I£PAATIACHMENT NO._L 

### ILliNOIS ENVIRONMENTAL PROTECTION AGENCY 1021 North Grnnd Avenue East, P.O. Box 19276, Springfield, Illinois 62794-9276 • (217) 782-2829 james R. Thompson Center, 100 West Randolph, Suite 11-300, Chicago, IL 60601 • (312) 814-6026 217/785-4140 217/782-9143 (IDD) June 2, 2011 PAT QUINN, GOVERNOR

Ms. CherylA. Newton, Director Office ofthe Airand Radiation Division U.S. Envirotunental Protection Agency, RegionV (R18J) 77WestJacksonBoulevard Chicago, Illinois 60604-3507 Dear·

### Ms. Newton: OnbehalfofGovernor Quinn and pursuantto theU.S. Environmental Protection Agency's revision totheNationalAmbientAirQuality Standards (NAAQS) for S02 dated June 2, 2010, I am submitting ourrecommendations for attainment andnonattainrnentdesignations for the State ofIllinois. Includedwith theserecommendations is supporting documentationpreparedby theillinoisEnvironmental ProtectionAgency (Illinois EPA). The Illinois EPAis also providiog this documentation to your staffin electronic format to faCilitate yourtimely review. Specifically, the followiilg designations are recommendedfor illinois: Connty

### (Partial) Tazewell County: 

## • Pekin and Cincinnati Townships 

## • RemainderofTazewell County La Salle County: 

# • La Salle Township 

# • Remainder ofLaSalleCountv CookCounty: 

# • LemontTownship 

# • .Remainder ofCookCounty Will County: 

## • Lockport and DuPageTownships 

# • Remainder ofWill County Madison Countv: 

## • Chouteau andWoodRiver 

## • RymainderofMadisonCounty All OtherCounties

Rod.ic:in::l• 43C!2 N. Main St., Rockford, IL 61103 • (815) 987-7760 Bgin• 595 S.State, Elgin, ll &Ol23 • (847) 608-3131 Bureau ofl.md- Peoria •7620N. University St. Peoria, ll6l614 • (309) 693-5462 Collinsville• ;:2009 Mall Street. Collinsville, Jl6223-4 • (618) 346-5120 Desil!Diiffon 

### Name of

### Area. Tazewell Nonattainment Colinty Unc;lassifiable LaSalle Nonattainment County Unciassifiable Nonattainment CookCounty Unclassifi.able Nonattainment WillCounty Unclassifiable Nonattainment Madison Unclassifiable Unc)assifiable illinois

Des Pbines • 9511 W. Harrison St, Des Plaines, ll60016•{847) 294-4000 Peoria• 5415 N. U.niversity SL. Peoria..ll61614 • (309) 693-5463 Champaitn • 2125 5. FirstSt... Champaign, It 61620• (217) 278--5800 Marion• 2309 W. Main .St., Suite 116, Marion, ll62959 • {618)993·7200 PrinLed on Rccyded P.o.prrWe arerecommending that portions ofthe following counties bedesignated as nonattainment for the 2010 primary 1-hour S02NAAQS: Tazewell (Pekin and Cincinnati Townships), La Salle (La Salle Township), Cook (Lemont Township), Will (Lockport andDuPage Townships) and Madison (Chouteau and Wood RiverTownships). As violations ofthe revised S02standard have beenmeasured inthese areas during 2008-2010, designating them as nonattainment is appropriate. Werecommend that theremainder ofIllinois be designated as unclassifiable. 

### Ifthere are any questions, pleasefeel free to contactRob Kaleel (217-524-4343), ormyself. Sincerely,



# ~of~. Laurel 

### L. Kroack Chief, Bureau ofAir

· Attachment

# Technical SupportDocument: Recommended Attainment/NonattainmentDesignations in Illinois for the 2010 Revised Primary 1-Hour S02 

# NationalAmbient Air Quality Standard
AQPSTR 11-02

June 2, 2011

Illinois EnvironmentalProtection Agency Division ofAir Pollution Control

1021 North Grand Avenue East P.O. Box 19276 Springfield, IL 62794-9276 www

### .epa.state.il.us

### Table ofContents TABLES•••••••.•.....•....•.••••.••.....•...........•..•...........................••............................•••.•••••.•.................•.• 3 FIGURES•••••.•..•••••••••••••••••............•.....•.••.........................••............................•••••••.•••................•.•.• 4 INTRODUCTION ••••..••..••..............•...•..•...................................................•....•.•.•••••.................••..• 

### 5 FEDERAL GUIDANCE.•...........••••••••••••......................•••••.......••••••••.•......••.••••••••..•................•••..• 6 FIVE FACTOR ANALYSIS ............................................................................................................................ 7 1. AIR QUALITY DATA ................................................................................................................................. 7 2. EMISSIONS-RELATED DATA.................................................................................................................... 7 3. METEOROLOGY ........................................................................................................................................ 7 4. GEOGRAPHYffOPOGRAPHY .................................................................................................................... 7 5. JURISDICTIONAL BOUNDARIES............................................................................................................ 8 ILLINOIS AIR QUALITY .••.•••••.•••••••...........•.....••.•••••.•..........•••••••.......•••••.••••••..........••.••••••••••... 8 ILLINOIS 5 FACTORANALYSIS ..................•..........................................•..............•...•......... 11 TAZEWELL COUNTY................................................................................................................... 11 LA SALLE COUNTY .... . . . ... . . . . . . . . . . . . . . ... ....... ... . . . . . . . . . . . . . . . . . ... .. ... . . . . . . . . . . ... .. . . . . . . . . . . . . . . ... .. . . . ... . . . . . . . . . . . . . . 1 7 COOKAND WilL COUNTIES ....................................................................................................... 22 MADISON COUNTY .................................................................................................................... 27 RECOMMENDATIONS..••.••.•••••••••••••.••...................••••••••.•......••••••••.......••.••••••••••••................•.• 33

