**John R .**  **Kasich ,**  **Governor Mary** **Taylor, Lt** 

**. Governor**  **Craig W. But l** **er ,**  **D i** **rector**

**March 26,**  **2015 George** **Czerniak Director,**  **Air &**  **Radiation Division**  **USEPA Region**  **5 77** **West Jackson**  **Boulevard Mail**  **Code: A-18J**  **Chicago, IL** 

**60604-3507**

## Ano **nU 0**  

## 11!"!**15 l\** **o v** 

**RE: Clarification**  **on June**  **19, 2014**  **Ohio State**  **Implementation Plan**  **(SIP} Submittal**  **Regarding Ohio**  **Administrative Code**  **(OAC) Chapter 3745-31**  **known as**  **the PM2.5**  **SIP Submission; various**  **rule clarifications**  **Dear George:**  **On June**  **19, 2014**  **Ohio EPA**  **submitted the**  **above referenced**  **regulations for**  **incorporation into**  **Ohio's SIP.**  **This letter**  **intends to**  **clarify Ohio's**  **intent with**  **various rules**  **as discussed**  **in July**  **1, 2014**  **and August**  **26, 2014**  **calls between**  **Ohio EPA's**  **Division of** **Air Pollution**  **Control (DAPC)**  **and Region**  **5 staff.**  **A synopsis**  **of the** **discussion of** **each rule**  **and DAPC's**  **response are**  **listed below.**  **Ohio Administrative**  **Code (OAC}**  **paragraph 3745-31-01(MM},**  **definition of**  **"emergency": Region**  **5 commented** **that DAPC's**  **definition of**  **emergency in**  **OAC Chapter**  **31 does**  **not match**  **the definition** **found in**  **40 CFR**  **70.6(g)(1 )** 

**. DAPC's**  **intent with**  **including a**  **definition of**  **"emergency" in**  **OAC Chapter**  **31 was to**  **clearly define situations**  **in which**  **an emergency**  **internal combustion**  **engine could**  **operate under** **the permit**  **exemption and**  **permit-by-rule found**  **in OAC**  **rule 3745-31-03.**  **We defined**  **emergency to**  **include the**  **examples given**  **in 40**  **CFR Part**  **60, Subpart**  **1111, the**  **standards of**  **performance for**  **new stationary**  **compression ignition**  **internal combustion**  **engines, 40**  **CFR Part**  **60, Subpart**  **JJJJ, the**  **standards of**  **performance for**  **new stationary**  **spark ignition**  **internal combustion engines,**  **and 40**  **CFR Part**  **63, Subpart**  **ZZZZ, the**  **National Emission**  **Standards for**  **Hazardous Air**  **Pollutants for**  **Reciprocating Internal**  **Combustion Engines,**  **where these**  **rules state,**  **"Examples include**  **stationary [R]ICE**  **used to**  **produce power**  **for critical**  **networks or**  **equipment (including**  **power**

**SO West** **Town Street**  **• Su** **i te** **700 •**  **P**

**. O** 

**. Box**  **1049 •**  **Columbus, OH** **43216-1049**

**www .** **epa .o** **hio**

**. gov**  **• (614)** **644**

**- 3020**  **• (614)**  **644 -** **3184 (fax)** **George Czerniak,**  **Director, Air**  **& Radiation**  **Division SIP**  **clarification letter**  **Page 2**  **supplied to**  **portions of**  **a facility)**  **when electric**  **power from**  **the local**  **utility (or** **the normal**  **power source,**  **if the**  **facility runs**  **on its**  **own power**  **production) is**  **interrupted, or**  **stationary [R]ICE**  **used to**  **pump water**  **in the case** **of a** **fire or** **flood, etc:'**  **We believe**  **that the scenarios presented**  **under our**  **definition of**  **emergency mirror**  **these situational**  **examples as** **given in**  **the NSPS**  **and NESHAP,**  **As stated**  **in our**  **rule: "Emergency"**  **means: "An**  **emergency caused**  **by flooding,**  **damaging winds**  **or tornado,**  **fire, or**  **other natural** **disaster." We**  **believe this**  **language in**  **our rule** **coincides with**  **the language,**  **"in the**  **case of** **a fire**  **or flood, etc.,"**  **in the** **federal NSPS and**  **NESHAP rules.**  **Also: "An**  **electric power**  **outage due**  **to a**  **failure of**  **the electrical**  **grid, local**  **supply equipment** **failure, facility** **equipment failure**

