Please note that some provisions of this approval are shown in strikeout for the sole 

purpose of showing what provisions are not incorporated into the Massachusetts Regional 

Haze State Implementation Plan (SIP). The provisions shown in strikeout are a part of the

approval and are state enforceable. 

This information is available in alternate format. Call Michelle Waters-Ekanem, Diversity Director, at 617-292-5751. TDD# 1-866-539-7622 or 1-617-574-6868

MassDEP Website: www.mass.gov/dep

Printed on Recycled Paper

April 12, 2012

 

Peter Balkus, Director F&H Station III

Dominion Energy Brayton Point, LLC

5000 Dominion Boulevard

Glen Allen, Virginia 03060-6711

RE: AMENDED EMISSION CONTROL PLAN FINAL APPROVAL

Application for: BWP AQ 25 

310 CMR 7.29 Power Plant Emission Standards

Transmittal Number: X241755

Application Number: SE-12-003

Source Number: 1200061

AT: Dominion Energy Brayton Point, LLC

Brayton Point Station

1 Brayton Point Road 

Somerset, Massachusetts 02726-0440

Dear Mr. Balkus:

The Southeast Region of the Department of Environmental Protection (Department), 

Bureau of Waste Prevention, has reviewed your amended application for approval of the 

Emission Control Plan (ECP) application dated January 25, 2012. This amended application 

has been submitted to describe how emission limitations and compliance schedules for the 

control of certain designated pollutants contained in 310 CMR 7.29, “Emission Standards for 

Power Plants,” will be implemented for equipment and processes located at the Dominion 

Energy Brayton Point, LLC – Brayton Point Station (“Dominion”) at Brayton Point Road in 

Somerset, Massachusetts. This application for approval of the ECP bears the signature of Mr. 

Peter Balkus as the company contact responsible for compliance with 310 CMR 7.29.

The amended ECP application proposes a Unit 1, 2, 3 and 4 permit restriction to 

disallow the use of 310 CMR 7.29 Sulfur Dioxide (SO2) Early Reduction Credits (ERC’s) or 

Federal Acid Rain allowances for compliance with 310 CMR 7.29 after June 1, 2014, in support 

of the Massachusetts Regional Haze State Implementation Plan (SIP).
Dominion Energy Brayton Point, LLC

04/12/12 Amended ECP Final Approval

Transmittal No. X241755 

Application No. SE-12-003

Page 2 of 12

The Department has previously approved, pursuant to 310 CMR 7.29, the following 

air pollution controls all of which have been constructed and are in operation, other than the 

Unit 3 Dry Scrubber and Fabric Filter and the Powder Activated Carbon Injection system

upstream of the Unit 3 DS/FF that are currently under construction and are anticipated to be 

in commercial operation in the 1st Quarter 2013:

 Units 1 and 3 Selective Catalytic Reduction (SCR) NOx emission control systems that 

uses aqueous ammonia for removal of Nitrogen Oxides (NOx);

 Unit 1 and 2 Spray Dryer Absorbers (SDA) for removal of Sulfur Dioxide (SO2) 

emissions followed by a Fabric Filter (FF) baghouses at the SDA outlets for control of 

particulate matter emissions;

 Unit 1 and 2 Powder Activated Carbon (PAC) injection systems upstream of the 

SDA/FF systems for the removal of mercury emissions;

 Unit 3 Dry Scrubber (DS) for removal of Sulfur Dioxide (SO2) emissions followed by

a FF baghouse at the DS outlet for control of particulate matter emissions;

 Unit 3 PAC injection system upstream of the DS/FF system for the removal of 

mercury emissions;

 Unit 1, 2 and 3 PAC injection systems installed upstream of the Koppers ESPs with 

the Koppers ESPs taken out of service to provide additional residence time for the 

PAC for the removal of mercury (Hg);

 Ash Reduction Process (ARP) for Unit 1, 2 and 3.

This Amended Emission Control Plan (ECP) Final Approval supersedes the 

Amended ECP Final Approval (Application No. 4B08050) dated December 29, 2008; the

Amended ECP Final Approval (Application No. 4B05053), dated March 29, 2006; the Amended 

ECP Final Approval (Application No. 4B04021), dated October 20, 2004; and the ECP Final 

Approval (Application No. 4B01042), dated June 7, 2002. 

