**/'.~'t.\..'P'Y" .** **'** ' f '**~~f~,./** f j
. ' • • ST £ : 01' MI S S 6) U,R Jeremiah W. Oay) NIXo n, Governo r. Sara Parker Pauley, DIrecto r

# q~Pi\:R**~j: T**  OF NATU RAL RESO U RCES wW\v
. dnr.mo.gov -------- -**~:** 

### OCT 2 8 2 01 1 Mr. Karl Brooks Regional Administrator U.S. EPA, Region VII 901 North Fifth Street Kansas City, KS 66101 Dear Mr. Brooks: The Missouri Air Conservation Commission has recently revised or promulgated the following air quality plan contained in the Missouri State Implementation Plan (SIP). The following is enclosed for your review and approval into the SIP: Redesignation Demonstration and Maintenance Plan for the Missouri Portion of the St. Louis Nonattainment Area for the 1997 8-Hour Ground-Level Ozone (0 3) National Ambient Air Quality Standard (NAAQS). This revision to the SIP provides the documentation to support Missouri's request that EPA redesignate the Missouri portion of St. Louis nonattainment area for the 1997 8-hour groundlevel ozone NAAQS to attainment. The plan demonstrates that the area has met all of the requirements for redesignation. This plan revision also includes the maintenance plan for the area, which addresses how the area will continue to comply with this NAAQS. The maintenance plan establishes a transportation conformity emissions budget for on-road mobile emissions of nitrogen oxides (NO x) and volatile organic compounds (VOC). Also included in this plan revision is a comprehensive 2008 base year emissions inventory (Appendix E) , which was placed on the Web for a 30-day public comment period beginning August 8, 2011. The commission adopted the enclosed plan action on October 27,2011, after considering comments received at public hearing
. The commission has full legal authority to develop the Missouri SIP pursuant to Section 643.050 of the Missouri Air Conservation Law. The state followed all applicable administrative procedures in proposing and adopting the plan action. Enclosed are the required SIP submittal elements for determination ofplan completeness per 40 CFR Part 51, Appendix V. In order to comply with Attachment A of the "Regional Consistency for the Administrative Requirements of State Implementation Plan Submittals and the Use of 'Letter Notices'" memo dated April 6 , 2011 , a searchable pdf version ofthis document will be emailed to the EPA Regional Office and will be posted on our website at http ://dnr
.mo.go v /env/apcp/stateplan s .htm
. 

# o !{'-'i:) l' ll-d PnPfrMr. Karl Brooks Page Two Also, due to their size, the appendices ofthis document have been submitted via disk(s) that have been included with the paper copy ofthe main document ofthis SIP revision. Thank you for your attention to this matter. If you have any questions regarding this submittal, please contact Ms. Wendy Vit with the Missouri Department of Natural Resources' Air Pollution Control Program at P.O. Box 176, Jefferson City, MO 65102 or by telephone at (573) 751-4817. Sincerely, AIR POLLUTION CONTROL PROGRAM

# K~or;;~~ Director KLM:mlc Enclosures: Copy ofplan (appendices on disk(s)) Copy of commission signature page certifying Missouri Air Conservation Commission adoption Copy ofpublic hearing newspaper notice Copy ofpublic hearing transcript introductory statement Copy ofpublic comments and responses Copy of the Webpage posting the Comprehensive 2008 Base Year Inventory for public notice
c: Missouri Air Conservation Commission

### Pursuant to 643.055 RSMo, the Missouri Air Conservation Commission has determined that this action is needed to have a U.S. Environmental Protection Agency approved State Implementation Plan. The Redesignation Demonstration and Maintenance Plan for the Missouri Portion ofthe St. Louis Nonattainment Area for the 1997 8-Hour Ground-Level Ozone National Ambient Air Quality Standard is hereby adopted by the Missouri Air Conservation Commission this 27th day of October, 2011. Commissioners participating by phone are included on the attached signature sheet.

__________________________________,Chairman

, Vice Chairman

# ~**.--; ~7~\\;OJ** **,.........., f---...L** **P- ..:.....!:** **== =--** **--,** Member 

# ;:/)
. . /l

# ~~ _

__

# ~-----------,Member __ ______ __

__________________________________,Member

__________________________________,Merrlber

__________________________________,Member Page 1 of2

### The Redesignation ofthe St. Standard is hereby adopted by the Missouri Air Conservation "-'V'HUU,I,.:l''''".,JlJl 

### day Environmental Protection Missouri Air Conservation Commission has

Maintenance Plan for Missouri Portion 1997 8-Hour Ground-Level Ozone October, 201 L The following Commissioner(s) participated by phone:

_________________________________,Chairman

Vice Chairman 

# ---------------------------------,

_________________________________,Member

_________________________________,Member

_________________________________,Member Page 2 of2

# ------------------ 

# PUBL'ISH R'S AFFID VIT

OF MISSOURI,) )8S. 

