06-096 C.M.R. ch. 101, § 3 - Visible Emission Standards Effective January 1, 2020 and Thereafter
The following standards shall apply except as provided in Sections 3(D) and 3(E) of this Chapter:
A.
Fuel Burning Equipment.
Equipment shall be subject to one of the standards in this section:
(1) Boilers Firing #4, #5, or #6 Fuel Oil
Boilers firing #4, #5, or #6 fuel oil shall comply with either (a), (b), or (c)
below, as applicable:
(a) Visible emissions
from any unit whose rated input capacity is less than 100 million BTU/hr shall
not exceed an opacity of 30 percent on a six (6) minute block average basis,
except for periods of startup, shutdown, malfunction, or certain equipment
maintenance, during which times the unit operator may elect to comply with the
work practice standards of Sections 4(A) or 4(C) of this Chapter in lieu of
this visible emission standard. Eligible equipment maintenance must be
specifically identified in the facility's air emission license as subject to
work practice standards in this rule.
(b) Visible emissions from any unit whose
rated input capacity is 100 million BTU/hr or greater shall not exceed an
opacity of 20 percent on a six (6) minute block average basis, except for
periods of startup, shutdown, malfunction, or certain equipment maintenance,
during which times the unit operator may elect to comply with the work practice
standards of Sections 4(A) or 4(C) of this Chapter in lieu of this visible
emission standard. Eligible equipment maintenance must be specifically
identified in the facility's air emission license as subject to work practice
standards in this rule.
(c) Visible
emissions from any unit whose rated input capacity is 100 million BTU/hr or
greater shall not exceed an opacity of 20 percent on a six (6) minute block
average basis for 95 percent of all six (6) minute block averages on a
quarterly basis. The remaining 5 percent of all six (6) minute block averages
on a quarterly basis shall be no greater than 45 percent opacity. Periods of
start-up, shutdown and malfunctions are included for the purpose of calculating
block averages under this subsection. Periods when the unit is not operating
are not included for the purpose of calculating block averages under this
subsection. Quarterly basis is the period of time from January 1 to March 31,
April 1 to June 30, etc. A unit subject to this subsection shall be required to
operate and maintain a COMS.
(2) Boilers Firing Distillate Fuel
Visible emissions from any unit firing distillate fuel shall not exceed an opacity of 20 percent on a six (6) minute block average basis.
For the purposes of this Chapter, distillate fuel means the following:
(a)
Fuel oil that complies with the specifications for fuel oil numbers 1 or 2, as
defined by the American Society for Testing and Materials (ASTM) in ASTM
D396;
(b) Diesel fuel oil numbers 1
or 2, as defined in ASTM D975;
(c)
Kerosene, as defined in ASTM D3699;
(d) Biodiesel, as defined in ASTM D6751; or
(e) Biodiesel blends, as defined
in ASTM D7467.
(3)
Boilers Firing Natural Gas or Propane
Visible emissions from any unit firing natural gas or propane shall not exceed an opacity of 10 percent on a six (6) minute block average basis.
(4) Stationary
Internal Combustion Units
Visible emissions from any stationary internal combustion unit (either reciprocating engine or combustion turbine) shall not exceed an opacity of 20 percent on a six (6) minute block average basis.
(a) During periods of startup, the unit
operator of a reciprocating engine may elect to comply with the work practice
standards of Section 4(B) of this Chapter in lieu of this visible emission
standard.
(b) During periods of
startup, the unit operator of a combustion turbine may elect to comply with the
work practice standards of Sections 4(A) or 4(C) of this Chapter in lieu of
this visible emission standard.
(5) Boilers Firing Wood /Biomass and
Multi-Fuel Boilers Boilers firing wood/biomass and multi-fuel boilers shall
comply with either (a) or (b) below:
(a)
Visible emissions shall not exceed 30 percent opacity on a six (6) minute block
average basis, except for periods of startup, shutdown, malfunction, or certain
equipment maintenance, during which times the unit operator may elect to comply
with the work practice standards of Sections 4(A) or 4(C) of this Chapter in
lieu of this visible emission standard. Eligible equipment maintenance must be
specifically identified in the facility's air emission license as subject to
work practice standards in this rule.
(b) Visible emissions shall not exceed an
opacity of 20 percent on a six (6) minute block average basis for 95 percent of
all six (6) minute block averages on a quarterly basis. The remaining 5 percent
of all six (6) minute block averages on a quarterly basis shall be no greater
than 45 percent opacity. Periods of start-up, shutdown and malfunctions are
included for the purpose of calculating block averages under this subsection.
Periods when the unit is not operating are not included for the purpose of
calculating block averages under this subsection. Quarterly basis is the period
of time from January 1 to March 31, April 1 to June 30, etc. A unit subject to
this subsection shall be required to operate and maintain a COMS.
For the purposes of this Chapter, multi-fuel boiler means a boiler which fires more than one type of fuel simultaneously.
