### INDIANA DEPARTMENT **OF ENVIRONMENTAL MANAGEMENT**  **We Protect**  **Hoosiers and**  **Our Environment.** 

**Michael R.**  **Pence Governor** 



## Mr. Robert **Kaplan Acting Regional**  **Administrator U.S.**  **EPA, Region**  **5 77**  **West Jackson**  **Boulevard Chicago,**  **IL 60604-3950** 

**Dear Mr.**  **Kaplan: 100**  **N. Senate**  **Avenue •**  **Indianapolis, IN**  **46204 (800)**  **451-6027 •**  **(317) 232-8603**  **• www** **.idem.IN.gov**



## February **5, 2016**  **Carol S.**  **Comer Commissioner** 



## Re: **State Implementation**  **Plan Submittal for**  **Indiana Regarding**  **1-Hour S02**  **Attainment Clifty**  **Creek Generating**  **Station in**  **Jefferson County,**  **Indiana; Request for**  **Parallel Processing**  **(Commissioner's Order**  **#201 6-02)** 
**Pursuant to**  **Section 110**  **of the Clean**  **Air Act**  **and Title**  **13 of**  **the Indiana**  **Code, the**  **Indiana Department**  **of Environmental**  **Management (IDEM)**  **submits a**  **request for**  **parallel processing**  **of an**  **amendment to**  **the Indiana**  **state implementation**  **plan (SIP).**  **IDEM requests**  **that United States**  **Environmental Protection**  **Agency (U.S.**  **EPA) approve**  **the requirements**  **for Clifty**  **Creek Generating**  **Station (Clifty Creek)**  **in Commissioner's**  **Order #2016-02.**  **IDEM issued**  **a Commissioner's**  **Order on**  **February 1,**  **2016, to**  **establish permanent**  **and enforceable**  **sulfur dioxide**  **(S02) emission**  **limits for**  **Clifty Creek, located**  **in Jefferson**  **County, Indiana, in**  **order to**  **ensure continued attainment**  **of the**  **2010 1-hour**  **sulfur dioxide**  **(S02) standard in**  **the area**  **surrounding the**  **facility. The**  **Commissioner's Order**  **contains a**  **facility-wide maximum**  **720 operating**  **hour S02**  **rolling average**  **mass emission**  **rate applicable**  **to Units**  **1 through**  **6 combined,**  **as well**  **as reporting**  **and recordkeeping**  **requirements and**  **method for**  **compliance. The**  **effective date**  **for the**  **emission limitations**  **in the**  **Commissioner's Order**  **is April**  **19, 2016.**  **It contains**  **and meets**  **the requirements**  **set forth**  **in 42**  **U.S.C.** 

# § **7407(d)(3)(E)(iii) and**  **the conditions**  **will become**  **applicable requirements**  **as defined**  **in 326**  **lAC 2-7-1(6).**  **·** 

## The **rulemaking documentation**  **is being**  **forwarded to**  **U.S. EPA**  **with a**  **request for**  **parallel processing**  **while IDEM**  **completes the**  **steps necessary**  **for public**  **notice. When**  **the public notice**  **process is**  **complete, this**  **SIP submittal**  **will be**  **supplemented with**  **an addendum**  **that includes**  **the public**  **notice documentation.**  **The public**  **notice period**  **is scheduled**  **to end**  **on March**  **4, 2016.** 

**An Equal**  **Opportunity Employer** 

# 0 **<i} Recycled**  **Paper A**  **State that**  **Works -** 

## Mr. **Robert Kaplan** 

**Page 2**  **of 2** 
**This submittal**  **consists of**  **one** 

# (1) **hard copy**  **of the**  **required documentation.**  **An electronic**  **version of**  **the submittal**  **in PDF**  **format that**  **is identical**  **to the**  **hard copy**  **has been**  **sent Doug**  **Aburano, Chief**  **of U.S. EPA**  **Region 5's**  **Attainment Planning**  **and Maintenance**  **Section. In**  **order to**  **assist with**  **your review of**  **this state implementation**  **plan submission,**  **a list**  **of supporting**  **documents is**  **attached. Throughout**  **the development**  **of this**  **Commissioner's Order,**  **staff of**  **the Office**  **of Air**  **Quality worked**  **closely with your staff**  **to ensure**  **that any**  **potential problems that**  **might exist**  **with this**  **requested state**  **implementation plan**  **revision would be**  **resolved. I**  

## request **that U.S.**  **EPA approve**  **this modification**  **of Indiana's**  **state implementation**  **plan. If**  **you have**  **any questions**  **or need**  **additional information,**  **please contact**  **Scott Deloney,**  **Chief, Air**  **Programs Branch,**  **at (317)**  **233-5694.**

**KB/mad Attachments:**  **Supporting Documents**  **Sincerely,**



# (drz�
**Keith Baugues**  **Assistant Commissioner**  **Office of**  **Air Quality** 

**cc: Doug**  **Aburano, U.S.**  **EPA Region**  **5 (no**  **enclosures) John**  **Mooney, U.S.**  **EPA Region**  **5 (no**  **enclosures) Steve**  **Rosenthal, U.S.**  **EPA Region**  **5 (no**  **enclosures) Pamela**  **Blakley, U.S.**  **EPA Region**  **5 (no**  **enclosures) John**  **Summerhays, U.S.**  **EPA Region**  **5 (no**  **enclosures) Keith**  **Baugues, IDEM-OAQ**  **(no enclosures)**  **Scott Deloney,**  **IDEM-OAQ (no**  **enclosures) Mark**  **Derf, IDEM-OAQ (no enclosures)**  **Mike Mosier,**  **IDEM-OAQ (no**  **enclosure) Christine**  **Pedersen, IDEM-OAQ**  **(no enclosures)**  **Jessica Reiss,**  **IDEM-OAQ (no**  **enclosures) File**  **Copy**