LEGAL AUTHORITY

The Department has adopted 310 CMR 7.29 - a regulation to lower emissions of 

sulfur dioxide (SO2), carbon dioxide (CO2), nitrogen oxides (NOx) and mercury (Hg) from 

certain power plants, and to establish a framework for reductions in emissions of carbon 

monoxide (CO) and fine particulate matter (PM 2.5) - pursuant to the Massachusetts General 

Laws, Chapter 111, Sections 142 A-M.

Regulation 310 CMR 7.29 requires any person who owns, leases, operates or controls 

an affected facility to comply with 310 CMR 7.29 in its entirety. An affected facility means a 

facility which emitted greater than 500 tons of SO2 and 500 tons of NOx 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: (1) is regulated by 40 CFR Part 72 (the Federal Acid 

Rain Program); (2) serves a generator with a nameplate capacity of 100 megawatts (MW) 

or more; (3) was originally permitted prior to August 7, 1977; and (4) 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. Dominion Energy Brayton Point, LLC is an affected facility.

The purpose of 310 CMR 7.29 is to control emissions of NOx, SO2, Hg, CO, CO2, and 

PM 2.5 (together, "pollutants") from affected electric generating facilities in Massachusetts. 

310 CMR 7.29 accomplishes this by establishing maximum output-based emission rates for 
Dominion Energy Brayton Point, LLC

04/12/12 Amended ECP Final Approval

Transmittal No. X241755 

Application No. SE-12-003

Page 3 of 12

NOx, SO2, and CO2, establishing maximum output-based emission rates or minimum 

removal efficiencies for Hg, and establishing a cap on CO2 and Hg emissions from affected 

facilities. The maximum output-based emission rate and cap for CO2 is applicable through

December 31, 2008 and as of January 1, 2009 CO2 emissions will be subject to the 

provisions of 310 CMR 7.70 Massachusetts CO2 Budget Trading Program. Emission limits for 

CO and PM 2.5 have not been addressed at this time.

Applicable requirements and limitations contained in 310 CMR 7.29 shall not supersede, 

relax or eliminate any more stringent conditions or requirements (e.g. emission limitation(s), 

testing, record keeping, reporting, or monitoring requirements) established by regulation or 

contained in a facility's previously issued source specific Plan Approval(s) or Emission Control 

Plan(s). The facility must submit a Minor Modification Operating Permit application and revise 

their Operating Permit to include the Amended ECP Final Approval.

MassDEP issued a Draft Amended ECP Approval on February 16, 2012. Pursuant to 310 

CMR 7.29(6)(h)1., public notice of this Draft Amended ECP Approval was published in 

accordance with M.G.L. 30A in The Herald News on February 19, 2012, followed by a 30-day 

public comment period. As such the public comment period ended on March 20, 2012. During 

the public comment period, no comments were received.

Based upon the above, the Department has determined that the referenced Amended

ECP Application is administratively and technically complete and that the proposed 

modifications are in conformance with current air pollution control engineering practices and 

hereby issues this Amended ECP Final Approval for the proposed modifications of your 

power plant unit(s), with the conditions listed below.

* Legend to Abbreviated Terms within Tables 1 through 6:

EU # = Emission Unit Number

NOx = Nitrogen Oxides

SO2 = Sulfur Dioxide

Hg = Mercury

CO = Carbon Monoxide

CO2 = Carbon Dioxide

PM 2.5 = Fine Particulate Matter

MMBTU/HR = fuel heat input in million British Thermal Units per hour

MW (NET) = net electrical output in Megawatts

lbs/MWh = pounds per Megawatt-hour of net electrical output

lbs/GWh = pounds per Gigawatt-hour of net electrical output

MFR = Manufacturer

CEMS = Continuous Emission Monitors

R-C = Research-Cottrell 
Dominion Energy Brayton Point, LLC

04/12/12 Amended ECP Final Approval

Transmittal No. X241755 

Application No. SE-12-003

Page 4 of 12

1. EQUIPMENT DESCRIPTION

The following emission units (Table 1) are subject to and regulated by this Amended 

ECP Final Approval:

