10. Section 60.767 is amended by revising paragraphs (g) introductory
text, (g)(7, and (j) introductory text and adding paragraph (m) to read
as follows:

Sec.  60.767  Reporting requirements.

* * * * *
    (g) Annual report. The owner or operator of a landfill seeking to
comply with Sec.  60.762(b)(2) using an active collection system
designed in accordance with Sec.  60.762(b)(2)(ii) must submit to the
Administrator, following the procedure specified in paragraph (i)(2) of
this section, annual reports of the recorded information in paragraphs
(g)(1) through (7) of this section. The initial annual report must be
submitted within 180 days of installation and startup of the collection
and control system and must include the initial performance test report
required under Sec.  60.8, as applicable, unless the report of the
results of the performance test has been submitted to the EPA via the
EPA's CDX. In the initial annual report, the process unit(s) tested,
the pollutant(s) tested, and the date that such performance test was
conducted may be submitted in lieu of the performance test report if
the report has been previously submitted to the EPA's CDX. For enclosed
combustion devices and flares, reportable exceedances are defined under
Sec.  60.768(c). If complying with the operational provisions of
Sec. Sec.  63.1958, 63.1960, and 63.1961 of this chapter, as allowed at
Sec.  60.762(b)(2)(iv), the owner or operator must follow the semi-
annual reporting requirements in Sec.  63.1981(h) of this chapter in
lieu of this paragraph.
* * * * *
    (7) For any corrective action analysis for which corrective actions
are required in Sec.  60.765(a)(3) or (5) and that take more than 60
days to correct the exceedance, the root cause analysis conducted,
including a description of the recommended corrective action(s), the
date for corrective action(s) already completed following the positive
pressure or elevated temperature reading, and, for action(s) not
already completed, a schedule for implementation, including proposed
commencement and completion dates.
* * * * *
    (j) Corrective action and the corresponding timeline. The owner or
operator must submit according to paragraphs (j)(1) and (2) of this
section. If complying with the operational provisions of Sec. Sec.
63.1958, 63.1960, and 63.1961 of this chapter, as allowed at Sec.
60.762(b)(2)(iv), the owner or operator must follow the corrective
action and the corresponding timeline requirements in Sec.  63.1981(j)
of this chapter in lieu of this paragraph.
* * * * *
    (m) Each owner or operator that chooses to comply with the
provisions in Sec. Sec.  63.1958, 63.1960, and 63.1961, as allowed at
Sec.  60.762(b)(2)(iv), must submit the 24-hour high temperature report
according to Sec.  63.1981(k) of this chapter.

0
11. Section 60.768 is amended by revising paragraph (e) introductory
text and adding paragraph (e)(6) to read as follows:

Sec.  60.768  Recordkeeping requirements.

* * * * *
    (e) Except as provided in Sec.  60.767(c)(2), each owner or
operator subject to the provisions of this subpart must keep for at
least 5 years up-to-date, readily accessible records of the items in
paragraphs (e)(1) through (5) of this section. Each owner or operator
that chooses to comply with the provisions in Sec. Sec.  63.1958,
63.1960, and 63.1961 of this chapter, as allowed at Sec.
60.762(b)(2)(iv), must keep the records in paragraph (e)(6) of this
section and must keep records according to Sec. Sec.  63.1983(e)(1)
through (5) of this chapter in lieu of paragraphs (e)(1) through (5) of
this section.
* * * * *
    (6) Each owner or operator that chooses to comply with the
provisions in Sec. Sec.  63.1958, 63.1960, and 63.1961 of this chapter,
as allowed at Sec.  60.762(b)(2)(iv), must keep records of the date
upon which the owner or operator started complying with the provisions
in Sec. Sec.  63.1958, 63.1960, and 63.1961.
* * * * *

PART 63--NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS
FOR SOURCE CATEGORIES

0
12. The authority citation for part 63 continues to read as follows:

    Authority:  42 U.S.C. 7401 et seq.

0
13. Section 63.14 is amended by revising paragraph (h)(94) to read as
follows:

Sec.  63.14  Incorporations by reference.

* * * * *
    (h) * * *
    (94) ASTM D6522-11 Standard Test Method for Determination of
Nitrogen Oxides, Carbon Monoxide, and Oxygen Concentrations in
Emissions from Natural Gas-Fired Reciprocating Engines, Combustion
Turbines, Boilers, and Process Heaters Using Portable Analyzers,
Approved December 1, 2011, IBR approved for Sec.  63.1961(a) and table
3 to subpart YYYY.
* * * * *

0
14. Subpart AAAA is revised to read as follows:

Subpart AAAA--National Emission Standards for Hazardous Air Pollutants:
Municipal Solid Waste Landfills

What This Subpart Covers

Sec.
63.1930 What is the purpose of this subpart?
63.1935 Am I subject to this subpart?
63.1940 What is the affected source of this subpart?
63.1945 When do I have to comply with this subpart?
63.1947 When do I have to comply with this subpart if I own or
operate a bioreactor?
63.1950 When am I no longer required to comply with this subpart?
63.1952 When am I no longer required to comply with the requirements
of this subpart if I own or operate a bioreactor?

Standards

63.1955 What requirements must I meet?
63.1957 Requirements for gas collection and control system
installation and removal
63.1958 Operational standards for collection and control systems
63.1959 NMOC calculation procedures
63.1960 Compliance provisions
63.1961 Monitoring of operations
63.1962 Specifications for active collection systems

General and Continuing Compliance Requirements

63.1964 How is compliance determined?
63.1965 What is a deviation?
63.1975 How do I calculate the 3-hour block average used to
demonstrate compliance?

Notifications, Records, and Reports

63.1981 What reports must I submit?
63.1982 What records and reports must I submit and keep for
bioreactors or liquids addition other than leachate?
63.1983 What records must I keep?

Other Requirements and Information

63.1985 Who enforces this subpart?
63.1990 What definitions apply to this subpart?

Table 1 to Subpart AAAA of Part 63--Applicability of NESHAP General
Provisions to Subpart AAAA

Subpart AAAA--National Emission Standards for Hazardous Air
Pollutants: Municipal Solid Waste Landfills

What This Subpart Covers

Sec.  63.1930  What is the purpose of this subpart?

    This subpart establishes national emission standards for hazardous
air pollutants for existing and new municipal solid waste (MSW)
landfills.
    (a) Before September 28, 2021, all landfills described in Sec.
63.1935 must meet the requirements of 40 CFR part 60, subpart WWW, or
an approved state or federal plan that implements 40 CFR part 60,
subpart Cc, and requires timely control of bioreactors and additional
reporting requirements. Landfills must also meet the startup, shutdown,
and malfunction (SSM) requirements of the general provisions as
specified in Table 1 to Subpart AAAA of this part and must demonstrate
compliance with the operating conditions by parameter monitoring
results that are within the specified ranges. Specifically, landfills
must meet the following requirements of this subpart that apply before
September 28, 2021, as set out in: Sec. Sec.  63.1955(a), 63.1955(b),
63.1965(a), 63.1965(c), 63.1975, 63.1981(a), 63.1981(b), and 63.1982,
and the definitions of ``Controlled landfill'' and ``Deviation'' in
Sec.  63.1990.
    (b) Beginning no later than September 27, 2021, all landfills
described in Sec.  63.1935 must meet the requirements of this subpart.
A landfill may choose to meet the requirements of this subpart rather
than the requirements identified in Sec.  63.1930(a) at any time before
September 27, 2021. The requirements of this subpart apply at all
times, including during periods of SSM, and the SSM requirements of the
General Provisions of this part do not apply.

Sec.  63.1935  Am I subject to this subpart?

    You are subject to this subpart if you meet the criteria in
paragraph (a) or (b) of this section.
    (a) You are subject to this subpart if you own or operate an MSW
landfill that has accepted waste since November 8, 1987, or has
additional capacity for waste deposition and meets any one of the three
criteria in paragraphs (a)(1) through (3) of this section:
    (1) Your MSW landfill is a major source as defined in Sec.  63.2 of
subpart A.
    (2) Your MSW landfill is collocated with a major source as defined
in Sec.  63.2 of subpart A.
    (3) Your MSW landfill is an area source landfill that has a design
capacity equal to or greater than 2.5 million megagrams (Mg) and 2.5
million cubic meters (m\3\) and has estimated uncontrolled emissions
equal to or greater than 50 megagrams per year (Mg/yr) NMOC as
calculated according to Sec.  63.1959.
    (b) You are subject to this subpart if you own or operate an MSW
landfill that has accepted waste since November 8, 1987, or has
additional capacity for waste deposition, that includes a bioreactor,
as defined in Sec.  63.1990, and that meets any one of the criteria in
paragraphs (b)(1) through (3) of this section:
    (1) Your MSW landfill is a major source as defined in Sec.  63.2 of
subpart A.
    (2) Your MSW landfill is collocated with a major source as defined
in Sec.  63.2 of subpart A.
    (3) Your MSW landfill is an area source landfill that has a design
capacity equal to or greater than 2.5 million Mg and 2.5 million m\3\
and that is not permanently closed as of January 16, 2003.

Sec.  63.1940  What is the affected source of this subpart?

    (a) An affected source of this subpart is an MSW landfill, as
defined in Sec.  63.1990, that meets the criteria in Sec.  63.1935(a)
or (b). The affected source includes the entire disposal facility in a
contiguous geographic space where household waste is placed in or on
land, including any portion of the MSW landfill operated as a
bioreactor.
    (b) A new affected source of this subpart is an affected source
that commenced construction or reconstruction after November 7, 2000.
An affected source is reconstructed if it meets the definition of
reconstruction in Sec.  63.2 of subpart A.
    (c) An affected source of this subpart is existing if it is not
new.

Sec.  63.1945  When do I have to comply with this subpart?

    (a) If your landfill is a new affected source, you must comply with
this subpart by January 16, 2003, or at the time you begin operating,
whichever is later.
    (b) If your landfill is an existing affected source, you must
comply with this subpart by January 16, 2004.

Sec.  63.1947  When do I have to comply with this subpart if I own or
operate a bioreactor?

    You must comply with this subpart by the dates specified in Sec.
63.1945(a) or (b). If you own or operate a bioreactor located at a
landfill that is not permanently closed as of January 16, 2003, and has
a design capacity equal to or greater than 2.5 million Mg and 2.5
million m\3\, then you must install and operate a collection and
control system that meets the criteria in Sec.  63.1959(b)(2) according
to the schedule specified in paragraph (a), (b), or (c) of this
section.
    (a) If your bioreactor is at a new affected source, then you must
meet the requirements in paragraphs (a)(1) and (2) of this section:
    (1) Install the gas collection and control system for the
bioreactor before initiating liquids addition.
    (2) Begin operating the gas collection and control system within
180 days after initiating liquids addition or within 180 days after
achieving a moisture content of 40 percent by weight, whichever is
later. If you choose

to begin gas collection and control system operation 180 days after
achieving a 40-percent moisture content instead of 180 days after
liquids addition, use the procedures in Sec. Sec.  63.1982(c) and (d)
to determine when the bioreactor moisture content reaches 40 percent.
    (b) If your bioreactor is at an existing affected source, then you
must install and begin operating the gas collection and control system
for the bioreactor by January 17, 2006, or by the date your bioreactor
is required to install a gas collection and control system under 40 CFR
part 60, subpart WWW; a federal plan; or an EPA-approved and effective
state plan or tribal plan that applies to your landfill, whichever is
earlier.
    (c) If your bioreactor is at an existing affected source and you do
not initiate liquids addition to your bioreactor until later than
January 17, 2006, then you must meet the requirements in paragraphs
(c)(1) and (2) of this section:
    (1) Install the gas collection and control system for the
bioreactor before initiating liquids addition.
    (2) Begin operating the gas collection and control system within
180 days after initiating liquids addition or within 180 days after
achieving a moisture content of 40 percent by weight, whichever is
later. If you choose to begin gas collection and control system
operation 180 days after achieving a 40-percent moisture content
instead of 180 days after liquids addition, use the procedures in Sec.
63.1980(e) and (f) to determine when the bioreactor moisture content
reaches 40 percent.

Sec.  63.1950  When am I no longer required to comply with this
subpart?

    You are no longer required to comply with the requirements of this
subpart when your landfill meets the collection and control system
removal criteria in Sec.  63.1957(b).

Sec.  63.1952  When am I no longer required to comply with the
requirements of this subpart if I own or operate a bioreactor?

    If you own or operate a landfill that includes a bioreactor, you
are no longer required to comply with the requirements of this subpart
for the bioreactor provided you meet the conditions of either paragraph
(a) or (b) of this section.
    (a) Your affected source meets the control system removal criteria
in Sec.  63.1950 or the bioreactor meets the criteria for a
nonproductive area of the landfill in Sec.  63.1962(a)(3)(ii).
    (b) The bioreactor portion of the landfill is a closed landfill as
defined in Sec.  63.1990, you have permanently ceased adding liquids to
the bioreactor, and you have not added liquids to the bioreactor for at
least 1 year. A closure report for the bioreactor must be submitted to
the Administrator as provided in Sec.  63.1981(g).

Standards

Sec.  63.1955  What requirements must I meet?