## Supporting **Documents**

**Attachment A:**  **Administrative Checklist**  **(40 CFR**  **51, Appendix**  

# V) **Attachment 8:**  

## Commissioner's **Order #2016-02**  **Attachment C:**  **Legal Notice**  **of Public**  **Hearing and**  **Certificates of**  **Web Publication**  **Attachment D:**  **Modeling Summary**  **Data, calculations**  **and methodology**  **for determining**  **a facility-wide**  **maximum 720**  **operating hour**  **rolling average**  **S02 mass**  **emission rate**  **based on**  **Clifty Creek's**  **continuous emission**  **monitoring data**  **(available upon**  **request).**

# Attachment **A**
**Administrative Checl<list ADMINISTRATIVE**  **CHECKLIST (40**  **CFR 51, Appendix**  **V)**

**1. The**  **submittal is**  **accompanied by**  **a fo** **rmal letter**  **of submittal**  **fr om**  **the governor**  **or his**  **designee. 2.**  **Evidence that**  **the State**  **has adopted**  **the plan**  **in the**  **State code**  **or body**  **of regulations;**  **or issued**  **the pennit,**  **order, consent**  **agreement ("document"); in**  **final form.** 

**a. Date**  **of adoption**  **or final**  **issuance: b.**  **The effective**  **date of**  **the plan,**  **if different**  **from the**  **adoption/issuance date.**  **3. Evidence**  **that the**  **State has**  **the necessary**  **legal authority**  **under state**  **law to**  **adopt and implement**  **the plan.**  **4. A**  **copy of**  **the actual**  **regulation or**  **document submitted**  **for approval**  **and incorporation**  **by reference**  **into the**  **plan, including**  **the fo** **llowing:**

**a. Indication**  **of the**  **changes made**  **to the**  **existing approved**  **plan, where applicable.**  **b. The**  **submittal shall**  **be a**  **copy of**  **the official**  **State regulation**  **or document**  **signed, stamped,**  **dated by the**  **appropriate state**  **official indicating**  **that it**  **is fully**  **enforceable by**  **the State.**  **Effective date**  **shall be**  **stated in**  **the document**  **itself. 5.**  **Evidence that**  **the State**  **fo llowed**  **all of**  **the procedmal**  **requirements of**  **the State's**  **laws and**  **constitution in**  **conducting and**  **completing the**  **adoption/issuance of**  **the plan.**  

## 6. **Evidence that**  **public notice**  **was given,**  **including date**  **of proof**  **of publication.**  **7. Certification**  **that public**  **hearings were**  **held in**  **accordance with**  **information provided**  **in public**  **hearing notice.**  **8. Compilation**  **of public**  **comments and**  **State's response.**  **9. Technical**  **Support Document**  **(if source**  **specific change).**  **Enclosed**

**Attachment** 

## B

**January 11,**  **2016 18**  **days after**  **issuance**

**IC 13-14-1-9**  **IC 13-14-2-1**  **Attachment B** 

**Attaclm1ent** 

## B

**Attachment C** 

**Include in**  **Final Addendum** 

**Include in**  **Final Addendum**  **Attaclm1ent D** 

# Attachment **B**

**Commissioner's Order**  **for Clifty**  **Creelc Generating Station**  **addressing the**  **1-hour S02**  **NAA QS**  **Jefferson County** 

### INDIANA **DEPARTMENT OF**  **ENVIRONMENTAL MANAGEMENT**  **We Protect**  **Hoosiers and Our**  **Environment.**

**Michael R. Pence**  **(JO\'«!fiiOI' 100**  **N. Senate Avenue**  **� Indianapolis,**  **IN 46204** 

**(800) 451-6027 •**  **(317) 232-8603**  **• www** **.idem.IN.gov Carol S.**  **Comer Cmumlulmwr** 



## STATE **OF IN** **DIANA COUNTY**  **OF MAR** **TON )**  **) SS:**  **) BEFORE**  **THE INDIANA**  **DEPART MENT** 

**OF ENVIRONMENTAL**  **MANA GEME** **NT**
**IN THE**  **MATTER OF:**  **) ORDER,**  **OF THE**  **COMMISSI ON** **ER )** 

**· PURSUANT**  **TO IC**  **13-14-2-1 )**  

## FOR CLIFTY **CREEK GENERATING**  **STATION )**  **OFTN DIANA**  **) )** 
**NOTICE AND**  **ORDER OF**  **THE COMMISSIONER**  **OF THE**  **DEPARTMENT OF**  **ENVIRONMENTAL MANAGEMENT**  

## TJiis **Notice ·and**  **Order of**  **the Commissioner**  **of the**  **Department of**  **Environmental Management ("Order") is issued pursuant**  **to Indiana**  **Code ("IC")**  **13-14-1-9, IC**  **13-14-2-1,** 

## and **IC 13-1**  **4-2-7.** 

## During **the Con1missi9ner's**  **review, it**  **was d�termined**  **that the**  **Petiti on**  **should be**  **granted according**  **to the**  **terms specified below:**  **PETITION** 

## Petitioner **is the**  **Indiana Ken** **tucky Electric**  **Corporation's, Clifty**  **Creek Generating**  **Station ("Peti** **tioner"), a**  **stati onary**  **electric power**  **plant with**  **Sollrce I.D.**  **Number 077-00001,**  

## located **at 1335**  

## Clifty **Hollow Road**  **in Madison,**  **Jefferson County,**  **Indiana, and**  **permi tted**  **under thePatt**  **70** 

