California Code of Regulations › Title 17 - Public Health › Division 3 - Air Resources › Chapter 1 - Air Resources Board › Subchapter 10 - Climate Change › Article 4 - Regulations to Achieve Greenhouse Gas Emission Reductions › Subarticle 6 - Methane Emissions from Municipal Solid Waste Landfills › Appendix I - Severability

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
1.0 Calculate Heat Input
						  Capacity
Heat Input Capacity (MMBtu/hr) = Methane Gas Generation
						  (scfm) x 60 minutes/1 hour x Collection Efficiency x GHV x 1 MMBtu/1,000,000
						  Btu
Where:
Collection Efficiency = the landfill gas collection
						  efficiency in percent (%), which is 75 percent.
GHV (Gross Heating Value) = Gross heating value of
						  methane, which is 1,012 in units of British thermal units per standard cubic
						  feet, or Btu/scf; source:
http://epa.gov/lmop/res/converter.htm
).
2.0 Methane Gas
						  Generation:
CH4 Generation is calculated
						  using the following equation:
CH4 Generation (Mg of
						  CH4) = {ANDOCyear-start x
						  [1-e-[k]] - ANDOCdeposited-last year x [1/k x
						  (e-[k x (1-M/12)] -
						  e-[k]) - (M/12) x e-[k]]
						  + ANDOCdeposited-same year x [1-((1/k) x
						  (1-e-[k x (1-M/12)] + (M/12))]} x
						  FCH4
Where:
CH4 Generation =
						  CH4 generated in the inventory year in question (Mg of
						  CH4) using the Mathematically Exact First-Order Decay
						  Model provided in the 2006 Intergovernmental Panel on Climate Change (IPCC)
						  Guidelines for National Greenhouse Gas Inventories, Chapter 3 (Source:
http://www.ipcc-nggip.iges.or.jp/public/2006gl/pdf/5_Volume5/V5_3_Ch3_SWDS.pdf
).
FCH4 = Fraction of decomposing
						  carbon converted into CH4 (Default = 0.5)
ANDOCyear-start = ANDOC in place
						  at the beginning of the inventory year in question
ANDOCdeposited-last year = ANDOC
						  deposited during the previous inventory year
ANDOCdeposited-same year = ANDOC
						  deposited during the inventory year in question
3.0 To Convert Methane Generated from Mg
						  of CH4 to SCFM
CH4 Gas Generated (scfm)
						  = CH4 Generation (Mg/year) x 1 year/ 525,600 minutes x
						  1,000,000 g/Mg x 1 mole CH4/16.04246 g
						  CH4 x 0.83662 SCF/mole landfill gas
4.0 Define ANDOC%
ANDOC% = [SUMMATION]
						  WIPFRACi x TDOCi x
						  DANFi
Where:
WIPFRACi = Fraction of the
						  ith component in the waste-in-place
TDOCi = Total Degradable Organic Carbon fraction of the
						  ith waste component (Mg of that component/Mg of Total waste-in-place
DANFi =Decomposable Anaerobic Fraction of the ith waste
						  component, that fraction capable of decomposition in anaerobic conditions (Mg
						  of decomposable carbon for that component/Mg TDOCi for that component)
5.0 Define ANDOC
ANDOC = WIP (Tons) x 0.9072 (Mg/Ton) x
						  ANDOC%
Where:
ANDOC = Anaerobically Degradable Organic Carbon, carbon
						  that is capable of decomposition in an anaerobic environment (Mg of
						  carbon)
WIP = Waste-in-Place estimate of all the landfilled
						  waste (wet weight) as reported to the CIWMB (tons)
6.0 Calculate
						  ANDOCyear-end
ANDOCyear-end =
						  ANDOCyear-start x e-[k]
						  +
ANDOCdeposited-last year
						  x [1/k x (e-[k x (1-M/12)] -
						  e-[k]) - (M/12) x e-[k]]
						  + ANDOCdeposited-same year x [(1/k) x
						  (1-e-[k x (1-M/12)] + (M/12)]
Where:
ANDOCyear-end = ANDOC remaining
						  undecomposed at the end of the inventory year in question
ANDOCyear-start = ANDOC in place
						  at the beginning of the inventory year in question
ANDOCdeposited-last year = ANDOC
						  deposited during the previous inventory year
ANDOCdeposited-same year = ANDOC
						  deposited during the inventory year in question
M = Assumed delay before newly deposited waste begins
						  to undergo anaerobic decomposition (Months, Default = 6)
k = Assumed rate constant for anaerobic decomposition;
						  k = ln2/half-life (years); half-life is the number of years required for half
						  of the original mass of carbon to degrade
The following values for the assumed rate constant for
						  anaerobic decomposition (or "k") must be used:
Table 1. Average Rainfall and k
						  Values
Average Rainfall
									 (Inches/Year)
k
									 Value
<20
0.020
20-40
0.038
>40
0.057
Source: U.S. EPA
http//
www.ncgc.nrcs.usda.gov/products/datasets/climate/data/precipitation-state/
.