2

### TABLES Table 1 2008-2010 Illinois S02 

### Design Values (ppb)................................................ 9 Table 2 Peoria Area Air Quality Data for 2008-2010 (ppb)....................................... 11 Table 3 Tazewell and Peoria County Reported S02 

### Emissions for 2007-2009 ................ 12 Table 4 LaSalle County Air Quality Datafor 2008-2010 (ppb)........................................... 17 Table 5 LaSalle County Reported S02 

### Emissions for 2007-2009 ............................... 17 Table 6 Cook and Will County Air Quality Datafor 2008-2010 (ppb) ......................... 22 Table 7 Cook and Will County Reported S02 

### Emissions for 2007-2009 ....................... 23 Table 8 Metro-East AreaAir Quality Datafor 2008-2010 (ppb)................................ 28 Table 9 Madison County Reported S02 

### Emissions for 2007-2009 .............................. 28 Table 10 Recommended Attainment/Nonattainment Designations in Illinois for the 2010 Revised Primary 1-Hour S02 

### National Ambient Air Quality Standard................. 3 5 Table 11 S02 

### NAA Five Factor Documentation .................................................... 36

3Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure ll Figure 12 Figure l3 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 

### FIGURES lllinois 1-hour S02Design Values 2008-2010 ...................................... 10 Location ofMajor S02 Emission Sources in Tazewell and Peoria Counties..... 12 Greater PeoriaAirport Climatological WindRose .................................. l3 Pekin Pollution Rose...................................................................... 14 Aerial Photo ofthe Pekin Monitor and nearby Facilities ............................ 15 Proposed S02 Nonattainment Area Boundary for Tazewell County .............. 16 Location ofMajor S02 Emission Sources inLa Salle County..................... 18 Greater Rockford Airport Climatological Wind Rose............................... 19 Oglesby Pollution Rose................................................................. 20 Aerial Photo ofthe Oglesby Monitor and nearby Facility .......................... 20 Proposed S02Nonattainment AreaBoundary for La Salle County ............... 21 Location ofMajor S02 Emission Sources in Cook and Will Counties..... . ....... 23 Chicago-O'Hare Airport Climatological WindRose ................................ 24 LemontPollution Rose .................................................................. 25 Aerial Photo ofthe LemontMonitor and nearby Facilities ........................... 26 Proposed S02Nonattainment Area Boundary for Cook and Will Counties ..... 27 Location ofMajor S02Emission Sources in Madison County ..................... 29 St. Louis-Lambert Field Climatological WindRose ................................ 30 South RoxanaPollution Rose ........................................................... 31 Aerial Photo ofthe South Roxana Monitor and nearby Facility .................... 31 Proposed S02 Nonattainment AreaBoundary for Madison County .............. 32 Proposed S02 Nonattinment Areas..................................................... 34

4

### Introduction On June 2, 2010, the U.S. Environmental Protection Agency (U.S. EPA) revised the primary SulfurDioxide (S02) National Ambient Air Quality Standard (NAAQS) in response to current scientific evidence which links short-term exposure to 

# so2 with adverse health effects in humans. U.S. EPA health studies showthat short-term exposure to S02, ranging from 5- minutes to 24-hours, results in adverse respiratory effects and increased asthma symptoms, particularly in children, the elderly, and asthmatics. According to U.S EPA, there is currently little evidence suggesting a relationship between long-term exposure to S02 and health effects. As a result, U.S. EPA revoked both the previous 24-hour and annual primary S02 standards and established a newprimary !-hour S02 standard at a level of75 parts per billion (ppb) (75 FR 35520; June 22, 2010). As part ofthe 2010 revised primary S02 NAAQS (further referenced as the revised S02**standar~),** U.S. EPA also modified how attainment is determined. The revised S02 standard is attained when the three-year average ofthe annual 99 1 h percentile 1-hour daily maximum concentrations does not exceed 75 ppb (75 FR 35520; June 22, 2010). U.S. EPA will address the secondary S02 standard as part ofa separate review. Section 1 07(d) ofthe Clean Air Act (CAA) governs the process for area designations, and directs states to submittheir S02 designation recommendations to U.S. EPA by June 3, 2011. Following the promulgation ofa new or revised air quality standard, the Clean Air Act (CAA) requires the Governorto recommend initial designations ofthe attainment status for all areas of the State. Areas can be classified as nonattainment (does not meet, orcontributes to anearby areathat does not meet the NAAQS), attainment (meets the NAAQS), or unclassijiable (cannot be classified based on available data). lllinois is, therefore, required to provide recommendations for attainment/nonattainment areaboundaries for the 2010 revised primary 

# so2 standard. The U.S. EPA will act on the State's recommendations by both affirming and promulgatingthe recommended designation boundaries, orby promulgating new designations. U.S. EPA stated in its preambleto the 2010 NAAQS, that in addition to air monitoring data, refined dispersion modeling information may be used as part ofan analytical approach to designations. However, according to the U.S. EPA March 24, 2011 memorandum entitled,AreaDesignations for the 52010RevisedPrimmySulfitrDioxideNationalAmbientAir QualityStandards, the U.S EPA does notbelieve it would be "realistic or appropriate to expect states to complete modeling for all significant sources ofS02 and assess the results in time for the June 2011 designation recommendations". States would instead present modeling to address additional violations in the course ofdeveloping State Implementation Plan (SIP) revisions under Section 11O(a) ofthe Clean AirAct as a, "basis for re-designation ofnonattainment and unclassifiable areas to attainment" (75 FRat 35570). Illinois does not intend to submit dispersion modeling in support ofdesignations at this time. Rather, IEPA will complete dispersion modeling in the course of developing SIP revisions. 

### Federal Guidance The lllinois Environmental Protection Agency"(IEPA) relied on guidance identified in a memorandum issued by U.S. EPA onMarch 24, 2011 which referenced pages in the preamble of the lead NAAQS final rule regarding criteria for developing this recommendation and for establishingthe geographicboundaries ofnonattainmentareas (NAA) for the 2010 revised S02 standard. In this guidance, U.S. EPA recommendedthat states designate areas with air quality data showing violations ofthe S02 NAAQS, and nearby areas that cause or contribute to NAAQS violations, be designated nonattainment. Dueto the localized nature ofS02 impacts, U.S. EPA also recommends that the "county line" associated with the violating monitor(s) serve as the starting point, orpresumptive boundary, for new S02 nonattainment areas. U.S. EPA provides states with the ability to depart from county boundaries based on area-specific analyses. States may request nonattainment areaboundaries that are smallerthan the existing violating county boundaries where counties, orportions ofcounties, do not contribute to nonattainment based on an examination offive factors. States may also request nonattainment areaboundaries that are larger than the current county to include adjacent counties when those counties contain emission sources and otherfactors that may contribute to the nonattainment problem. This report provides the basis for recommendations by the IEPA for attainment/nonattainment designation boundaries for all areas in the State ofIllinois for the revised S02 standard. 6Five Factor Analysis The U.S. EPA recommends that states consider the following five factors in assessing whetherto depart from county boundaries as the designated nonattainment areaboundary: 1. Ail- Quality Data: an evaluation ofthe design value calculations for each monitor in the State. This calculation consists ofthe 3-year average ofthe annual 99th percentile daily maximum 1-hour S02 concentrations collected at each monitor. A detailed discussion of air quality in illinois is provided in the sections below.
2. Emissions-Related Data: an evaluation ofS02 emissions from sources located in and aroundthe violating area which may potentially contribute to observed ormodeled violations ofthe NAAQS. The emissions data used in this analysis are based on actual S02 emissions reported to the IEPA for 2007 through 2009.
3. Meteorology: an evaluation ofweather conditions, including wind speed and direction that affect the plume ofsources contributing to ambient and monitored S02 concentrations. Pollution roses are derived from IEPA sites in the proposed NAA areas, and all sites use either collocated wind measurements, or the nearest IEPA monitoring site with wind direction measurements, along with hourly S02 concentrations. The pollution roses showthe frequency ofwind directions at the monitor when !-hour concentrations ofS02 that exceed the standard are occurring. Detailed meteorology used in !EPA's analysis is discussed in the following sections.
4. Geog.-aphyffopography: Includes an evaluation ofthe physical features ofthe land that mighthave an effect on the airshed and, therefore, on the distribution ofS02 at and near the monitors. Dueto the fact thatnone ofthe recommended S02nonattainment areas in Illinois have any geographical or topographical barriers that significantly limit air 7pollution transport within the airsheds, the geography/topography factor did notplay a significant role in detennining the nonattainment boundaries in Illinois. 5. Jurisdictional Boundaries: Includes an analysis ofareas that provide clearly defined legal boundaries including landmarks or geographic coordinates to carry out air quality planning and enforcement functions for the nonattainment area. The lllinois EPA is responsible for air quality regulatory programs for every county in the state. Jurisdictional boundaries considered in this analysis are consistent with recommended geographic boundaries, or "county line" definitions, outlined in U.S. EPA's guidance documentation. Sub-county boundaries in this study reflect 2009 Political Township boundaries provided by Property Tax Division ofthe Illinois Department ofRevenue. 

### Illinois Air Quality As recommended by U.S. EPA, the first step in identifying areas that are in violation ofthe revised S02 NAAQS is to evaluate the most recent three years ofambient air monitoring data. Table 1 shows the most recent three consecutive years ofquality assured air monitoring data for 2008 through 2010, along with the resulting design values. The design value is defined as the 3-year average ofthe annual 99th percentile daily maximum 1-hour S02 concentrations collected at each monitor (which is generally the fourth highest daily maximum 1-hour concentration, averaged over three consecutive years). The general trend in annual 1-hour 991 h percentile values statewide has been downward. Overall, 16 ofthe 19 Illinois S02 monitoring sites had 991h percentile values in 2010 that were lower than those same values in 2008. Despite the significant improvement in air quality statewide, four monitoring sites currently violate the revised S02 NAAQS. These four monitors are located in Tazewell, LaSalle, Cook, and Madison counties (see Figure 1 ). The remaining fifteen monitoring sites are attaining the revised S02 NAAQS, most by a considerable margin.