## air **operating permit**  **program. On**  

## March **2, 2015,**  

## the **U.S. District**  **Court ror**  **the Northern District**  **of California**  **accepted a**  **Consent Decree**  **between the**  **U.S. Enviromnental**  **Protection Agency**  **("U.S. EPA"),**  **the Sierra**  **Club, and**  **the Natural**  **Resources Defense**  **Council to**  **resolve litigation**  **concerning deadlines**  **for completing**  **one (1)**  **hour sulfur dioxide**  **("S02") National**  **Ambient Air**  **Quality Standard**  **("NAAQS") designations.**  **Under the**  **Consetit Decree,**  **U.S. EPA must designate**  **certain areas**  **as nonat** **tainment, atta** **imn.ent, or**  **unclassifiable in**  **tlu·ee phases.**  **Tl1e** 

## first **Consent Decree**  **phase requires**  **U.S. EPA**  **to designate**  **areas that**  **contain st** **ationary sources**  **that had not**  **been announced**  **for retirement**  **as of**  **March 2;**  **2015** 

## and **either emitted**  **more than**  **16�000** 

## tons **of S02**  **in 2012**  

## or **eniitted more**  **than 2,600**  

## tons **of S02**  **and had**  **ati atmual**  **average emission**  **rate Of**  **more than**  **0.45** 

## pounds **of S02**  **per one**  **miliion Bri** **tish thermal**  **units (''lb/MMBtu") in**  **2012,** 

## according **to U.S.**  **EPA's Air Quality**  **Markets Data** **base.**

**An Equnl**  **Opporlunily Emjlloycr**  **1\ State U** **1 a** **t Works**  

# (i) **flecydcd f'aper** 

**-** 

# .**I Commissioner's**  **Order No**  **2016-02**

**Page2of4** 

## On **March 20,**  **2015, .**  **U.S. EPA**  **identifie**

**. d**  **five (5)**  **soilrces in**  **Indiana that**  **met the**  **criteria for**  **the first**  **phase of**  **the Consent**  **Decree design** **ations. U.S.**  **EPA's list**  **\ncluded the Petitioner, Clifty**  **Creek Generating**  **Station. ·**  

## On **September 16,**  **2015, the**  **Indiana Department**  **of Enviromnental**  **Management (''IDEM'')**  **recommended designation**  **of the**  **area surrounding**  **Clifty Creek**  **Generating Station**  **as attainment.**  **The recommendation**  **was based**  **on modeling that**  **included operation**  **of a**  **flue gas dcsulfuriz** **ation system**  **that became**  **operational in July**  **2013. ·**  

## On **January 22,**  **2016, the**  **Petitioi1er submitted**  **a request to**  **the Commissioner**  **to impose a**  **permanent and**  **enforceable S02**  **mass emission rate**  **on the**  **Petitioner in**  **order to**  **ens me**  **continued attainment**  **of the**  **S02 NAAQS**  **in the**  **area surrounding**  **Clifty Creek**  **Generating Station. The Petitioner**  **proposed a**  **facility-wide S02**  **mass emission**  **rate of**  **2,624.5 S02**  **pounds per**  **hour ("lb/hr"),**  **720 operating**  **hom rolling**  **average, applicable to**  **Unit No.**  **1 tlU'ough**  **Unit No.**  **6, combined.**  **FINDINGS** 

## Pmsuant **to IC**  **13-14-2-1 (b) and IC**  **13-14-2-7(1 ),**  **the Commissioner**  **may issue**  **Orders to**  **secure c01hpliance**  **with Indiana's**  **environmental statutes**  **and rules,**  **including th9**  **ambient air**  **quality standard for**  **S02 at**  **326 Indiana**  **Administrative Code**  **(!'lAC") 1-3-4(b)** **(1)(A). Based**  **on the**  **foregoing information,**  **IDEM finds**  **the following:**  **1. A**  **permanent and**  **enforceable S02**  **mass emission**  **rate for**  **Clifty Creek**  **Genet�ating Station**  **·** 

## is **required in**  **order to**  **model continued**  **attaimnent of**  **the one**  **(1) hour**  **S02 NAAQS**  **in the**  **ai'ea surrounding**  **the Petitio11er.**  **2. Issuance**  **of a**  **Commissioner's Order**  **will ensure**  **the S02**  **mass emission**  **mte remains**  **permanent and**  **enforceable, as**  **required by**  **42 U.S.C.**  **§** 

## 7407(d)(3)(E)**(iii). Whereas**  **revising a**  **Part 70**  **Operating Permit**  **would not**  **create �n**  **adequately "permanent"**  **requirement. 3.**  **Approval by**  **U.S. EPA**  **of the**  **Commissioner's Order**  **as pmt**  **of the**  **Indiana State Imple.menta,tion Plan**  **("SIP") will**  **make the**  **Order i·equirements**  **federally enforceable.**  **Upon approval**  **as part**  **of the**  **Indiana SIP,**  **the Order**  **requhements become**  **applicable requirements**  **as defined**  **in 326**  **lAC 2-7-'1(6).**  **·** 

## 4. **Based on**  **moctding conducted**  **by IDEM,**  **the S02**  **m�ss emission**  **rate proposed**  **by the**  **Petitioner is**  **adequate to**  **assure continued**  **attainment of**  **the S02**  **NAAQS. ORDER**  

## 1. **Thi**

**.**

**s Order**  **approves the**  **Petition submitted**  **by the**  **Petitioner according**  **to the tei·ms**  **specified below.**  **This Order**  **itnposes on**  **the Petitioner**  **the S02**  **mass emission**  **mte described**  **below. 2.**  **When any**  **of Unit**  **No. 1**  **through Unit**  **No. 6,**  **or any**  **combination thet'eof,**  **is operating,**  **the combined**  **S02 mass**  **en1ission rate**  **shaH not**  **exceed 2,624.5**  **lb/Iu·, as**  **a 720**  **operating hour**  **roHing average.** **Commissioner's Order**  **No 2016-02**

