## Minnesota 

## PollutionControlAgency 52OLafayetteRoad North I St.Paul,MN55155-4194 ) 651-296-6300 1 800-657-3864 / 651-282-5332 TTY / www.pca.state.rnn.us

November 29, 2007 

### Ms. Mary Gade (R-19J) Regional Administrator U.S. Environmental Protection Agency Region V 

### 77 West Jackson Boulevard Chicago, Illinois 60604 RE: 

### Minnesota's 110(a) State Implementation Plan Requirements Dear Ms. Gade: This letter is to certify that Minnesota's State Implementation Plan (SIP) currently meets-the infrastructure requirements of section 110(a)(l) and (2) of the Clean Air Act in regards to the eight hour ozone and particulate matter less than 2.5 microns in diameter (PM2.5) National Ambient Air Quality Standards (NAAQS) promulgated in 1997. The Minnesota Pollution Control Agency (MPCA) has, in prior submittals, documented its authority and ability to provide for the implementation, maintenance and enforcement ofprimary and secondary standards, as well as to adopt enforceable emission limitations and control measures to meet the primary and secondary standards, and to update both state rules and the SIP as necessary. The Minnesota statute that lays out the powers and duties of the MPCA (Minn. Stat. 

## 5 116.07) states, "The agency shall also adopt standards of air quality, including maximum allowable standards of emission of air contaminants from motor vehicles[.]" It goes on to give the agency the authority to "[Aldopt, amend, and rescind rules and standards having the force of law relating to any purpose.. .for the prevention, abatement, or control of air pollution." This statute also gives the agency the authority to enforce any provisions of the chapter relating to air contamination, including entering into orders, schedules of compliance and stipulation agreements, requiring owners or operators of emission facilities to install and operate monitoring equipment, and conducting investigations.

St.Paul 1 Brainerd I Detroit Lakes I Duluth I Mankato I Marshall 1 Rochester I Willmar IS0YEARS 

## &sTtL~Z~ODMs. Mary Gade Page 2 Minnesota's SIP-approved air quality rules implement these statutory authorities and broadly cover the criteria pollutants: "sulfur dioxide, particulatematter, nitrogen oxides, carbon monoxide, ozone, lead, and any other pollutants for which national ambient air quality standards have been established" and prohibit emissionsthat cause or contributeto a violation of any ambient air quality standard. Minnesota rules also provide for enforcement to ensure that air quality rules are followed. The MPCA operates an ambient pollutant monitoring network and compiles and reports that information to the U. S. Environmental ProtectionAgency (EPA). Minnesota's air quality rules also make any NAAQS an applicable requirement for stationary sources. Under Minnesota rules, these sourcesmay be required to monitor their emissions and major sources may be required to perform modeling to show that emissions do not cause or contribution to a violation of ambient air quality standards. Stationary sources are also required to pay emission fees to cover the MPCA's air permittingprogram; chargeable pollutants include all pollutants for which a NAAQS has been promulgated. Minnesota operates a delegated Prevention of Significant Deterioration Program to meet the requirements ofparts C and D of the Clean Air Act. Minn. R. ch. 7009 contains the provisions for determiningair quality emergency episodes, and establishes episode levels. The MPCA will revise these levels for PM2.5 and ozone once EPA has determined the appropriate significant harm levels and revised 40 CFR 

## 5 51.150. The MPCA recently submitted a 110(a)(2)(D)SIP revision to meet Minnesota's requirementsto not cause or contribute to NAAQS non-attainmentin any other state. The visibility SIP is forthcoming. Through our discussions with your office, we believe this letter meets our requirements as described in the Guidance of SIP ElementsRequired UnderSections 11O(a)(l) and 

### (2) for the 1997 8-hour Ozone and PM2,5 NationalAmbient Air Quality Standards, issued on October2,2007. Please contact Catherine Neuschler of our staff at 65 1-296-7774if you have any questions regarding Minnesota's SIP. Sincerely,

Brad Moore Commissioner CN: sth cc: Kathleen D'Agostino, EPA Region V 

### (AR-1 8



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