8

### Table 1 2008-2010 Illinois 

### S02 

### Design Values (ppb) AQS County Site Annual 991" 

### Percentiles Design Code 2008 2009 2010 

### Value 170310050 Cook Chicago- SE Police 

### 35 19 21 25 170310063 Cook Chicago- CTA 

### 26 21 14 20 170310076 Cook Chicago- Com Ed 

### 26 24 20 23 170311601 Cook Lemont 

### 97 114 90 100 170314002 Cook Cicero 

### 43 29 31 34 170314201 Cook Northbrook 13 

### 17 15 15 170990007 La Salle Oglesby 

### 326 8 14 116 171150013 Macon Decatur 

### 44 36 49 43 171170002 Macoupin Nilwood 

### 20 16 15 17 171191010 Madison South Roxana 

### 152 81 57 97 171193007 Madison Wood River WTP 

### 67 46 54 56 171430024 Peoria Peoria 

### 52 21 43 39 171570001 Randolph Houston 

### 35 26 31 31 171630010 St. Clair East St. Louis 

### 35 30 31 32 171670006 Sangamon Springfield 

### 131 24 31 62 171790004 Tazewell Pekin 

### 243 233 228 235 171850001 Wabash Mount Carmel 

### 90 69 66 75 171851001 Wabash Rural Wabash Co. 

### 57 53 59 56 171970013 Will Joliet 

### 56 32 24 37

9

### Figure 1 

# Illinois 1-hour S02

**~-'----]--'---c__!-l-,,--------J** 

## Design Values 2008-2010

Legend Monitors <= 

### 75 ppb

**~** 

### Monitors > 75 ppb Violating Counties

10

### Illinois 5 Factor Analysis The U.S. EPA recommends that states consider the following five factors in assessing whether to depart from county boundaries as the designated nonattainment area boundary. As previously mentioned, illinois has four counties where monitored violations ofthe revised S02 NAAQS are occurring. The information in the following sections provides boundary recommendations based onthe five factors outlined in U.S. EPA guidance within each violating county or adjacent county. Tazewell County Ail· Quality There are two S02 monitors in the Peoria area. The first monitor is located west ofthe illinois River in Peoria, while the second monitor is located east ofthe lllinois River in Pekin (see Figure 2). Monitoring data for both sites is listed belowin Table 2. The 2008-2010 design value for the Peoria monitor is belowthe revised 1-hourNAAQS, while the design value for the Pekin monitor is well above the revised 1-hourNAAQS. The 2008 through 2010 aunual 991 h percentiles show a small decrease at the Peoria site and consistently high values at the Pekin site. Table 

### 2- Peoria A1·ea Air Quality Data for 

### 2008-2010 (ppb) AQSCode County Site Annual 991 ' Percentiles Design 

### 2008 2009 2010 Value 171430024 Peoria Peoria 52 21 43 39 171790004 Tazewell Pekin 243 233 228 2.35 Emissions Table 3 lists the major S02 emission sources (reported S02 emissions over 100 tons peryear for at least one ofthe years from 2007 through 2009) within bothTazewell and Peoria counties. The locations ofthese sources are shown in Figure 2. From Figure 2, there are two sources in the vicinity ofthe violating monitor in Pekin: Aventine Renewable Energy, and Midwest Generation

- Powerton. Overall, there has been a small decrease in S02 emissions within the Peoria area 11during the period, however Aventine and Midwest Generation-Powerton, have shown either steady or increasing emissions trends during this period. 

### Table 3- Tazewell and Peoria County Reported 

### SOz Emissions fot· 2007-2009 

### Reported S02Emissions County IDNumber Facility Name (Tons perYear) 2007 2008 2009 Tazewell 179060ACR Aventine Renewable Energy Inc 12239.93 11830.31 11819.57 Tazewell 179801AAA Midwest Generation- Powerton 20543.67 22355.08 22125.00

Peoria 143065AJE Archer Daniels Midland Co 3140.00 3049.00 2587.00 Peoria 143805AAG Ameren- Edwards 14535.90 11224.10 117.34.40 Peoria 143808AAA Keystone Steel & Wire Co 109.26 137.53 86.61



### Figure 2- 

### Location ofMajot· S02 

### Emission Sources in Tazewell and Peoria Counties 

### Major 502 Emission Sources in

Tazewell and Peoria Counties

t""''""

FULTON

MASON I '"<n i• '.?"-'

/ t E <

TAZEWELL cf

**"~'** !>""' WOODFORD

Legend Ill 100TPY 802 Facilities l"::. 802 Monitors 

## c::J County Boundaries :

0 2.5 5 10 Miles 

### 12Meteo1·ology The closest National Weather Service (NWS) meteorological monitoring site to the Pekin area is located at the Greater Peoria Airport. TheIEPA considers the meteorological characteristics of the airport site to generally be representative ofthe Tazewell County area, although it is possible that some local-scale differences may occur within the lllinois Rivervalley, where Pekin is located. Figure 3 shows the climatological wind rose, or wind frequency distribution, for the Peoria Airport. The figure shows that southerly winds are most frequent in the Peoria area, with a secondary maximum from the northwest. Figure 3 - Greater Peol"ia Airport Climatological Wind Rose**St;~tionl\'14842-** PEORJA.It3REATER PEORIA ARPT, IL

--**--~··;~,-** 

### -- ' '

-- t '.---

I ·-. 

