Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 220 - NONMETHANE ORGANIC COMPOUNDS
Subpart B - MSW LANDFILLS
Section 220.260 - Test Methods and Procedures
Current through Register Vol. 48, No. 38, September 20, 2024
a) The landfill owner or operator shall calculate the NMOC emission rate using the equation provided in either subsection (a)(1)(A) or subsection (a)(1)(B) of this Section and make a determination that the emission rate is less than 50 Mg/yr, pursuant to subsection (a)(2), (a)(3), (a)(4), or (e), or install a gas collection and control system pursuant to Sections 220.220 and 220.230 of this Subpart. However, both equations may be used if the actual year-to-year solid waste acceptance rate is known pursuant to subsection (a)(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, pursuant to subsection (a)(1)(B) of this Section, for part of the life of the landfill. If the NMOC emission rate calculated in this subsection is less than 50 Mg/yr, then the landfill owner shall submit an emission rate report as provided in Section 220.280(b) of this Subpart, and shall recalculate the NMOC mass emission rate as required under Section 220.210(c) of this Subpart.
|
MNMOC |
= |
n |
2kLo Mi(e-kti)(CNNMOC)(3.6 x10-9) |
|
[SIGMA] |
|||
|
i=1 |
where:
|
MNMOC |
= |
Total NMOC emission rate from the landfill, Mg/yr |
|
k |
= |
methane generation rate constant, yr-1 |
|
Lo |
= |
methane generation potential, m3 per Mg solid waste |
|
Mi |
= |
mass of solid waste in the ith section, Mg |
|
ti |
= |
age of solid waste in the ith section, years |
|
CNMOC |
= |
concentration of NMOC, ppmv 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 amount of such wastes is maintained.
MNMOC = 2LoR(e-kc - e(-kt))(CNMOC)(3.6 x 10-9)
where:
|
MNMOC |
= |
Total NMOC emission rate from the landfill, Mg/yr |
|
Lo |
= |
methane generation potential, m3 per Mg solid waste |
|
R |
= |
average annual acceptance rate, Mg/yr |
|
k |
= |
methane generation rate constant, year-1 |
|
t |
= |
age of landfill, years |
|
CNMOC |
= |
concentration of NMOC, ppmv as hexane conversion factor |
|
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 average annual acceptance rate when calculating a value for R, if documentation of the nature and amount of such wastes is maintained.
b) After the installation of a collection and control system in compliance with Sections 220.220 and 220.230 of this Subpart, the owner or operator shall calculate the NMOC emission rate for purposes of determining when the system can be removed as provided in Section 220.250(h) of this Subpart, using the following equation:
MNMOC = 1.89 x 10-3 QLFG CNMOC
where:
|
MNMOC |
= |
mass emission rate of NMOC (Mg/yr) |
|
QLFG |
= |
flow rate of landfill gas (m3/minute) |
|
CNMOC |
= |
NMOC concentration (ppmv as hexane) |
c) If the gas collection system complies with the provisions in Section 220.220 of this Subpart and is already installed, the owner or operator shall estimate the NMOC emission rate using the procedures provided in subsection (b) of this Section. For areas of the landfill where the owner or operator has not been required to install a well yet, he/she may select an appropriate method from subsection (a) of this Section to estimate emissions.
d) For the performance test required in Section 220.210(d)(2) of this Subpart, Method 25C or Method 18, Appendix A, 40 CFR 60, incorporated by reference in Section 220.130 of this Part, shall be used to determine compliance with 98 weight-percent efficiency or the 20 ppmv outlet concentration level, unless another method to demonstrate compliance has been approved by the Agency as provided by Section 220.230(d) of this Subpart. If using Method 18, the minimum list of compounds to be tested shall be those published in the Compilation of Air Pollutant Emission Factors (AP-42), incorporated by reference in Section 220.130 of this Part. The following equation shall be used to calculate efficiency:
Control efficiency = (NMOCin - NMOCout)/(NMOCin)
where:
|
NMOCin |
= |
mass of NMOC entering control device |
|
NMOCout |
= |
mass of NMOC exiting control device |
e) The owner or operator may use other methods to determine the NMOC concentration, site-specific k, or landfill gas flow rate, as an alternate to the methods required in subsection (a)(3) and (a)(4) of this Section, if the method has been approved by the Agency, as provided for in Section 220.220(d) or Section 220.230(d) of this Subpart.
f) The owner or operator may use the procedures described in AP-42, Compilation of Air Pollutant Emission Factors, incorporated by reference in Section 220.130 of this Part, to estimate emissions pursuant to the annual emission report required in 35 Ill. Adm. Code 210.302(a). The most recent values for k, Lo, and NMOC concentration reported in AP-42 shall be used to calculate emissions. To determine applicability of or compliance with the requirements of this Part, the owner or operator must use the tiered emission estimates provided in subsections (a)(1) through (a)(4) of this Section.
g) Testing:
