STEVEN A. THOMPSON Executive Director

December 5,2007 OKLAHOMA 3FPLfiTIIFNT SF -YVRONh"ENTAl CL~L Ti 

### OKLAHOMA DEPARTMENT OF ENVIRONMENTAL QUAI-ITY

Guy Donaldson, Chief, Air Planning Section Mail Code (6PD-L) USEPA Region 6 1445Ross Avenue, Suite 1200 Dallas, Texas 75202-2733 BRAD HENRY Governor

Subject: Oklahoma's Section 110(a) (2) (D) Transport SIP & 2 CAA Section 110 (a) (1) and (2) -Certification ofAdequacy of Oklahoma's SIP -i_m P; Dear Mr. Donaldson,

The purpose of this letter is to resolve two outstanding SIP issues. It will provide the additional information needed for approval of our transport SIP. Also, it will address the adequacy of Oklahoma's existing SIP to meet the requirements in CAA Section 110(a) (1) and (2).

Please find enclosed the additional information requested by your staff. The enclosure should be combined with our original transport SIP submittal (May 2007) and will provide additional assessments of Oklahoma's impact on the nearest modeled 2010 nonattainment areas. The enclosure is comprised of three parts and will add anew Part 7to Chapter 111, SectionA and new AppendicesG and H.

We have evaluated our existing SIP for implementation of the 1997 8-hour ozoneNAAQS to determine if it includes all the requirements in Section 110 (a) (1) and (2) of the CAA and is consistent with the guidanceprovided to the Regional Air Division Directors from William T. Harnett, Director, Air Quality Policy Division on October 2, 2007. We conclude and certify that our SIP does meet these requirements. Over the next few months, we will be evaluating the particulate matter provisions of our SIP for consistency with federal requirements and will provide updates during our regularly scheduled AQDlEPA6 SIPplanning conference calls.

If you have any questions concerning this matter, please feel free to contact Cheryl Bradley or Leon Ashford at 405-702-4100.

Sincerely,

~ddie 

## erri ill Division Director

Enclosures

707 NORTH ROBINSON, P.O. BOX 1677, OKLAHOMACITY, OKLAHOMA73101-1677

printed on recycled paper wrth soy ink *, '.a

# State 

# of Okla,homa Interstate Transport SIP Part 7 

# December 4,2007

This additional information clarifies the State of Oklahoma Air Quality State Implementation Plan (May 2007) which addresses interstate transport for the 8- hour Ozone and PM2.5 National Ambient Air Quality Standards.
The following three pages are to be added as a new part 7, consisting of pages 701, 702, and 703, to be inserted between pages 7 and 8 of the May 1, 2007 submittal.

Oklahoma Interstate Transport 

### SIP for 8-hour Ozone and PM2.5 NAAQS 20077. Additional Information

The Clean Air Act requires that all states address interstate transport when a NationalAmbient Air Quality Standard is changed. EPA conducted modeling for its CAlR rule and identified areas that would not attain the ozone and PM2.5standards in the year 2010. EPA guidance requires an assessment of the impact of Oklahoma's emissions on those areas. The closest down-wind 2010 nonattainment area is Kenosha County, Wisconsin. Denton and Tarrant Counties in Texas are the closest up-wind 2010 CAlR nonattainment areas.

Kenosha County, Wisconsin
Currently, Kenosha County only has one ozone monitor (55 - 059 - 0019). In the CAlR modeling, EPA developed modeling design values (more stable values which are less affected by one good or bad year), which are the average of three design values as the basecase value. The modeling design values for the Kenosha monitor are listed below.

