# h!2

**Protection A** **gency**



## FEB **2 9 2016** 

**Mr. George**  **Czerniak John R. Kasich,** **Governor Mary** **Taylor, Lt. Governor**  **Craig W.** **Butler, Director** 

**Director, Air**  **and Radiation**  **Division U.S.**  **EPA Region**  **V** 

## 77**W. Jackson**  **Blvd. Chicago,**  **IL**

## 60604 **Re: Supplemental**  **Information for**  **the Request**  **for Approval**  **of Amendments**  **to Paragraph**  **(ODD) of**  **Ohio Administrative**  **Code (OAC)**  **Rule 3745-21-09**  **into Ohio's**  **State Implementation**  **Plan (SIP)**  **Dated July**  **15, 2015.**  **Dear Mr.**  **Czerniak: To**  **aid you**  **in your**  **review of**  **Ohio's July**  

## 15, **2015 submittal**  **to revise**  **its State**  **Implementation Plan**  **(SIP) submittal to**  **remove the**  **requirements for**  **Stage II**  **vapor recovery**  **(Stage II)**  **in the**  **Cleveland, Cincinnati,**  **and Dayton**  **areas, please accept the** **following additional**  **information. The**  **Ohio Stage**  **II program**  **was originally**  **implemented to**  **address the**  **ozone National**  **Ambient Air**  **Quality Standards (NAAQS)**  **through the**  **reductions of**  **volatile organic**  **compound (VOC)**  **emissions from**  **controls at**  **gasoline dispensing**  **facilities (GDFs).**  **VOCs mainly**  **contribute to**  **the formation**  **of ground-level**  **ozone but**  **to a**  **lesser extent,**  **VOCs also**  **contribute to the**  **formation of**  **particulate matter**  **(PM) although**  **the extent**  **of the**  **contribution varies**  **significantly by**  **location or**  **region within** **the United**  **States. While**  **VOC is**  **one of**  **the precursors**  **for PM**  **(NAAQS) formation,**  **a study**  **(Journal of**  **Environmental Engineering** 

**- Quantifying the**  **sources of**  **ozone, fine**  **particulate matter,**  **and regional**  **haze in**  **the Southeastern United States, June**  

## 24, **2009) indicates**  **that in**  **portions of**  **the Midwest**  **(including portions**  **of Ohio)**  **where Stage**  **II has**  **been implemented,**  **emissions of**  **direct fine**  **particulate matter**  **(PM2.5) and**  **the precursor**  **sulfur dioxide**  **(S02) are**  **more significant**  **to ambient**  **PM2.s concentrations**  **than nitrogen**  **oxides (NOx)**  **and VOC.**  **Specifically, PM2.** **s sensitivities**  **to anthropogenic**  **VOC emissions**  **are near**  **zero for**  **the entire**  **region, including**  **the Cincinnati**  **region. This**  **study also**  **indicated that**  **the impact**  **of S02**  **emissions, especially**  **from electric**  **generating units,**  **was most**  **significant in**  **the Cincinnati**  **area due**  **to S02**  **emissions in**  **the entire mid-west**  **region (Wisconsin, Illinois, Indiana, Michigan**  **and Ohio).**  **In fact,**  **emissions from**  **the mid-west**  **had the**  **largest effect**  **on PM2.5**  **sensitivities in**  **the Cincinnati**  **region. For** **this reason,**  **a similar**  **impact is**  **expected in**  **the Cleveland**  **and Dayton**  **areas. The**  **technical analysis**  **provided has**  **met U.S.**  **EPA's guidance**  **and demonstrates anthropogenic**  **VOCs are**  **insignificant to** **the formation** **of PM2.5**  **in these**  **areas.**

**50 West** **Town Street**  **• Suite**  **700 •**  **P.O. B o** **x 1049**  **• Columbus,** **OH 43216-1049** 

**epa.ohio.gov •**  **(614) 644-3020**  **• (614)**  **644-3184 (fax)** **The Ohio**  **Environmental Protection**  **Agency (Ohio**  **EPA) has**  **evaluated the**  **impact of** **the Stage** 

**II SIP**  **revision on**  **air emissions**  **as part**  **of a**  **Clean Air**  **Act (CAA)**  **section** 

## 11**O(i) analysis,**  **and has**  **determined that**  **the removal**  **of Ohio's**  **Stage II**  **program will**  **not interfere**  **with the**  **attainment or**  **maintenance of**  **the 8-hour**  **ozone or**  **PM2.5 NAAQS,**  **or any**  **other applicable**  **requirement of** **the CAA**  **in either** **the Cleveland,**  **Cincinnati, or**  **Dayton areas.**  **Any temporary**  **VOC emissions**  **increases resulting** **from the**  **removal of** **the Stage**  **II systems**  **at GDFs**  **before the**  **January** 

## 1,**2017 widespread**  **use date**  **are being**  **offset through**  **the installation**  **of low**  **permeation hoses**  **on all**  **gasoline dispensing**  **facilities during**  **the decommissioning**  **process. In**  **addition, based**  **on our**  **evaluation the**  **revisions to**  **the Ohio**  **Stage II**  **program do**  **not affect**  **attainment or**  **maintenance of**  **the carbon**  **monoxide ,**  **nitrogen dioxide,**  **lead, PM**  **or sulfur**  **dioxide NAAQS. Please contact**  **Bob Hodanbosi** **if you**  **have any**  **questions about** **this submittal.**  **Sincerely,** 

# /Utt

# �/Zkt_**.**
**Robert Hodanbosi**  **Chief Division**  **of Air**  **Pol l** **ution Control,**  **Ohio Environmental**  **Protection Agency**