### : '

- 

### -:-----

' ' '


### ---**~----**

13 <S'>Figure 4 shows the pollution rose for the Pekin monitor, which depicts the wind directions associated with measured S02 concentrations exceeding 75 ppb at this location. Comparing the pollution rose in Figure 4 to Figure 5, which shows the locations ofmajor S02 emission sources with respect to the Pekin monitor, it is apparent that the wind direction during exceedance hours is either from the west orwest-southwest, which aligns the nearby Aventine facility, and, to a lesser extent, Midwest Generation- Powerton with the monitor location.

WNW I. Figm·e 4 - Pekin Pollution Rose

NW

sw··. 

### Wind Rose Pekin Hours> 75 ppb 

### 2008-2010
N NNW NNE

s



### 14 NE
ENE

' ' ESE

Wind data from Peoria, !L Average wind direction = 247 degreesSince thePekin monitoris at a slightly higher elevation than the two facilities to the westsouthwest, IEPA believes that the high concentrations that are occurring at this monitor are primarily due to emissions from these local sources. Jurisdictional Boundaries The Illinois EPA is responsible for air quality regulatory programs for every county in the state. Jurisdictional boundaries considered inthis analysis are consistent with recommended geographic boundaries, or "presumptive boundary" definitions, outlined in U.S. EPA's guidance documentation. Boundaries in this study reflect the 2009 political township boundaries provided by tl1e Property Tax Division ofthe Illinois Department ofRevenue. Based on tl1e geographic location ofPekin and the individual sources, it is expected thatthe coordination ofplanning activities reqnired to address the nonattainment designation can be carried out in a cohesive manner. 15Recommendation Based on the factors discussed above, illinois recommends that Pekin and Cincinnati Townships in Tazewell County be designated as nonattainmentfor the 2010 1-hour S02 NAAQS (see Figure 6). These two townships contain both the violating monitor and the two most culpable emission sources. Figm·e 6- Proposed S02 NonattainmentArea Boundary for Tazewell County 

### Proposed 502 Nonattainment Area in Tazewell County

"''"'"'0 g = ''"="'"" t


# l

l 

### '

16 " £ l B**P''~"'""** (¢_..,.,""""'""

TAZEWELL

COUNTY**s,.,.Rq,.,.~- ~**  ,; 

### i
Legend 

### CJProposed NM

/::. S02 Monitors IIi S02 FaC1!it1aS 

## o**L,,.,,,,--,2:-:.,~--.,,r's** Miles 

### .J '"'

### La Salle County Air Quality There is one S02 monitor in La Salle County located in Oglesby. Monitoring data for this site is listed belowin Table 4. The 2008-2010 design value for the Oglesby monitor currently exceeds the revised !-hourNAAQS. However, the 2008 through 2010 annual 99th percentiles show a large decline in S02values measured at the Oglesby site related to the suspension ofoperations at the Lone Star Industries cement plant in 2008. The 99th percentiles for both 2009 and 2010 were the lowestvalues in the state and the Oglesby monitor is expected to attain the revised !- hour NAAQS by the end of2011. 

### Table4- La Salle County Air Quality Datafot· 

### 2008-2010 (ppb) AQSCode County Site Annual 99th Percentiles Design 

### 2008 

### I 2009 

### I 2010 Value 170990007 La Salle Oglesby 326 

## I 8 

## I 14 116 

### Emissions Table 

### 5 lists the major S02 emission sources (reported S02 emissions over 

### I00 tons per year for at least one ofthe years from 2007 through 2009) in LaSalle County. The locations ofthese sources are shown in Figure 7. From Figure 7, there is only one source in the vicinity ofthe violating monitor in Oglesby: Lone Star Industries. This facility has been closed since 2008, which is reflected in the large decrease in S02 emissions shown in Table 5. There has also been a significant reduction in S02 emissions at the illinois Cement Company plant in La Salle, although this facility remains operational. 

### Table 5- La Salle County Reported S02 Emissions fot· 

### 2007-2009 Reported S02Emissions County IDNumber Facility Name (Tons perYear) 

### 2007 2008 2009 La Salle 099030AAZ Illinois Cement Co 167.8 160.34 90.17 La Salle 099490AAD Owens-Brockway Glass Container Inc 228.24 221.72 208.69 La Salle 099816AAF Lone Star Industries Inc 2937.16 2241.18 0.00 La Salle 099825AAG Pilkington North America Inc 293.66 255.1 308.22 17

### Figure 7- Location ofMajor S02 

### Emission Sources in La Salle County 

### Major S02 Emission Sources in La Salle County



## "

\i;v;;"',_ C·it /"" 

### MARSHALL

Meteot·ology fl:ttid:t-:J& _:'\W;LMt LIVINGSTON L\. S02 Monitors :r, (:_J'!Y;V-_; ·::'

1!1 100TPY S02 Facilities 

## C=:J County Boundaries

3.5 7 14 M11es

The Oglesby monitor is in north-centrallllinois, roughly the same distance from NWS stations at the Rockford Airport and at the PeoriaAirport. Figure 8 shows the climatological wind rose for the Rockford airport. TheRockford wind rose looks very similar to the Peoria wind rose, presented previously in Figure 3. There is a pronounced maximum frequency ofsoutherly winds at Rockford, as at Peoria, with a secondary maximum from the northwest. The IEPA considers these NWS stations to generally be representative ofconditions occurring in La Salle County, although it is recognized that the Vermillion Rivervalley, where the Lone Starfacility is located, may cause localized meteorological influences. 18Figm·e 8- G•·eate•· Rockf01·d Airport Climatological Wind Rose
Station #94S22- ROCKFORD.'GREATER ROCKFORD ARP, ll

