S.D. Admin. R. 74:36:07:112

Current through Register Vol. 51, page 56, November 4, 2024

Section 74:36:07:112 - Existing municipal solid waste landfill compliance provisions for gas collection system

The owner or operator of an existing municipal solid waste landfill that meets the requirements of § 74:36:07:105 shall determine if the gas collection system is in compliance with subdivision 74:36:07:107(1) based on the following, except as provided in subdivision 74:36:07:126(2):

(1) For the purpose of calculating the maximum expected gas generation flow rate from the landfill to determine compliance with subdivision 74:36:07:107(1)(a), use the appropriate equation:

(a) For sites with unknown year-to-year solid waste acceptance rate use the following equation:

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(b) For sites with known year-to-year solid waste acceptance rate use the following equation:

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Q_m = Maximum expected gas generation flow rate, cubic meters per year;

L_o = Methane generation potential, cubic meters per megagram solid waste;

R = Average annual acceptance rate, megagrams per year;

M_i = Mass of solid waste in the i^th section, megagrams;

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; and

ti = Age of the i^th section, years.

The methane generation rate constant and methane generation potential kinetic factors should be those published in EPAs AP-42, Fifth Edition, Compilation of Air Pollutant Emission Factors, Volume 1: Stationary Point and Area Sources (January 1995) or other site-specific values demonstrated to be appropriate and approved by the Secretary. If the methane generation rate constant has been determined as specified in § 74:36:07:102, the value of the methane generation rate constant determined from the test shall be used. A value of no more than 15 years shall 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;

(c) 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, the appropriate equation in subdivision (a) and (b) 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 the appropriate equation in subdivision (a) and (b) of this section or other methods shall 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 subdivision 74:36:07:107(1)(b), the owner or operator shall design a system of vertical wells, horizontal collectors, or other collection devices, satisfactory to the Secretary,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 subdivision 74:36:07:107(1)(c), the owner or operator shall measure gauge pressure in the gas collection header applied to each individual well monthly. If a positive pressure exists, action shall be initiated to correct the exceedance within five calendar days, except for the three conditions allowed under subdivision 74:36:07:111(2). Any attempted corrective measure shall not cause exceedances of other operational or performance standards. Corrective actions to achieve a negative pressure shall meet the following schedule:

(a) If negative pressure cannot be achieved without excess air infiltration within 15 calendar days of the first measurement of positive pressure, the owner or operator shall conduct a root cause analysis and correct the exceedance as soon as practicable, but not later than 60 days after positive pressure was first measured. The owner or operator shall keep records according to subdivision 74:36:07:134(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 shall 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 shall submit the items listed in subdivision 74:36:07:140(7) as part of the next annual report. The owner or operator shall keep records according to subdivision 74:36:07:134(4); and

(c) If corrective action is expected to take longer than 120 days to complete after the initial exceedance, the owner or operator shall submit the root cause analysis, corrective action analysis, and corresponding implementation timeline to the Secretary, according to subdivision 74:36:07:140(7) and § 74:36:07:129. The owner or operator shall keep records according to subdivision 74:36:07:134(5).

(4) For the purpose of identifying whether excess air infiltration into the landfill is occurring, the owner or operator shall monitor each well monthly for temperature. If a well exceeds the operating parameter for temperature, action shall be initiated to correct the exceedance within 5 calendar days. Any attempted corrective measure shall not cause exceedances of other operational or performance standards. Corrective actions to achieve the operating parameter for temperature shall meet the following schedule:

(a) If a landfill gas temperature less than 55 degrees Celsius (131 degrees Fahrenheit) cannot be achieved within 15 calendar days of the first measurement of landfill gas temperature greater than 55 degrees Celsius (131 degrees Fahrenheit), the owner or operator shall 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 55 degrees Celsius (131 degrees Fahrenheit) was first measured. The owner or operator shall keep records according to subdivision 74:36:07:134(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 shall 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 55 degrees Celsius (131 degrees Fahrenheit). The owner or operator shall submit the items listed in subdivision 74:36:07:140(7) as part of the next annual report. The owner or operator shall keep records according to subdivision 74:36:07:134(4); and

(5) An owner or operator seeking to demonstrate compliance with subdivision 74:36:07:107(1)(d) through the use of a collection system not conforming to the specifications provided in § 74:36:07:108 shall provide information satisfactory to the Secretary as specified in subdivision 74:36:07:126(3) demonstrating that off-site migration is being controlled.

S.D. Admin. R. 74:36:07:112

46 SDR 064, effective 11/25/2019

General Authority: SDCL 34A-1-6.

Law Implemented: SDCL 34A-1-18.