### COUNTY OF COLE) Mike Vivion being duly sworn, according to law, he is Vice President a

. that Missouri Newspapers, Inc., Publisher of the News Tribune, published in the County of Cole, State published continuously more than years; said paper in compliance with the provisions of Section 493.050 R.S. of Mo. For 2000 as amended for

___ 1_t_im_e
___ 

### as follows: 1 st 

### August 11 

### No. day 2nd 

### insertion, No. day of 3rd 

### No. day of 4th

. 

### No. day of 5th 

### No. $237.50 

### Fee: 25th 

### Subscribed and sworn to before me this dayof

_______ 

### A_u_gu_s_t

________ 11


### Notary Public, 2013 

### My as NotaryM I S SO U RI AI R**CO I~** **ER ATI** **ON** CO M MISS I ON WILL HOLD PUB LIC HEAR I N G JEFFERSO N C ITY, MO -- Th e M i sso uri Ai r Cons erv ati o n Co mmi ss ion will holq a publi c h eari ng on th e New Sourc e Pe rform an ce Regulation s, M ax imum Achieva bl e Control Technolo g y Regul ation s, Em iss i o n Standard s for H azardous Air Pollutants , and the Maintenan ce Plan for the SI. l o ui s Ozo ne Non attainm e nt Area on Th u rsd ay, Septemb e r 29 , 2011
. The Pu bli c Hearing w i ll begin at 9 a . m . at the Holid ay tnn Southeast, Grand Ballroom A, B , and C , 9103 Eas t 39th Street , Kan s as City, Mi ss ouri
. Th e commi ss ion wi ll h e a r te stimony re l at ed to the ! followin g it em(s). I · 10 CSR 10- 6070 (am e ndment) New So urce Perform ance Re g ul a­ tions Th is propo se d amendment will adopt n e w emi ss ion standards, update s, and clarific a tions to existing fed e ral rule 40 C FR 60 th at were promulg ated during cale ndar yea r 2010
. This rul e a s a whole est abli sh e s acceptable d es ign and perform ance ! criteria for s pecified n ew or modified

emission sources. 10 CSR 10-6.075 (amendm e nt) M ax imum A chi evable Control Technology Regulations This propo s ed amendment will adopt new emi ss ion standards, updates , I and clarificati o ns to exi sting federal ; rule 40 CFR 63 that were promulgatI ed during cal endar year 2010
. This

rule as a wh o l e establishe s emiss ion

. control t echnology, performance c riteria, and work practi ces to achieve emi ss ion standard s for sources th at emit , or have the potential to emit , hazardou s a ir pollutants, 10 CSR 10-6.080 (am e ndm e nt) Emi ss ion Stand ards for Haz ard ­ ous Air Pollutants Thi s proposed amendment will adopt

, new emis s ion standards, updates,

and clarification s to existing federal rule 40 CFR 61 that were promUlgated during ca lendar year 2010
. This rule as a whol e establishes emi ss ion standards and performanc e criteria for new or modified sources emitting hazardous air pollutant s. ' R edesignatio n Demonstration ' and Maintenance Plan for the M isso uri Portion of the SI. Lo u i s Non attainm e nt Area for th e 1997 8-H ou r Ground -level Ozone N ati ona l Ambi e nt Air Qu ality Sta ndard (NAAQS)
. On Apr il 30 , 2004 , the U , S, Enviror]­ mental Prot ection Agen cy (EPA) I ' desi gnated ·t he Missou ri coun ties pf ' 

### I Franklin , J efferson , SI. Ch arl es, and I SI. Lo uis alo ng with the City of SI.

Lou is as a n on all ai nmen t area for t he ' 1997 8-Hour Ozo ne NAAQS .' Monitoring data sh ows th at violation
. s of the st andard are no longer occurring wit hin t he SI. Louis reg ion , Monitors loc ate d in the SI. Louis : metro p o litan area have recorded " j three y ea rs of co mpl ete, quaf.i!Y
.'
.