__

### .----

**:;,;,;;~---­** ' ' ' '

---

**-~-** --- ' ' 

### : ' '


### --- -:- 

### ---

Figure 9 shows the pollution rose for the Oglesby monitor, while Figure I0 is an aerial photo that shows the relationship ofthe one large source to the monitor. The pollution rose shows that the wind direction during exceedance hours is primarily from the southwest, which corresponds well with the location ofLone Star Industries, which is locatedto the south and southwest ofthe monitor. Based on this analysis, the IEPA concludes that exceedances ofthe revised !-hour S02 NAAQS at Oglesby are due primarily to emissions from the Lone Star facility.

19

### Figure 9- 

### Oglesby Pollution Rose

IIW
WtiW.

sw Wind Rose Oglesby Hours> 75 ppb 2008
NNW_

ssw \iO,O-.;--·-
-- ?0.0% -.;o,ro>----- .>o,o%-- -· < _



## '" ENE

Wlnd data trorn Ogie5by SE Averuge wi"d d'rection**~** 227**<kuree~** 

### Figure 10 -Aerial photo ofthe Oglesby Monitor and nearby Facility



### 20Judsdictional Boundaries TI1e Illinois EPA is responsible for airquality regulatory programs for every county inthe state. Jurisdictional boundaries considered in this analysis are consistent with recommended geographic boundaries, or "presumptive boundary" definitions, outlined in U.S. EPA's guidance documentation. Boundaries 

### in this study reflect the 2009 political township boundaries provided by the Property Tax Division ofthe Illinois Department ofRevenue. Based on the geographic location ofOglesby and the individual sources, it is expected thatthe coordination ofplanning activities required to address the nonattainment designation can be carried out in a cohesive mam1er. Recommendation Basedon the factors discussed above, illinois recommends that La SalleTownship in La Salle County be designated as nonattainment for the 20I0 1-hour S02 NAAQS (see Figure 11). This township contains both the violating monitor and the most culpable source ofS02 emissions. Figure 11- Proposed S02 Nonattainment Area Boundary f01· La Salle County Proposed 502 Nonattainment Area for La Salle County

"""'""**-~** ,,,..,.,, .,J

21 Legend 

### CJPro::>O>ed NAA

/:::. S02Monl!ots lliil S02**~l!l::ili~.as 2~ti!<S:o**  -•'"Cookand Will Counties Ail· Quality There are seven S02 monitors located in Cook and Will Counties. Monitoring data for these sites are listed belowin Table 6. The 2008-2010 design values for all ofthe sites are well below the revised 1-hour NAAQS, except for the monitor at Lemont. As can been in Figure 12, the distribution ofdesign values across northeastern illinois indicates that the Lemont monitor represents a "hot spot" due to impacts from local emission sources. Table 6- Cookand Will County Ail· Quality Data for 

### 2008-2010 (ppb) AQSCode County Site Annual 99 1" Percentiles Design 

### 2008 2009 2010 Value 170310050 Cook Chicago- SE Police 35 19 21 25 170310063 Cook Chicago- CTA 26 21 14 20 170310076 Cook Chicago- Com Ed 26 24 20 23 170311601 Cook Lemont 97 114 90 100 170314002 Cook Cicero 43 29 31 34 170314201 Cook Northbrook 13 17 15 15 171970013 Will Joliet 56 32 24 37 Emissions Table 7liststhe major S02 emission sources (reported S02 emissions over 100 tons per year for at least one ofthe years from 2007 through 2009) within Cook and Will counties. The locations ofthese sources are shown in Figure 12. FromFigure 12, there are three sources in the vicinity ofthe violating monitor in Lemont: OxbowMidwest Calcining, CITGO Petroleum, and Midwest Generation- Will County. It should be noted that all threenearby sources are located in Will County, although the Lemont monitor is located in Cook County. Overall, S02 emissions in Cook and Will counties have dropped by almost 50% since 2007, with the most significant reductions occurring at the two oil refineries (CITGO and Exxon Mobil).

22Table 7- Cook and Will County Reported S02Emissions for 2007-2009 Repot1ed 

### S02 Emissions County IDNumber Facility Name (Tons per Year) 2007 2008 2009 Cook 031012ABI Corn Products International Inc 1942.00 2203.00 991.00 Cook 031069AAI Saint-Gobain Containers Inc 354.05 344.84 300.30 Cook 031123ABP Congress Development Co 57.43 81.33 204.00 Cook 031300AAJ Koppers Inc 846.80 823.17 705.38 Cook 031600ADY Carmeuse Lime Inc 359.57 321.46 0.00 Cook 031600AIN Midwest Generation -Crawford 8881.90 6626.90 7107.50 Cook 031600AMI Midwest Generation- Fisk 4954.51 4485.561 4217.56 Cook 031600CTF Saints Mary and Elizabeth Med. Center 0.07 0.10 125.01 Will 197090AAI CITGO Petroleum Corp 14170.75 6135.86 336.62 Will 197800AAA Exxon Mobil Oil Corp 22095.05 16404.03 1914.79 Will 197803AAK Oxbow Midwest Calcining LLC 7153.21 6204.85 4990.62 Will 197809AAO Midwest Generation- Joliet 20265.72 18281.72 17996.87 Will 197810AAK Midwest Generation- Will County 17310.81 16496.78 12602.53 Figure 12- Location ofMajor S02 Emission Sources in Cookand Will Counties