    (a) Before September 28, 2021, if alternatives to the operational
standards, test methods, procedures, compliance measures, monitoring,
recordkeeping, or reporting provisions have already been approved under
40 CFR part 60, subpart WWW; subpart XXX; a federal plan; or an EPA-
approved and effective state or tribal plan, these alternatives can be
used to comply with this subpart, except that all affected sources must
comply with the SSM requirements in subpart A of this part as specified
in Table 1 of this subpart and all affected sources must submit
compliance reports every 6 months as specified in Sec.  63.1981(h),
including information on all deviations that occurred during the 6-
month reporting period. Deviations for continuous emission monitors or
numerical continuous parameter monitors must be determined using a 3-
hour monitoring block average. Beginning no later than September 28,
2021, the collection and control system design plan may include for
approval collection and control systems that include any alternatives
to the operational standards, test methods, procedures, compliance
measures, monitoring, recordkeeping, or reporting provisions, as
provided in Sec.  63.1981(d)(2).
    (b) If you own or operate a bioreactor that is located at an MSW
landfill that is not permanently closed and has a design capacity equal
to or greater than 2.5 million Mg and 2.5 million m\3\, then you must
meet the requirements of this subpart, including requirements in
paragraphs (b)(1) and (2) of this section.
    (1) You must comply with this subpart starting on the date you are
required to install the gas collection and control system.
    (2) You must extend the collection and control system into each new
cell or area of the bioreactor prior to initiating liquids addition in
that area.
    (c) At all times, beginning no later than September 27, 2021, the
owner or operator must operate and maintain any affected source,
including associated air pollution control equipment and monitoring
equipment, in a manner consistent with safety and good air pollution
control practices for minimizing emissions. The general duty to
minimize emissions does not require the owner or operator to make any
further efforts to reduce emissions if the requirements of this subpart
have been achieved. Determination of whether a source is operating in
compliance with operation and maintenance requirements will be based on
information available to the Administrator which may include, but is
not limited to, monitoring results, review of operation and maintenance
procedures, review of operation and maintenance records, and inspection
of the source.

Sec.  63.1957  Requirements for gas collection and control system
installation and removal.

    (a) Operation. Operate the collection and control device in
accordance with the provisions of Sec. Sec.  63.1958, 63.1960, and
63.1961.
    (b) Removal criteria. The collection and control system may be
capped, removed, or decommissioned if the following criteria are met:
    (1) The landfill is a closed landfill (as defined in Sec.
63.1990). A closure report must be submitted to the Administrator as
provided in Sec.  63.1981(f);
    (2) The gas collection and control system has been in operation a
minimum of 15 years or the landfill owner or operator demonstrates that
the gas collection and control system will be unable to operate for 15
years due to declining gas flow; and
    (3) Following the procedures specified in Sec.  63.1959(c), the
calculated NMOC emission rate at the landfill is less than 50 Mg/yr on
three successive test dates. The test dates must be no less than 90
days apart, and no more than 180 days apart.

Sec.  63.1958  Operational standards for collection and control
systems.

    Each owner or operator of an MSW landfill with a gas collection and
control system used to comply with the provisions of Sec.  63.1957
must:
    (a) Operate the collection system such that gas is collected from
each area, cell, or group of cells in the MSW landfill in which solid
waste has been in place for:
    (1) 5 years or more if active; or
    (2) 2 years or more if closed or at final grade;
    (b) Operate the collection system with negative pressure at each
wellhead except under the following conditions:
    (1) A fire or increased well temperature. The owner or operator
must record instances when positive pressure occurs in efforts to avoid
a fire. These records must be submitted with the semi-annual reports as
provided in Sec.  63.1981(h);

    (2) Use of a geomembrane or synthetic cover. The owner or operator
must develop acceptable pressure limits in the design plan;
    (3) A decommissioned well. A well may experience a static positive
pressure after shut down to accommodate for declining flows. All design
changes must be approved by the Administrator as specified in Sec.
63.1981(d)(2);
    (c) Operate each interior wellhead in the collection system as
specified in Sec.  60.753(c), except:
    (1) Beginning no later than September 27, 2021, operate each
interior wellhead in the collection system with a landfill gas
temperature less than 62.8 degrees Celsius (145 degrees Fahrenheit).
    (2) The owner or operator may establish a higher operating
temperature value at a particular well. A higher operating value
demonstration must be submitted to the Administrator for approval and
must include supporting data demonstrating that the elevated parameter
neither causes fires nor significantly inhibits anaerobic decomposition
by killing methanogens. The demonstration must satisfy both criteria in
order to be approved (i.e., neither causing fires nor killing
methanogens is acceptable).
    (d)(1) Operate the collection system so that the methane
concentration is less than 500 parts per million (ppm) above background
at the surface of the landfill. To determine if this level is exceeded,
the owner or operator must conduct surface testing around the perimeter
of the collection area and along a pattern that traverses the landfill
at no more than 30-meter intervals and where visual observations
indicate elevated concentrations of landfill gas, such as distressed
vegetation and cracks or seeps in the cover. The owner or operator may
establish an alternative traversing pattern that ensures equivalent
coverage. A surface monitoring design plan must be developed that
includes a topographical map with the monitoring route and the
rationale for any site-specific deviations from the 30-meter intervals.
Areas with steep slopes or other dangerous areas may be excluded from
the surface testing.
    (2) Beginning no later than September 27, 2021, the owner or
operator must:
    (i) Conduct surface testing using an organic vapor analyzer, flame
ionization detector, or other portable monitor meeting the
specifications provided in Sec.  63.1960(d).
    (ii) Conduct surface testing at all cover penetrations. Thus, the
owner or operator must monitor any cover penetrations that are within
an area of the landfill where waste has been placed and a gas
collection system is required.
    (iii) Determine the latitude and longitude coordinates of each
exceedance using an instrument with an accuracy of at least 4 meters.
The coordinates must be in decimal degrees with at least five decimal
places.
    (e) Operate the system as specified in Sec.  60.753(e) of this
chapter, except:
    (1) Beginning no later than September 27, 2021, operate the system
in accordance to Sec.  63.1955(c) such that all collected gases are
vented to a control system designed and operated in compliance with
Sec.  63.1959(b)(2)(iii). In the event the collection or control system
is not operating:
    (i) The gas mover system must be shut down and all valves in the
collection and control system contributing to venting of the gas to the
atmosphere must be closed within 1 hour of the collection or control
system not operating; and
    (ii) Efforts to repair the collection or control system must be
initiated and completed in a manner such that downtime is kept to a
minimum, and the collection and control system must be returned to
operation.
    (2) [Reserved]
    (f) Operate the control system at all times when the collected gas
is routed to the system.
    (g) If monitoring demonstrates that the operational requirements in
paragraph (b), (c), or (d) of this section are not met, corrective
action must be taken as specified in Sec.  63.1960(a)(3) and (5) or
(c). If corrective actions are taken as specified in Sec.  63.1960, the
monitored exceedance is not a deviation of the operational requirements
in this section.

Sec.  63.1959  NMOC calculation procedures.

    (a) Calculate the NMOC emission rate using the procedures specified
in Sec.  60.754(a) of this chapter, except:
    (1) NMOC emission rate. Beginning no later than September 27, 2021
the landfill owner or operator must calculate the NMOC emission rate
using either Equation 1 provided in paragraph (a)(1)(i) of this section
or Equation 2 provided in paragraph (a)(1)(ii) of this section. Both
Equation 1 and Equation 2 may be used if the actual year-to-year solid
waste acceptance rate is known, as specified in paragraph (a)(1)(i) 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
paragraph (a)(1)(ii) of this section, for part of the life of the
landfill. The values to be used in both Equation 1 and Equation 2 are
0.05 per year for k, 170 cubic meters per megagram (m\3\/Mg) for
LO, and 4,000 parts per million by volume (ppmv) as hexane
for the CNMOC. For landfills located in geographical areas
with a 30-year annual average precipitation of less than 25 inches, as
measured at the nearest representative official meteorologic site, the
k value to be used is 0.02 per year.
    (i)(A) Equation 1 must be used if the actual year-to-year solid
waste acceptance rate is known.
[GRAPHIC] [TIFF OMITTED] TR26MR20.007

Where:

MNMOC = Total NMOC emission rate from the landfill, Mg/
yr.
k = Methane generation rate constant, year-1.
Lo = Methane generation potential, m\3\/Mg solid waste.
Mi = Mass of solid waste in the ith section, Mg.
ti = Age of the ith section, years.
CNMOC = Concentration of NMOC, ppmv as hexane.
3.6 x 10-9 = Conversion factor.

    (B) 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.
    (ii)(A) Equation 2 must be used if the actual year-to-year solid
waste acceptance rate is unknown.
[GRAPHIC] [TIFF OMITTED] TR26MR20.011

Where:

MNMOC = Mass emission rate of NMOC, Mg/yr.
Lo = Methane generation potential, m\3\/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.
c = Time since closure, years; for active landfill c=0 and
e-kc = 1.
3.6 x 10-9 = Conversion factor.

    (B) 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
amount of such wastes is maintained.
    (2) Tier 1. The owner or operator must compare the calculated NMOC
mass emission rate to the standard of 50 Mg/yr.
    (i) If the NMOC emission rate calculated in paragraph (a)(1) of
this section is less than 50 Mg/yr, then the landfill owner or operator
must submit an NMOC emission rate report according to Sec.  63.1981(c)
and must recalculate the NMOC mass emission rate annually as required
under paragraph (b) of this section.
    (ii) If the calculated NMOC emission rate as calculated in
paragraph (a)(1) of this section is equal to or greater than 50 Mg/yr,
then the landfill owner must either:
    (A) Submit a gas collection and control system design plan within 1
year as specified in Sec.  63.1981(d) and install and operate a gas
collection and control system within 30 months of the first annual
report in which the NMOC emission rate equals or exceeds 50 Mg/yr,
according to paragraphs (b)(2)(ii) and (iii) of this section;
    (B) Determine a site-specific NMOC concentration and recalculate
the NMOC emission rate using the Tier 2 procedures provided in
paragraph (a)(3) of this section; or
    (C) Determine a site-specific methane generation rate constant and
recalculate the NMOC emission rate using the Tier 3 procedures provided
in paragraph (a)(4) of this section.
    (3) Tier 2. The landfill owner or operator must determine the site-
specific NMOC concentration using the following sampling procedure. The
landfill owner or operator must install at least two sample probes per
hectare, evenly distributed over the landfill surface that has retained
waste for at least 2 years. If the landfill is larger than 25 hectares
in area, only 50 samples are required. The probes should be evenly
distributed across the sample area. The sample probes should be located
to avoid known areas of nondegradable solid waste. The owner or
operator must collect and analyze one sample of landfill gas from each
probe to determine the NMOC concentration using EPA Method 25 or 25C of
appendix A-7 to part 60. Taking composite samples from different probes
into a single cylinder is allowed; however, equal sample volumes must
be taken from each probe. For each composite, the sampling rate,
collection times, beginning and ending cylinder vacuums, or alternative
volume measurements must be recorded to verify that composite volumes
are equal. Composite sample volumes should not be less than one liter
unless evidence can be provided to substantiate the accuracy of smaller
volumes. Terminate compositing before the cylinder approaches ambient
pressure where measurement accuracy diminishes. If more than the
required number of samples are taken, all samples must be used in the
analysis. The landfill owner or operator must divide the NMOC
concentration from EPA Method 25 or 25C of appendix A-7 to part 60 by 6
to convert from CNMOC as carbon to CNMOC as
hexane. If the landfill has an active or passive gas removal system in
place, EPA Method 25 or 25C samples may be collected from these systems
instead of surface probes provided the removal system can be shown to
provide sampling as representative as the two sampling probe per
hectare requirement. For active collection systems, samples may be
collected from the common header pipe. The sample location on the
common header pipe must be before any gas moving, condensate removal,
or treatment system equipment. For active collection systems, a minimum
of three samples must be collected from the header pipe.
    (i) Within 60 days after the date of completing each performance
test (as defined in Sec.  63.7 of subpart A), the owner or operator
must submit the results according to Sec.  63.1981(i).
    (ii) The landfill owner or operator must recalculate the NMOC mass
emission rate using Equation 1 or Equation 2 provided in paragraph
(a)(1)(i) or (ii) of this section and use the average site-specific
NMOC concentration from the collected samples instead of the default
value provided in paragraph (a)(1) of this section.
    (iii) If the resulting NMOC mass emission rate is less than 50 Mg/
yr, then the owner or operator must submit a periodic estimate of NMOC
emissions in an NMOC emission rate report according to Sec.  63.1981(c)
and must recalculate the NMOC mass emission rate annually as required
under paragraph (b) of this section. The site-specific NMOC
concentration must be retested every 5 years using the methods
specified in this section.
    (iv) If the NMOC mass emission rate as calculated using the Tier 2
site-specific NMOC concentration is equal to or greater than 50 Mg/yr,
the landfill owner or operator must either:
    (A) Submit a gas collection and control system design plan within 1
year as specified in Sec.  63.1981(d) and install and operate a gas
collection and control system within 30 months according to paragraphs
(b)(2)(ii) and (iii) of this section; or
    (B) Determine a site-specific methane generation rate constant and
recalculate the NMOC emission rate using the site-specific methane
generation rate using the Tier 3 procedures specified in paragraph
(a)(4) of this section.
    (4) Tier 3. The site-specific methane generation rate constant must
be determined using the procedures provided in EPA Method 2E of
appendix A-1 to part 60 of this chapter. The landfill owner or operator
must estimate the NMOC mass emission rate using Equation 1 or Equation
2 in paragraph (a)(1)(i) or (ii) of this section and using a site-
specific methane generation rate constant, and the site-specific NMOC
concentration as determined in paragraph (a)(3) of this section instead
of the default values provided in paragraph (a)(1) of this section. The
landfill owner or operator must compare the resulting NMOC mass
emission rate to the standard of 50 Mg/yr.
    (i) If the NMOC mass emission rate as calculated using the Tier 2
site-specific NMOC concentration and Tier 3 site-specific methane
generation rate is equal to or greater than 50 Mg/yr, the owner or
operator must:
    (A) Submit a gas collection and control system design plan within 1
year as specified in Sec.  63.1981(e) and install and operate a gas
collection and control system within 30 months of the first annual
report in which the NMOC emission rate equals or exceeds 50 Mg/yr,
according to paragraphs (b)(2)(ii) and (iii) of this section.
    (B) [Reserved]
    (ii) If the NMOC mass emission rate is less than 50 Mg/yr, then the
owner or operator must recalculate the NMOC mass emission rate annually
using Equation 1 or Equation 2 in paragraph (a)(1) of this section and
using the site-specific Tier 2 NMOC concentration and Tier 3 methane
generation rate constant and submit a periodic NMOC emission rate
report as provided in Sec.  63.1981(c).

