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Federal Register / Vol. 86, No. 97 / Friday, May 21, 2021 / Rules and Regulations
ii If corrective actions cannot be fully implemented within 60 days following the measurement of landfill gas temperature greater than 55 degrees Celsius 131 degrees Fahrenheit 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 actions as soon as practicable, but no more than 120 days following the measurement of landfill gas temperature greater than 55 degrees Celsius 131
degrees Fahrenheit. The owner or operator must submit the items listed in 62.16724h7 as part of the next annual report. The owner or operator must keep records according to 62.16726e4.
iii 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 62.16724h7 and 62.16724k. The owner or operator must keep records according to 62.16726e5.
5 An owner or operator seeking to demonstrate compliance with 62.16714b2iv through the use of a collection system not conforming to the specifications provided in 62.16728
must provide information satisfactory to the Administrator as specified in 62.16724d3 demonstrating that offsite migration is being controlled.
b For purposes of compliance with 62.16716a, 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 62.16724d. 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 62.16716d:
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 no more than 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.

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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 A7 of 40 CFR part 60, 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 parts per million or more above background at any location must be recorded as a monitored exceedance and the actions specified in paragraphs c4i 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 62.16716d.
i The location of each monitored exceedance must be marked, and the location and concentration recorded.
For location, you must determine the latitude and longitude coordinates 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 remonitored within 10 calendar 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 c4v of this section must be taken, and no further monitoring of that location is required until the action specified in paragraph c4v of this section has been taken.
iv Any location that initially showed an exceedance but has a methane concentration less than 500 parts-permillion methane above background at the 10-day re-monitoring specified in paragraph c4ii or iii of this section must be re-monitored 1 month from the initial exceedance. If the 1-month remonitoring shows a concentration less than 500 parts-per-million above background, no further monitoring of that location is required until the next quarterly monitoring period. If the 1month re-monitoring shows an exceedance, the actions specified in
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paragraph c4iii or v of this section must be taken.
v For any location where monitored methane concentration equals or exceeds 500 parts-per-million above background three times within a quarterly period, a new well or other collection device must be installed within 120 calendar 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 or 62.16718a6 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 A7 of 40 CFR part 60, except that methane replaces all references to VOC.
2 The calibration gas must be methane, diluted to a nominal concentration of 500 parts-per-million in air.
3 To meet the performance evaluation requirements in section 8.1
of EPA Method 21 of appendix A7 of 40 CFR part 60, the instrument evaluation procedures of section 8.1 of EPA Method 21 of appendix A7 of 40
CFR part 60 must be used.
4 The calibration procedures provided in sections 8 and 10 of EPA
Method 21 of appendix A7 of 40 CFR
part 60 must be followed immediately before commencing a surface monitoring survey.
e The provisions of this subpart apply at all times, including periods of startup, shutdown, or malfunction.
During periods of startup, shutdown, and malfunction, you must comply with the work practice specified in 62.16716e in lieu of the compliance provisions in 62.16720.
62.16722

Monitoring of operations.

Follow the monitoring provisions in this section as well as the provisions in 62.16716 and 62.16720, except as provided in 62.16724d2, or the monitoring provisions in 63.1961 of this chapter as well as the provisions in 63.1958 and 63.1960 of this chapter, or both as alternative means of compliance, for an MSW landfill with a gas collection and control system used
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