Virginia Administrative Code › Title 9 - ENVIRONMENT › Agency 5 - STATE AIR POLLUTION CONTROL BOARD › Chapter 40 - EXISTING STATIONARY SOURCES › Part II - Emission Standards › Article 43 - Emission Standards for Municipal Solid Waste Landfills (Rule 4-43) › Section 9VAC5-40-5860 - Test methods and procedures

Current through Register Vol. 40, No. 24, July 15, 2024
A. The provisions of 9VAC5-40-30 (Emission
					 testing) or 40 CFR
					 60.8, whichever is more restrictive,
					 apply.
B.
1. The owner shall calculate the NMOC
					 emission rate using either the equation provided in subdivision B 1 a of this
					 section or the equation provided in subdivision B 1 b of this section. Both
					 equations may be used if the actual year-to-year solid waste acceptance rate is
					 known, as specified in subdivision B 1 a of this section, for part of the life
					 of the landfill and the actual year-to-year solid waste acceptance rate is
					 unknown, as specified in subdivision B 1 b of this section, for part of the
					 life of the landfill. The values to be used in both equations are 0.05 per year
					 for k, 170 cubic meters per megagram for L0, and 4,000
					 parts per million by volume as hexane for the CNMOC. For
					 landfills located in geographical areas with a 30-year average annual
					 precipitation of less than 25 inches, as measured at the nearest representative
					 official meteorological site, the k value to be used is 0.02 per year.
a. The following equation shall be used if
					 the actual year-to-year solid waste acceptance rate is known.
MNMOC =
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						Image
2kL0Mi
						(e-kti) (CNMOC)
						(3.6 X 10-9)
where
MNMOC = Total NMOC emission rate
						from the landfill, megagrams per year
k = methane generation rate constant,
						year-1
L0 = methane generation potential,
						cubic meters per megagram solid waste
Mi = mass of solid waste in the
						ith section, megagrams
ti = age of the
						ith section, years
CNMOC = concentration of NMOC,
						parts per million by volume as hexane
3.6 X 10-9 = conversion
						factor
The mass of nondegradable solid waste may be subtracted
						from the total mass of solid waste in a particular section of the landfill when
						calculating the value for Mi if documentation of the
						nature and amounts of such wastes is obtained.
b. The following equation shall be used if
					 the actual year-to-year solid waste acceptance rate is unknown.
MNMOC = 2L0
						R(e-kc
						-e-kt)(CNMOC)(3.6 X
						10-9)
where
MNMOC = mass emission rate of
						NMOC, megagrams per year
L0 = methane generation potential,
						cubic meters per megagram solid waste
R = average annual acceptance rate, megagrams per
						year
k = methane generation rate constant,
						year-1
t = age of landfill, years
CNMOC = concentration of NMOC,
						parts per million by volume as hexane
c = time since closure, years. For active landfill c = 0
						and e-kc = 1
3.6 X 10-9 = conversion
						factor
The mass of nondegradable solid waste may be subtracted
						from the total mass of solid waste in a particular section of the landfill when
						calculating the value of R if documentation of the nature and amounts of such
						waste is maintained.