Mich. Admin. Code R. 299.4433 - Type II landfill operation; explosive gas control and monitoring
Rule 433.
(1) The
owner and operator of a type II landfill shall ensure all of the following:
(a) That the concentration of methane gas
generated by the facility is not more than 25% of the lower explosive limit for
methane in facility structures, excluding gas control or recovery system
components, and the leachate collection system.
(b) That the concentration of methane gas is
not more than the lower explosive limit at or beyond the facility property
boundary.
(c) That gases generated
by the facility do not create a nuisance and are not otherwise in violation of
part 55 of the act at the property boundary.
(2) The owner and operator of a type II
landfill shall implement a routine methane monitoring program to ensure that
the requirements of subrule (1) of this rule are met. The type and frequency of
monitoring shall be based on all of the following factors:
(a) Soil conditions.
(b) The hydrogeologic conditions surrounding
the facility.
(c) The hydraulic
conditions surrounding the facility.
(d) The location of facility structures and
property boundaries.
(3)
The minimum frequency of methane monitoring shall be quarterly.
(4) If methane gas levels exceeding the
limits specified in subrule (1) of this rule are detected from either an active
or closed unit, the owner and operator shall do all of the following:
(a) Immediately take all necessary steps to
ensure protection of human health and notify the director.
(b) Within 7 days of detection, place, in the
operating record, the methane gas levels detected and a description of the
steps taken to protect human health.
(c) Within 60 days of detection, implement a
remediation plan for the methane gas releases, place a copy of the plan in the
operating record, and notify the director that the plan has been implemented.
The plan shall describe the nature and extent of the problem and the proposed
remedy.
(5) The director
may establish alternative schedules for demonstrating compliance under subrule
(4) of this rule.
(6) An active gas
management system shall be installed at a type II landfill if necessary under
subrule (4) of this rule. An active gas management system shall do all of the
following:
(a) Include a control system that
includes 1 or both of the following:
(i) A
system within the unit that is in compliance with subrule (7) of this
rule.
(ii) A system outside the
unit that is in compliance with subrule (8) of this rule.
(b) Include a collection system for
transporting gas to a central point or points for process or
disposal.
(c) Include provisions
for collecting and draining gas condensate to the leachate collection and
removal system.
(d) Prevent the
migration of gas out of the unit.
(e) Operate until the waste is stabilized and
no longer producing gas in quantities that are in violation of subrule (1) or
(4) of this rule.
(7) An
active gas control system that is installed within the perimeter of a solid
waste disposal unit shall be designed and constructed to do the all of the
following:
(a) Function for the active life
of the disposal unit and the postclosure period.
(b) Operate safely in hazardous or explosive
environments.
(c) Be resistant to
corrosion by the constituents of landfill gas.
(d) Withstand all normal landfill conditions,
including settlement.
(e) Provide
for the collection and draining of gas condensate.
(f) Not adversely affect the integrity of any
liner, leachate collection system, or final cover.
(g) Be airtight.
(8) An active gas control system that is
located outside the perimeter of the solid waste disposal unit shall consist of
either trenches or gas wells which effectively cut off the lateral migration of
gas and which extend down to 1 of the following:
(a) A natural soil barrier that is in
compliance with R 299.4912.
(b) The
seasonal high water table.
(c) The
elevation of the liner within the solid waste disposal unit.
(d) Other barriers approved by the
director.
Notes
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