23Meteo.-ology The Lemont monitor is located in Cook County, so the nearest NWS site is at Chicago's O'Hare Airport. Since the Lemont site is a similar distance from LakeMichigan as O'Hare airport, the effect ofLake Michigan on local wind directions shouldbe comparable. Figure 13 shows the climatological wind rose for O'Hare Airport. Unlike the Peoria and Rockford wind roses shown previously, a higher frequency ofwind directions occur at 0 'Hare from southerly through westerly, with a secondary maximum from the northeast. Figure 13- Chicago-O'HareAirport Climatological Wind Rose

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24Figure 14 shows the pollution rose for the Lemont monitor, whileFigure 15 is an aerial photo that shows the spatial relationship ofmajor emission sources to the monitor. Thepollution rose shows thatthe wind direction during exceedance hours is mostly from the west, which indicates likely contributions from OxbowMidwest Calcining, and, to a lesser extent, CITGO Petroleum. With the close proximity ofmajorsources upwind from the monitor on high concentration days, IEPAbelieves thatnonattainment atthe Lemont monitor is primarily due to these local sources. Figure 14 - Lemont Pollution Rose

NW

WNW.

wsw>'sw' Wind Rose lemont Hours 

### >75 ppb 

### 2008-2010
N NNW

**0.0%~---** .., "'-.,NNE ),i.O!O%·

**~- ~---**  _ \ 1.0.6%---...._· _____- 39,0%- ,___7'-- zp._q%

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ENE

Wind data from lisle, IL SE Average wind direction = 268 degreesFigure 15 - Aeiial photo ofthe Lemont monitor and nearby Facilities

Jurisdictional Boundaries TI1e Illinois EPA is responsible for airquality regulatoryprograms for every county in the state. Jurisdictional boundaries considered in this analysis are consistentwith recommended geographic boundaries, or "presumptive boundary" definitions, outlined in U.S. EPA's guidance documentation. Boundaries in this study reflect the 2009 political township boundaries provided by the Property Tax Division ofthe Illinois Department ofRevenue. Based on the geographic location ofLemont andthe individual sources, it is expected thatthe coordination ofplam1ing activities required to address the nonattaiim1ent designation can be carried out in a cohesive manner. Recommendation Based on the factors discussed above, TI!inois recommends that LemontTownship in Cook County and DuPage and LockportTownships in Will County be designated as nonattainment for the 2010 !-hour S02 NAAQS (see Figure 16). Thesethree townships contain both the violating 

### 26monitor and the most culpable sources ofS02 emissions impactingthe Lemont monitor. Figure 16- Proposed S02 Nonattainment Area Boundary for Cook and Will Counties

Madison County Ail· Quality There arethree 

### SOz monitors in the Metro-East area. Two ofthe monitors are located in western Madison County, while the third monitor is located in East St. Louis in St. Clair County. Monitoring data for all three sites is listed in Table 8. The 2008-2010 design values for the Wood River and East St. Louis monitors are well belowthe revised 1-hour NAAQS, while the design value for the South Roxanamonitor exceeds the revised 1-hour NAAQS. The 2008 through 2010 annual 991 h percentiles decreased at all three sites, with the most significant improvement occurring at the South Roxana monitor. 27Table 8- Mett·o-East AreaAir Quality Data fot· 2008-2010 (ppb) AQS Code Coul!tY Site Annual99'" Percentiles Design 2008 2009 2010 Value 171191010 Madison South Roxana 152 81 57 97 171193007 Madison Wood River WTP 67 46 54 56 171630010 St. Clair East St. Louis 35 30 31 32 Emissions Table 9lists the major S02 emission sources (reported S02 emissions over 100 tons per year for at least one ofthe years from 2007 through 2009) in Madison County. The locations ofthese sources are shown in Figure 17. FromFigure 17, there is only one source in proximity to the violating monitor in South Roxana: ConocoPhillips. S02 emissions in Madison County have decreased significantly during the 2007-2009 period. The largest reductions occurred at the ConocoPhillips oil refinery, which is located near the South Roxana monitor, and US Steel's Granite City Works. Table 9- Madison County Reported 

### 802 Emissions for 2007-2009 Reported S02 Emissions County IDNumber Facility Name (Tons per Year) 2007 2008 2009 Madison 119010AAE Alton Steel Inc 121.43 142.88 63.25 Madison 119020AAE Dynegy Midwest Gen.- Wood River 6462.30 6873.20 9089.10 Madison 119040ATN Gateway Energy & Coke Co LLC 0.00 0.00 580.34 Madison 119090AAA ConocoPhillips Co 13629.96 12273.72 5761.00 Madison 119813AAI US Steel- Granite City 6187.15 5612.67 1428.31

28Figure 17- Location ofMajor S02 Emission Sources in Madison County MACOUPIN MONTGOMERY Major S02 Emission Sources in Madison County

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ST. CLAIR 0 2 Meteorology 4 BOND

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The nearestNWS site to Madison County is Lambert Field in St. Louis. Figure 18 shows the climatological wind rose for Lambert Field. Unlike the wind roses previously shown, the most frequent wind directions are from the south through southeast, with a strong secondary maximum from the northwest. The IEPA considers the meteorological conditions atLambertField to generally be representative ofconditions occurring in Madison County, although it is recognized that the South Roxana monitor is located on the flood plain ofthe Mississippi River and may experience some localized differences.