The calculation of the methane generation rate constant is performed
only once, and the value obtained from this test must be used in all
subsequent annual NMOC emission rate calculations.
    (5) Other methods. The owner or operator may use other methods to
determine the NMOC concentration or a site-specific methane generation
rate constant as an alternative to the methods required in paragraphs
(a)(3) and (4) of this section if the method has been approved by the
Administrator.
    (b) Each owner or operator of an affected source having a design
capacity equal to or greater than 2.5 million Mg and 2.5 million m\3\
must either comply with paragraph (b)(2) of this section or calculate
an NMOC emission rate for the landfill using the procedures specified
in paragraph (a) of this section. The NMOC emission rate must be
recalculated annually, except as provided in Sec.
63.1981(c)(1)(ii)(A).
    (1) If the calculated NMOC emission rate is less than 50 Mg/yr, the
owner or operator must:
    (i) Submit an annual NMOC emission rate emission report to the
Administrator, except as provided for in Sec.  63.1981(c)(1)(ii); and
    (ii) Recalculate the NMOC emission rate annually using the
procedures specified in paragraph (a)(1) of this section until such
time as the calculated NMOC emission rate is equal to or greater than
50 Mg/yr, or the landfill is closed.
    (A) If the calculated NMOC emission rate, upon initial calculation
or annual recalculation required in paragraph (b) of this section, is
equal to or greater than 50 Mg/yr, the owner or operator must either:
comply with paragraph (b)(2) of this section or calculate NMOC
emissions using the next higher tier in paragraph (a) of this section.
    (B) If the landfill is permanently closed, a closure report must be
submitted to the Administrator as provided for in Sec.  63.1981(f).
    (2) If the calculated NMOC emission rate is equal to or greater
than 50 Mg/yr using Tier 1, 2, or 3 procedures, the owner or operator
must either:
    (i) Submit a collection and control system design plan prepared by
a professional engineer to the Administrator within 1 year as specified
in Sec.  63.1981(d) or calculate NMOC emissions using the next higher
tier in paragraph (a) of this section. The collection and control
system must meet the requirements in paragraphs (b)(2)(ii) and (iii) of
this section.
    (ii) Collection system. Install and start up a collection and
control system that captures the gas generated within the landfill as
required by paragraphs (b)(2)(ii)(B) or (C) and (b)(2)(iii) of this
section within 30 months after:
    (A) The first annual report in which the NMOC emission rate equals
or exceeds 50 Mg/yr, unless Tier 2 or Tier 3 sampling demonstrates that
the NMOC emission rate is less than 50 Mg.
    (B) An active collection system must:
    (1) Be designed to handle the maximum expected gas flow rate from
the entire area of the landfill that warrants control over the intended
use period of the gas control system equipment;
    (2) Collect gas from each area, cell, or group of cells in the
landfill in which the initial solid waste has been placed for a period
of 5 years or more if active; or 2 years or more if closed or at final
grade;
    (3) Collect gas at a sufficient extraction rate; and
    (4) Be designed to minimize off-site migration of subsurface gas.
    (C) A passive collection system must:
    (1) Comply with the provisions specified in paragraphs
(b)(2)(ii)(B)(1), (2), and (3) of this section; and
    (2) Be installed with liners on the bottom and all sides in all
areas in which gas is to be collected. The liners must be installed as
required under Sec.  258.40 of this chapter.
    (iii) Control system. Route all the collected gas to a control
system that complies with the requirements in either paragraph
(b)(2)(iii)(A), (B), or (C) of this section.
    (A) A non-enclosed flare designed and operated in accordance with
the parameters established in Sec.  63.11(b) except as noted in
paragraph (f) of this section; or
    (B) A control system designed and operated to reduce NMOC by 98
weight-percent, or, when an enclosed combustion device is used for
control, to either reduce NMOC by 98 weight-percent or reduce the
outlet NMOC concentration to less than 20 ppmv, dry basis as hexane at
3-percent oxygen. The reduction efficiency or ppmv must be established
by an initial performance test to be completed no later than 180 days
after the initial startup of the approved control system using the test
methods specified in paragraph (e) of this section. The performance
test is not required for boilers and process heaters with design heat
input capacities equal to or greater than 44 megawatts that burn
landfill gas for compliance with this subpart.
    (1) If a boiler or process heater is used as the control device,
the landfill gas stream must be introduced into the flame zone.
    (2) The control device must be operated within the parameter ranges
established during the initial or most recent performance test. The
operating parameters to be monitored are specified in Sec. Sec.
63.1961(b) through (e);
    (C) A treatment system that processes the collected gas for
subsequent sale or beneficial use such as fuel for combustion,
production of vehicle fuel, production of high-British thermal unit
(Btu) gas for pipeline injection, or use as a raw material in a
chemical manufacturing process. Venting of treated landfill gas to the
ambient air is not allowed. If the treated landfill gas cannot be
routed for subsequent sale or beneficial use, then the treated landfill
gas must be controlled according to either paragraph (b)(2)(iii)(A) or
(B) of this section.
    (D) All emissions from any atmospheric vent from the gas treatment
system are subject to the requirements of paragraph (b)(2)(iii)(A) or
(B) of this section. For purposes of this subpart, atmospheric vents
located on the condensate storage tank are not part of the treatment
system and are exempt from the requirements of paragraph (b)(2)(iii)(A)
or (B) of this section.
    (c) After the installation and startup of a collection and control
system in compliance with this subpart, the owner or operator must
calculate the NMOC emission rate for purposes of determining when the
system can be capped, removed, or decommissioned as provided in Sec.
63.1957(b)(3), using Equation 3:
[GRAPHIC] [TIFF OMITTED] TR26MR20.009

Where:

MNMOC = Mass emission rate of NMOC, Mg/yr.
QLFG = Flow rate of landfill gas, m\3\ per minute.
CNMOC = Average NMOC concentration, ppmv as hexane.
1.89 x 10-3 = Conversion factor.

    (1) The flow rate of landfill gas, QLFG, must be
determined by measuring the

total landfill gas flow rate at the common header pipe that leads to
the control system using a gas flow measuring device calibrated
according to the provisions of section 10 of EPA Method 2E of appendix
A-1 of part 60.
    (2) The average NMOC concentration, CNMOC, must be
determined by collecting and analyzing landfill gas sampled from the
common header pipe before the gas moving or condensate removal
equipment using the procedures in EPA Method 25 or 25C of appendix A-7
to part 60 of this chapter. The sample location on the common header
pipe must be before any condensate removal or other gas refining units.
The landfill owner or operator must divide the NMOC concentration from
EPA Method 25 or 25C of appendix A-7 to part 60 by 6 to convert from
CNMOC as carbon to CNMOC as hexane.
    (3) The owner or operator may use another method to determine
landfill gas flow rate and NMOC concentration if the method has been
approved by the Administrator.
    (i) Within 60 days after the date of completing each performance
test (as defined in Sec.  63.7), the owner or operator must submit the
results of the performance test, including any associated fuel
analyses, according to Sec.  63.1981(i).
    (ii) [Reserved]
    (d) For the performance test required in Sec.
63.1959(b)(2)(iii)(B), EPA Method 25 or 25C (EPA Method 25C of appendix
A-7 to part 60 of this chapter may be used at the inlet only) of
appendix A of this part must be used to determine compliance with the
98 weight-percent efficiency or the 20- ppmv outlet concentration
level, unless another method to demonstrate compliance has been
approved by the Administrator as provided by Sec.  63.1981(d)(2). EPA
Method 3, 3A, or 3C of appendix A-7 to part 60 must be used to
determine oxygen for correcting the NMOC concentration as hexane to 3
percent. In cases where the outlet concentration is less than 50 ppm
NMOC as carbon (8 ppm NMOC as hexane), EPA Method 25A should be used in
place of EPA Method 25. EPA Method 18 may be used in conjunction with
EPA Method 25A on a limited basis (compound specific, e.g., methane) or
EPA Method 3C may be used to determine methane. The methane as carbon
should be subtracted from the EPA Method 25A total hydrocarbon value as
carbon to give NMOC concentration as carbon. The landowner or operator
must divide the NMOC concentration as carbon by 6 to convert from the
CNMOC as carbon to CNMOC as hexane. Equation 4
must be used to calculate efficiency:
[GRAPHIC] [TIFF OMITTED] TR26MR20.012

Where:

NMOCin = Mass of NMOC entering control device.
NMOCout = Mass of NMOC exiting control device.

    (e) For the performance test required in Sec.
63.1959(b)(2)(iii)(A), the net heating value of the combusted landfill
gas as determined in Sec.  63.11(b)(6)(ii) is calculated from the
concentration of methane in the landfill gas as measured by EPA Method
3C of appendix A to part 60 of this chapter. A minimum of three 30-
minute EPA Method 3C samples are determined. The measurement of other
organic components, hydrogen, and carbon monoxide is not applicable.
EPA Method 3C may be used to determine the landfill gas molecular
weight for calculating the flare gas exit velocity under Sec.
63.11(b)(7) of subpart A.
    (1) Within 60 days after the date of completing each performance
test (as defined in Sec.  63.7), the owner or operator must submit the
results of the performance tests, including any associated fuel
analyses, required by Sec.  63.1959(c) or (e) according to Sec.
63.1981(i).
    (2) [Reserved]
    (f) The performance tests required in Sec. Sec.
63.1959(b)(2)(iii)(A) and (B), must be conducted under such conditions
as the Administrator specifies to the owner or operator based on
representative performance of the affected source for the period being
tested. Representative conditions exclude periods of startup and
shutdown unless specified by the Administrator. The owner or operator
may not conduct performance tests during periods of malfunction. The
owner or operator must record the process information that is necessary
to document operating conditions during the test and include in such
record an explanation to support that such conditions represent normal
operation. Upon request, the owner or operator shall make available to
the Administrator such records as may be necessary to determine the
conditions of performance tests.

Sec.  63.1960  Compliance provisions.

    (a) Except as provided in Sec.  63.1981(d)(2), the specified
methods in paragraphs (a)(1) through (6) of this section must be used
to determine whether the gas collection system is in compliance with
Sec.  63.1959(b)(2)(ii).
    (1) For the purposes of calculating the maximum expected gas
generation flow rate from the landfill to determine compliance with
Sec.  63.1959(b)(2)(ii)(C)(1), either Equation 5 or Equation 6 must be
used. The owner or operator may use another method to determine the
maximum gas generation flow rate, if the method has been approved by
the Administrator. The methane generation rate constant (k) and methane
generation potential (Lo) kinetic factors should be those
published in the most recent Compilation of Air Pollutant Emission
Factors (AP-42) or other site-specific values demonstrated to be
appropriate and approved by the Administrator. If k has been determined
as specified in Sec.  63.1959(a)(4), the value of k determined from the
test must be used. A value of no more than 15 years must be used for
the intended use period of the gas mover equipment. The active life of
the landfill is the age of the landfill plus the estimated number of
years until closure.
    (i) For sites with unknown year-to-year solid waste acceptance
rate:
[GRAPHIC] [TIFF OMITTED] TR26MR20.013

Where:

Qm = Maximum expected gas generation flow rate, m\3\/yr.
Lo = Methane generation potential, m\3\/Mg solid waste.
R = Average annual acceptance rate, Mg/yr.
k = Methane generation rate constant, year-1.
t = Age of the landfill at equipment installation plus the time the
owner or operator intends to use the gas mover equipment or active
life of the landfill,

whichever is less. If the equipment is installed after closure, t is
the age of the landfill at installation, years.
c = Time since closure, years (for an active landfill c = 0 and
e-kc = 1).
2 = Constant.

