S.D. Admin. R. 74:36:07:103

Current through Register Vol. 51, page 67, December 16, 2024

Section 74:36:07:103 - Tier 4 nonmethane organic compound emission rate for existing municipal solid waste landfills

Tier 4 is allowed only if the owner or operator can demonstrate that nonmethane organic compound emissions are greater than or equal to 34 megagrams per year but less than 50 megagrams per year using Tier 1 or Tier 2. If both Tier 1 and Tier 2 indicate nonmethane organic compound emissions are 50 megagrams per year or greater, Tier 4 cannot be used and the owner or operator must meet the criteria in subdivision (8) of this section. If Tier 4 is being used, the owner or operator shall demonstrate that surface methane emissions are below 500 parts per million. Surface emission monitoring shall be conducted on a quarterly basis using the following procedures:

(1) The owner or operator shall measure surface concentrations of methane along the entire perimeter of the landfill and along a pattern that traverses the landfill at no more than 30-meter intervals using an organic vapor analyzer, flame ionization detector, or other portable monitor meeting the specifications provided in § 74:36:07:115;

(2) The background concentration shall be determined by moving the probe inlet upwind and downwind at least 30 meters from the waste mass boundary of the landfill;

(3) Surface emission monitoring shall be performed in accordance with 40 C.F.R. Part 60, Appendix A, Method 21, section 8.3.1 (July 1, 2018), except the probe inlet shall be placed no more than 5 centimeters above the landfill surface. The constant measurement of distance above the surface should be based on a mechanical device:

(a) The owner or operator shall use a wind barrier when onsite average wind speed exceeds four miles per hour or two meters per second or gust exceed 10 miles per hour. Average on-site wind speed shall be determined in an open area at 5-minute intervals using an on-site anemometer with a continuous recorder and data logger for the entire duration of the monitoring event. The wind barrier shall surround the surface emission monitor and placed on the ground to ensure wind turbulence is blocked. Surface emission monitoring cannot be conducted if average wind speed exceeds 25 miles per hour; and

(b) Landfill surface areas where visual observations indicate elevated concentrations of landfill gas and all cover penetrations shall be monitored using a device meeting the specifications provided in § 74:36:07:115;

(4) Each owner or operator seeking to comply with the Tier 4 provisions in subdivision (6) of this section shall maintain records of surface emission monitoring and submit a Tier 4 surface emissions report;

(5) If there is any measured concentration of methane of 500 parts per million or greater from the surface of the landfill, the owner or operator shall submit a gas collection and control system design plan within one year of the first measured concentration of methane of 500 parts per million or greater from the surface of the landfill and install and operate a gas collection and control system according to §§ 74:36:07:106 and § 74:36:07:109 within 30 months of the most recent nonmethane organic compound emission rate report in which the nonmethane organic compound emission rate equals or exceeds 34 megagrams per year based on Tier 2;

(6) If after four consecutive quarterly monitoring periods at a landfill, other than a closed landfill, there is no measured concentration of methane of 500 parts per million or greater from the surface of the landfill, the owner or operator shall continue quarterly surface emission monitoring;

(7) If after four consecutive quarterly monitoring periods at a closed landfill there is no measured concentration of methane of 500 parts per million or greater from the surface of the landfill, the owner or operator shall conduct annual surface emission monitoring; and

(8) If a landfill has installed and operates a collection and control system that is not required, then the collection and control system shall meet the following criteria:

(a) The gas collection and control system shall have operated for at least 6,570 out of 8,760 hours preceding the Tier 4 surface emissions monitoring demonstration; and

(b) During the Tier 4 surface emissions monitoring demonstration, the gas collection and control system shall operate as it normally would to collect and control as much landfill gas as possible.

S.D. Admin. R. 74:36:07:103

46 SDR 064, effective 11/25/2019

General Authority: SDCL 34A-1-6.

Law Implemented: SDCL 34A-1-18.