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Table HH-1 to Subpart HH of Part 98 – Emissions Factors, Oxidation Factors and Methods
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.
Factor Default value Units
DOC and k values-Bulk waste option
DOC (bulk waste) 0.20 Weight fraction, wet basis
k (precipitation plus recirculated leachatea <20 inches/year) 0.02 yr-1
k (precipitation plus recirculated leachatea 20-40 inches/year) 0.038 yr-1
k (precipitation plus recirculated leachatea >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 0.057b yr-1
k (inerts, e.g., glass, plastics, metal, concrete) 0.00 yr-1
k (C&D waste) 0.02 to 0.04b 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 0.185c yr-1
k (garden) 0.05 to 0.10c yr-1
k (paper) 0.04 to 0.06c yr-1
k (wood and straw) 0.02 to 0.03c yr-1
k (textiles) 0.04 to 0.06c yr-1
k (diapers) 0.05 to 0.10c yr-1
k (sewage sludge) 0.06 to 0.185c 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.

[74 FR 56479, Oct. 30, 2009; 75 FR 66473, Oct. 28, 2010; 78 FR 71970, Nov. 29, 2013]

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