    (ii) For sites with known year-to-year solid waste acceptance rate:
    [GRAPHIC] [TIFF OMITTED] TR26MR20.008

Where:

Qm = Maximum expected gas generation flow rate, m\3\/yr.
k = Methane generation rate constant, year-1.
Lo = Methane generation potential, m\3\/Mg solid waste.
Mi = Mass of solid waste in the ith section, Mg.
ti = Age of the ith section, years.

    (iii) If a collection and control system has been installed, actual
flow data may be used to project the maximum expected gas generation
flow rate instead of, or in conjunction with, Equation 5 or Equation 6
in paragraphs (a)(1)(i) and (ii) of this section. If the landfill is
still accepting waste, the actual measured flow data will not equal the
maximum expected gas generation rate, so calculations using Equation 5
or Equation 6 in paragraph (a)(1)(i) or (ii) of this section or other
methods must be used to predict the maximum expected gas generation
rate over the intended period of use of the gas control system
equipment.
    (2) For the purposes of determining sufficient density of gas
collectors for compliance with Sec.  63.1959(b)(2)(ii)(B)(2), the owner
or operator must design a system of vertical wells, horizontal
collectors, or other collection devices, satisfactory to the
Administrator, capable of controlling and extracting gas from all
portions of the landfill sufficient to meet all operational and
performance standards.
    (3) For the purpose of demonstrating whether the gas collection
system flow rate is sufficient to determine compliance with Sec.
63.1959(b)(2)(ii)(B)(3), the owner or operator must measure gauge
pressure in the gas collection header applied to each individual well
monthly. Any attempted corrective measure must not cause exceedances of
other operational or performance standards. An alternative timeline for
correcting the exceedance may be submitted to the Administrator for
approval. If a positive pressure exists, follow the procedures as
specified in Sec.  60.755(a)(3), except:
    (i) Beginning no later than September 27, 2021, if a positive
pressure exists, action must be initiated to correct the exceedance
within 5 days, except for the three conditions allowed under Sec.
63.1958(b).
    (A) If negative pressure cannot be achieved without excess air
infiltration within 15 days of the first measurement of positive
pressure, the owner or operator must conduct a root cause analysis and
correct the exceedance as soon as practicable, but no later than 60
days after positive pressure was first measured. The owner or operator
must keep records according to Sec.  63.1983(e)(3).
    (B) If corrective actions cannot be fully implemented within 60
days following the positive pressure measurement for which the root
cause analysis was required, the owner or operator must also conduct a
corrective action analysis and develop an implementation schedule to
complete the corrective action(s) as soon as practicable, but no more
than 120 days following the positive pressure measurement. The owner or
operator must submit the items listed in Sec.  63.1981(h)(7) as part of
the next semi-annual report. The owner or operator must keep records
according to Sec.  63.1983(e)(5).
    (C) If corrective action is expected to take longer than 120 days
to complete after the initial exceedance, the owner or operator must
submit the root cause analysis, corrective action analysis, and
corresponding implementation timeline to the Administrator, according
to Sec.  63.1981(j). The owner or operator must keep records according
to Sec.  63.1983(e)(5).
    (ii) [Reserved]
    (4) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with the temperature and
nitrogen or oxygen operational standards in introductory paragraph
Sec.  63.1958(c), for the purpose of identifying whether excess air
infiltration into the landfill is occurring, the owner or operator must
follow the procedures as specified in Sec.  60.755(a)(5) of this
chapter, except:
    (i) Once an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with the operational standard
for temperature in Sec.  63.1958(c)(1), the owner or operator must
monitor each well monthly for temperature. If a well exceeds the
operating parameter for temperature as provided in Sec.  63.1958(c)(1),
action must be initiated to correct the exceedance within 5 days. Any
attempted corrective measure must not cause exceedances of other
operational or performance standards.
    (A) If a landfill gas temperature less than or equal to 62.8
degrees Celsius (145 degrees Fahrenheit) cannot be achieved within 15
days of the first measurement of landfill gas temperature greater than
62.8 degrees Celsius (145 degrees Fahrenheit), the owner or operator
must conduct a root cause analysis and correct the exceedance as soon
as practicable, but no later than 60 days after a landfill gas
temperature greater than 62.8 degrees Celsius (145 degrees Fahrenheit)
was first measured. The owner or operator must keep records according
to Sec.  63.1983(e)(3).
    (B) If corrective actions cannot be fully implemented within 60
days following the temperature measurement for which the root cause
analysis was required, the owner or operator must also conduct a
corrective action analysis and develop an implementation schedule to
complete the corrective action(s) as soon as practicable, but no more
than 120 days following the measurement of landfill gas temperature
greater than 62.8 degrees Celsius (145 degrees Fahrenheit). The owner
or operator must submit the items listed in Sec.  63.1981(h)(7) as part
of the next semi-annual report. The owner or operator must keep records
according to Sec.  63.1983(e)(4).
    (C) If corrective action is expected to take longer than 120 days
to complete after the initial exceedance, the owner or operator must
submit the root cause analysis, corrective action analysis, and
corresponding implementation timeline to the Administrator, according
to Sec.  63.1981(h)(7) and (j). The owner or operator must keep records
according to Sec.  63.1983(e)(5).
    (D) If a landfill gas temperature measured at either the wellhead
or at any point in the well is greater than or equal to 76.7 degrees
Celsius (170 degrees Fahrenheit) and the carbon monoxide concentration
measured, according to the procedures in Sec.  63.1961(a)(5)(vi) is
greater than or equal to 1,000 ppmv the corrective action(s) for the
wellhead temperature standard (62.8 degrees Celsius or 145 degrees
Fahrenheit) must be completed within 15 days.
    (5) An owner or operator seeking to demonstrate compliance with

Sec.  63.1959(b)(2)(ii)(B)(4) through the use of a collection system
not conforming to the specifications provided in Sec.  63.1962 must
provide information satisfactory to the Administrator as specified in
Sec.  63.1981(c)(3) demonstrating that off-site migration is being
controlled.
    (b) For purposes of compliance with Sec.  63.1958(a), each owner or
operator of a controlled landfill must place each well or design
component as specified in the approved design plan as provided in Sec.
63.1981(b). Each well must be installed no later than 60 days after the
date on which the initial solid waste has been in place for a period
of:
    (1) 5 years or more if active; or
    (2) 2 years or more if closed or at final grade.
    (c) The following procedures must be used for compliance with the
surface methane operational standard as provided in Sec.  63.1958(d).
    (1) After installation and startup of the gas collection system,
the owner or operator must monitor surface concentrations of methane
along the entire perimeter of the collection area and along a pattern
that traverses the landfill at 30 meter intervals (or a site-specific
established spacing) for each collection area on a quarterly basis
using an organic vapor analyzer, flame ionization detector, or other
portable monitor meeting the specifications provided in paragraph (d)
of this section.
    (2) The background concentration must be determined by moving the
probe inlet upwind and downwind outside the boundary of the landfill at
a distance of at least 30 meters from the perimeter wells.
    (3) Surface emission monitoring must be performed in accordance
with section 8.3.1 of EPA Method 21 of appendix A-7 of part 60 of this
chapter, except that the probe inlet must be placed within 5 to 10
centimeters of the ground. Monitoring must be performed during typical
meteorological conditions.
    (4) Any reading of 500 ppm or more above background at any location
must be recorded as a monitored exceedance and the actions specified in
paragraphs (c)(4)(i) through (v) of this section must be taken. As long
as the specified actions are taken, the exceedance is not a violation
of the operational requirements of Sec.  63.1958(d).
    (i) The location of each monitored exceedance must be marked and
the location and concentration recorded. Beginning no later than
September 27, 2021, the location must be recorded using an instrument
with an accuracy of at least 4 meters. The coordinates must be in
decimal degrees with at least five decimal places.
    (ii) Cover maintenance or adjustments to the vacuum of the adjacent
wells to increase the gas collection in the vicinity of each exceedance
must be made and the location must be re-monitored within 10 days of
detecting the exceedance.
    (iii) If the re-monitoring of the location shows a second
exceedance, additional corrective action must be taken and the location
must be monitored again within 10 days of the second exceedance. If the
re-monitoring shows a third exceedance for the same location, the
action specified in paragraph (c)(4)(v) of this section must be taken,
and no further monitoring of that location is required until the action
specified in paragraph (c)(4)(v) of this section has been taken.
    (iv) Any location that initially showed an exceedance but has a
methane concentration less than 500 ppm methane above background at the
10-day re-monitoring specified in paragraph (c)(4)(ii) or (iii) of this
section must be re-monitored 1 month from the initial exceedance. If
the 1-month re-monitoring shows a concentration less than 500 ppm above
background, no further monitoring of that location is required until
the next quarterly monitoring period. If the 1-month re-monitoring
shows an exceedance, the actions specified in paragraph (c)(4)(iii) or
(v) of this section must be taken.
    (v) For any location where monitored methane concentration equals
or exceeds 500 ppm above background three times within a quarterly
period, a new well or other collection device must be installed within
120 days of the initial exceedance. An alternative remedy to the
exceedance, such as upgrading the blower, header pipes or control
device, and a corresponding timeline for installation may be submitted
to the Administrator for approval.
    (5) The owner or operator must implement a program to monitor for
cover integrity and implement cover repairs as necessary on a monthly
basis.
    (d) Each owner or operator seeking to comply with the provisions in
paragraph (c) of this section must comply with the following
instrumentation specifications and procedures for surface emission
monitoring devices:
    (1) The portable analyzer must meet the instrument specifications
provided in section 6 of EPA Method 21 of appendix A of part 60 of this
chapter, except that ``methane'' replaces all references to ``VOC''.
    (2) The calibration gas must be methane, diluted to a nominal
concentration of 500 ppm in air.
    (3) To meet the performance evaluation requirements in section 8.1
of EPA Method 21 of appendix A of part 60 of this chapter, the
instrument evaluation procedures of section 8.1 of EPA Method 21 of
appendix A of part 60 must be used.
    (4) The calibration procedures provided in sections 8 and 10 of EPA
Method 21 of appendix A of part 60 of this chapter must be followed
immediately before commencing a surface monitoring survey.
    (e)(1) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with the operational standards
in introductory paragraph Sec.  63.1958(e), the provisions of this
subpart apply at all times, except during periods of SSM, provided that
the duration of SSM does not exceed 5 days for collection systems and
does not exceed 1 hour for treatment or control devices. You must
comply with the provisions in Table 1 to subpart AAAA that apply before
September 28, 2021.
    (2) Once an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with the operational standard
in Sec.  63.1958(c)(1), the provisions of this subpart apply at all
times, including periods of SSM. During periods of SSM, you must comply
with the work practice requirement specified in Sec.  63.1958(e) in
lieu of the compliance provisions in Sec.  63.1960.

Sec.  63.1961  Monitoring of operations.

    Except as provided in Sec.  63.1981(d)(2):
    (a) Each owner or operator seeking to comply with Sec.
63.1959(b)(2)(ii)(B) for an active gas collection system must install a
sampling port and a thermometer, other temperature measuring device, or
an access port for temperature measurements at each wellhead and:
    (1) Measure the gauge pressure in the gas collection header on a
monthly basis as provided in Sec.  63.1960(a)(3); and
    (2) Monitor nitrogen or oxygen concentration in the landfill gas on
a monthly basis as follows:
    (i) The nitrogen level must be determined using EPA Method 3C of
appendix A-2 to part 60 of this chapter, unless an alternative test
method is established as allowed by Sec.  63.1981(d)(2).
    (ii) Unless an alternative test method is established as allowed by
Sec.  63.1981(d)(2), the oxygen level must be determined by an oxygen
meter using EPA Method 3A or 3C of appendix A-2 to part 60 of this
chapter or ASTM