### 29Figm·e 18 - St. Louis-Lambert Field Climatological Wind Rose
Station #13994. ST LOU!S'LAMBERT !tiTlARPT, MO

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Figure 19 shows the pollution rose for the South Roxana monitor, while Figure 20 is an aerial photo that shows the relationship ofthe one large source to the monitor. The pollution rose shows thatthe wind direction during exceedance hours is primarilyfrom the northwest which aligns the nearby ConocoPhiliips refinery with the monitor location. With the proximity ofthis major nearby source to the monitor, IEPA concludes that emissions from this facility are primarily responsible for exceedances ofthe revised 1-hour S02 NAAQS at South Roxana.

30

### Figm·e 19
- South Roxana Pollution Rose

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### Figm·e 20 -Aerial photo ofthe South RoxanaMonitor and nearby Facility

31Jurisdictional Boundaries l11e Illinois EPA is responsible for air quality regulatory programs for every county in the state. Jurisdictional boundaries considered in this analysis are consistent with recommended geographic boundaries, or "presumptive boundary" definitions, outlined in U.S. EPA's guidance documentation. Boundaries in this study reflect the 2009 political township boundaries provided bythe Property Tax Division ofthe Illinois Department ofRevenue. Based on the geographic location ofRoxana and the individual sources, it is expected thatthe coordination ofplanning activities required to address the nonattaimnent designation can be carried out in a cohesive manner. Recommendation Based onthe factors discussed above, lllinois recommends that Chouteau and Wood River Townships in Madison County be designated as nonattainment forthe 2010 !-hour S02 NAAQS (see Figure 21). These two townships contain both the violating monitor and the most culpable source ofS02 emissions impactingthe South Roxanamonitor. Figure 

### 21- Proposed S02 NonattainmentAt·ea Boundary for Madison County iProposed 502 Nonattainment · Area for Madison County

32 t"""' !!'=" 

### ' 51t<lci>

### Recommendations IEPA's recommendations for attainment/nonattainment boundary designations in lllinois for the 20I0 revised !-hour S02 national ambient air quality standard are contained in Table I0. Current air quality data collected by the IEPA indicates that the 20I0 revised primary S02 NAAQS is not being met in the areas listed in Table I0, and that they should be designated as nonattainment areas. The locations ofiEPA's recommended S02nonattainment areas for the State oflllinois are shown in Figure 22. The Clean Air Act does not specify the geographic boundaries, size, or the extent to which source contributions would require that an area be designated as nonattainment for the 2010 revised primary S02 standard, nor has U.S. EPA promulgated rules prescribing such. IEPA's recommendations are consistent with the guidance memorandum provided by U.S. EPA and are based on an evaluation ofcurrent air quality, the location and magnitude ofS02emission sources, and other factors. The IEPA recognizes that each ofthe factors considered in this evaluation, when evaluated individually, are not necessarily conclusive. Rather, IEPA's recommendations are based on consideration ofall ofthe factors taken together. Itis expected that the coordination ofplanning activities required to address the nonattainment designations can be carried out in a cohesive manner. The data sources utilized in the preparation ofthis report are summarized in Table II.

33

### Figure 22 

# Proposed 502 Nonattainment Areas

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## Legend NonattainmentAreas 

# D Unclassifiable Areas

34

### Table 10 Recommended Attainment/NonattainmentDesignations in Illinoisfor the 2010 Revised Primary 1-hour 

## S02 National AmbientAir Quality Standard County (Partial) Desij!;nation Name ofArea Tazewell County: 

## • Pekin and Cincinnati Townships Nonattainment Tazewell County 

## • Remainder ofTazewell County Unclassifiable La Salle County: 

# • La Salle Township Nonattainment La Salle County 

## • Remainder ofLa Salle County Unclassifiable Cook County: 

# • Lemont Township Nonattainment Cook County 

## • Remainder ofCook County Unclassifiable Will County: 

# • Lockport and DuPage Townships Nonattainment Will County 

# • Remainder ofWill County Unclassifiable Madison County: 

# • Chouteau and Wood RiverTownships Nonattainment Madison County 

## • Remainder ofMadison County Unclassifiable All Other Counties Unclassifiable Illinois

35

### Table 11 802 

### NAA Five Factor Documentation 1.•·· 

## '> .. .Factor. • ·.·

# ... · 

### 1 

### >·... •>·.·· 

### Data

### Analysis ..,· ·.· I 

### Data 

### Sout"Ce .. ·•.·. ·.

**··nateofStu~** 1. Air Quality S0

## 2 2008-2010 Design Values !EPABOA Database, at individual monitors Air Monitoring 2008-2010 (statewide) Section 2. Emissions Emission inventory information !EPA 2007-2009 for 

## so2 Reported Emissions, 2009
3. Geography/Topography Statewide elevations Google Maps Data 2008
illinois Department of 4. Jurisdictional Boundaries illinois Department of Revenue, Property Revenue, Political Townships Tax Division, 2009 Springfield, illinois 5. Meteorology Weather patterns- Wind Roses National Weather and Pollution Roses. Service, Illinois State October 7, 2004 1961- 1990 Climatologist Office

36