From these numbers it is clearly evident ,thatthe Kenosha monitor's 2010 modeling design value should bewell below the 91.3 ppb predicted by the CAlR modeling. In fact, the actual design value for 2004 - 2006 was 83 ppb (demonstrating attainment), and the 2005 - 2007 design value was just over the attainment value at 85 ppb. In the analysis in the Technical Support Document for the Final Clean Air Interstate Rule (March 2005) on pages 31 and 32, there is a list of the 2010 nonattainment areas and the percent of 8-hour ozone due to transport. Kenosha is
one of the lower values at only 37%.
Although the impact of Oklahoma's emissions was not assessed for ozone in the CAlR modeling, it was assessed for PM2.5. Kenosha County, Wisconsin is not a PM2.5 nonattainment area, but nearby Cook County, Illinois is. Cook County is separated from Kenosha County by Lake County, Illinois, which is less than 25 miles wide. The impact of Oklahoma's emissions on PM2.5nonattainment areas was assessed and found to have no impact on Cook County.
Back trajectories were performed for the ozone monitoring site in Kenosha County, Wisconsin for the years 2001
- 2007 (see Appendix G). The trajectories were run at 100, 500 and 1000 meter elevations for the preceding 96 hours, and at hour 21 UTC for all of the days that the Kenosha ozone monitor recorded an 85 ppb or greater 8-hour averqge. Of the 56 trajectories, only 10 (1 8%) passed through any

Oklahoma Interstate Transport SIP for 8-hour Ozone and PM2.5 NAAQS 2007 701part of Oklahoma. Of those trajectories, only 2 (3.6%) show Oklahoma to be less than 48 hours up-wind, and only 2 (3.6%) show the lowest level (100 meters) passing over Oklahoma. A majority of the trajectories show that once the air parcel leaves Oklahoma, it travels over many other states before passing over Kenosha County, Wisconsin. Below is an excerpt of the list of states and their CAIRmodeled 2010 ozone precursor emissions from Appendix B. These are the states most relevant in the analysis of these trajectories, listed by their order in the trajectory paths.
VOC (tons per year) NOx (tons per year)

0klahoma 228,925 328,449

Kansas 1 57,354 310,273

Missouri

lowa 233,847 1 87,024

Illinois 530,864 558,324

Denton and Tarrant Counties, Texas

From Final Report DALLAS- FT. WORTH TRANSPORT PROJECT (April 6, 2004)'

On page 3-10 under TRAJECTORY ANALYSES CONCLUSIONS, two irr~portant concepts listed for this CAIR 2010 nonattainment area are:

Under prevailing wind directions during high ozone events, up-wind sources lie to the east, southeast, and south of the core urban area, consistent with the spatial pattern of measured ozone design values. Trajectory analyses show that high ozone value events in DFW are associated with slow moving air parcels originating primarily from the east, southeast and south of the metropolitan area.

On page 4-13 under COMPARISON OF ANTHROPOGENIC ATTRIBUTIONS WITH ZERO-OUT RESULTS, there is a list of all significant anthropogenic source groups impacting the Counties of Denton and Tarrant. The State of Oklahoma is not on the list.

In the technical report, Dallas-Fort Worth Nonattainment Area Ozone Conceptual Model, Executive Summary,the second paragraph states:

Stoeckenius, Till and Yarwood, GregFinal Report Dallas-FT Worth Transport Project Iittp,:/lilcs.har~ ,cd~'~~_r~)i<(.~~j~.Q.up!i_t~ji.'[pi~:,c tsi11_~)2?. 

### ~?_~J~,!.~~)~~~12?~>~f~"y':,~i gillKcqo1t~1xi. 2004.

. . ..

Oklahoma Interstate Transport SIP for 8-hour Ozone and PM2.5 NAAQS 2007 702

### Meteorology has an enormous impact on ozone formation and transport. On eight-hour exceedance days in the DFW area, the afternoon winds are typically light and come primarily from the east through the southeast. These afternoon wind patterns help to explain the location of the highest eight-hour ozone design values, which, based on 2005 data, occurred on the northwest side of the DFW area. The lowest eight-hour ozone design values occurred on the southeast side of the DFW area. As the light afternoon winds cross through the area from the east through the southeast on eight-hour exceedance days, the ozone concentrations increase until the highest levels are detected on the northwest side of the DFW area.
Appendix 

### H consists of a graphic from page 3-3 

### of Dallas-Fort Worth Nonattainment Area Ozone Conceptual Model, 

### which demonstrates where air masses usually come from on days that the Dallas-Fort Worth area records an 8- hour ozone value equal to or greater than 85 ppb. Page 2 of Appendix 

### H lists all of the major sources and their emissions that are located within the 50 - 

### 100endpoint density plot area in Oklahoma and provides a comparison of the emissions of that
area to the emissions of the State of Texas.