D6522-11 (incorporated by reference, see Sec.  63.14). Determine the
oxygen level by an oxygen meter using EPA Method 3A or 3C of appendix
A-2 to part 60 or ASTM D6522-11 (if sample location is prior to
combustion) except that:
    (A) The span must be set between 10- and 12-percent oxygen;
    (B) A data recorder is not required;
    (C) Only two calibration gases are required, a zero and span;
    (D) A calibration error check is not required; and
    (E) The allowable sample bias, zero drift, and calibration drift
are 10 percent.
    (iii) A portable gas composition analyzer may be used to monitor
the oxygen levels provided:
    (A) The analyzer is calibrated; and
    (B) The analyzer meets all quality assurance and quality control
requirements for EPA Method 3A of appendix A-2 to part 60 of this
chapter or ASTM D6522-11 (incorporated by reference, see Sec.  63.14).
    (3) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with the temperature and
nitrogen or oxygen operational standards in introductory paragraph
Sec.  63.1958(c), the owner or operator must follow the procedures as
specified in Sec.  60.756(a)(2) and (3) of this chapter. Monitor
temperature of the landfill gas on a monthly basis as provided in Sec.
63.1960(a)(4). The temperature measuring device must be calibrated
annually using the procedure in Section 10.3 of EPA Method 2 of
appendix A-1 to part 60 of this chapter.
    (4) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with the operational standard
for temperature in Sec.  63.1958(c)(1), monitor temperature of the
landfill gas on a monthly basis as provided in Sec.  63.1960(a)(4). The
temperature measuring device must be calibrated annually using the
procedure in Section 10.3 of EPA Method 2 of appendix A-1 to part 60 of
this chapter. Keep records specified in Sec.  63.1983(e).
    (5) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with the operational standard
for temperature in Sec.  63.1958(c)(1), unless a higher operating
temperature value has been approved by the Administrator under this
subpart or under 40 CFR part 60, subpart WWW; 40 CFR part 60, subpart
XXX; or a federal plan or EPA-approved and effective state plan or
tribal plan that implements either 40 CFR part 60, subpart Cc or 40 CFR
part 60, subpart Cf, you must initiate enhanced monitoring at each well
with a measurement of landfill gas temperature greater than 62.8
degrees Celsius (145 degrees Fahrenheit) as follows:
    (i) Visual observations for subsurface oxidation events (smoke,
smoldering ash, damage to well) within the radius of influence of the
well.
    (ii) Monitor oxygen concentration as provided in paragraph (a)(2)
of this section;
    (iii) Monitor temperature of the landfill gas at the wellhead as
provided in paragraph (a)(4) of this section.
    (iv) Monitor temperature of the landfill gas every 10 vertical feet
of the well as provided in paragraph (a)(6) of this section.
    (v) Monitor the methane concentration with a methane meter using
EPA Method 3C of appendix A-6 to part 60, EPA Method 18 of appendix A-6
to part 60 of this chapter, or a portable gas composition analyzer to
monitor the methane levels provided that the analyzer is calibrated and
the analyzer meets all quality assurance and quality control
requirements for EPA Method 3C or EPA Method 18.
    (vi) Monitor carbon monoxide concentrations, as follows:
    (A) Collect the sample from the wellhead sampling port in a
passivated canister or multi-layer foil gas sampling bag (such as the
Cali-5-Bond Bag) and analyze that sample using EPA Method 10 of
appendix A-4 to part 60 of this chapter, or an equivalent method with a
detection limit of at least 100 ppmv of carbon monoxide in high
concentrations of methane; and
    (B) Collect and analyze the sample from the wellhead using EPA
Method 10 of appendix A-4 to part 60 to measure carbon monoxide
concentrations.
    (vii) The enhanced monitoring this paragraph (a)(5) must begin 7
days after the first measurement of landfill gas temperature greater
than 62.8 degrees Celsius (145 degrees Fahrenheit); and
    (viii) The enhanced monitoring in this paragraph (a)(5) must be
conducted on a weekly basis. If four consecutive weekly carbon monoxide
readings are under 100 ppmv, then enhanced monitoring may be decreased
to monthly. However, if carbon monoxide readings exceed 100 ppmv again,
the landfill must return to weekly monitoring.
    (ix) The enhanced monitoring in this paragraph (a)(5) can be
stopped once a higher operating value is approved, at which time the
monitoring provisions issued with the higher operating value should be
followed, or once the measurement of landfill gas temperature at the
wellhead is less than or equal to 62.8 degrees Celsius (145 degrees
Fahrenheit).
    (6) For each wellhead with a measurement of landfill gas
temperature greater than or equal to 73.9 degrees Celsius (165 degrees
Fahrenheit), annually monitor temperature of the landfill gas every 10
vertical feet of the well. This temperature can be monitored either
with a removable thermometer, or using temporary or permanent
thermocouples installed in the well.
    (b) Each owner or operator seeking to comply with Sec.
63.1959(b)(2)(iii) using an enclosed combustor must calibrate,
maintain, and operate according to the manufacturer's specifications,
the following equipment:
    (1) A temperature monitoring device equipped with a continuous
recorder and having a minimum accuracy of 1 percent of the
temperature being measured expressed in degrees Celsius or 0.5 degrees Celsius, whichever is greater. A temperature
monitoring device is not required for boilers or process heaters with
design heat input capacity equal to or greater than 44 megawatts.
    (2) A device that records flow to the control device and bypass of
the control device (if applicable). The owner or operator must:
    (i) Install, calibrate, and maintain a gas flow rate measuring
device that must record the flow to the control device at least every
15 minutes; and
    (ii) Secure the bypass line valve in the closed position with a
car-seal or a lock-and-key type configuration. A visual inspection of
the seal or closure mechanism must be performed at least once every
month to ensure that the valve is maintained in the closed position and
that the gas flow is not diverted through the bypass line.
    (c) Each owner or operator seeking to comply with Sec.
63.1959(b)(2)(iii) using a non-enclosed flare must install, calibrate,
maintain, and operate according to the manufacturer's specifications
the following equipment:
    (1) A heat sensing device, such as an ultraviolet beam sensor or
thermocouple, at the pilot light or the flame itself to indicate the
continuous presence of a flame; and
    (2) A device that records flow to the flare and bypass of the flare
(if applicable). The owner or operator must:
    (i) Install, calibrate, and maintain a gas flow rate measuring
device that records the flow to the control device at least every 15
minutes; and
    (ii) Secure the bypass line valve in the closed position with a
car-seal or a lock-and-key type configuration. A visual inspection of
the seal or closure mechanism must be performed at least

once every month to ensure that the valve is maintained in the closed
position and that the gas flow is not diverted through the bypass line.
    (d) Each owner or operator seeking to demonstrate compliance with
Sec.  63.1959(b)(2)(iii) using a device other than a non-enclosed flare
or an enclosed combustor or a treatment system must provide information
satisfactory to the Administrator as provided in Sec.  63.1981(d)(2)
describing the operation of the control device, the operating
parameters that would indicate proper performance, and appropriate
monitoring procedures. The Administrator must review the information
and either approve it, or request that additional information be
submitted. The Administrator may specify additional appropriate
monitoring procedures.
    (e) Each owner or operator seeking to install a collection system
that does not meet the specifications in Sec.  63.1962 or seeking to
monitor alternative parameters to those required by Sec. Sec.  63.1958
through 63.1961 must provide information satisfactory to the
Administrator as provided in Sec.  63.1981(d)(2) and (3) describing the
design and operation of the collection system, the operating parameters
that would indicate proper performance, and appropriate monitoring
procedures. The Administrator may specify additional appropriate
monitoring procedures.
    (f) Each owner or operator seeking to demonstrate compliance with
the 500-ppm surface methane operational standard in Sec.  63.1958(d)
must monitor surface concentrations of methane according to the
procedures in Sec.  63.1960(c) and the instrument specifications in
Sec.  63.1960(d). If you are complying with the 500-ppm surface methane
operational standard in Sec.  63.1958(d)(2), for location, you must
determine the latitude and longitude coordinates of each exceedance
using an instrument with an accuracy of at least 4 meters and the
coordinates must be in decimal degrees with at least five decimal
places. In the semi-annual report in 63.1981(i), you must report the
location of each exceedance of the 500-ppm methane concentration as
provided in Sec.  63.1958(d) and the concentration recorded at each
location for which an exceedance was recorded in the previous month.
Any closed landfill that has no monitored exceedances of the
operational standard in three consecutive quarterly monitoring periods
may skip to annual monitoring. Any methane reading of 500 ppm or more
above background detected during the annual monitoring returns the
frequency for that landfill to quarterly monitoring.
    (g) Each owner or operator seeking to demonstrate compliance with
Sec.  63.1959(b)(2)(iii)(C) using a landfill gas treatment system must
calibrate, maintain, and operate according to the manufacturer's
specifications a device that records flow to the treatment system and
bypass of the treatment system (if applicable). Beginning no later than
September 27, 2021, each owner or operator must maintain and operate
all monitoring systems associated with the treatment system in
accordance with the site-specific treatment system monitoring plan
required in Sec.  63.1983(b)(5)(ii). The owner or operator must:
    (1) Install, calibrate, and maintain a gas flow rate measuring
device that records the flow to the treatment system at least every 15
minutes; and
    (2) Secure the bypass line valve in the closed position with a car-
seal or a lock-and-key type configuration. A visual inspection of the
seal or closure mechanism must be performed at least once every month
to ensure that the valve is maintained in the closed position and that
the gas flow is not diverted through the bypass line.
    (h) The monitoring requirements of paragraphs (a), (b), (c), (d),
and (g) of this section apply at all times the affected source is
operating, except for periods of monitoring system malfunctions,
repairs associated with monitoring system malfunctions, and required
monitoring system quality assurance or quality control activities. A
monitoring system malfunction is any sudden, infrequent, not reasonably
preventable failure of the monitoring system to provide valid data.
Monitoring system failures that are caused in part by poor maintenance
or careless operation are not malfunctions. You are required to
complete monitoring system repairs in response to monitoring system
malfunctions and to return the monitoring system to operation as
expeditiously as practicable. Where an owner or operator subject to the
provisions of this subpart seeks to demonstrate compliance with the
temperature and nitrogen or oxygen operational standards in
introductory paragraph Sec.  63.1958(c)(1), (d)(2), and (e)(1), the
standards apply at all times.

Sec.  63.1962  Specifications for active collection systems.

    (a) Each owner or operator seeking to comply with Sec.
63.1959(b)(2)(i) must site active collection wells, horizontal
collectors, surface collectors, or other extraction devices at a
sufficient density throughout all gas producing areas using the
following procedures unless alternative procedures have been approved
by the Administrator as provided in Sec.  63.1981(d)(2) and (3):
    (1) The collection devices within the interior must be certified to
achieve comprehensive control of surface gas emissions by a
professional engineer. The following issues must be addressed in the
design: Depths of refuse, refuse gas generation rates and flow
characteristics, cover properties, gas system expandability, leachate
and condensate management, accessibility, compatibility with filling
operations, integration with closure end use, air intrusion control,
corrosion resistance, fill settlement, resistance to the refuse
decomposition heat, and ability to isolate individual components or
sections for repair or troubleshooting without shutting down entire
collection system.
    (2) The sufficient density of gas collection devices determined in
paragraph (a)(1) of this section must address landfill gas migration
issues and augmentation of the collection system through the use of
active or passive systems at the landfill perimeter or exterior.
    (3) The placement of gas collection devices determined in paragraph
(a)(1) of this section must control all gas producing areas, except as
provided by paragraphs (a)(3)(i) and (ii) of this section.
    (i) Any segregated area of asbestos or nondegradable material may
be excluded from collection if documented as provided under Sec.
63.1983(d). The documentation must provide the nature, date of
deposition, location and amount of asbestos or nondegradable material
deposited in the area and must be provided to the Administrator upon
request.
    (ii) Any nonproductive area of the landfill may be excluded from
control, provided that the total of all excluded areas can be shown to
contribute less than 1 percent of the total amount of NMOC emissions
from the landfill. The amount, location, and age of the material must
be documented and provided to the Administrator upon request. A
separate NMOC emissions estimate must be made for each section proposed
for exclusion, and the sum of all such sections must be compared to the
NMOC emissions estimate for the entire landfill.
    (A) The NMOC emissions from each section proposed for exclusion
must be computed using Equation 7:

[GRAPHIC] [TIFF OMITTED] TR26MR20.010

Where:

Qi = NMOC emission rate from the ith section, Mg/yr.
k = Methane generation rate constant, year -1.
Lo = Methane generation potential, m\3\/Mg solid waste.
Mi = Mass of the degradable solid waste in the ith
section, Mg.
ti = Age of the solid waste in the ith section, years.
CNMOC = Concentration of NMOC, ppmv.
3.6 x 10-9 = Conversion factor.

    (B) If the owner/operator is proposing to exclude, or cease gas
collection and control from, nonproductive physically separated (e.g.,
separately lined) closed areas that already have gas collection
systems, NMOC emissions from each physically separated closed area must
be computed using either Equation 3 in Sec.  63.1959(c) or Equation 7
in paragraph (a)(3)(ii)(A) of this section.
    (iii) The values for k and CNMOC determined in field
testing must be used if field testing has been performed in determining
the NMOC emission rate or the radii of influence (the distance from the
well center to a point in the landfill where the pressure gradient
applied by the blower or compressor approaches zero). If field testing
has not been performed, the default values for k, Lo and
CNMOC provided in Sec.  63.1959(a)(1) or the alternative
values from Sec.  63.1959(a)(5) must be used. The mass of nondegradable
solid waste contained within the given section may be subtracted from
the total mass of the section when estimating emissions provided the
nature, location, age, and amount of the nondegradable material is
documented as provided in paragraph (a)(3)(i) of this section.
    (b) Each owner or operator seeking to comply with Sec.
63.1959(b)(2)(ii) must construct the gas collection devices using the
following equipment or procedures:
    (1) The landfill gas extraction components must be constructed of
polyvinyl chloride (PVC), high density polyethylene (HDPE) pipe,
fiberglass, stainless steel, or other nonporous corrosion resistant
material of suitable dimensions to: Convey projected amounts of gases;
withstand installation, static, and settlement forces; and withstand
planned overburden or traffic loads. The collection system must extend
as necessary to comply with emission and migration standards.
Collection devices such as wells and horizontal collectors must be
perforated to allow gas entry without head loss sufficient to impair
performance across the intended extent of control. Perforations must be
situated with regard to the need to prevent excessive air infiltration.
    (2) Vertical wells must be placed so as not to endanger underlying
liners and must address the occurrence of water within the landfill.
Holes and trenches constructed for piped wells and horizontal
collectors must be of sufficient cross-section so as to allow for their
proper construction and completion including, for example, centering of
pipes and placement of gravel backfill. Collection devices must be
designed so as not to allow indirect short circuiting of air into the
cover or refuse into the collection system or gas into the air. Any
gravel used around pipe perforations should be of a dimension so as not
to penetrate or block perforations.
    (3) Collection devices may be connected to the collection header
pipes below or above the landfill surface. The connector assembly must
include a positive closing throttle valve, any necessary seals and
couplings, access couplings and at least one sampling port. The
collection devices must be constructed of PVC, HDPE, fiberglass,
stainless steel, or other nonporous material of suitable thickness.
    (c) Each owner or operator seeking to comply with Sec.
63.1959(b)(2)(iii) must convey the landfill gas to a control system in
compliance with Sec.  63.1959(b)(2)(iii) through the collection header
pipe(s). The gas mover equipment must be sized to handle the maximum
gas generation flow rate expected over the intended use period of the
gas moving equipment using the following procedures:
    (1) For existing collection systems, the flow data must be used to
project the maximum flow rate. If no flow data exists, the procedures
in paragraph (c)(2) of this section must be used.
    (2) For new collection systems, the maximum flow rate must be in
accordance with Sec.  63.1960(a)(1).

