	0.2	Weight fraction, wet basis.
DOC (paper)	0.4	Weight fraction, wet basis.
DOC (wood and straw)	0.43	Weight fraction, wet basis.
DOC (textiles)	0.24	Weight fraction, wet basis.
DOC (diapers)	0.24	Weight fraction, wet basis.
DOC (sewage sludge)	0.05	Weight fraction, wet basis.
DOC (inerts, e.g., glass, plastics, metal, cement)	0.00	Weight fraction, wet basis.
k (food waste)	0.06 to 0.185 ^c	yr −1
k (garden)	0.05 to 0.10 ^c	yr −1
k (paper)	0.04 to 0.06 ^c	yr −1
k (wood and straw)	0.02 to 0.03 ^c	yr −1
k (textiles)	0.04 to 0.06 ^c	yr −1
k (diapers)	0.05 to 0.10 ^c	yr −1
k (sewage sludge)	0.06 to 0.185 ^c	yr −1
k (inerts e.g., glass, plastics, metal, concrete)	0.00	yr −1
Other parameters—All MSW landfills
MCF	1.
DOCF	0.5
F	0.5
OX	See Table HH-4 of this subpart
DE	0.99

^a Recirculated leachate (in inches/year) is the total volume of leachate recirculated from company records or engineering estimates divided by the area of the portion of the landfill containing waste with appropriate unit conversions. Alternatively, landfills that use leachate recirculation can elect to use the k value of 0.057 rather than calculating the recirculated leachate rate.

^b Use the lesser value when precipitation plus recirculated leachate is less than 20 inches/year. Use the greater value when precipitation plus recirculated leachate is greater than 40 inches/year. Use the average of the range of values when precipitation plus recirculated leachate is 20 to 40 inches/year (inclusive). Alternatively, landfills that use leachate recirculation can elect to use the greater value rather than calculating the recirculated leachate rate.

^c Use the lesser value when the potential evapotranspiration rate exceeds the mean annual precipitation rate plus recirculated leachate. Use the greater value when the potential evapotranspiration rate does not exceed the mean annual precipitation rate plus recirculated leachate. Alternatively, landfills that use leachate recirculation can elect to use the greater value rather than assessing the potential evapotranspiration rate or recirculated leachate rate.

[75 FR 66473, Oct. 28, 2010, as amended at 78 FR 71970, Nov. 29, 2013]

authority: 42 U.S.C. 7401-7671q.

source: 74 FR 56374, Oct. 30, 2009, unless otherwise noted.