CITY OF PHILADELPHIA

DEPARTMENT OF PUBLIC HEALTH

AIR MANAGEMENT SERVICES

RACT PLAN APPROVAL

Effective Date: February 9, 2016

Expiration Date: None

Replaces Permit No. PA Permit Number 51-4903 dated 7/11/01

In accordance with provisions of the Air Pollution Control Act, the Act of January 8, 1960, P.L. 2119, as amended, and after due consideration of a Reasonably Available Cont rol Technology (RACT) proposal received under the Pennsylvania Code, T itle 25, Chapter 129.91 thru 129.95, of the rules and regulations of the Pennsylvania Department of Environmental Pr otection (PADEP), Air Management Services (AMS) approved the RACT proposal of the Facility below for the s ource(s) listed in section

1.A. Emission Sources of the a ttached RACT Plan Approval.

Facility: Exelon Generation Compa ny - Richmond Generating Station

Owner: Exelon Generation Company

Location: 3901 North Delaware Av enue, Philadelphia, PA 19137 Mailing Address: 300 Exelon Way, Kennett Square, PA 19348 SIC Code(s): 4911

Plant ID: 4903

Facility Contact: Dale Davis Phone: (215) 831-7606 (office) (267) 207-1244 (cell)

Permit Contact: Albert M. Hatton III Phone: (610) 765-5495

Responsible Official: Paul Weeks Title: General Manager

2/9/2016 Edward Wiener, Chief of S ource Registration DateRACT PLAN APPROVAL Exelon - Richmond Station Page 2

2/9/16 The RACT Plan Approved is subj ect to the following conditions:

1. The purpose of this Plan Approval is to es tablish Nitrogen Oxides ( NOx) Reasonably Available Control Technology (RACT) for PECO – Richm ond (Exelon). This includes the following emission sources and control equipment:

A. Emission Sources

(1) Two General Electric Frame 7B co mbustion turbines, each burns #2 oil and kerosene. The nominal output for each is 66 MW.

2. This Plan Approval authorizes:

A. The implementation of the following ope rational limitations on the two Richmond combustion turbines to comply with the case- by-case determination in the RACT proposal submitted by PECO Energy Co. (Exelon):

(1) Maximum 12-month rolling capacity fact or less than 15% for each combustion

turbine. The rolling 12-month capacity factor is expressed as:

Last 12 months net generation (MWH)

--------------- ------------------ ------------------ ----------------- ------------------ --------------

- Maximum capacity of unit (MW) x 24 hrs/day x No. of days in last 12 months

(2) The installation, maintenance and oper ation of the combus tion turbines in

accordance with manufactu rers specifications.

3. RACT Implementation Schedule

A. Upon issuance of this Plan Approval, PECO (Exelon) shall begin immediate implementation of the measures necessary to comply with the approved RACT proposal.

4. Monitoring Requirements

A. Combustion Turbines: Daily fuel usage, and net generation for each combustion turbine on a monthly basis. Rolling 12-month capacity f actor for each combustion turbine, calculated on a monthly basis.

B. Exelon – Richmond shall perform an AMS-appr oved stack test on one combustion turbine every 5 years to demonstrate compliance with the NOx emission limits in Condition 5.A. If

the test results are above 0.34 lbs/MMBTU or 284.92 lbs/hr (50% of the limits), the other

combustion turbine shall also be te sted during that 5-year period.RACT PLAN APPROVAL Exelon - Richmond Station Page 3

2/9/16 5. Emission Limitations

A. Each combustion turbine listed 1.A.(1) above shall limit its NOx emissions to no more than 0.68 pounds per MMBtu and 569.84 pounds per hour.

6. Recordkeeping and Reporting Requirements

A. PECO - Richmond shall maintain a file contai ning all the records a nd other data that are required to be collected to demonstrate co mpliance with NOx RACT requirements of 25

PA Code SS129.91-129.94. These records sha ll include records of the monitoring requirements of this Plan Approval.

B. The records shall provide sufficient data and calculations to clearly demonstrate that the requirements of SS129.91-129.94 are met.

C. Data of information required to determine compliance shall be recorded and maintained in

a time frame consistent with the aver aging period of the requirement.

D. Records shall be retained for at least five years and shall be made available to AMS on

request.

7. The operation of the aforementioned combustion turbines shall not at any time result in the

emission of visible air contamin ants in excess of the limitatio ns specified in Section 123.41, particulate matter in excess of the limitations specified in Section 123.11 or sulfur oxides in excess of the limitations specified in Section 123.22, all S ections of Chapter 123 of Article III of the Rules and Regulations of the Department of Envi ronmental Resources, or in the emission of any of these or any other type of air contaminan t in excess of the limitations specified in, or established pursuant to, any othe r applicable rule or regulation contai ned in Article III.

8. The company shall not impose conditions upon or otherwise restrict AMSs access to the aforementioned source(s) and/or any associated air cleaning devi ce(s) and shall allow AMS to have access at any time to said source(s) and associated air cleaning device(s) with such measuring and recording equipment, including equipment recording visu al observations, as AMS deems necessary and proper for performing its dut ies and for the effective enforcement of the Air

Pollution Control Act.

9. Revisions to any emission limitations incorporated in this Plan Approval will require resubmission as revision to the PA State Impl ementation Plan. The applicant shall bear the cost of public hearing and notification required for EPA approval as stipulated in 25 PA Code Section 129.91(h).