**Page 3 of4**  **3. The Petitioner shall**  **comply with**  **the 720**  **operating hour**  **rolling average**  **S02 mass**  **emission rate beginning April**  **l9, 2016.**  **4. As**  **required by**  **326 lAC**  **2.,7-2(d)( l)**  **and 326**  **lAC 2-7-5,**  **the Petitibrtei'**  **shall af>ply**  **to incorporate**  **these Order**  **requirements, including reporting**  **and recordkeeping require1nents and**  **methods to**  **determine compliance,**  **into its**  **Part 70**  **Operating Permit**  **within nin�ty (90)**  **days of**  

# ·u **.s. EPA's**  **approval of**  **the Commissioner's**  **Order as**  **part of**  **the Indiana**  **SIP. 5.**  **from April 19,**  **2016 until**  **IDEM iSS\tes**  **a Permit**  **incorpqrating these**  **Order requirements,**  **the Petitioner shall**  **comply with**  **the reporting**  **and recordkeeping**  **requirements and**  **methods to**  **determine compliance**  **specified in**  **this paragraph.** 

**a. Reporting:**  **The Petitioner**  **shall submit to**  **IDEM, on**  **a quarterly**  **basis, a**  **report of**  **the facility-wide**  **maximum 720 operating**  **houi· S02**  **rolling average**  **mass emission**  **rate for**  **each day**  **that any**  **of Unit**  **No. 1**  **tlu·ough Unit**  **No. 6,**  **or any**  **combination thereof,**  **operates, beghming**  **the second**  **quarter reporting period,**  **which is**  **July 2016.**  **b. Recordkeeping:**  **The Petitioner**  **shall maintain**  **records adequate**  **to document**  **compliance with**  **the 720**  **operating hour**  **rolling average**  

## S02 **mass emission**  **rate.**
**c. Method**  **to determine**  **compliance: Compliance**  **shall be**  **determined by**  **a continuous**  **emission monitoring**  **system (CEMS) in**  **accordance with**  **326 lAC**  **3-5; except**  **that data**  **substituted in**  **accordance with**  **40 Code**  **of Federal**  **Regulations ("CFR")**  **Part 75**  **will not**  **be consider�d**  **in this evaluation.**  **The Petitioner**  **may use**  **the existing**  **certified CEMS**  **to meet**  **this requirement.**  **6. This**  **Order shall**  **apply to**  **and be**  **binding upon**  **the Petitioner,**  **its successors**  **and assigns. No**  **change in**  **ownership, corporate,**  **or partnership**  **status of**  **the Petitioner**  **shall in**  **any way**  **alter its**  **status or**  **responsibilities under**  **this Order.**  **7. The**  **requirements of**  **this Order**  **supersede any**  **less stringent**  **requirements applicably**  **to the**  **Petitioner. ·**  

### EFFECTIVE **DATE OF**  **ORDER Pursuant**  **to IC**  **13-14 -2-l**  **(d),. IC**  **4�21.5-3-1, IC**  **4-21.5-3-5(a)(6), and**  **40 CFR**  **51.102, IDEM**  **will give**  **notice of**  **this Order**  **to each**  **entity to**  **whom the**  **Order is**  **directed and**  **atTected neighbors**  **by mniling**  **and to**  **the general**  **public by**  **web publication.**  **Pursuant to**  **IC 4-21.5�3-7(a)(3),**  **IC 4-21.5-3**  **-2(e), and**  **IC 4-21.5-3-5,**  **this Orcler**  **may be**  **appealed by**  **filing a**  **Petition for**  **review within**  **eighteen (18)**  **days after**  **the date**  **affected persons**  **were given**  **notice of**  **the Order**  **by U.S.**  **Ihai 1.**  **Information on**  **petitions for**  **review of**  **d1is Order**  **can be**  **found at**  **IC 4-21.5-3-7.** 

**Pmsuant to IC**  **4-21.5-3-S(f) and**  **IC 4-21.5-J-2(e),**  **the Order**  **is effective**  **eighteen (18)**  **days from mailing**  **of notice**  **unless a**  **Petition for**  **review has**  **been filed**  **before or**  **on the eighteenth**  **(181h) day.**  **However, the**  **compliance date**  **for the**  **S02 mass**  **emission rate**  **in this**  **Ol'der is**  **April l9,**  **2016. Pursuant**  **to 40**  **CFR 51.103,**  **IDEM will**  **submit this**  **Order to**  **U.S. EPA**  **as a**  **revision to**  **the Indiana**  **SIP. Upon.**  **approval by**  **the U.S.**  **EPA, this**  **Order will**  **be part**  **of the**  **Indiana SIP.** **Commissiouc•·'s 01'dCI'**  **No 2016-02** 

**Page4 of4 Pe.rsons**  **se eking**  **judicial review**  **of this**  **Order may**  **do so**  **in accordance**  **with IC**  **4-21.5-5**

**.. If**  **you have**  **proceclural or**  **scheduling questions**  **regarding your**  **request for**  **review, you**  **may contact**  **the Office**  **of Enviromnental**  **Adjudication at**  **(317) 232-8591.**  **If you**  **have quystions regarding**  **this Order,**  **please contact**  **Mark Derf,**  **Office of**  **Air Quality,**  **by telephone**  **at (3** 

### i **7) 233-**  **5682 or**  **email at**  **MDERF@idem.IN.gov. Dated**  **at Indianapolis,**  **Indiana this** 

# l**\ -r day**  **of**

# � **2016.**

# t6lf01S:C0111ef **Commiss ioner**  **Indiana Depmtmcnt**  **of Environmental**  **Management**

# Attachment **C**
**Public Notice**  **and Certificate**  **of Publication**  **for the**  **Commissioner's Order for Clifty**  **Creelc Generating**  **Station addressing**  **the 1-hour**  **S02 NAA** **QS Jefferson**  **County IDEM**  

