06- 096 C.M.R. ch. 101, § 2

Current through 2024-25, June 19, 2024

Section 096-101-2 - Interim Visible Emission Standards

The following standards shall apply until January 1, 2020:

A.Fuel Burning Equipment

Equipment shall be subject to one of the standards in this section based upon the primary fuel licensed for the unit:

(1) Boilers Firing #4, #5, #6 Fuel Oil.

(a) Visible emissions from any unit firing #4, #5, or #6 fuel oil whose rated input capacity is less than 1000 million BTU/hr shall not exceed an opacity of 30 percent on a six (6) minute block average basis, except for no more than two (2) six (6) minute block averages in a 3-hour period.

(b) Visible emissions from any unit firing #4, #5, or #6 fuel oil whose rated input capacity is 1000 million BTU/hr or greater shall not exceed an opacity of 20 percent on a six (6) minute block average basis for 90 percent of all six (6) minute block averages on a quarterly basis. The remaining 10 percent of all six (6) minute block averages on a quarterly basis shall be no greater than 30 percent opacity. Quarterly basis is the period of time from January 1 to March 31, April 1 to June 30, etc. A unit subject to this section shall be required to operate and maintain a Continuous Opacity Monitoring System (COMS).

(2) Boilers Firing #2 Fuel Oil. Visible emissions from any unit firing #2 fuel oil shall not exceed an opacity of 20 percent on a six (6) minute block average basis, except for no more than one (1) six (6) minute block average in a 3-hour period.

(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, except for no more than one (1) six (6) minute block average in a 3-hour period.

(4) Stationary Internal Combustion Engines. Visible emissions from any stationary internal combustion engine manufactured after the year 2000 shall not exceed an opacity of 20 percent on a six (6) minute block average basis, except for no more than two (2) six (6) minute block averages in a 3-hour period.

(5) Wood Waste/Biomass Units. Visible emissions from any wood waste or biomass unit shall not exceed an opacity of 30 percent on a six (6) minute block average basis, except for no more than two (2) six (6) minute block averages in a 3-hour period.

(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 no more than two (2) six (6) minute block averages in a 3-hour period.

For any fuel burning equipment monitored by COMS that are not subject to 40 C.F.R. Part 60, 63 and 75, the COMS shall record opacity on a six (6) minute block average basis, and the 3-hour period shall be a 3-hour block period beginning from midnight to 3:00, from 3:00 to 6:00, from 6:00 to 9:00, etc. For any fuel burning equipment not monitored by COMS the 3-hour period shall be any continuous 3-hour period.

B.General Process Source

(1) Visible emissions from any asphalt batch plant baghouse shall not exceed an opacity of 20 percent on a six (6) minute block average basis, except for no more than two (2) six (6) minute block averages in a 3-hour period.

(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 batch plant baghouses, shall not exceed an opacity of 10 percent on a six (6) minute block average basis, except for no more than one (1) six (6) minute block average in a 1-hour period. The facility shall take corrective action if visible emissions from the baghouses exceed five (5) percent opacity.

(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, except for no more than one (1) six (6) minute block average in a 1-hour period.

For any general process source monitored by COMS that are not subject to 40 C.F.R. Part 60 and 63, the COMS shall record opacity on a six (6) minute block average basis, and the 1-hour period shall be a 1-hour period beginning from midnight to 1:00, from 1:00 to 2:00, from 2:00 to 3:00, etc. For any general process source not monitored by COMS the 1-hour period shall be any continuous 1-hour period.

C.Fugitive Emission Sources

Visible emissions from a fugitive emission source shall not exceed an opacity of 20 percent, except for no more than five (5) minutes in any 1-hour period. Compliance shall be determined by an aggregate of the individual fifteen (15)-second opacity observations which exceed 20 percent in any one (1) hour.

D.Combined Stack Emissions

Except as provided for in subsection 2(E)(2), visible emissions from two or more of any combination of sources subject to this Chapter, which are operating and emitting visible air contaminants through one stack or vent, shall meet one of the following limits as specified in the source's air emission license.

(1) The common stack opacity shall not exceed an opacity of 30 percent recorded as six (6) minute block averages, except for no more than three (3) six (6) minute block averages in a 3-hour block period; or

(2) The common stack opacity shall not exceed 30 percent opacity on a six (6) minute block average basis for 98 percent of all six (6) minute block averages on a quarterly basis. In addition, the common stack opacity shall not exceed 40 percent opacity on a six (6) minute block average basis for 99.5 percent of all six (6) minute block averages on a quarterly basis. Periods of start-up, shutdown and malfunctions are 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., as specified in the source's air emission license. Only sources which use COMS may, at their option, be subject to this paragraph; or

(3) The common stack opacity for sources operating below 50% of the boiler load capacity that the common stack was designed for, based on a 12-month rolling total, shall not exceed 30 percent opacity on a six (6) minute block average basis for 95 percent of all six (6) minute block averages on a quarterly basis. In addition, the common stack opacity shall not exceed 40 percent opacity on a six (6) minute block average basis for 99 percent of all six (6) minute block averages on a quarterly basis. Periods of start-up, shutdown and malfunctions are 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., as specified in the source's air emission license. Only sources which use COMS may, at their option, be subject to this paragraph.

For any combined stack emissions monitored by COMS that are not subject to 40 C.F.R. Part 60, 63 and 75, the COMS shall record opacity on a six (6) minute block average basis, and the 3-hour period shall be a 3-hour block period beginning from midnight to 3:00, from 3:00 to 6:00, from 6:00 to 9:00, etc. For any combined stack emissions not monitored by COMS the 3-hour period shall be any continuous 3-hour period. Sources which emit through a combined stack subject to this section are not subject to the standards applicable to individual sources elsewhere in this Chapter.

E.Fuel burning sources that are restricted to less than 20 percent capacity on an annual basis.

(1) Visible emissions from any fuel burning source shall not exceed an opacity of 30 percent on a six (6) minute block average basis, except for no more than two (2) six (6) minute block averages in a 3-hour period.

(2) Visible emissions from any fuel burning source comprised of two or more units emitted through one stack shall not exceed an opacity of 40 percent on a six (6) minute block average basis, except for no more than three (3) six (6) minute block averages in a 2-hour period.

06- 096 C.M.R. ch. 101, § 2