Industrial Waste Landfills
Subpart TT, Greenhouse Gas Reporting Program
United Stalss
Environmental Protection
Under the Greenhouse Gas Reporting Program (GHGRP), owners or operators of facilities that contain
industrial waste landfills (as defined below) and that emit 25,000 metric tons or more of greenhouse
gases (GHGs) per year (expressed as carbon dioxide equivalents) from the industrial waste landfill
stationary combustion, miscellaneous use of carbonates, and other source categories (see information
sheet on General Provisions) must report emissions from industrial waste landfills and all other source
categories located at the facility for which methods are defined in the rule. Owners and operators are
required to collect emission data, calculate greenhouse gas (GHG) emissions, and follow the specified
procedures for quality assurance, missing data, recordkeeping, and reporting per the requirements of 40
CFR Part 98 Subpart TT - Industrial Waste Landfills.
How Is This Source Category Defined?
An industrial waste landfill is any landfill other than a municipal solid waste landfill, a RCRA Subtitle C
hazardous waste landfill, or a TSCA hazardous waste landfill, in which industrial solid waste, such as
RCRA Subtitle D wastes (non-hazardous industrial solid waste, defined in 40 CFR 257.2), commercial
solid wastes, or conditionally exempt small quantity generator wastes, is placed. An industrial waste
landfill includes all disposal areas at the facility.
This source category consists of industrial waste landfills that accepted waste on or after January 1, 1980,
and that are located at a facility whose total landfill design capacity is greater than or equal to 300,000
metric tons. It includes the landfill, any landfill gas collection systems at the landfill, and destruction
devices for landfill gases (including flares).
An industrial waste landfill is not subject to the rule if it is a dedicated construction and demolition waste
landfill, or a landfill that receives only inert waste materials (as defined in the subpart) such as coal
combustion residue (e.g., fly ash), cement kiln dust, rocks and/or soil from excavation and construction
and similar activities, glass, non-chemically bound sand (e.g., green foundry sand), clay, gypsum, pottery
cull, bricks, mortar, cement, furnace slag, refractory material, or plastics.
What Greenhouse Gases Must Be Reported?
Industrial waste landfill owners and operators must report:
	Annual CH4 generation and CH4 emissions from the landfill.
	Annual CH4 destruction (for landfills with gas collection and control systems).
	Annual CO2, CH4, and N2O emissions from stationary combustion devices using the calculation
methods specified in 40 CFR Part 98 Subpart C (General Stationary Combustion Sources). The
information sheet on general stationary combustion sources summarizes calculating and reporting
emissions form these units.
In addition, each facility must report GHG emissions for any other source categories for which calculation
methods are provided in other subparts of the rule, as applicable.
How Must Greenhouse Gas Emissions Be Calculated?
Industrial waste landfills must calculate modeled annual CH4 generation based on:
	Measured or estimated values of historic annual waste disposal quantities; and
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	Appropriate values for model inputs (i.e., degradable organic carbon fraction in the waste, CH4
generation rate constant). Default parameter values are specified for certain industries and for
industrial waste generically.
Landfills that do not collect and destroy landfill gas must adjust the modeled annual CH4 generation to
account for soil oxidation (CH4 that is converted to CO2 as it passes through the landfill cover before
being emitted) using a default soil oxidation factor. The resulting value must be reported and represents
both CH4 generation and CH4 emissions.
Industrial Waste Landfill facilities that collect and control landfill gas will use the same calculations
specified in subpart HH - Municipal Solid Waste (MSW) Landfills for monitoring, calculation, and
reporting requirements related to CH4 recovery, destruction, and emissions. See the subpart HH
Information Sheet for further details.
A checklist for data that must be monitored is available at:
What Information Must Be Reported?
In addition to the information required by the General Provisions at 40 CFR 98.3(c), each facility must
report the following landfill information:
	General information about the landfill, including whether the landfill is "open" or "closed," the
year in which the landfill first started accepting waste for disposal, the last year the landfill
accepted waste or the projected year of landfill closure, the capacity of the landfill, and an
indication of whether leachate recirculation is used at the landfill.
	Waste characterization information, such as the number of waste streams accepted at the landfill
and a description of each waste stream.
	Waste stream-specific information, such as the decay rate (k) value used in the calculations, the
method(s) for estimating historical waste disposal quantities, and the range of years for which
each method applies. When historical disposal rates are estimated based on production or filled
capacity, the production or filled capacity parameters needed to estimate the historical disposal
rates must also be reported.
	Historic and current annual landfill operating information, such as the quantity of waste disposed
of in the landfill for each waste stream type for each year, the degradable organic carbon content
value for each waste stream or waste stream type for each year, an indication as to whether this
was the default value, a measured value using a 60-day anaerobic biodegradation test, or a value
based on total and volatile solids measurements, and if the DOC value was determined using a
60-day anaerobic biodegradation test, which test was used.
	The fraction of CH4 in the landfill gas for the reporting year and an indication as to whether this
was the default value or a value determined through measurement data.
	Description of the landfill cover, such as the type(s) of cover material used, and the landfill
surface area at the start of the reporting year associated with each cover type.
	Modeled annual CH4 generation rate for the reporting year.
	Annual CH4 emissions (which is CH4 generation adjusted for oxidation for landfills without gas
collection systems) and an indication of whether passive vents and/or passive flares are present at
the landfill.
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Industrial waste landfills with gas collection systems must report the same additional information as
required by MSW landfills with landfill gas collection. See the subpart HH information sheet for further
details on the reporting requirements.
Facilities must enter required data into the electronic Greenhouse Gas Reporting Tool (e-GGRT) to be
reported in the annual report, and must also enter into e-GGRT" s Inputs Verifier Tool (IVT) the inputs to
emission equations for which reporting is not required. IVT uses these entered data to calculate the
equation results.
When and How Must Reports Be Submitted?
Annual reports must be submitted by March 31 of each year, unless the 31st is a Saturday, Sunday, or
federal holiday, in which case the reports are due on the next business day. Annual reports must be
submitted electronically using e-GGRT. the GHGRP's online reporting system. Additional information
on setting up user accounts, registering a facility and submitting annual reports is available at
https ://ccdsupport. com/ confluence/.
When Can a Facility Stop Reporting?
There are several scenarios under which a facility may discontinue reporting. These scenarios are
summarized in the Subpart A Information Sheet as well as in an FAQ.
For More Information
For additional information on Subpart TT, visit the Subpart TT Resources webpage. For additional
information on the Greenhouse Gas Reporting Program, visit the Greenhouse Gas Reporting Program
Website, which includes information sheets on other rule subparts, data previously reported to the
Greenhouse Gas Reporting Program, training materials, and links to frequently asked questions.
This document is provided solely for informational purposes. It does not provide legal advice, have
legally binding effect, or expressly or implicitly create, expand, or limit any legal rights, obligations,
responsibilities, expectations, or benefits in regard to any person. The series of information sheets is
intended to assist reporting facilities/owners in understanding key provisions of the Greenhouse Gas
Reporting Program.
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