### INDIANA DEPARTMENT **OF ENVIRONMENTAL**  **MANAGEMENT We**  **Protect Hoosiers**  **and Our**  **Environment.**

**Michael R.**  **Pence Governor**  **100 N.**  **Senate Avenue**  **• Indianapolis,**  **IN 46204**  **(800) 451-6027**  **• (317)**  **232-8603 •**  **www .idem.IN.gov**  **Carol s.**  **Comer Con1missioner**  **Legal Notice** 

**- Public Comment Period**  **and Opportunity**  **for Public Hearing** 

**State Implementation**  **Plan (SIP)**  **Submittal Clifty**  **Creek Generating**  **Station in**  **Jefferson County** 

**Commissioner's Order**  **No 2016-02**  **Notice is**  **hereby given**  **under 40**  **CFR 51.102**  **that the**  **Indiana Department**  **of Environmental**  **Management ("IDEM")**  **is accepting**  **written comments**  **and providing**  **an opportunity**  **for a**  **public hearing**  **regarding a**  **revision to**  **the Indiana**  **state implementation**  **plan (SIP)**  **for Indiana**  **Kentucky Electric**  **Corporation, Clifty**  **Creek Generating**  **Station, Source**  **I.D. Number**  **077-00001, located**  **at 1335**  **Clifty Hollow**  **Road in**  **Madison, Jefferson**  **County, Indiana. All interested persons are**  **invited and**  **will be**  **given reasonable**  **opportunity to**  **express their**  **views concerning**  **the proposed**  **revision to**  **the SIP.**  **The purpose**  **of this**  **notice is**  **to solicit**  **public comment**  **on a**  **proposed revision**  **to the**  **SIP that**  **is accomplished**  **by Commissioner's**  **Order No.**  **2016-02 for**  **Clifty Creek Generating Station.**  **The Commissioner's**  **Order imposes**  **a sulfur**  **dioxide emission limit**  **upon Clifty Creek**  **Generating Station.**  **This Commissioner's**  **Order will**  **be submitted**  **to the**  **United States**  **Envirorunental Protection**  **Agency ("U.S.**  **EPA") for**  **approval as**  **a revision to**  **the Indiana**  **SIP. Any**  **person may**  **submit written**  **comments on**  **the proposed**  **SIP revision.**  **Written comments**  **must be**  **postmarked or delivered**  **in person**  **on or**  **before March**  **17, 2016.**  **Any person**  **may request**  **a public**  **hearing on**  **the proposed**  **SIP revision.**  **Requests for**  **a public**  **hearing must**  **be submitted**  **on or**  **before March**  **4, 2016.**  **A hearing**  **has been**  **scheduled for**  **March 10,**  **2016 at**  **6:00 p.m.**  **eastern time. The**  **hearing will**  **occur at**  **Hanover College Science Center,**  **607 Ball**  **Drive, Hanover, Indiana,**  **Building SCC,**  **Room 136.**  **If no**  **timely request**  **for a**  **public hearing**  **is received**  **by March**  **4, 2016,**  **the hearing**  **will be**  **cancelled. Interested parties**  **can check**  **the online**  **IDEM calendar**  **at http**  **: /** **/ www** **. i**  **n .** 

**g ov/ac** **t i**  **vecal e** **ndar/Even t** **List.aspx or**  **contact Mark**  **Derf at**  **the contact**  **information listed**  **below to**  **see if**  **the hearing**  **has been**  **cancelled. Interested**  **parties may**  **present oral**  **or written**  **conunents at**  **the public hearing,**  **if held.**  **Comments and**  **suppmting documentation,**  **or a**  **request for**  **a public**  **hearing must**  **be sent**  **in writing**  **to Mark**  **Derf via**  **the information**  **provided below.**  **Please refer**  **to Commissioner's**  **Order 2016-02**  **in all**  **correspondence.**

**Mark Derf Indiana**  **Depmtment of**  **Environmental Management**  **Office of**  **Air Quality**  **100 North**  **Senate A** **venue Mail**  **Code 61-50**  **IGCN 1003**  **Indianapolis, Indiana**  **46204**

**An Equal Opportunity**  **Employer** 

# 0

**A**

### State **that�** 

# (!) **Recycled Paper** **Phone: (317)**  **233-5682 Fax:**  **(317) 233-2342**  **E-mail: MDERF@idem.IN.gov.**  **A copy**  **of the**  **Commissioner's Order**  **is available**  **to any**  **person upon**  **request and**  **is available**  **for public**  **inspection at**  **the following**  **locations:**

**Indiana Department of**  **Environmental Management**  **Office of**  **Air Quality**  **Indiana Government**  **Center-North 100**  **North Senate**  **A venue**  **lOth Floor**  **Indianapolis, Indiana 46204.**  **and Indiana**  **Department of**  **Environmental Management**  **Southeast Regional**  **Office 820**  **Sweet Street**  **Brownstown, Indiana**  **47220 and**  **Madison Jefferson County**  **Public Library**  **420 West**  **Main Street**  **Madison, Indiana**  **47250-3796 The**  **Conunissioner's Order**  **is also**  **available on**  **the IDEM**  **website at:**  **http :**  **// www** **. in** 

**.**

**g ov** **/ idem/4686** 

**. htm** 
**. For additional information, please**  **contact Mark**  **Derf at**  **the contact**  **information provided**  **above.**