General and Continuing Compliance Requirements

Sec.  63.1964  How is compliance determined?

    Compliance is determined using performance testing, collection
system monitoring, continuous parameter monitoring, and other credible
evidence. In addition, continuous parameter monitoring data collected
under Sec.  63.1961(b)(1), (c)(1), and (d) are used to demonstrate
compliance with the operating standards for control systems. If a
deviation occurs, you have failed to meet the control device operating
standards described in this subpart and have deviated from the
requirements of this subpart.
    (a) Before September 28, 2021, you must develop a written SSM plan
according to the provisions in Sec.  63.6(e)(3) of subpart A. A copy of
the SSM plan must be maintained on site. Failure to write or maintain a
copy of the SSM plan is a deviation from the requirements of this
subpart.
    (b) After September 27, 2021, the SSM provisions of Sec.  63.6(e)
of subpart A no longer apply to this subpart and the SSM plan developed
under paragraph (a) of this section no longer applies. Compliance with
the emissions standards and the operating standards of Sec.  63.1958 of
this subpart is required at all times.

Sec.  63.1965  What is a deviation?

    A deviation is defined in Sec.  63.1990. For the purposes of the
landfill monitoring and SSM plan requirements, deviations include the
items in paragraphs (a) through (c) of this section.
    (a) A deviation occurs when the control device operating parameter
boundaries described in Sec.  63.1983(c)(1) are exceeded.
    (b) A deviation occurs when 1 hour or more of the hours during the
3-hour block averaging period does not constitute a valid hour of data.
A valid hour of data must have measured values for at least three 15-
minute monitoring periods within the hour.
    (c) Before September 28, 2021, a deviation occurs when a SSM plan
is not developed or maintained on site and when an affected source
fails to meet any emission limitation, (including any operating limit),
or work practice requirement in this subpart during SSM, regardless of
whether or not such failure is permitted by this subpart.

Sec.  63.1975  How do I calculate the 3-hour block average used to
demonstrate compliance?

    Before September 28, 2021, averages are calculated in the same way
as they are calculated in 40 CFR part 60, subpart WWW (Sec.
60.758(b)(2)(i) for average combustion temperature and Sec.  60.758(c)
for 3-hour average combustion temperature for enclosed combustors),
except that the data collected during the events listed in paragraphs
(a) through (d) of this section are not to be included in any average
computed under this subpart. Beginning

no later than September 27, 2021, averages are calculated according to
Sec. Sec.  63.1983(b)(2)(i) and 63.1983(c)(1)(i) and the data collected
during the events listed in paragraphs (a) through (d) of this section
are included in any average computed under this subpart.
    (a) Monitoring system breakdowns, repairs, calibration checks, and
zero (low-level) and high-level adjustments.
    (b) Startups.
    (c) Shutdowns.
    (d) Malfunctions.

Notifications, Records, and Reports

Sec.  63.1981  What reports must I submit?

    You must submit the reports specified in this section and the
reports specified in Table 1 to this subpart. If you have previously
submitted a design capacity report, amended design capacity report,
initial NMOC emission rate report, initial or revised collection and
control system design plan, closure report, equipment removal report,
or initial performance test under 40 CFR part 60, subpart WWW; 40 CFR
part 60, subpart XXX; or a federal plan or EPA-approved and effective
state plan or tribal plan that implements either 40 CFR part 60,
subpart Cc or 40 CFR part 60, subpart Cf, then that submission
constitutes compliance with the design capacity report in paragraph (a)
of this section, the amended design capacity report in paragraph (b) of
this section, the initial NMOC emission rate report in paragraph (c) of
this section, the initial collection and control system design plan in
paragraph (d) of this section, the revised design plan in paragraph (e)
of this section, the closure report in paragraph (f) of this section,
the equipment removal report in paragraph (g) of this section, and the
initial performance test report in paragraph (i) of this section. You
do not need to re-submit the report(s). However, you must include a
statement certifying prior submission of the respective report(s) and
the date of submittal in the first semi-annual report required in this
section.
    (a) Initial design capacity report. The initial design capacity
report must contain the information specified in Sec.  60.757(a)(2) of
this chapter, except beginning no later than September 28, 2021, the
report must contain:
    (1) A map or plot of the landfill, providing the size and location
of the landfill, and identifying all areas where solid waste may be
landfilled according to the permit issued by the state, local, or
tribal agency responsible for regulating the landfill.
    (2) The maximum design capacity of the landfill. Where the maximum
design capacity is specified in the permit issued by the state, local,
or tribal agency responsible for regulating the landfill, a copy of the
permit specifying the maximum design capacity may be submitted as part
of the report. If the maximum design capacity of the landfill is not
specified in the permit, the maximum design capacity must be calculated
using good engineering practices. The calculations must be provided,
along with the relevant parameters as part of the report. The landfill
may calculate design capacity in either Mg or m\3\ for comparison with
the exemption values. If the owner or operator chooses to convert the
design capacity from volume to mass or from mass to volume to
demonstrate its design capacity is less than 2.5 million Mg or 2.5
million m\3\, the calculation must include a site-specific density,
which must be recalculated annually. Any density conversions must be
documented and submitted with the design capacity report. The state,
tribal, local agency or Administrator may request other reasonable
information as may be necessary to verify the maximum design capacity
of the landfill.
    (b) Amended design capacity report. An amended design capacity
report must be submitted to the Administrator providing notification of
an increase in the design capacity of the landfill, within 90 days of
an increase in the maximum design capacity of the landfill to meet or
exceed 2.5 million Mg and 2.5 million m\3\. This increase in design
capacity may result from an increase in the permitted volume of the
landfill or an increase in the density as documented in the annual
recalculation required in Sec.  63.1983(f).
    (c) NMOC emission rate report. Each owner or operator subject to
the requirements of this subpart must submit a copy of the latest NMOC
emission rate report that was submitted according to Sec.  60.757(b) of
this chapter or submit an NMOC emission rate report to the
Administrator initially and annually thereafter, except as provided for
in paragraph (c)(1)(ii)(A) of this section. The Administrator may
request such additional information as may be necessary to verify the
reported NMOC emission rate. If you have submitted an annual report
under 40 CFR part 60, subpart WWW; 40 CFR part 60, subpart XXX; or a
Federal plan or EPA-approved and effective state plan or tribal plan
that implements either 40 CFR part 60, subpart Cc or 40 CFR part 60,
subpart Cf, then that submission constitutes compliance with the annual
NMOC emission rate report in this paragraph. You do not need to re-
submit the annual report for the current year. Beginning no later than
September 27, 2021, the report must meet the following requirements:
    (1) The NMOC emission rate report must contain an annual or 5-year
estimate of the NMOC emission rate calculated using the formula and
procedures provided in Sec.  63.1959(a) or (b), as applicable.
    (i) The initial NMOC emission rate report must be submitted no
later than 90 days after the date of commenced construction,
modification, or reconstruction for landfills that commence
construction, modification, or reconstruction on or after March 12,
1996.
    (ii) Subsequent NMOC emission rate reports must be submitted
annually thereafter, except as provided for in paragraph (c)(1)(ii)(A)
of this section.
    (A) If the estimated NMOC emission rate as reported in the annual
report to the Administrator is less than 50 Mg/yr in each of the next 5
consecutive years, the owner or operator may elect to submit, an
estimate of the NMOC emission rate for the next 5-year period in lieu
of the annual report. This estimate must include the current amount of
solid waste-in-place and the estimated waste acceptance rate for each
year of the 5 years for which an NMOC emission rate is estimated. All
data and calculations upon which this estimate is based must be
provided to the Administrator. This estimate must be revised at least
once every 5 years. If the actual waste acceptance rate exceeds the
estimated waste acceptance rate in any year reported in the 5-year
estimate, a revised 5-year estimate must be submitted to the
Administrator. The revised estimate must cover the 5-year period
beginning with the year in which the actual waste acceptance rate
exceeded the estimated waste acceptance rate.
    (B) The report must be submitted following the procedure specified
in paragraph (l)(2) of this section.
    (2) The NMOC emission rate report must include all the data,
calculations, sample reports and measurements used to estimate the
annual or 5-year emissions.
    (3) Each owner or operator subject to the requirements of this
subpart is exempted from the requirements to submit an NMOC emission
rate report, after installing a collection and control system that
complies with Sec.  63.1959(b)(2), during such time as the collection
and control system is in operation and in compliance with Sec. Sec.
63.1958 and 63.1960.
    (d) Collection and control system design plan. Each owner or
operator

subject to the provisions of Sec.  63.1959(b)(2) must submit a
collection and control system design plan to the Administrator for
approval according to Sec.  60.757(c) of this chapter and the schedule
in Sec.  60.757(c)(1) and (2). Beginning no later than September 27,
2021, each owner or operator subject to the provisions of Sec.
63.1959(b)(2) must submit a collection and control system design plan
to the Administrator according to paragraphs (d)(1) through (6) of this
section. The collection and control system design plan must be prepared
and approved by a professional engineer.
    (1) The collection and control system as described in the design
plan must meet the design requirements in Sec.  63.1959(b)(2).
    (2) The collection and control system design plan must include any
alternatives to the operational standards, test methods, procedures,
compliance measures, monitoring, recordkeeping or reporting provisions
of Sec. Sec.  63.1957 through 63.1983 proposed by the owner or
operator.
    (3) The collection and control system design plan must either
conform with specifications for active collection systems in Sec.
63.1962 or include a demonstration to the Administrator's satisfaction
of the sufficiency of the alternative provisions to Sec.  63.1962.
    (4) Each owner or operator of an MSW landfill affected by this
subpart must submit a collection and control system design plan to the
Administrator for approval within 1 year of becoming subject to this
subpart.
    (5) The landfill owner or operator must notify the Administrator
that the design plan is completed and submit a copy of the plan's
signature page. The Administrator has 90 days to decide whether the
design plan should be submitted for review. If the Administrator
chooses to review the plan, the approval process continues as described
in paragraph (d)(6) of this section. In the event that the design plan
is required to be modified to obtain approval, the owner or operator
must take any steps necessary to conform any prior actions to the
approved design plan and any failure to do so could result in an
enforcement action.
    (6) Upon receipt of an initial or revised design plan, the
Administrator must review the information submitted under paragraphs
(d)(1) through (3) of this section and either approve it, disapprove
it, or request that additional information be submitted. Because of the
many site-specific factors involved with landfill gas system design,
alternative systems may be necessary. A wide variety of system designs
are possible, such as vertical wells, combination horizontal and
vertical collection systems, or horizontal trenches only, leachate
collection components, and passive systems.
    (e) Revised design plan. Beginning no later than September 27,
2021, the owner or operator who has already been required to submit a
design plan under paragraph (d) of this section must submit a revised
design plan to the Administrator for approval as follows:
    (1) At least 90 days before expanding operations to an area not
covered by the previously approved design plan.
    (2) Prior to installing or expanding the gas collection system in a
way that is not consistent with the design plan that was submitted to
the Administrator according to paragraph (d) of this section.
    (f) Closure report. Each owner or operator of a controlled landfill
must submit a closure report to the Administrator within 30 days of
waste acceptance cessation. The Administrator may request additional
information as may be necessary to verify that permanent closure has
taken place in accordance with the requirements of Sec.  258.60 of this
chapter. If a closure report has been submitted to the Administrator,
no additional wastes may be placed into the landfill without filing a
notification of modification as described under Sec.  63.9(b) of
subpart A.
    (g) Equipment removal report. Each owner or operator of a
controlled landfill must submit an equipment removal report as provided
in Sec.  60.757(e) of this chapter. Each owner or operator of a
controlled landfill must submit an equipment removal report to the
Administrator 30 days prior to removal or cessation of operation of the
control equipment.
    (1) Beginning no later than September 27, 2021, the equipment
removal report must contain all of the following items:
    (i) A copy of the closure report submitted in accordance with
paragraph (f) of this section;
    (ii) A copy of the initial performance test report demonstrating
that the 15-year minimum control period has expired, or information
that demonstrates that the gas collection and control system will be
unable to operate for 15 years due to declining gas flows. In the
equipment removal report, the process unit(s) tested, the pollutant(s)
tested, and the date that such performance test was conducted may be
submitted in lieu of the performance test report if the report has been
previously submitted to the EPA's Central Data Exchange (CDX); and
    (iii) Dated copies of three successive NMOC emission rate reports
demonstrating that the landfill is no longer producing 50 Mg or greater
of NMOC per year. If the NMOC emission rate reports have been
previously submitted to the EPA's CDX, a statement that the NMOC
emission rate reports have been submitted electronically and the dates
that the reports were submitted to the EPA's CDX may be submitted in
the equipment removal report in lieu of the NMOC emission rate reports.
    (2) The Administrator may request such additional information as
may be necessary to verify that all of the conditions for removal in
Sec.  63.1957(b) have been met.
    (h) Semi-annual report. The owner or operator of a landfill seeking
to comply with Sec.  63.1959(b)(2) using an active collection system
designed in accordance with Sec.  63.1959(b)(2)(ii) must submit to the
Administrator semi-annual reports. Beginning no later than September
27, 2021, you must submit the report, following the procedure specified
in paragraph (l) of this section. The initial report must be submitted
within 180 days of installation and startup of the collection and
control system and must include the initial performance test report
required under Sec.  63.7 of subpart A, as applicable. In the initial
report, the process unit(s) tested, the pollutant(s) tested, and the
date that such performance test was conducted may be submitted in lieu
of the performance test report if the report has been previously
submitted to the EPA's CDX. For enclosed combustion devices and flares,
reportable exceedances are defined under Sec.  63.1983(c). The semi-
annual reports must contain the information in paragraphs (h)(1)
through (8) of this section.
    (1) Number of times that applicable parameters monitored under
Sec.  63.1958(b), (c), and (d) were exceeded and when the gas
collection and control system was not operating under Sec.  63.1958(e),
including periods of SSM. For each instance, report the date, time, and
duration of each exceedance.
    (i) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with the temperature and
nitrogen or oxygen operational standards in introductory paragraph
Sec.  63.1958(c), provide a statement of the wellhead operational
standard for temperature and oxygen you are complying with for the
period covered by the report. Indicate the number of times each of
those parameters monitored under Sec.  63.1961(a)(3) were exceeded. For
each instance, report the date, time, and duration of each exceedance.

