Code of Massachusetts Regulations › 310 CMR - DEPARTMENT OF ENVIRONMENTAL PROTECTION › Title 310 CMR 7.00 - Air Pollution Control › Section 7.29 - Emissions Standards for Power Plants

Current through Register 1525, July 5, 2024
(1)
Purpose and Scope
. The purpose of 310 CMR 7.29 is to
			 control emissions of nitrogen oxides (NOx), sulfur
			 dioxide (SO2), mercury (Hg), carbon monoxide (CO),
			 carbon dioxide (CO2) and fine particulate matter (PM
			 2.5) (together "pollutants") from affected facilities in Massachusetts. 310 CMR
			 7.29 accomplishes this by establishing output-based emission rates for NO, SO
			 and CO and establishing a cap on CO and Hg emissions from affected facilities.
			 CO emissions standards set forth in 310 CMR 7.29(5)(a)5.a. and b. shall not
			 apply to emissions that occur after December 31, 2008.
(2)
DEFINITIONS
. The
			 definitions in
			 310 CMR
			 7.00 apply to 310 CMR 7.29. However, the terms below
			 have the following meanings when they appear in 310 CMR 7.29. If a term is
			 defined both in
			 310 CMR
			 7.00 and in 310 CMR 7.29(2), the definition in 310 CMR
			 7.29(2) applies for the purpose of 310 CMR 7.29.
ACTUAL EMISSIONS
for a facility means
				that facility's total annual emissions expressed in tons for each pollutant, as
				measured and reported in accordance with 310 CMR 7.29(7).
AFFECTED FACILITY
means a facility
				which emitted greater than 500 tons of SO and 500 tons of NO during any of the
				calendar years 1997, 1998 or 1999 and which includes a unit which is a fossil
				fuel fired boiler or indirect heat exchanger that:
(a) is regulated by 40 CFR Part 72 (the
			 Federal Acid Rain Program);
(b)
			 serves a generator with a nameplate capacity of 100 MW or more;
(c) was permitted prior to August 7, 1977;
			 and
(d) had not subsequently
			 received a Plan Approval pursuant to
			 310 CMR
			 7.00:
Appendix A
or a Permit pursuant
			 to the regulations for Prevention of Significant Deterioration, 40 CFR Part 52
			 , prior to October 31, 1998.
Alternate Hg Designated Representative
means, for a coal-fired affected facility and each coal-fired unit at the
				facility, the natural person who is authorized by the owners and operators of
				the facility and all such units at the facility in accordance with 40 CFR
				60.4110 through 60.4114, to act on behalf of the Hg designated representative
				in matters pertaining to mercury monitoring, recordkeeping, reporting and
				compliance.
Alternative Monitoring System
means a
				system or a component of a system designed to provide direct or indirect data
				of mass emissions per time period, pollutant concentrations, or volumetric
				flow, that is demonstrated to the Administrator as having the same precision,
				reliability, accessibility, and timeliness as the data provided by a certified
				CEMS or certified CEMS component in accordance with 40 CFR Part 75 .
Ash
means bottom ash, fly ash or ash
				generated by an ash reduction process derived from combustion of fossil fuels,
				carbon or other substances.
Automated Data Acquisition and Handling
				System
or
DAHS
means that component of
				the mercury continuous emission monitoring system (CEMS), or other emissions
				monitoring system approved for use under 40 CFR 60.4170 though 60.4176,
				designed to interpret and convert individual output signals from pollutant
				concentration monitors, flow monitors, diluent gas monitors, and other
				component parts of the monitoring system to produce a continuous record of the
				measured parameters in the measurement units required by 40 CFR 60.4170 through
				60.4176.
Block Hourly Average
means the average
				of all valid emission concentrations when the affected unit is operating,
				measured over a one-hour period of time from the beginning of an hour to the
				beginning of the next hour.
CALENDAR QUARTER
means any consecutive
				three-month period (nonoverlapping) beginning January
				1st, April 1st, July
				1st or October
				1st.
CALENDAR YEAR
means any period
				beginning January 1st and ending December
				31st.
Continuous Emission Monitoring System or
				CEMS
means the equipment required by 40 CFR Part 75 used to
				sample, analyze, measure, and provide, by means of readings recorded at least
				once every 15 minutes (using an automated data acquisition and handling system
				(DAHS)), a permanent record of SO, NO or CO emissions or stack gas volumetric
				flow rate.
Historical Actual Emissions
or
Historical Actual Emission Rate
means the average
				annual emissions or output-based emission rate averaged over 1997, 1998 and
				1999. A different three-year period within the past five years may be used if
				requested by the owner of an affected facility, and if the Department
				determines that period is more representative of historical actual
				emissions.
Mercury (Hg) Designated Representative
means, for a coal-fired affected facility and each coal-fired unit at the
				facility, the natural person who is authorized by the owners and operators of
				the facility and all such units at the facility, in accordance with 40 CFR
				60.4110 through 60.4114, to represent and legally bind each owner and operator
				in matters pertaining to mercury monitoring, recordkeeping, reporting and
				compliance.