### INDIANA DEPARTMENT OF **ENVIRONM ENTAL**  **MANAGEMENT We**  **Protect Hoosiers**  **and Our Environment.**  **Mitchell E.**  **Daniels Jr.**  **100 North**  **Senate Avenue**  **Governor Indianapolis,**  **Indiana 46204**  **(317) 232-8603**  **Thomas W.**  **Easterly Toll**  **Free (800)**  **451-6027 Commissioner**  **www .idem.IN.gov** 

**February 3,**  **2016**



### CERTIFICATE OF PUBLICATION **This is**  **to certify**  **that the**  **Indiana Department**  **of Environmental**  **Management (IDEM)**  **Notice of**  **the opportunity**  **for a**  **Public Hearing**  **regarding the**  **following:**

**o** 

### Co**mmissioner's Order**  **#2016-02** 

### for **Clifty Creel{**  **Generating Station**  **of Indiana** 

**was published**  **on IDEM's**  **web site**  **on February**  **3, 2016.**  **It is**  **expected that**  **it will**  **remain posted**  **on the**  **site until**  **at least**  **March 4,**  **2016. The**  **notice in**  **full was**  **available online**  **at the**  **following web**  **address, under**  **"Southeastern". http**  **:/ /** **www .**  **in**

**.**

**g ov/idem** **/ 54** **7 4** 

**. htm**  **The notice**  **was also**  **available the**  **same date**  **at the**  **following web**  **address. http://www** 

**. i**  **n .** 

**g ov** **/ idem** **/ 4686** 

**. h** **t m** 
**Web publication**  **of the**  **notice was**  **at the**  **request of**  **Scott Deloney,**  **Branch Chief,**  **Programs Branch,**  **Office of**  **Air Quality,**  **IDEM.**

**Attaclunents: Copy**  **of web**  **page as**  **publi shed.** 
**Recycled Paper**  

# @ **By:**

**Mike Finklestein**  **IDEM Webmaster** 

**An Equal Opportunity**  **Employer Please**  **Recycle** 

### Q

# Attachment **D**

**Clifty Creel(**  **Generating Station:**  **Modeling Summary**  **Jefferson County** 

### lndiana-l<entucl<y **Electric Corporation**  **- Clifty**  **Creel< Generating Station** 

**Commissioner's Order**  **Modeling Summary Background**  **Initial modeling,**  **using Clifty**  **Creek's hourly**  **Continuous Emissions**  **Monitoring (CEM)**  **data from**  **2012- 2014,**  **showed higher**  **modeled S02**  **concentrations that**  **exceeded the**  **1-hour S02**  **National Ambient**  **Air Quality**  **Standards (NAAQS). This**  **modeling included**  **emissions before**  **and after**  **Clifty Creek**  **had installed**  **their Fluidized**  **Gas Desulfurization**  **(FGD) system.**  **After consultation**  **with U.S.**  **EPA, Indiana remodeled**  **the S02**  **emissions from**  **Clifty Creek**  **after the**  **FGD system**  **became operational**  **to determine**  **the attainment designation**  **for the**  **area since**  **emission controls have**  **to be**  **in place**  **by the**  **final S02 area**  **designation date**  **of July**  **2, 2016.**  **The FGD**  **system became**  **fully operational**  **in July**  **2013. The**  **modeling period**  **was set**  **for one**  **and half**  **years from**  **July 2013**  **through December**  **2014. This**  **modeling showed**  **attainment of**  **the 1-hour**  **S02 standard.**  **Following the**  **submittal of**  **Indiana's recommendations**  **addressing the**  **Round 2**  **consent decree**  **in September**  **of 2015,**  **U.S. EPA**  **pointed out**  **a full**  **three years**  **of modeling**  **would be**  **required to make**  **a characterization**  **of air**  **quality in**  **the area**  **and emission**  **limits would**  **have to be**  **established that**  **would be**  **federally enforceable**  **and permanent.**  **Since this**  **was the**  **case, discussions**  **with Clifty**  **Creek resulted**  **in their**  **request for**  **new S02**  **emission limits**  **to be**  **established, based**  **on three**  **years of**  **meteorological data,**  **per a**  **Commissioner's Order.**  **These limits**  **would be**  **federally enforceable**  **and permanent**  **and incorporated**  **into their**  **permit at**  **a later**  **date. Modeled**  **Emission limits**  **and Results**  **The FGD**  **system controls**  **S02 emissions**  **from flue**  **gases for**  **all six**  **generating units**  **at Clifty**  **Creek. Units**  **1, 2,**  **and 3**  **are vented**  **into Stack**  **CS013. Units**  **3, 4,**  **and 5**  **are vented**  **into Stack**  **CS046. The**  **two stacks**  **are contained**  **within one**  **stack shell.**  **Base elevations**  **at Clifty**  **were reevaluated**  **based on**  **construction drawings**  **for the**  **facility. These**  **new base**  **elevations were**  **used in**  **this modeling**  **analysis. All**  **other modeling**  **parameters were**  **maintained and**  **can be**  **found in**  **Enclosure 3,**  **page 15**  **of Indiana's**  **Round 2**  **Consent Decree**  **modeling submittal,**  **dated September**  **16, 2015.**  **Three 502**  **emission scenarios**  **were modeled:**  **Scenario 1**  **was all**  **emissions emitted**  **from Stack**  **CS013, Scenario**  **2 was**  **all emissions**  **emitted from**  **Stack CS046,**  **and Scenario**  **3 divided**  **the emissions**  **equally between**  **Stack CS013**  **and Stack**  **CS046. The**  **worst case**  **modeling scenario was**  **Scenario 1,**  **represented by**  **all 502**  **emissions being**  **emitted from Stack**  **CS013. Based**  **on this**  **worst case**  **modeling scenario,**  **the emission**  **limit was**  **determined to**  **be any**  **of the**  **Units 1**  **through 6**  **or any**  **combination can**  **never exceed**  **4,670 lbs/hr**  **for the**  **1-hour 502**  **averaging period.**  **A summary**  **of the**  **three modeling**  **scenarios S02**  **emission and**  **modeling results**  **can be**  **seen below**  **in Table**  **1.**