Conclusion 

### The State of Oklahoma has a less than significant impact on all 2010 CAIR nonattainment areas for ozone and PM2.5.

Oklahoma Interstate Transport SIP for 8-hour Ozone and PM2.5 NAAQS 2007 703

# State of Oklahoma InterstateTransport SIP Appendix G 

# December 4,2007

This additional information clarifies the State of Oklahoma Air Quality State Implementation Plan (May 2007) which addresses interstate transport for the 

### 8- hour Ozone and PM2.5 National Ambient Air Quality Standards.

The following 56 pages are to be added as a new Appendix G to be inserted behind Appendix 

### F of the May 

### 1, 2007 submittal.

### NOAA HYSPLIT MODEL 

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Trajector Direction Backward Duration:36 hrs Meko Data EDAS Vertical dotion Calculation Mahod McdelVertical Velm~ty Producedwith HYSPLIT from the NOAA ARL Website [httu i,!www arl noaaawireadvll 

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~ ~ Job ID:349293 Job Start: Thu Se 20 4 9:40:12GMT 2007 Source 1 lat.:42.5037 Ion.:-87.8093 

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0711 5 07/14 07/13 07112 Job ID:349315 Job Start:Thu Se 20 19:41:13 GMT20W Source 1 la*.:425047 Ion.: -87.8093k~ts: 100;500;1000 rn AGL

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Trajector Direction Gackward Duration:96 hrs Meko Data. EDAS Vertlcal dotton Calculation Method ModelVert~cal Velcc~ty Producedwith HYSPLITfrom the NOAA ARL Website I htto r'r'www arl nnaa aw:rearhrll 

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06123 06/22 OEjj2 1 MRO Job ID:349599 Job Start:Thu Se 20 19:%:34 GMT2007 Source 1 lat : 42.5047 Ion.:-87.8093 

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## Sep 05 ERAS Meteor-ologicalData18 12 06 00 18 12 06 00 18 12 06 00 18 12 06 00 09/12 0911 1 09110 09/09 Job ID:351552 Job Start: Thu Se 20 22:23:35 GMT 2007 Source 1 1at.:42.5047[on.:-87.80% 

# E gts: 100!500! ~~OO~AGL Trajector Qirection Backward Duration 96 h,rs Meteo Data EDAS40 Vertical dot~on Calculahon Method MdelVert~cal Velmlty Producedwith HYSPLIT from the NOM ARL Website (http lr'www arl noaagmfreadyl)

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# State of Oklahoma Interstate transport SIP Appendix H 

# December 4,2007

This additional information clarifies the State of Oklahoma Air Quality State Implementation Plan (May 2007) which addresses interstate transport for the 

### 8- hour Ozone and PM2.5 National Ambient Air Quality Standards.
The following two pages are to be added as a new Appendix H to be inserted behind Appendix G of the May 1, 2007 submittal.

## Trajectory 

## Density for the 

## DFW Region

Years of 2001

## - 2004 Hgts 100,500 & 1300 meters Start Time 21:00GTM (Midday Local Time) 36 Hours Backtrajectoriescentered at Hinton

uo All Days



## MI, Dayswith Ozone >= 85 ppb



### PageH-1fips county Plant lat Ion NOx VOC 40023 Choctaw Co INTEGRATED RAILWAY PRODUCTS 34.01 74 -95.5367 5 9 40023 Choctaw Co WESTERN FARMERS ELECTRIC COOP 34.01 36 -95.31 98 5,362 52 40089 McCurtain Co WEYERHAEUSER COMPANY 33.9997 -95.1 151 2,637 493 40089 McCurtain Co GEORGIA-PACIFIC CORP. 33.9281 -94.8691 19 1 54

Year 1999 data Oklahoma total 8,024 709

Texas total 866,019 187,983

Page H-2