Mercury Continuous Emission Monitoring
				System
or
Mercury CEMS
means the
				equipment required under 40 CFR 60.4170 through 60.4176 to sample, analyze,
				measure, and provide, by means of readings recorded at least once every 15
				minutes (using an automated data acquisition and handling system (DAHS)), a
				permanent record of Hg emissions, stack gas volumetric flow rate, stack gas
				moisture content, and oxygen or carbon dioxide concentration (as applicable),
				in a manner consistent with 40 CFR Part 75. The following systems are the
				principal types of CEMS required under 40 CFR 60.4170 through 60.4176:
(a) A flow monitoring system,
			 consisting of a stack flow rate monitor and an automated data acquisition and
			 handling system and providing a permanent, continuous record of stack gas
			 volumetric flow rate, in units of standard cubic feet per hour
			 (SCFH);
(b) A Hg concentration
			 monitoring system, consisting of a Hg pollutant concentration monitor and an
			 automated data acquisition and handling system and providing a permanent,
			 continuous record of Hg emissions in units of micrograms per dry standard cubic
			 meter (:g/dscm);
(c) A moisture
			 monitoring system, as defined in
			 40 CFR
			 75.11(b)(2) and providing a
			 permanent, continuous record of the stack gas moisture content, in percent H
			 O.
(d) A carbon dioxide monitoring
			 system, consisting of a CO concentration monitor (or an oxygen monitor plus
			 suitable mathematical equations from which the CO concentration is derived) and
			 an automated data acquisition and handling system and providing a permanent,
			 continuous record of CO2 emissions, in percent
			 CO2; and
(e)
			 An oxygen monitoring system, consisting of an O concentration monitor and an
			 automated data acquisition and handling system and providing a permanent,
			 continuous record of O2, in percent
			 O2.
Mercury Monitoring System
means a
				mercury continuous emission monitoring system, an alternative monitoring
				system, or a sorbent trap monitoring system under 40 CFR Part 60 or 75 but does
				not mean the low mass emissions excepted monitoring methodology in 40 CFR
				75.81(d).
MWh
means megawatt-hours of net
				electrical output.
Net Electrical Output of a Facility
means the total actual net electrical output of the facility used by the New
				England Independent System Operator to determine settlement resources of energy
				market participants.
Output-based Emission Rate
means an
				emission rate for any pollutant, expressed in terms of actual emissions in
				pounds over a specified time period per megawatt-hour of net electrical output
				produced over the same time period.
Output-based Emission Standard
means
				the emission standards for each applicable pollutant, expressed in terms of
				pounds of pollutant emitted per megawatt-hour of net electrical output
				produced, as set forth in 310 CMR 7.29(5).
REPOWERING
means:
(a) Qualifying Repowering Technology as
			 defined by 40 CFR Part 72 or,
(b)
			 The replacement of the heat or power from a unit subject to 40 CFR Part 72 at
			 an affected facility with either a new combustion unit, regardless of the fuel
			 used, or the purchase of heat or power from the owner of a new combustion unit,
			 regardless of the fuel used, provided the replacement unit:
1. (Regardless of owner) is on the same, or
			 contiguous property as the replaced unit;
2. Has a maximum heat output rate or power
			 output rate equal to or greater than the maximum heat output rate or power
			 output rate of the replaced unit; and, the replaced unit is physically removed
			 from the affected facility, or the heat or power available from the replaced
			 unit is limited by limiting hours of operation, maximum heat input or some
			 other method approved by the Department; and,
3. Incorporates technology capable of
			 controlling multiple combustion pollutants simultaneously with improved fuel,
			 boiler or generation efficiency and significantly greater waste reduction
			 relative to the performance of technology in widespread commercial use as
			 determined by the Department.
Rolling
with respect to an average
				means the calculation of an average by dropping the earliest month or calendar
				quarter value and incorporating the latest month or calendar quarter value for
				the period over which an average is calculated.
Sorbent Trap Monitoring System
means
				the equipment required by 40 CFR Part 75 for the continuous monitoring of
				mercury emissions, using paired sorbent traps containing iodinized charcoal
				(IC) or other suitable reagent(s). This excepted monitoring system consists of
				a probe, the paired sorbent traps, a heated umbilical line, moisture removal
				components, an airtight sample pump, a dry gas meter, and an automated data
				acquisition and handling system. The monitoring system samples the stack gas at
				a rate proportional to the stack gas volumetric flow rate. The sampling is a
				batch process. Using the sample volume measured by the dry gas meter and the
				results of the analyses of the sorbent traps, the average mercury concentration
				in the stack gas for the sampling period is determined, in units of micrograms
				per dry standard cubic meter (:g/dscm). Mercury mass emissions for each hour in
				the sampling period are calculated using the average mercury concentration for
				that period, in conjunction with contemporaneous hourly measurements of the
				stack gas flow rate, corrected for the stack gas moisture content.
Total Mercury
means the sum of
				particulate-bound and vapor-phase (elemental and oxidized) mercury in
				combustion gases or emitted to the atmosphere.