assured ambi en t air**qual ty** **~** monitoring d ata f or 2008-201j),'
. demonstrati ng atta i n ment with ttie
.. ozone NAAQS , Now th at the area has' attai n ed t he sta n dard, a**redesign~- J** 

. t i on requ est**a~d in** **te na~ce** **P. ~2** **,** for th e SI. loUiS a rea I S being**ub~ :**  mill ed to EPA to red esign ate the ;. affected area to att ai nment for this , NAAQS
. Doc uments for th e above item(s) will 

# I b e avail ab l e fo r review at th e Missou ri De pa rt m ent of Natu ral Re- I so u rces , Ai r Po llution Con t rol Program , 1659 El m Stre et , J effers on C ity , (573) 751 -4817 and in the Public N oti ces se cti on of the program web site www . d nr. mo . gov/env/a pcp/in · d ex . html. Thi s information will be avail abl e at l eas t 30 days prior to the : publi c h earing d ate
. 

## I Perso n s w i th di s abilities re quiring

. s pec ial s ervices or accommod ations

to att e nd th e meeting can make arrangement s by calling the Department directly at (573) 526 -4679, the D epartm e nt' s toll free number at (800) 334-694 6, or by writing two we eks in advance of the me eting to : Mi ssouri Dep artment of Natu ral Re - ; sources, Air Con servation Commission Secretary , P.O. Box 176, Jeffer­ son City, MO 65102
. Hearing imp aired person s may contact the progra m through Relay Missouri,**~** (800) 735-2966.
. The c ommi ss ion hold s public hearing s und e r the provi s ions of chapt e r 64 3, RSMo
. Citizens wishing to sp ea k at th e public h earing s hould n otify the s ec retary to th e Mi ssouri Air Con se rvation Commi ssi o n, Missouri D ep a rtment of N atura l Re ­ sources, Air Pollution Control pio gram, P.O
. Box 176 , Jeffe rs o n City, Mis souri 6510 2- 0176, .or telephone (573) 52 6-4 679. The Dep a rtment requests perso ns intending to give ve rbal pre sentations also provide '8, written copy of their testimony to the
. comm iss ion s ecretary at ·th e time of the public hearing : The Department
. al so will ac ce pt written or email comments fo r th e record until 5 p
. m . on ' Octob e r 6 , 2011 ; please se nd written ' comm e nt s to Chief, Air Quality Planning Section , Air PollutiQ
.h , Control Program, P.O
. Box 176 ; ' Jeffers on City, MO 65102 -0176 : , Email co mm e nt s regarding rule ac-. tion s s h a ll be sent 

### to apcprule s pn @ dnr.mo.gov and emaH comm e nts reg a rding plan actio' iis shall
. b e s e nt to'

, apcp s ip @ dnr
. mo .gov. All written Sind
. '

ema i l comm e nt s and public hearing te stimony will b e equally con s idered.
.. 

# I Public hearing items may be adopted
_

by th e Mi sso uri Air Con s ervation : Commi ss ion as provided for unc;fe r authority of 643,050 , RSMo , For**mor~ "**  information or a complete**meetirlg :~**  agenda , incfuding items being**pre ,~**  sented for adoption , contact the Mis ; : souri Department of Natural Re- ' sources' Air Pollution Control " Program at (573) 751-4817
. . ' ::" N
.T
. August 24 , 2011
. ";';': ofiPUBLIC HEARING 912912011 Page 1 STATE OF SSOURI 2 DEPARTMENT OF NATURAL RESOURCES 3 MISSOURI AIR CONS COMMISSION 4 5 6 PUBLIC HEARING 7 8 9, 20



### o HoI Inn Southeast 12 Grand Ballroom, A, B & C

3 9103 East 39th Street

I 14 Kansas Ci MO 64133

17 Mr. Mark S. Garnett, Chairman 18 Mr. Gary 19 Mr. Jack Baker 20 Mr. Ron Boyer 21 COMJvlISSIONERS

Ms. Moore, tor Mr. David S. Imore, Assistant 25 STAFF
MIDWEST LITIGA TION SERVICES www.midwestlitigation.com Pl1olle: 1.800.280.3376 Fax: 314.644.13345