Table 1 *

EU # DESCRIPTION OF 

EMISSION UNIT

EU DESIGN CAPACITY POLLUTION CONTROL MEASURES 

(PCM)1

(MMBTU/HR) MW (NET)

EU 1 Combustion 

Engineering 

MFR # 19407 Type 

CC,

Water Tube Boiler

2,250 255 Selective Catalytic Reduction

Ash Reduction Process

R-C Electrostatic Precipitators

Low NOx Burners with Overfire Air

Management of Lower Sulfur Fuels

Spray Dryer Absorber

Fabric Filter Baghouse

Powder Activated Carbon

EU 2 Combustion 

Engineering 

MFR # 19617 Type 

CC,

Water Tube Boiler

2,250 255 Ash Reduction Process

R-C Electrostatic Precipitators

Low NOx Burners with Overfire Air

Management of Lower Sulfur Fuels

Spray Dryer Absorber

Fabric Filter Baghouse

Powder Activated Carbon

EU 3 Babcock & Wilcox

Model # UP - 52

Water Tube Boiler

5,655 633 Selective Catalytic Reduction

Ash Reduction Process

R-C Electrostatic Precipitators

Low NOx Burners with Overfire Air

Management of Lower Sulfur Fuels

Dry Scrubber

Fabric Filter Baghouse

Powder Activated Carbon

EU 4 Riley Stoker

Model # 1SR

Water Tube Boiler

4,800 446 Electrostatic Precipitators

Low NOx Burners

Management of Lower Sulfur Fuels

Flue Gas Recirculation

Table 1 Notes:

1. Details of the Proposed Pollution Control Measures including alternatives under 

consideration are described in Sections E, F, and G of the application.
Dominion Energy Brayton Point, LLC

04/12/12 Amended ECP Final Approval

Transmittal No. X241755 

Application No. SE-12-003

Page 5 of 12

2. APPLICABLE REQUIREMENTS

A. EMISSION LIMITS AND RESTRICTIONS

Dominion shall comply with the emission limits/restrictions as contained in Table 2 

below. The schedule for compliance with these emission limitations is contained in Table 6 of 

this Amended ECP Final Approval.

Table 2 *

EU # POLLUTANT EMISSION LIMIT/STANDARD APPLICABLE REGULATION

AND/OR

APPROVAL NUMBER

EU 1, 

EU 2, 

EU 3, 

EU 4

NOx Shall not exceed 1.5 lbs/MWh calculated over any 

consecutive 12 month period, recalculated monthly. 

310 CMR 7.29(5)(a)1.a.

Shall not exceed 3.0 lbs/MWh calculated over any 

individual month.

310 CMR 7.29(5)(a)1.b.

SO2 Shall not exceed 6.0 lbs/MWh calculated over any 

consecutive 12 month period, recalculated monthly. 

310 CMR 7.29(5)(a)2.a.

Shall not exceed 3.0 lbs/MWh calculated over any 12 

month period, recalculated monthly. 

310 CMR 7.29(5)(a)2.b.i.

Shall not exceed 6.0 lbs/MWh calculated over any 

individual month.

310 CMR 7.29(5)(a)2.b.ii.

EU 1,

EU 2,

EU 3

EU 1, 

EU 2, 

EU 3, 

EU 4
Dominion Energy Brayton Point, LLC

04/12/12 Amended ECP Final Approval

Transmittal No. X241755 

Application No. SE-12-003

Page 6 of 12

Table 2 Notes:
Dominion Energy Brayton Point, LLC

04/12/12 Amended ECP Final Approval

Transmittal No. X241755 

Application No. SE-12-003

Page 7 of 12

B. COMPLIANCE DEMONSTRATION

The facility is subject to the monitoring/testing, record keeping, and reporting 

requirements as contained in Tables 3, 4 and 5 below and 310 CMR 7.29, as well as the 

applicable requirements contained in Table 2:

Table 3 *

EU# MONITORING/TESTING REQUIREMENTS

EU 1, 

EU 2, 

EU 3, 

EU 4

Actual emissions shall be monitored for individual units and monitored as a facility total for all units 

included in the calculation demonstrating compliance. Actual emissions shall be monitored in 

accordance with 40 CFR Part 75 for SO2, and NOx. 