The following waste characterization default values
						  shown in Tables 1A, 1B, 2, and 3 in addition to the model equations must be
						  used in estimating the methane generation potential for a MSW landfill:
Table 1A
Waste Type (%) by
									 Year
Waste
									 Type
Up to
									 1964
1965-1974
1975-1984
1985-1992
1993-1995
Newspaper
6.4%
6.4%
5.9%
4.8%
3.9%
Office
								  Paper
10.7%
11.3%
12.0%
13.1%
15.0%
Corrugated
								  Boxes
10.8%
13.5%
11.5%
10.5%
10.3%
Coated
								  Paper
2.2%
2.0%
2.4%
2.1%
1.8%
Food
14.8%
11.3%
9.5%
12.1%
13.4%
Grass
12.1%
10.3%
10.1%
9.0%
6.6%
Leaves
6.1%
5.1%
5.0%
4.5%
3.3%
Branches
6.1%
5.1%
5.0%
4.5%
3.3%
Lumber
3.7%
3.3%
5.1%
7.0%
7.3%
Textiles
2.1%
1.8%
1.7%
3.3%
4.5%
Diapers
0.1%
0.3%
1.4%
1.6%
1.9%
Construction/Demolition
2.6%
2.5%
3.5%
3.9%
4.5%
Medical
								  Waste
0.0%
0.0%
0.0%
0.0%
0.0%
Sludge/Manure
0.0%
0.0%
0.0%
0.0%
0.0%
Source: US EPA Municipal Solid Waste
								  publication: http://www.epa.gov/msw/pubs/03data.pdf.
Table 1B
Waste Type (%) by
									 Year
Waste
								  Type
1996-2002
1
2003-present
2
Newspaper
4.3%
2.2%
Office Paper
4.4%
2.0%
Corrugated Boxes
4.6%
5.7%
Coated Paper
16.9%
11.1%
Food
15.7%
14.6%
Grass
5.3%
2.8%
Leaves
2.6%
1.4%
Branches
2.4%
2.6%
Lumber
4.9%
9.6%
Textiles
2.1%
4.4%
Diapers
6.9%
4.4%
Construction/Demolition
6.7%
12.1%
Medical Waste
0.0%
0.0%
Sludge/Manure
0.1%
0.1%
Source:
1 CIWMB Statewide Waste Characterization Study
						  (1999).
2 CIWMB Statewide Waste Characterization Study
						  (2004).
Table 2
Waste
								  Type
TDOC
Source
Newspaper
46.5%
EPA
Office Paper
39.8%
EPA
Corrugated Boxes
40.5%
EPA
Coated Paper
40.5%
EPA
Food
11.7%
EPA
Grass
19.2%
EPA
Leaves
47.8%
EPA
Branches
27.9%
EPA
Lumber
43.0%
IPCC
Textiles
24.0%
IPCC
Diapers
24.0%
IPCC
Construction/Demolition
4.0%
IPCC
Medical Waste
15.0%
IPCC
Sludge/Manure
5.0%
IPCC
Sources
EPA
Solid Waste Management and Greenhouse
						  Gasses: A Life-Cycle Assessment of Emissions and Sinks,
Exhibits 7-2,
						  7-3 (May 2002).
IPCC
Guidelines for National Greenhouse Gas
						  Inventories,
Chapter 2, Table 2.4, 2.5 and 2.6 (2006).
Table 3
Waste
								  Type
DANF
Source
Newspaper
16.1%
EPA
Office Paper
87.4%
EPA
Corrugated Boxes
38.3%
EPA
Coated Paper
21.0%
EPA
Food
82.8%
EPA
Grass
32.2%
EPA
Leaves
10.0%
EPA
Branches
17.6%
EPA
Lumber
23.3%
CEC
Textiles
50.0%
IPCC
Diapers
50.0%
IPCC
Construction/Demolition
50.0%
IPCC
Medical Waste
50.0%
IPCC
Sludge/Manure
50.0%
IPCC
Sources:
EPA
Solid Waste Management and Greenhouse
						  Gasses: A Life-Cycle Assessment of Emissions and Sinks
Exhibits 7-2,
						  7-3 (May 2002).
CEC
Inventory of California Greenhouse Gas
						  Emissions and Sinks: 1990-2004
(December 2006).
IPCC
Guidelines for National Greenhouse Gas
						  Inventories,
Chapter 3, 3.13 (2006).
1. New
						  Appendix I filed 6-17-2010; operative 6-17-2010 pursuant to Government Code
						  section
						  11343.4
						  (Register 2010, No. 25).