**1 Table**  **1: Clifty**  **Creel< 1-hour**  **502 Modeling**  **Scenario Summary**  **and Results** 
**Modeled Emission**  **Rate Concentration**  **Concentration Concentration**  **Scenario Group**  **ID lb/hr**  

### J.tg/**m3 J.tg/** **m3 J.tg/** **m3 Scenario**  **1 CS013**  **4,670 195.98**  **Scenario 2**  **CS046 4,670**  **187.93 Scenario**  **3 SPLT**  **2,335.2 192.11** 

**Determination of**  **Longer Time-Averaged**  **Limits Clifty**  **Creel< requested**  **a 720**  **operating hour**  **rolling average**  **emission limit**  **that would**  **demonstrate compliance**  **among multiple**  **units and**  **model attainment**  **of the**  **1-hour 502**  **standard. The**  **reduction ratio**  **used in**  **order to**  **demonstrate an**  **equivalent 720**  **operating hour**  **rolling average**  **502 mass**  **emission limit**  **based on**  **the modeled**  **1-hour emission**  **limit is**  **discussed in**  **Clifty Creek's**  **Commissioner Order**  **request and**  **the assessment**  **process for**  **developing a**  **longer term**  **averaging period**  **limit, dated**  **January 22,**  **2016. The**  **equivalent 720**  **operating hour**  **site rolling average**  **502 emission**  **limit calculated from the**  **4,670 lb/hr**  **1-hour modeled**  **emission limit**  **was determined**  **to be**  **2,624.5 lbs**  **of 502**  **/hr.**

**2**

## Assessment Process Indiana
-Kentucky Electric Corporation Clifty Creek Station Evaluation for 720 Operating Hour Site Rolling Average SO 2 

## Mass Emissions Limits Using Flue Gas Desulfurization (FGD) Step 1: Facility Description and Modeled Limits The Indiana

- Kentucky Electric Corporation’s (IKEC’s) Clifty Creek Station has six coal

-fired electric generating units (Units 1 through 6) that were placed into commercial operation in 1955 and 1956. All six units have pulverized

-coal, front

-wall

-fired, wet
-bottom boilers and a nameplate generating capacity of approximately 217 megawatts

. Prior to being exhausted to the atmosphere, the flue gases from Units 1, 2, and 3 are combined and scrubbed for SO 2 

## removal in a jet

-bubbling reactor (JBR) scrubber. Th e scrubber for Units 1, 2 and 3 is referred to as JBR13, and the combined scrubbed flue gases from these three units is exhausted through Common Stack CS013 (also known as Flue 13). The flue gases from Units 4, 5, and 6 are combined and scrubbed in JBR46 prior to being exhausted through Common Stack CS046 (also known as Flue 46). The two flues associated with each scrubber are contained in one stack shell (Stack 14), and the emissions from each flue are represented of the combined scrubbed emissions from all six units

. The scrubbers were designed to allow the Clifty Creek Station to use local Illinois Basin coal with sulfur content in the 5 lb per mmBtu range. For modeling purposes, IKEC identified an appropriate mass emissions limit as a site average fo r the Clifty Creek Generating Station that smodels attainment of the 2010 1

-hour primary NAAQS for SO 2

## . Per the request of IKEC), Mr. Dave Long

- at American Electric Power (AEP) performed modeling using the representative Clifty Creek Station post scrubber emissions data supplied to him by OVEC. Based on numerous modeling runs, Mr. Long determined that an emission value of 2,624.6 lbs/hour as a SITE average emissions rate as averaged over a 30 day period will assist the Indiana Department of E nvironmental Management (IDEM) in complying with the 2010 SO 2 

## NAAQS.
Step 2: Compile Representative Emissions Data Set Data was obtained for hourly SO 2 

## mass emissions (lbs/hour) for each stack at the Clifty Creek Station from June 1, 2013 00:00 hour th rough December 31, 2015 23:00 hour. This starting date was chosen based upon the startup dates for each of the two JBR scrubbers that were placed into service at the Clifty Creek Station in 2013 (CS013: 3/20/2013, CS046: 5/15/2013). Since a site limit was developed for the entire Clifty Creek Generating Station, the following criteria were used to “clean up” the data set:
1. At least one unit on each stack had to be operating. Periods when only one single stack was in operation was discarded. 2. The data from each stack was obtained using either the primary or backup certified SO2 monitoring system. H ours when either stack had data generated using the missing data algorithm was discarded. 3. Two data sets were generated. One data set included all data meeting criteria 1 & 2 from June 1, 2013 00:00 hour through December 31, 2015 23:00 hour. The second data set included data

## meeting criteria 1 & 2, but only for the years 2014 and 2015, which IKEC believes is more

representative based on fuel source and operational mode

. The coal blend consumed in 2013 included a significant proportion of residual Powder River Basin coal, which is no longer consumed at the Clifty Creek Generating Station . This fuels source was still being consumed during 2013 due to contractual obl igations in place prior to the commencement of scrubber operation. Utilization of the data from this time period could result in a low biasing of SO2 emissions, which would not have been representative of future operations, nor of the design criteria for scrubbers themselves . The data for 2014 & 2015 was not impacted to a significant degree by any PRB fuel blending and therefore is more representative of expected longer term fuel source and future operations. Step 3: Calculate 720 Operating Hour Site Roll ing Average After sum ming the hourly mass emissions for SO 2 