Monitor actual net electrical output, expressed in megawatt-hours. Actual net electrical output shall be 

provided for individual units and as a facility total for all units included in the calculation demonstrating 

compliance.

EU 1, 

EU 2, 

EU 3

In accordance with 310 CMR 7.29(7)(g), operate each continuous emission monitoring system at all 

times that the emissions unit(s) is operating except for periods of CEMS calibrations checks, zero span 

adjustment, and preventive maintenance as described in the monitoring plan approved by the 

Department and as determined during certification. Notwithstanding such exceptions, in all cases 

obtain valid data for at least 75% of the hours per day, 75% of the days per month, and 90% of the 

hours per quarter during which the emission unit is combusting solid fossil fuel or ash.
Dominion Energy Brayton Point, LLC

04/12/12 Amended ECP Final Approval

Transmittal No. X241755 

Application No. SE-12-003

Page 8 of 12

Table 4 *

EU# RECORD KEEPING REQUIREMENTS

EU 1 

EU 2 

EU 3

EU 4

Maintain a record of actual emissions for each regulated pollutant for each of the preceding 12 

months. Actual emissions shall be recorded for individual units and as a facility total for all 

units included in the calculation demonstrating compliance. Actual emissions provided under 

this section shall be recorded in accordance with 40 CFR Part 75 for SO2, and NOx

Maintain a record of actual net electrical output for each of the preceding 12 months, expressed in 

megawatt-hours. Records of actual net electrical output shall be maintained for individual units 

and as a facility total for all units included in the calculation demonstrating compliance.

Maintain a record of the resulting output-based emission rates for each of the preceding 12 

months, and each of the 12 consecutive rolling month time periods, expressed in pounds per 

megawatt-hour. Output based emission rates shall be provided for individual emission units and 

as a facility total for all units included in the calculation demonstrating compliance.

Keep all measurements, data, reports and other information required by 310 CMR 7.29 on-site 

for a minimum of five years, or any other period consistent with the affected facility's Operating 

Permit.

EU 1 

EU 2 

EU 3

In accordance with 310 CMR 7.29(7), by January 30 of the year following the earliest applicable 

compliance date and January 30 of each calendar year thereafter, the facility shall submit a 

report to the Department demonstrating compliance with the emission standards contained in 

310 CMR 7.29(5)(a) and in an approved emission control plan. 
Dominion Energy Brayton Point, LLC

04/12/12 Amended ECP Final Approval

Transmittal No. X241755 

Application No. SE-12-003

Page 9 of 12

Table 5 *

EU# REPORTING REQUIREMENTS

EU 1 

EU 2 

EU 3

EU 4

By January 30 of the year following the earliest applicable compliance date for the affected 

facility under 310 CMR 7.29(6)(c), and January 30 of each calendar year thereafter, the 

company representative responsible for compliance shall submit a compliance report to the 

Department demonstrating the facility’s compliance status with the emission standards 

contained in 310 CMR 7.29(5)(a) and in an approved Emission Control Plan. The report shall 

demonstrate the facility’s compliance status with applicable monthly emission rates for each 

month of the previous calendar year, and each of the twelve previous consecutive 12-month 

periods. The compliance report shall include all statements listed in 310 CMR 7.29(7)(b)4.1

The Department may verify the facility’s compliance status by whatever means necessary, 

including but not limited to requiring the affected facility to submit information on actual 

electrical output of company generating units provided by the New England Independent 

System Operator (ISO), or any successor thereto.

EU 1 

EU 2 

EU 3

Submit to the appropriate Department regional office a compliance report in accordance with 

310 CMR 7.29(7)(b).

EU 1 

EU 2 

EU 3

FACIL

ITY

Table 5 Notes:

1. If the ISO final settlement of actual electrical output is not available, the facility shall 

submit a compliance report based on provisional values of actual electrical output. 

Upon receiving certified ISO values of actual electrical output for all provisional 

months within the calendar year, the facility shall submit a revised compliance report 

within 30 days thereafter.