    (ii) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with the operational standard
for temperature in Sec.  63.1958(c)(1), provide a statement of the
wellhead operational standard for temperature and oxygen you are
complying with for the period covered by the report. Indicate the
number of times each of those parameters monitored under Sec.
63.1961(a)(4) were exceeded. For each instance, report the date, time,
and duration of each exceedance.
    (iii) Beginning no later than September 27, 2021, number of times
the parameters for the site-specific treatment system in Sec.
63.1961(g) were exceeded.
    (2) Description and duration of all periods when the gas stream was
diverted from the control device or treatment system through a bypass
line or the indication of bypass flow as specified under Sec.  63.1961.
    (3) Description and duration of all periods when the control device
or treatment system was not operating and length of time the control
device or treatment system was not operating.
    (4) All periods when the collection system was not operating.
    (5) The location of each exceedance of the 500-ppm methane
concentration as provided in Sec.  63.1958(d) and the concentration
recorded at each location for which an exceedance was recorded in the
previous month. Beginning no later than September 27, 2021, for
location, you record the latitude and longitude coordinates of each
exceedance using an instrument with an accuracy of at least 4 meters.
The coordinates must be in decimal degrees with at least five decimal
places.
    (6) The date of installation and the location of each well or
collection system expansion added pursuant to Sec.  63.1960(a)(3) and
(4), (b), and (c)(4).
    (7) For any corrective action analysis for which corrective actions
are required in Sec.  63.1960(a)(3)(i) or (a)(5) and that take more
than 60 days to correct the exceedance, the root cause analysis
conducted, including a description of the recommended corrective
action(s), the date for corrective action(s) already completed
following the positive pressure or high temperature reading, and, for
action(s) not already completed, a schedule for implementation,
including proposed commencement and completion dates.
    (8) Each owner or operator required to conduct enhanced monitoring
in Sec. Sec.  63.1961(a)(5) and (6) must include the results of all
monitoring activities conducted during the period.
    (i) For each monitoring point, report the date, time, and well
identifier along with the value and units of measure for oxygen,
temperature (wellhead and downwell), methane, and carbon monoxide.
    (ii) Include a summary trend analysis for each well subject to the
enhanced monitoring requirements to chart the weekly readings over time
for oxygen, wellhead temperature, methane, and weekly or monthly
readings over time, as applicable for carbon monoxide.
    (iii) Include the date, time, staff person name, and description of
findings for each visual observation for subsurface oxidation event.
    (i) Initial performance test report. Each owner or operator seeking
to comply with Sec.  63.1959(b)(2)(iii) must include the following
information with the initial performance test report required under
Sec.  63.7 of subpart A:
    (1) A diagram of the collection system showing collection system
positioning including all wells, horizontal collectors, surface
collectors, or other gas extraction devices, including the locations of
any areas excluded from collection and the proposed sites for the
future collection system expansion;
    (2) The data upon which the sufficient density of wells, horizontal
collectors, surface collectors, or other gas extraction devices and the
gas mover equipment sizing are based;
    (3) The documentation of the presence of asbestos or nondegradable
material for each area from which collection wells have been excluded
based on the presence of asbestos or nondegradable material;
    (4) The sum of the gas generation flow rates for all areas from
which collection wells have been excluded based on nonproductivity and
the calculations of gas generation flow rate for each excluded area;
    (5) The provisions for increasing gas mover equipment capacity with
increased gas generation flow rate, if the present gas mover equipment
is inadequate to move the maximum flow rate expected over the life of
the landfill; and
    (6) The provisions for the control of off-site migration.
    (j) Corrective action and the corresponding timeline. The owner or
operator must submit information regarding corrective actions according
to paragraphs (j)(1) and (2) of this section.
    (1) For corrective action that is required according to Sec.
63.1960(a)(3) or (4) and is not completed within 60 days after the
initial exceedance, you must submit a notification to the Administrator
as soon as practicable but no later than 75 days after the first
measurement of positive pressure or temperature exceedance.
    (2) For corrective action that is required according to Sec.
63.1960(a)(3) or (4) and is expected to take longer than 120 days after
the initial exceedance to complete, you must submit the root cause
analysis, corrective action analysis, and corresponding implementation
timeline to the Administrator as soon as practicable but no later than
75 days after the first measurement of positive pressure or temperature
monitoring value of 62.8 degrees Celsius (145 degrees Fahrenheit) or
above. The Administrator must approve the plan for corrective action
and the corresponding timeline.
    (k) 24-hour high temperature report. Where an owner or operator
subject to the provisions of this subpart seeks to demonstrate
compliance with the operational standard for temperature in Sec.
63.1958(c)(1) and a landfill gas temperature measured at either the
wellhead or at any point in the well is greater than or equal to 76.7
degrees Celsius (170 degrees Fahrenheit) and the carbon monoxide
concentration measured is greater than or equal to 1,000 ppmv, then you
must report the date, time, well identifier, temperature and carbon
monoxide reading via email to the Administrator within 24 hours of the
measurement unless a higher operating temperature value has been
approved by the Administrator for the well under this subpart or under
40 CFR part 60, subpart WWW; 40 CFR part 60, subpart XXX; or a Federal
plan or EPA approved and effective state plan or tribal plan that
implements either 40 CFR part 60, subpart Cc or 40 CFR part 60, subpart
Cf.
    (l) Electronic reporting. Beginning no later than September 27,
2021, the owner or operator must submit reports electronically
according to paragraphs (l)(1) and (2) of this section.
    (1) Within 60 days after the date of completing each performance
test required by this subpart, you must submit the results of the
performance test following the procedures specified in paragraphs
(l)(1)(i) through (iii) of this section.
    (i) Data collected using test methods supported by the EPA's
Electronic Reporting Tool (ERT) as listed on the EPA's ERT website
(https://www.epa.gov/electronic-reporting-air-emissions/electronic-reporting-tool-ert) at the time of the test. Submit the results of the
performance test to the EPA via the Compliance and Emissions Data
Reporting Interface (CEDRI), which can be accessed through the EPA's
CDX (https://cdx.epa.gov/). The data must be submitted in a file format
generated

through the use of the EPA's ERT. Alternatively, you may submit an
electronic file consistent with the extensible markup language (XML)
schema listed on the EPA's ERT website.
    (ii) Data collected using test methods that are not supported by
the EPA's ERT as listed on the EPA's ERT website at the time of the
test. The results of the performance test must be included as an
attachment in the ERT or an alternate electronic file consistent with
the XML schema listed on the EPA's ERT website. Submit the ERT
generated package or alternative file to the EPA via CEDRI.
    (iii) Confidential business information (CBI). If you claim some of
the information submitted under paragraph (a) of this section is CBI,
you must submit a complete file, including information claimed to be
CBI, to the EPA. The file must be generated through the use of the
EPA's ERT or an alternate electronic file consistent with the XML
schema listed on the EPA's ERT website. Submit the file on a compact
disc, flash drive, or other commonly used electronic storage medium and
clearly mark the medium as CBI. Mail the electronic medium to U.S. EPA/
OAQPS/CORE CBI Office, Attention: Group Leader, Measurement Policy
Group, MD C404-02, 4930 Old Page Rd., Durham, NC 27703. The same file
with the CBI omitted must be submitted to the EPA via the EPA's CDX as
described in paragraph (l)(1)(i) of this section.
    (2) Each owner or operator required to submit reports following the
procedure specified in this paragraph must submit reports to the EPA
via CEDRI. CEDRI can be accessed through the EPA's CDX. The owner or
operator must use the appropriate electronic report in CEDRI for this
subpart or an alternate electronic file format consistent with the XML
schema listed on the CEDRI website (https://www.epa.gov/electronic-reporting-air-emissions/compliance-and-emissions-data-reporting-interface-cedri). Once the spreadsheet template upload/forms for the
reports have been available in CEDRI for 90 days, the owner or operator
must begin submitting all subsequent reports via CEDRI. The reports
must be submitted by the deadlines specified in this subpart,
regardless of the method in which the reports are submitted. The NMOC
emission rate reports, semi-annual reports, and bioreactor 40-percent
moisture reports should be electronically reported as a spreadsheet
template upload/form to CEDRI. If the reporting forms specific to this
subpart are not available in CEDRI at the time that the reports are
due, the owner or operator must submit the reports to the Administrator
at the appropriate address listed in Sec.  63.13 of subpart A.
    (m) Claims of EPA system outage. Beginning no later than September
27, 2021, if you are required to electronically submit a report through
CEDRI in the EPA's CDX, you may assert a claim of EPA system outage for
failure to comply timely with the reporting requirement. To assert a
claim of EPA system outage, you must meet the following requirements:
    (1) You must have been or will be precluded from accessing CEDRI
and submitting a required report within the time prescribed due to an
outage of either the EPA's CEDRI or CDX systems.
    (2) The outage must have occurred within the period of time
beginning 5 business days prior to the date that the submission is due.
    (3) The outage may be planned or unplanned.
    (4) You must submit notification to the Administrator in writing as
soon as possible following the date you first knew, or through due
diligence should have known, that the event may cause or has caused a
delay in reporting.
    (5) You must provide to the Administrator a written description
identifying:
    (i) The date(s) and time(s) when CDX or CEDRI was accessed and the
system was unavailable;
    (ii) A rationale for attributing the delay in reporting beyond the
regulatory deadline to EPA system outage;
    (iii) Measures taken or to be taken to minimize the delay in
reporting; and
    (iv) The date by which you propose to report, or if you have
already met the reporting requirement at the time of the notification,
the date you reported.
    (6) The decision to accept the claim of EPA system outage and allow
an extension to the reporting deadline is solely within the discretion
of the Administrator.
    (7) In any circumstance, the report must be submitted
electronically as soon as possible after the outage is resolved.
    (n) Claims of force majeure. Beginning no later than September 2,
2021, if you are required to electronically submit a report through
CEDRI in the EPA's CDX, you may assert a claim of force majeure for
failure to comply timely with the reporting requirement. To assert a
claim of force majeure, you must meet the following requirements:
    (1) You may submit a claim if a force majeure event is about to
occur, occurs, or has occurred or there are lingering effects from such
an event within the period of time beginning 5 business days prior to
the date the submission is due. For the purposes of this section, a
force majeure event is defined as an event that will be or has been
caused by circumstances beyond the control of the affected facility,
its contractors, or any entity controlled by the affected facility that
prevents you from complying with the requirement to submit a report
electronically within the time period prescribed. Examples of such
events are acts of nature (e.g., hurricanes, earthquakes, or floods),
acts of war or terrorism, or equipment failure or safety hazard beyond
the control of the affected facility (e.g., large scale power outage).
    (2) You must submit notification to the Administrator in writing as
soon as possible following the date you first knew, or through due
diligence should have known, that the event may cause or has caused a
delay in reporting.
    (3) You must provide to the Administrator:
    (i) A written description of the force majeure event;
    (ii) A rationale for attributing the delay in reporting beyond the
regulatory deadline to the force majeure event;
    (iii) Measures taken or to be taken to minimize the delay in
reporting; and
    (iv) The date by which you propose to report, or if you have
already met the reporting requirement at the time of the notification,
the date you reported.
    (4) The decision to accept the claim of force majeure and allow an
extension to the reporting deadline is solely within the discretion of
the Administrator.
    (5) In any circumstance, the reporting must occur as soon as
possible after the force majeure event occurs.