## from each stack, this data was then used to calculate a 720 Operating Hour Site Rolling Average mass emission value for each hour in the data collection period. The “cleaned up” data set resulted in a 720 Operating Hour Site Rolling Average that did not include hours where valid data was not available from both stacks and did not include hours where only one stack was operating. It should be noted that there are n o values calculated for the first 720 hours of the data set. Step 4: Calculate the 99th 

## Percentile Values The 99th 

## percentile values were calculated for the 1

-hour site emissions data set and the 720 Operating Hour Site Rolling Average. The Site 1 Hour Data set the 99th 

## Percentile value was determined to be 2,394 lbs/hour. The 720 Operating Hour Site Rolling Average data set the 99 th 

## Percentile Value was determined to be 1,346 lbs/hour. Step 5: Calculate the Ration of the 99th 

## Percentile Values Divid ing the 99th 

## percentile value of the 720 Operating Hour Site Rolling Average by the 99 th 

## percentile value for the Site 1

- Hour Data yields a quotient of 56.2%. 1,346 lbs/hour / 2,394 lbs/hour *100%= 56.2% Discussion The attached graph shows the 720 Operating Hour Site Rolling Average and the 2,624.5 lbs/hour modeled value trended alongside the 99 th 

## percentile value for this particular data set. IKEC proposes that the value of 2,624.5 pounds per hour (2,624.5 lb/hr) Site Average mass SO 2 

## emission rate be uti lized for the IDEM Commissioner’s Order. This compliance value would be an unweighted average calculated by IKEC using data collected by existing certified CEMS. Data used for determining this compliance value will be unbiased data. Additionally, data ge nerated the using Part 75 Missing Data Algorithms will not be used to determine compliance . This is analogous to the manner in which data is handled under the existing Part 60 and MATS programs, which are utilized by IKEC for Title V and MATS compliance de monstration. The hourly data should be calculated as a 720 operating hour site rolling average. IKEC also believes the Commissioner’s Order should state that IKEC is not out of compliance during periods where the certified CEMS is not producing valid data for both stacks if the scrubber parametric data remains within the limits listed below:

### Normal operation of either JBR reactors shall be deemed to be (a) Slurry level at or between the range of 19.33 to 21.06 feet , and ; (b) Slurry pH at or between 4. 0 S.U. to 6.5 S.U.**10000**

# I **Hour y**  **te 502**  **Mass Emiss**  **ons (pounds** **) from**  **Ja n**  **uary 1** **, 2014**  **h rough**  **December 3 1** **, 2015** 

# 1

# �== **====== ==**  **== ==**  **==== ==�**  **-------**

**� +----------------------------------------------------------------------------r------------------** **MOO +---------------------------------------------------------------------------�------------------** 

**� �--------------------------------------------------------------------��---r------------------** 
**� ----------------�------------------------------------------------**  **+- --**  **-----------------**

**� �----------------��------------------------------------------------��---r------------------** 

**1000 2SOO**  

# 1 **24 Hour**  **Roll i**  **ng Average**  **502 Mass**  **Emiss i** **ons (pounds)**  **from Januar** **y 1,**  **2014 through**  **December 31,**  **2015** 

# 1**2000** 

# �**�**

# �**llU** 

# �

# �1r**r**

# � **�� �** **1SOO**

**1000**

# I **\ 600**  

# I **no Hour**  **Roll i**  **ng Average**  **502 Mass**  **E m** **i ss**  **i ons**  **(pounds) from**  **January 1,**  **2014 through**  **December 31,**  **2015** 

# 1

**.....**



# 600**+-----------------------------------------------------------------------------------------------**

**� +-----------------------------------------------------------------------------------------------** 

**bOO +-----------------------------------------------------------------------------------------------**  **Figure 4** 

**- Sum of Plant**  **S02bs/lv Emissi** **ons**

**- 99th**  **Percent il** **e V�ue**  **of Hourty**  

### 0...

**- PI"oposedi.Mnit**  **5.000 lbs/hr**

**Figure 5** 

**- 24 Hour**  **Ro lli** **ng Average**

**- 99th Percenti'e**  **Vakleof24 Hour Rol** **l inc**  **Aver;ageOiU**

**Figure 6** 

**- no Hour**  **Ro lli** **ng Average**

**- 99th Percenti'e**  **Vakleof120 Hour Rol** **l inc**  **Aver;ageOiU 1000.0**  **24 Hour**  **Ro ll**  **i ng**  **Average 502**  **Mass Emissions**  **(pounds) from June**  **1, 2013**  **t hr** **o u**  **g h**  **December 31,**  **2015**


# »**+----------+----------------------------------------------------------------------------------------------------**
**� »**  **t----------1----------------------------------------------------------------------------------------------------**
**� »**  **t----------1----------------------------------------------------------------------------------------------------**

**� »** **+----------1----------------------------------------------------------------------------------------------------**

**» +----------+----------------------------------------------------------------------------------------------------** 

**1600.0**



# »**+---+----------------------------------------------------------------------------------------------------------- Figure**  

# 2**24 H**  **ou r** **Rol c**  **Average**

**- 99th**  **Percent le**  **Value of z•**  **Ho u**  **r oling**  **Average Data** 

**Figure 3 o**  **Ho u**  **r inc**  **Average**

**- 99th** **Percent le**  **Value of 720**  **Hour o**  **Jinc Average**  **Data 720 How**  **Aollq Awnp 502**  **Mass Emissions (pounds)**  **from June**  **1, 2013**  **throuch December 31,2015** 



# �D **t----------------------------------------------------------------------------------------------------------------**

**�D t----------------------------------------------------------------------------------------------------------------** 

**U.D t----------------------------------------------------------------------------------------------------------------** 

**OD �--L------------------------------------------------------------------------------------------------------------**  **- T.IOHour�--** 

**- --llt\lol��e**  **fiiT.IO Hout RCIII** **.. -.... Data**