(6) Visible emissions from any fuel burning
equipment not specifically listed in this section shall not exceed an opacity
of 30 percent on a six (6) minute block average basis, except for periods of
startup, shutdown, malfunction, or certain equipment maintenance, during which
times the unit operator may elect to comply with the work practice standards of
Sections 4(A) or 4(C) of this Chapter in lieu of this visible emission
standard. Eligible equipment maintenance must be specifically identified in the
facility's air emission license as subject to work practice standards in this
rule.
For any fuel burning equipment monitored by COMS that is not subject to 40 C.F.R. Part 60, 63, or 75 as amended up to July 1, 2018, the COMS shall record opacity on a six (6) minute block average basis.
B.
General
Process Sources
(1) Visible emissions
from any asphalt plant baghouse shall not exceed an opacity of 20 percent on a
six (6) minute block average basis, except for periods of startup, shutdown,
malfunction, or certain equipment maintenance, during which times the unit
operator may elect to comply with the work practice standards of Sections 4(A)
or 4(C) of this Chapter in lieu of this visible emission standard. Eligible
equipment maintenance must be specifically identified in the facility's air
emission license as subject to work practice standards in this rule.
(2) Visible emissions from rock crushers
shall not exceed an opacity of 10 percent on a six (6) minute block average
basis.
(3) Visible emissions from
baghouses, excluding asphalt plant baghouses, shall not exceed an opacity of 10
percent on a six (6) minute block average basis. The facility shall take
corrective action if visible emissions from the baghouses exceed five (5)
percent opacity on a six (6) minute block average basis.
(4) Visible emissions from any general
process source not specifically listed in this section shall not exceed an
opacity of 20 percent on a six (6) minute block average basis.
C.
Fugitive Emission Sources
Visible emissions from a fugitive emission source shall not exceed an opacity of 20 percent, on a five (5) minute block average basis.
D.
Combined
Stack Emissions
Except as provided for in subsection 3(E)(2), visible emissions from two or more of any combination of sources subject to this Chapter which are operating concurrently and emitting air contaminants through one common stack or vent shall comply with either (1) or (2) below. Sources which emit through a common stack subject to this section are subject to the standards applicable to individual sources elsewhere in this Chapter when only one of the sources is in operation.
(1) Visible emissions from a common stack not
monitored by a COMS shall not exceed an opacity of 30 percent on a six (6)
minute block average basis, except for periods of startup, shutdown,
malfunction, or certain equipment maintenance, during which times the unit
operator may elect to comply with the work practice standards of Sections 4(A)
or 4(C) of this Chapter in lieu of this visible emission standard. Eligible
equipment maintenance must be specifically identified in the facility's air
emission license as subject to work practice standards in this rule.
(2) Visible emissions from a common stack
monitored by a COMS shall not exceed an opacity of 20 percent on a six (6)
minute block average basis for 95 percent of all six (6) minute block averages
on a quarterly basis. The remaining 5 percent of all six (6) minute block
averages on a quarterly basis shall be no greater than 45 percent opacity.
Periods of start-up, shutdown and malfunctions are included for the purpose of
calculating block averages under this subsection. Periods when the unit is not
operating are not included for the purpose of calculating block averages under
this subsection. Quarterly basis is the period of time from January 1 to March
31, April 1 to June 30, etc.
E.
Boilers Restricted to Less than 20
Percent Capacity on an Annual Basis
Boilers with a licensed annual capacity limit of 20 percent or less shall comply with either (1), (2), or (3) below:
(1) Visible emissions shall not exceed an
opacity of 30 percent on a six (6) minute block average basis, except for
periods of startup, shutdown, malfunction, or certain equipment maintenance,
during which times the unit operator may elect to comply with the work practice
standards of Sections 4(A) or 4(C) of this Chapter in lieu of this visible
emission standard. Eligible equipment maintenance must be specifically
identified in the facility's air emission license as subject to work practice
standards in this rule.
(2) Visible
emissions from any source comprised of two or more units emitted through a
common stack or vent shall not exceed an opacity of 40 percent on a six (6)
minute block average basis, except for periods of startup, shutdown,
malfunction, or certain equipment maintenance, during which times the unit
operator may elect to comply with the work practice standards of Sections 4(A)
or 4(C) of this Chapter in lieu of this visible emission standard. Eligible
equipment maintenance must be specifically identified in the facility's air
emission license as subject to work practice standards in this Chapter. In
order to be subject to this subsection, all units which emit through the common
stack must be subject to a 20 percent annual capacity limit.
(3) Visible emissions from any stack
monitored by a COMS shall not exceed an opacity of 30 percent on a six (6)
minute block average basis for 95 percent of all six (6) minute block averages
on a quarterly basis. The remaining 5 percent of all six (6) minute block
averages on a quarterly basis shall be no greater than 50 percent opacity.
Periods of start-up, shutdown and malfunctions are included for the purpose of
calculating block averages under this subsection. Periods when the unit is not
operating are not included for the purpose of calculating block averages under
this subsection. Quarterly basis is the period of time from January 1 to March
31, April 1 to June 30, etc. If two or more units emit through a common stack
monitored by a COMS, in order to be subject to this subsection, all units which
emit through the common stack must be subject to a 20 percent annual capacity
limit.
Notes
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