Sec.  63.1982  What records and reports must I submit and keep for
bioreactors or liquids addition other than leachate?

    Submit reports as specified in this section and Sec.  63.1981. Keep
records as specified in this section and Sec.  63.1983.
    (a) For bioreactors at new affected sources you must submit the
initial semi-annual compliance report and performance test results
described in Sec.  63.1981(h) within 180 days after the date you are
required to begin operating the gas collection and control system by
Sec.  63.1947(a)(2).
    (b) If you must submit a semi-annual compliance report for a
bioreactor as well as a semi-annual compliance report for a
conventional portion of the same landfill, you may delay submittal of a
subsequent semi-annual compliance report for the bioreactor according
to paragraphs (b)(1) through (3) of this section so that the reports
may be submitted on the same schedule.

    (1) After submittal of your initial semi-annual compliance report
and performance test results for the bioreactor, you may delay
submittal of the subsequent semi-annual compliance report for the
bioreactor until the date the initial or subsequent semi-annual
compliance report is due for the conventional portion of your landfill.
    (2) You may delay submittal of your subsequent semi-annual
compliance report by no more than 12 months after the due date for
submitting the initial semi-annual compliance report and performance
test results described in Sec.  63.1981(h) for the bioreactor. The
report must cover the time period since the previous semi-annual report
for the bioreactor, which would be a period of at least 6 months and no
more than 12 months.
    (3) After the delayed semi-annual report, all subsequent semi-
annual reports for the bioreactor must be submitted every 6 months on
the same date the semi-annual report for the conventional portion of
the landfill is due.
    (c) If you add any liquids other than leachate in a controlled
fashion to the waste mass and do not comply with the bioreactor
requirements in Sec. Sec.  63.1947, 63.1955(b), and paragraphs (a) and
(b) of this section, you must keep a record of calculations showing
that the percent moisture by weight expected in the waste mass to which
liquid is added is less than 40 percent. The calculation must consider
the waste mass, moisture content of the incoming waste, mass of water
added to the waste including leachate recirculation and other liquids
addition and precipitation, and the mass of water removed through
leachate or other water losses. Moisture level sampling or mass
balances calculations can be used. You must document the calculations
and the basis of any assumptions. Keep the record of the calculations
until you cease liquids addition.
    (d) If you calculate moisture content to establish the date your
bioreactor is required to begin operating the collection and control
system under Sec.  63.1947(a)(2) or (c)(2), keep a record of the
calculations including the information specified in paragraph (e) of
this section for 5 years. Within 90 days after the bioreactor achieves
40-percent moisture content, report the results of the calculation, the
date the bioreactor achieved 40-percent moisture content by weight, and
the date you plan to begin collection and control system operation to
the Administrator. Beginning no later than September 27, 2021, the
reports should be submitted following the procedure specified in Sec.
63.1981(l)(2).

Sec.  63.1983  What records must I keep?

    You must keep records as specified in this subpart. You must also
keep records as specified in the general provisions of 40 CFR part 63
as shown in Table 1 to this subpart.
    (a) Except as provided in Sec.  63.1981(d)(2), each owner or
operator of an MSW landfill subject to the provisions of Sec.
63.1959(b)(2)(ii) and (iii) of this chapter must keep for at least 5
years up-to-date, readily accessible, on-site records of the design
capacity report that triggered Sec.  63.1959(b), the current amount of
solid waste in-place, and the year-by-year waste acceptance rate. Off-
site records may be maintained if they are retrievable within 4 hours.
Either paper copy or electronic formats are acceptable.
    (b) Except as provided in Sec.  63.1981(d)(2), each owner or
operator of a controlled landfill must keep up-to-date, readily
accessible records for the life of the control system equipment of the
data listed in paragraphs (b)(1) through (5) of this section as
measured during the initial performance test or compliance
determination. Records of subsequent tests or monitoring must be
maintained for a minimum of 5 years. Records of the control device
vendor specifications must be maintained until removal.
    (1) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with Sec.  63.1959(b)(2)(ii):
    (i) The maximum expected gas generation flow rate as calculated in
Sec.  63.1960(a)(1).
    (ii) The density of wells, horizontal collectors, surface
collectors, or other gas extraction devices determined using the
procedures specified in Sec.  63.1962(a)(1) and (2).
    (2) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with Sec.  63.1959(b)(2)(iii)
through use of an enclosed combustion device other than a boiler or
process heater with a design heat input capacity equal to or greater
than 44 megawatts:
    (i) The average temperature measured at least every 15 minutes and
averaged over the same time period of the performance test.
    (ii) The percent reduction of NMOC determined as specified in Sec.
63.1959(b)(2)(iii)(B) achieved by the control device.
    (3) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with Sec.
63.1959(b)(2)(iii)(B)(1) through use of a boiler or process heater of
any size: A description of the location at which the collected gas vent
stream is introduced into the boiler or process heater over the same
time period of the performance testing.
    (4) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with Sec.
63.1959(b)(2)(iii)(A) through use of a non-enclosed flare, the flare
type (i.e., steam-assisted, air-assisted, or nonassisted), all visible
emission readings, heat content determination, flow rate or bypass flow
rate measurements, and exit velocity determinations made during the
performance test as specified in Sec.  63.11; continuous records of the
flare pilot flame or flare flame monitoring and records of all periods
of operations during which the pilot flame or the flare flame is
absent.
    (5) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with Sec.
63.1959(b)(2)(iii)(C) through use of a landfill gas treatment system:
    (i) Bypass records. Records of the flow of landfill gas to, and
bypass of, the treatment system.
    (ii) Site-specific treatment monitoring plan. Beginning no later
than September 27, 2021, the owner or operator must prepare a site-
specific treatment monitoring plan to include:
    (A) Monitoring records of parameters that are identified in the
treatment system monitoring plan and that ensure the treatment system
is operating properly for each intended end use of the treated landfill
gas. At a minimum, records should include records of filtration, de-
watering, and compression parameters that ensure the treatment system
is operating properly for each intended end use of the treated landfill
gas.
    (B) Monitoring methods, frequencies, and operating ranges for each
monitored operating parameter based on manufacturer's recommendations
or engineering analysis for each intended end use of the treated
landfill gas.
    (C) Documentation of the monitoring methods and ranges, along with
justification for their use.
    (D) List of responsible staff (by job title) for data collection.
    (E) Processes and methods used to collect the necessary data.
    (F) Description of the procedures and methods that are used for
quality assurance, maintenance, and repair of all continuous monitoring
systems (CMS).
    (c) Except as provided in Sec.  63.1981(d)(2), each owner or
operator of a controlled landfill subject to the

provisions of this subpart must keep for 5 years up-to-date, readily
accessible continuous records of the equipment operating parameters
specified to be monitored in Sec.  63.1961 as well as up-to-date,
readily accessible records for periods of operation during which the
parameter boundaries established during the most recent performance
test are exceeded.
    (1) The following constitute exceedances that must be recorded and
reported under Sec.  63.1981(h):
    (i) For enclosed combustors except for boilers and process heaters
with design heat input capacity of 44 megawatts (150 million Btu per
hour) or greater, all 3-hour periods of operation during which the
average temperature was more than 28 degrees Celsius (82 degrees
Fahrenheit) below the average combustion temperature during the most
recent performance test at which compliance with Sec.
63.1959(b)(2)(iii) was determined.
    (ii) For boilers or process heaters, whenever there is a change in
the location at which the vent stream is introduced into the flame zone
as required under paragraph (b)(3) of this section.
    (2) Each owner or operator subject to the provisions of this
subpart must keep up-to-date, readily accessible continuous records of
the indication of flow to the control system and the indication of
bypass flow or records of monthly inspections of car-seals or lock-and-
key configurations used to seal bypass lines, specified under Sec.
63.1961(b)(2)(ii), (c)(2)(ii), and (g)(2).
    (3) Each owner or operator subject to the provisions of this
subpart who uses a boiler or process heater with a design heat input
capacity of 44 megawatts or greater to comply with Sec.
63.1959(b)(2)(iii) must keep an up-to-date, readily accessible record
of all periods of operation of the boiler or process heater. Examples
of such records could include records of steam use, fuel use, or
monitoring data collected pursuant to other state, local, tribal, or
federal regulatory requirements.
    (4) Each owner or operator seeking to comply with the provisions of
this subpart by use of a non-enclosed flare must keep up-to-date,
readily accessible continuous records of the flame or flare pilot flame
monitoring specified under Sec.  63.1961(c), and up-to-date, readily
accessible records of all periods of operation in which the flame or
flare pilot flame is absent.
    (5) Each owner or operator of a landfill seeking to comply with
Sec.  63.1959(b)(2) using an active collection system designed in
accordance with Sec.  63.1959(b)(2)(ii) must keep records of periods
when the collection system or control device is not operating.
    (6) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with the operational standard
in Sec.  63.1958(e)(1), the date, time, and duration of each startup
and/or shutdown period, recording the periods when the affected source
was subject to the standard applicable to startup and shutdown.
    (7) Where an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with the operational standard
in Sec.  63.1958(e)(1), in the event that an affected unit fails to
meet an applicable standard, record the information below in this
paragraph:
    (i) For each failure record the date, time and duration of each
failure and the cause of such events (including unknown cause, if
applicable).
    (ii) For each failure to meet an applicable standard; record and
retain a list of the affected sources or equipment.
    (iii) Record actions taken to minimize emissions in accordance with
the general duty of Sec.  63.1955(c) and any corrective actions taken
to return the affected unit to its normal or usual manner of operation.
    (8) Beginning no later than September 27, 2021, in lieu of the
requirements specified in Sec.  [thinsp]63.8(d)(3) of subpart A you
must keep the written procedures required by Sec.  [thinsp]63.8(d)(2)
on record for the life of the affected source or until the affected
source is no longer subject to the provisions of this part, to be made
available for inspection, upon request, by the Administrator. If the
performance evaluation plan is revised, you must keep previous (i.e.,
superseded) versions of the performance evaluation plan on record to be
made available for inspection, upon request, by the Administrator, for
a period of 5 years after each revision to the plan. The program of
corrective action should be included in the plan required under Sec.
[thinsp]63.8(d)(2).
    (d) Except as provided in Sec.  63.1981(d)(2), each owner or
operator subject to the provisions of this subpart must keep for the
life of the collection system an up-to-date, readily accessible plot
map showing each existing and planned collector in the system and
providing a unique identification location label for each collector.
    (1) Each owner or operator subject to the provisions of this
subpart must keep up-to-date, readily accessible records of the
installation date and location of all newly installed collectors as
specified under Sec.  63.1960(b).
    (2) Each owner or operator subject to the provisions of this
subpart must keep readily accessible documentation of the nature, date
of deposition, amount, and location of asbestos-containing or
nondegradable waste excluded from collection as provided in Sec.
63.1962(a)(3)(i) as well as any nonproductive areas excluded from
collection as provided in Sec.  63.1962(a)(3)(ii).
    (e) Except as provided in Sec.  63.1981(d)(2), each owner or
operator subject to the provisions of this subpart must keep for at
least 5 years up-to-date, readily accessible records of the following:
    (1) All collection and control system exceedances of the
operational standards in Sec.  63.1958, the reading in the subsequent
month whether or not the second reading is an exceedance, and the
location of each exceedance.
    (2) Each owner or operator subject to the control provisions of
this subpart must keep records of each wellhead temperature monitoring
value of greater than 55 degrees Celsius (131 degrees Fahrenheit), each
wellhead nitrogen level at or above 20 percent, and each wellhead
oxygen level at or above 5 percent, except:
    (i) When an owner or operator subject to the provisions of this
subpart seeks to demonstrate compliance with the compliance provisions
for wellhead temperature in Sec.  63.1958(c)(1), but no later than
September 27, 2021, the records of each wellhead temperature monitoring
value of 62.8 degrees Celsius (145 degrees Fahrenheit) or above instead
of values greater than 55 degrees Celsius (131 degrees Fahrenheit).
    (ii) Each owner or operator required to conduct the enhanced
monitoring provisions in Sec.  63.1961(a)(5), must also keep records of
all enhanced monitoring activities.
    (iii) Each owner or operator required to submit the 24-hour high
temperature report in Sec.  63.1981(k), must also keep a record of the
email transmission.
    (3) For any root cause analysis for which corrective actions are
required in Sec.  63.1960(a)(3)(i)(A) or (a)(4)(i)(A), keep a record of
the root cause analysis conducted, including a description of the
recommended corrective action(s) taken, and the date(s) the corrective
action(s) were completed.
    (4) For any root cause analysis for which corrective actions are
required in Sec.  63.1960(a)(3)(i)(B) or (a)(4)(i)(B), keep a record of
the root cause analysis conducted, the corrective action analysis, the
date for corrective action(s) already completed following the

positive pressure reading or high temperature reading, and, for
action(s) not already completed, a schedule for implementation,
including proposed commencement and completion dates.
    (5) For any root cause analysis for which corrective actions are