10

15

20

25 PUBLIC HEARING 9129/2011 Page 3

1 ITEM C

- PUBLIC HEARING 2 (Starting time of the Hearing: 9:00 3 a.m.) 4 CHAIRMAN GARNETT: The Hearing will come to order. Let the record show the following 6 Commissioners are present: Mark Garnett, Jack 7 Baker, Gary Pend e rgrass and Ron Boyer. 8 The Air Conservation Commission for the 9 State of Missouri has called this Public Hearing pursuant to Section 643.070, Revised Statutes of 11 Missouri, EPA Promulgated Rule 40 CFR 51.102 for 1 2 the purpose of hearing testimony relating to 10 CSR 13 10-6.070 New Source Performance Regulations, 10 CSR 14 10- 6 .075 Maximum Achievable Control Technology Regulations, 10 CSR 10-6.080 Emission Standards for 16 Hazardous Air Pollutants. 17 Missour i State Imp leme nt ati on Plan

- 18 Rede s ignation D emonst ration and Mai nt en a n ce Plan ' 19 fo r the M issouri Por tio n o f th e St. Louis Nonat t ai nment A rea for th e 1997 8-H our Gro un d-Leve l 21 Ozone National Ambie nt Air quality St an dard. 22 The Hearing record will close at 5 p.m., 23 Octobe r 6th, 2011. Anyone who has not been 24 available to appear but they wish to be heard should indi cate that yo u wis h to speak on the signMIDWEST LITIGATION SERVICES www.midwestJitigation.com Phone: 1.800.280.3376 Fax: 314.644.13345

10

15

20

25 PUBLIC HEARING 9/2912011

1 2 3 4

6 7 8 9

11 12 13 14

16 17 18 19

21 22 23 24 smaller sources that w e would need to inspect, so it would be inspectors in the Regional Office, some staff in the Central Office to do

- to file some notifications. We do some of that already, but the bulk of the work would be the inspections of those
sources. The gas stations, for example, I think there are several thousand, but then we would have to add the out of state
- outside of St. Louis that
we don't already inspect. COMMISSIONER PENDERGRASS: Alright, thanks. CHAIRMAN GARNETT: Mark Leath? (WHEREIN, the Witness Mark Leath was duly sworn by the Court Reporter.) MR
. MARK LEA TH: Goo d morning Ch a irman , Member s of the Commi ssion, my name is Ma rk Lea th. I am employed wi th the Air Po l lution Control Program a s an Environme n t a l En gineer
. I work at 1659 East Elm Street , Je ffe rso n City, Mis souri
. I am h e r e today to p re sent t estimony o n
a Redesignation Demonst ration and Ma intenance Pl an f or th e Misso uri Po r tion of th e S t. Loui s Nonatt a inment Area fo r t he 1997 Ground- Level Ozon e Nati o na l Ambi e n t Air Qua l ity S tandard , or NAAQS
. Page 10