3. COMPLIANCE SCHEDULE
Dominion Energy Brayton Point, LLC

04/12/12 Amended ECP Final Approval

Transmittal No. X241755 

Application No. SE-12-003

Page 10 of 12

The affected facility shall be in full compliance with the applicable requirements in 

accordance with the dates below:

TABLE 6 *

COMPLIANCE PATH

POLLUTANT STANDARD DATE

NOx

SO2

310 CMR 7.29(5)(a)1.a.

310 CMR 7.29(5)(a)2.a.

October 1, 2006

NOx

SO2

310 CMR 7.29(5)(a)1.b.

310 CMR 7.29(5)(a)2.b.

October 1, 2008

Details of the compliance schedule/milestones are described in Section H of the 

amended ECP application.
Dominion Energy Brayton Point, LLC

04/12/12 Amended ECP Final Approval

Transmittal No. X241755 

Application No. SE-12-003

Page 11 of 12

4. SPECIAL CONDITIONS FOR ECP

1. The Department may verify compliance with 310 CMR 7.29(5) by whatever means 

necessary, including but not limited to: inspection of a unit's operating records; 

requiring the facility to submit information on actual electrical output of company 

generating units provided to that person by the New England Independent System 

Operator, or any successor thereto; testing emission monitoring devices; and, 

requiring the facility to conduct emissions testing under the supervision of the 

Department.

2.

3. Dominion shall not use 310 CMR 7.29 SO2 Early Reduction Credits (ERC’s) or Federal 

Acid Rain allowances for compliance with 310 CMR 7.29 after June 1, 2014.

5. GENERAL CONDITIONS FOR ECP

1. The facility shall maintain continuous compliance at all times with the terms of this 

Amended ECP Final Approval and the applicable emission rates in 310 CMR 7.29.

2. This Amended ECP Final Approval may be suspended, modified, or revoked by the 

Department, if at any time the facility is violating any applicable Regulation(s) or 

condition(s) of this Amended ECP Final Approval letter.

3. This Amended ECP Final Approval consists of Dominion’s application materials and 

this Amended ECP Final Approval letter. If conflicting information is found between 

these two documents, then the requirements of the Amended ECP Final Approval 

letter shall take precedence over the documentation in the application materials.

4. Should a condition of air pollution occur as a result of the operation of these units, 

then the facility shall immediately take appropriate steps to abate said condition 

even though the facility is otherwise in compliance with this Amended ECP Final 

Approval.

5. This Amended ECP Final Approval does not negate the responsibility of the facility to 

comply with this or any other applicable federal, state, or local regulations now or in 

the future. Nor does this Amended ECP Final Approval imply compliance with any 

other applicable federal, state, or local regulations now or in the future.

6. If provisions or requirements from any other regulation or permit conflict with a 

provision of 310 CMR 7.29, the more stringent of the provisions will apply unless 

otherwise determined by the Department in the affected facility’s Operating Permit.

7. Failure to comply with any of the above stated provisions will constitute a violation of 

the "Regulations", and can result in the revocation of the Amended ECP Final 

Approval granted herein.

Enclosed is a stamped approved copy of the Amended ECP application.
Dominion Energy Brayton Point, LLC

04/12/12 Amended ECP Final Approval

Transmittal No. X241755 

Application No. SE-12-003

Page 12 of 12

Should you have questions concerning this matter or regarding the terms or conditions 

of this Amended ECP Final Approval, please do not hesitate to contact the undersigned at 

the Southeast Region at (508) 946-2779.

 Very truly yours,

 John K. Winkler, Chief 

 Permit Section

 Bureau of Waste Prevention

Enclosure

ecc: Pamela Faggert, Dominion Resources Services, Inc.

Cathy Taylor, Dominion Resources Services, Inc.

Elizabeth Willoughby, Dominion Resources Services, Inc.

Meredith Simas, Dominion Resources Services, Inc.

Ida McDonnell, U.S. EPA New England, Region 1, Boston, MA

Somerset Board of Selectmen

Marilyn Levenson, MassDEP-Boston

Nancy Seidman, MassDEP-Boston

Glenn Keith, MassDEP-Boston

Eileen Hiney, MassDEP-Boston

Yi Tian, MassDEP-Boston

William Lamkin, MassDEP-NERO

David Johnston, MassDEP-SERO

Laurel Carlson, MassDEP-SERO

Charlie Kitson, MassDEP-SERO

Laura Black, MassDEP-SERO