**... "**  **This language**  **coincides with**  **the language,**  **"when electric**  **power from**  **the local**  **utility (or**  **the normal**  **power source,**  **if the**  **facility runs**  **on its**  **own power**  **production) is**  **interrupted" in**  **the federal**  **NSPS and**  **NESHAP rules.**  **This definition**  **for "emergency"**  **found in**  **OAC rule**  **3745-31-01 is**  **only applicable**  **the permit**  **exemption found**  **in OAC**  **paragraph 3745-31-03(A)(1)(nn)**  **and the**  **Permit-by-rule found**  **in OAC**  **paragraph 3745-31-03(A)(4)(b).**  **The definition**  **of "emergency"**  **in Chapter**  **31 does**  **not relate**  **to, interfere**  **with or**  **revise the**  **Part 70** **definition of** **"emergency". OAC**  **Paragraphs 3745-3** **1-01 (QQQQ),**  **(JJJJJ), and**  **(BBBBBB), definitions**  **of "permanent",**  **"quantifiable" and**  **"surplus": Region**  **5 commented**  **that DAPC's**  **definitions of**  **"permanent", "quantifiable"**  **and "surplus"**  **in OAC**  **Chapter 31**  **are not**  **defined in**  **any federal**  **rule, and therefore**  **believes that**  **these definitions**  **need not**  **be incorporated**  **into the**  **SIP. DAPC**  **included definitions**  **for "Quantifiable",**  **"Permanent", "Surplus"**  **in order**  **to clarify**  **the verification**  **process for**  **an emission**  **reduction credit**  **(ERC) used**  **for offsets**  **under Nonattainment**  **New Source**  **Review. Ohio**  **EPA withdraws**  **these definitions**  **for incorporation**  **into the**  **SIP, and**  **the definitions**  **will serve**  **only as**  **clarifications for**  **our ERC**  **Trading and**  **Banking Program.** **George Czerniak,**  **Director, Air**  **& Radiation**  **Division SIP**  **clarification letter**  **Page 3**  **OAC Paragraph**  **3745-31-01(TTTTT), definition**  **of "semi-public**  **disposal system":**  **Region 5**  **commented that**  **OAPC's definition**  **of "semi-public**  **disposal system"**  **is unnecessary**  **as this** **term is**  **not referenced**  **in any**  **rule under**  **OAC Chapter** **31. OAPC is**  **planning to**  **add a**  **new exemption**  **to OAC**  **rule 3745-31-03**  **that references**  **the term**  **"semi-public disposal system."**  **Because rule**  **3745-31-01 was**  **being revised**  **ahead of**  **the changes**  **to the**  **3745-31-03 rule,**  **we decided**  **to go**  **ahead and**  **include the**  **new exemption**  **into 31-01**  **so that**  **additional rulemaking would**  **not be**  **needed later.**  **The new**  **definition will**  **be used**  **only if**  **and when**  **the new**  **exemption becomes**  **effective. OAC**  **paragraph 3745-31-10(A)(1)(c)** **: Region**  **5 commented**  **that the**  **citation for**  **(GGGGG)(c) is**  **incorrect and**  **should be**  **(GGGGG)(3). Ohio**  **EPA agrees**  **and will**  **revise the**  **rule at** **the next**  **opportunity. OAC**  **Paragraphs 3745-31-22(A)(3)(b)**  **and 3745-31-26(0):**  **Region 5**  **commented that**  **in order**  **for states**  **to set**  **interpollutant offset**  **ratios for**  **PM2.5, they**  **must first**  **prepare an**  **analysis and** **justification for** **the proposed**  **ratios. Since**  **Ohio EPA has**  **not yet**  **prepared the**  **analysis, U.S. EPA**  **cannot approve**  **the offset**  **ratios listed**  **in the**  **rule under**  **paragraph 37** **45-31-26(0). Ohio**  **EPA understands**  **that U.S.**  **EPA cannot**  **approve the**  **PM2.5 interpollutant offset**  **ratios at** **this time.**  **As such,**  **OAPC withdraws**  **OAC paragraphs**  **3745-31-22(A)(3)(b) and**  **3745-31-26(0) for**  **approval into**  **the SIP.**  **We will**  **resubmit these**  **paragraphs for**  **inclusion in**  **the SIP**  **when we**  **have demonstrated**  **justification for the**  **PM2.5 offset**  **ratios. OAC**  **Paragraph 3745-31-23(A):**  **Region 5**  **would like**  **further explanation**  **as to**  **why Ohio**  **EPA chose**  **10 1-1g/m** **3 as**  **the significant**  **impact level**  **(SIL) 1-hour**  **averaging time** **for N02.**  **It is**  **our understanding**  **that, at**  **this time,**  **U.S. EPA**  **does not**  **require the**  **1-hour N02**  **SIL to**  **be included**  **in the**  **SIP. As**  **such, Ohio**  **EPA is**  **withdrawing the**  **1-hour N02**  **SIL as**  **described in**  **the table under**  **paragraph A**  **of OAC**  **rule 3745-31-23**  **from inclusion**  **in the**  **SIP. OAC**  **Paragraphs 3745-31-24(F)(1)(a)**  **and 3745-31-27(A)(1)(b):**  **Region 5**  **commented that**  **the language**  **"legally and**  **practicably enforceable by**  **the state"**  **does not**  **follow U.S. EPA**  **guidance for**  **establishing offsetting emissions**  **reductions. George**  **Czerniak, Director,**  **Air &**  **Radiation Division**  **SIP clarification**  **letter Page**  **4 Ohio**  **EPA has**  **reviewed U.S.**  **EPA guidance**  **and determined**  **that current**  **U.S. EPA**  **policy is**  **to require**  **offset emissions**  **reductions to**  **meet the**  **"federally enforceable"**  **tests as**  **opposed to**  **the "legally**  **and practicably**  **enforceable by**  **the state"**  **tests. As**  **such, we**  **are asking**  **U.S. EPA**  **not to**  **include OAC**  **paragraphs 37** **45-31-24(F)(1 )(a)**  **and 37** **45-31- 27(A)(1** **)(b) into the**  **SIP. Based**  **on our**  **discussions with**  **U.S. EPA**  **Region 5**  **staff, and,**  **based on**  **the above**  **supporting information,**  **Ohio EPA**  **believes U.S.**  **EPA will**  **be able**  **to move**  **forward with**  **proposing to**  **approve the**  **inclusion of**  **Ohio EPA's**  **PM2.5 rule**  **package into**  **the SIP.**  **If you**  **have any questions please feel**  **free to**  **contact Sudhir Singhal at**  **614-644-3684. Sincerely,**  

# f�;�·

**Robert F.**  **Hodanbosi Chief,**  **Division of** **Air Pollution**  **Control**

**cc: Michael**  **Hopkins, Assistant**  **Chief, Ohio**  **EPA Division**  **of Air**  **Pollution Control**  **Sudhir Singhal,**  **DAPC**