Polk 2

- 5 Combined Cycle Conversion Project (PSD

- EPA

- R4014)

– Final Determination 12/1 8 /2013 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 4

Final Determination Prevention of Significant Deterioration Air Permit PSD

- EPA

- R40 1 4 Tampa Electric Company

– Polk 2

- 5 Combined Cycle Conversion Project December 1 8 , 2013

On September 24, 201 3 , the Region 4 o ffice of the U .S. Environmental Protection Agency (EPA) requested public comment on a draft Prevention of Significant Deterioration (PSD) air permit for Greenhouse Gas (GHG) emissions from Tampa Electric Company’s (TECO) Polk 2

- 5 Combined Cycle Conversion Project (Project).

This Project is a major modification which would modernize the existing Polk Power Station by adding higher

- efficiency combined cycle combustion turbine technology. It consists of modifying four (4) existing simple cyc le combustion turbines, Units 2 through 5, to add combined cycle operation in a 4

-
on

- 1 configuration, increasing the total nominal capacity of the units from 660 to 1,160 megawatts ( MW
, net). The 4

- on

- 1 configuration will consist of: four (4) e xisting Gene ral Electric 7FA.03 combustion turbines, each a nominal 165 MW (net) output; four (4) heat recovery steam generators

, each equipped with duct burners; and one (1) nominal 500 MW (net) output steam turbine generator

. Other equipment to be added includes: a six

- cell mechanical draft cooling tower, a 500 kilowatt (kW) diesel

- fired emergency generator engine, a new transmission line, and existing line upgrades. The Project will increase the total generating capacity of the site to a nominal 1,420 MW (net).

The EPA prepared a preliminary determination , fact sheet, and statement of basis document that explains the permit requirements . These documents, as well as the application, supporting materials, public notice and response to public comments are available in the Administrative Record for this project. The Administrative Record is available at the EPA Region 4 office and can be access ed through EPA’s website at: htt p://www.epa.gov/region4/air/permits/ghgpermits/ghgpermits.html and www.regulations.gov ( Docket #EP A

- R04

- OAR

- 2013

- 0 648 ).

The EPA announced the public comment period and opportunity for public hearing via a public notice published in The (Lakeland) Ledger

, in emails to the GHG public notice list, and on www.regulations.gov and the EPA Region 4’s website. A total of 25 comments from two commenters were received (via email ) during the public comment period , which closed on October 25

, 2013

. The EPA reviewed each of the comment s received and prepared a Respo nse to Comments document , which reiterates the comments and provides the EPA’s response s

. Complete copies of all comments are included in the Administrative R ecord for the Project , which can be accessed at the website s listed above

.

A fter consideration of the expressed view of all interested persons, the pertinent federal statutes and regulations, the application and supplemental information submitted by the applicant, and additional material relevant to the ap plication and contained i n the Administrative R ecord, the EPA has made a final determination in accordance with t itle 40

, C ode of F ederal R egulations (CFR)

, p art 52

, to issue PSD air permit PSD

- EPA

- R40 1 4 to TECO

.Polk 2

- 5 Combined Cycle Conversion Project (PSD

- EPA

- R4014)

– Final Determination 12/1 8 /2013

The final permit differ s from the draft permit offered for public comment and the changes are indentified in the redline

- strikeout version of the final permit. In summary, the EPA made the following changes to the draft permit as a result of our response to public comments:

1. Corrected a number of typos including, but not limited to, incorrect facility street address and condition cross

- referencing.

2. Clarified various inspection frequencies, monitoring, and recordkeeping and reporting requirements specified in Sections IX.B. through F

.

3. Clarified that the GHG emission limits specified in Condition IX.B.2. , excluding the combined cycle/natural gas (with or without duct burners) scenario , are corrected to International Standard Organization (ISO) conditions. Also clarified that the maximum combined heat input rate of the combustion turbines/heat recovery steam generators with duct burners specified under EQUIPMENT LIST is based on ISO conditions.

4. Corrected the averaging time for the GHG emission limits specified in Condition IX.B.2.

, exclud ing the combined cycle/natural gas (with or without duct burners) scenario, from a rolling average to a single 3

- hour test average.

5. Revised Condition IX.D.10.a. to apply only to the combined cycle/natural gas (with or without duct burners) scenario and ad d ed Condition IX.D.10.b. to address the other operating scenarios.

The final permit, EPA’s response to the public comments, and additional supporting information are available at http://www.epa.gov/region4/air/permits/ghgpermits/ghgpermits.html , as well as, the EPA Region 4 Office and are also available upon request to Ms. Rosa Yarbrough at: R4GHGpermits@epa.gov ; (404) 562

- 9643 ; or in writing to: EPA Region 4, APTMD; ATTN: Ms . Rosa Yarbrough ; 61 Forsyth Street, SW; Atlanta, GA 30303.

Any person who filed comments on the draft permit may petition the Envir onmental Appeals Board (EAB) to review any of the revised condition s of the final permit , including a showing that the conditions in question are based on a finding of fact or law which is clearly erroneous, as well as, a demonstration that these same issues were raised during the comment period

. Please see 40 CFR § 124.19 and visit http://www.epa.gov/eab/ for more information regarding the procedure for appeals to the EAB

.