MIDWEST LITIGATION SERVICES www.midwestlitigation.com Phone: 1.800.280.3376 Fax: 314.644.1334COMMENTS AND RESPONSES AND RECOMMENDATION FOR ADOPTION PROPOSED REVISION TO THE MISSOURI STATE IMPLEMENTATION PLAN­ REDESGINATION DEMONSTRATION AND MAINTENANCE PLAN FOR THE MISSOURI PORTION OF THE LOUIS NONATTAINMENT AREA FOR THE 1997 OZONE (03 ) NATIONAL AMBIENT AIR QUALITY STANDARD
On U,",,.ILvU Missouri Air Conservation Commission to the Missouri Redesignation Demonstration and Maintenance Plan Missouri Nonattainment for the 1997 8-Hour Ground-Level Ozone National Standard (NAAQS). The following is a implementation plim are identified in the reS 1 ponises Missouri Department ofNatural Resources' Air Pollution Control Program the commission adopt the plan action as amended. If the commission plan be intention to submit to Protection Agency Missouri Implementation Plan. SUMMARY OF COMMENTS: The Department received six (6) comments, all from the U.S. Environmental Protection (EPA). COMMENT # 1: EPA commented that portion document compliance with requirements for Reasonably Available Control Technology include additional language regards to the NO x waiver for the 1997 8-hour ozone standard that was finalized by for the Louis area. commented that it should be noted that no comments were we the In document. They also provided suggested language could be RESPONSE AND EXPLANATION OF CHANGE: The department appreciates the cooperation in commenting on this redesignation request and maintenance plan. portion of that the fulfillment the requirements has been to**UF;~';,,";:)l,,"U** language in regards to NOx COMMENT #2: commented that on 29 of the document, the department discusses adopted and submitted to EPA to the RACT (CTGs). They these been formally aOCIPt<::o in the SIP, and that the 4th rule, 10-5 is currently bcing amended and will through the public hearing/adoption process is expected to be sent to for approval in April 2012.RESPONSE AND EXPLANATION OF CHANGE: The plan has been revised to clarify that only 3 ofthe 4 CTGs listed in that section of the document have been submitted to EPA, and it outlines the anticipated schedule for the adoption and submittal of 10 CSR 10-5.455 to EPA. Due to the similar nature ofthe next two comments, one (1) response follows this group of two (2) comments: COMMENT #3: EPA commented that on page 43 of the document in Table 7.2 Contingency Measures, the reference to future federal control measures should be removed from the contingency measures table and simply discussed in the narrative section instead. COMMENT #4: EPA commented that on page 43 of the document in Table 7.2 Contingency Measures, the potential contingency measure "more stringent controls for local sources to be required on days that are conducive to ozone formation" be removed from the contingency measures table and simply discussed in the narrative section instead. RESPONSE AND EXPLANATION OF CHANGE: In response to this comment, the plan has been revised by removing these contingency measure options from Table 7.2 and instead includes a discussion of them in the narrative portion of Section 7 of the plan. COMMENT #5: EPA commented that the method the department used to calculate the daily ozone season emissions from the annual emissions inventory should be explained in further detail in Section 4 of the document. RESPONSE AND EXPLANATION OF CHANGE: As a result ofthis comment, language that explains the method of calculating the ozone season daily emissions from the annual emissions inventory has been added to Section 4 of the document. A more detailed discussion ofthe method used to calculate ozone season day emissions can be found in Appendix E. COMMENT #6: EPA commented that on page 35, Section 5.1, the percentage of emission reductions that are expected to result from mobile source controls between 2008 and 2022 should be compared to the overall emission inventory rather than just the mobile source portion in order to better clarify the impact that these controls are expected to have on the overall inventory. RESPONSE AND EXPLANATION OF CHANGE: As a result of this comment, and in order to provide additional clarity and simplicity for EPA's review of this plan, the plan has been revised so that the percentage of emission reductions expected from mobile source controls between 2008 and 2022 are now compared to the entire emissions inventory in Section 5.1 of the document.**.~** State Plan Actions on Public Notice

- DNR Page 1 of4 Jay Nixon, Governor Sara Parker Pauley, Director 

# Air Pollution Control Program State Plan Actions On Public Notice 

### I Proposed for Adoption On Public Notice The following proposed state plan actions are on public notice and comments are being accepted through the closing dates listed below. 2008 Base Year Emissions Inventory for the Missouri Portion of the St. Lo'uis Ozone Nonattainment Area Appendix A - List of Statewide Point Source Annual Emissions by Facility Appendix B - List of Onroad Annual Emissions by SCC for FrankUn and Jefferson Counties Appendix C - List of Onroad Annual Emissions by SCC for St. Charles and St. Louis Counties and St. Louis City Appendix D - 2008 Nonroad Inventory Documentation Appendix E - Nonroad Ozone Season Day Emissions by SCC Appendix F - Nonpoint ICI Combustion Methodology Appendix G - Temporal Allocation Appendix H - EIQ Forms In accordance with Section 172(c)(3) of the Clean Air Act, the Missouri Department of Natural Resources' Air Pollution Control Program has developed a comprehensive, accurate, current inventory of actual emissions from all sources of the relevant pollutants in the Missouri Portion of the St. Louis Ozone Nonattainment Area for the 1997 8-hour ozone standard. This 2008 Base Year Emissions Inventory provides average ozone season day (050) emissions in tons for ozone precursors: volatile organic compounds, carbon monoxide, and nitrogen oxides. This information will be on Public Notice for thirty (30) days beginning on August 8, 2011 and ending at the close of business on September 7, 2011. Written comments on this inventory should be sent to the attention of Wendy Vit, Air Quality Planning Section Chief at P.O. Box 176, Jefferson City, MO 65102-0176 or emailed to apcpsip@dnr.mo.gov

.
8 /

812 011 http://dnr.mo.gov/env/apcp/stateplanrevisions.htmState Plan Actions on Public Notice

- DNR Page 2 of4
A public hearing will be set at the request of any interested party. Any requests for a public hearing should be sent to the attention of Wendy Vit, at the above address or by fax to (573) 751-2706 and must be received by noon, August 29, 2011

2008 Base Year Emissions Inventory for the Missouri Portion of the St. Louis Fine Particulate Matter (PM2.5) Nonattainment Area Appendix A - Point Source Emissions by Facility Appendix B - Onroad Emissions for Franklin and Jefferson Counties Appendix C - Onroad Emissions for st. Charles and St. Louis Counties and St. Louis City Appendix D - Nonroad Inventory Documentation Appendix E - Nonroad Emissions Appendix F - Nonpoint IndustriaL and CommerciaL/InstitutionaL FueL Combustion MethodoLogy In accordance with Section 172(c)(3) of the CLean Air Act, the Missouri Department of NaturaL Resources Air Pollution ControL Program has deveLoped a comprehensive, accurate, current inventory of actuaL emissions from aLL sources of the reLevant pollutants in the Missouri Portion of the St. Louis fine particulate matter (PM2.5) Nonattainment Area for the 1997 annuaL PM2.5 standard. In order to make this 2008 Base Year Emissions Inventory potentially applicabLe for other future needs, it includes emissions per year for all of the following pollutants: carbon monoxide, ammonia, oxides of nitrogen, PM10, PM2.5, sulfur dioxide and volatile organic compounds. This information will be on Public Notice for 30 days beginning on July 13, 2011 and ending at the close of business on Aug. 12, 2011. Written comments on this inventory should be sent to the attention of Wendy Vit, Air Quality Planning Section Chief at P.O. Box 176, Jefferson City, MO 65102-0176 or emailedtoapcpsip@dnr.mo.gov. A public hearing will be set at the request of any interested party. Any requests for a public hearing should be sent to the attention of Wendy Vit, at the above address or byJax to 573-751-2706 and must be received by noon, Aug. 2, 2011.

Back to top Proposed for Adoption 2010 1-Hour Sulfur Dioxide Boundary Designation Recommendation

http://dnr
.mo.goy/eny/apcp/stateplanreYisions
. htm 8/8/2011**~** State Plan Actions on Public Notice

- DNR Page 3 of4


### In June 2010, the U.S. Environmental Protection Agency issued a revision to the National Ambient Air Quality Standard for sulfur dioxide of 75 parts per billion measured over one hour. Release of this standard started a time clock with a deadline of June 2011 for the governor of the State of Missouri to submit a recommendation to EPA as to which areas of the state should be designated as non attainment for the new sulfur dioxide standard. Portions of Greene, Jackson, and Jefferson counties are recommended as nonattainment for this standard. Comments were accepted through May 5, 2011. The department did not receive any comments. 2010 1-Hour Sulfur Dioxide Boundary Designation Recommendation and Technical Support Document Missouri State Implementation Plan -- The Doe Run Company Herculaneum Facility -­ Modification to Consent Judgment As part of the Consent Judgment entered into by Missouri Department of Natural Resources and The Doe Run : Company, the provision entitled "Fence I.ine to Preclude Public Access" includes a statement that Doe Run will not construct any new lead emission sources between the existing fence line and any new fence line. The purpose of this revision is to modify this statement to allow for the construction of a new lead technological process, but continue to restrict the construction of traditional pyrometallurgical lead processes within this area. Comments were accepted through May 5, 2011. The department did not receive any comments. Proposed Revision to the Missouri State Implementation Plan: Reasonably Available Control Technology Demonstration Update for the 1997 8-Hour Ozone Standard St. Louis Nonattainment Area The Missouri Department of Natural Resources' Air Pollution Control Program is proposing to amend the Missouri State Implementation Plan. This proposed change to the State Implementation Plan is an update to the 2006 Reasonably Available Control Technology demonstration and certifies that current rules, including those proposed for amendment, fulfill the Reasonably Available Control Technology requirements for aU applicable sources of ozone precursors in the Missouri'portion of the St. Louis ozone nonattainment area under the 1997 8 - hour ozone National Ambient Air Quality Standards. Comments were accepted through April 7, 2011. Comments were received on the proposed revision to the Missouri State Implementation Plan. Below is a summary of the comments and responses and the revised document that will be presented for adoption at the April 28, 2011 Missouri Air Conservation Commission meeting. Comments Received and Responses Reasonably Available Control Technology Demonstration Update for the 1997 8-Hour Ozone Standard St. Louis Nonattainment Area

8/812011 http://dnr.mo.gov/env/apcp/stateplanrevisions.htm**~~~~~~-** State 

### Plan Actions on 

### Public Notice

- 

### DNR Page 4 of 4
Back to top

http://dnr.mo.gov/env/apcp/stateplanrevisions.htm 8/8/2011