INDIANA DEPARTMENT OF ENVIRONMENTAL MANAGEMENT 

We Protect Hoosiers and Our Environment. 

Michael R. Pence 

Govemor 

Susan Hedman 

Regional Administrator 

U.S. EPA, Region 5 

77 West Jackson Boulevard 

Chicago, Illinois 60604 

Dear Ms. Hedman: 

100 N. Senate Avenue • Indianapolis, IN 46204 

(800) 451-6027 • (317) 232-8603 • www.idem.IN.gov 

August 20, 2014 

Thomas w. Easterly 

Commissioner 

Re: State Implementation Plan Submittal for 

Indiana Regarding 326 lAC 1-3-4, Ozone and 

PM2.5 Standards (LSA #13-358) 

Pursuant to Section 110 of the Clean Air Act and Title 13 of the Indiana Code, the 

Indiana Department of Environmental Management (IDEM) submits an amendment to the 

Indiana state implementation plan. This amendment consists of revisions to Indiana's rules 

concerning the national ambient air quality standards (NAAQS) for ozone and particula~e matter 

with an aerodynamic diameter less than or equal to 2.5 microns (PM2.s), accomplished through 

one rulemaking. IDEM requests that the United States Environmental Protection Agency (U.S. 

EPA) approve 326 lAC 1-3-4. 

Subsections (b)(4) and (b)(8) of326 lAC 1-3-4 have been amended to update the 

NAAQS for ozone and PM2.s in accordance with 40 CFR 50. Subsection (b)( 4) updates the 

primary and secondary 8-hour ozone standards to 0.075 parts per million. Subsection (b)(8) 

updates the annual primary PM2.5 standard to 12 micrograms per cubic meter (!lglm\ The 

existing annual secondary PM2.5 standard is maintained. In addition, revisions have been made 

to update references to ensure consistency with federal regulations. 

This submittal consists of one (1) hard copy of the required documentation. An 

electronic version of the submittal in PDF format that is identical to the hard copy has been sent 

to Chris Panos at the U.S. EPA Region 5 office. In order to assist with your review of this state 

implementation plan submission, a list of supporting documents is attached. 

Throughout the development of these amendments to the existing rule, staff of the Office 

of Air Quality worked closely with your staff to ensure that any potential problems that might 

exist with this requested state implementation plan revision would be resolved. I request that 

U.S. EPA approve this modification of Indiana's state implementation plan. If you have any 

An Equal Opportunity Employer 

() 

A State that Works 

@ Recycled Paper 

-
questions regarding this submittal, please contact Christine Pedersen, Rule Development Section ( 

Chief, Office of Legal Counsel, at (317) 233-5684. 

NK/cep 

Attachments: Supporting Documents 

cc: John Mooney, U.S. EPA Region V (no enclosures) 

Pamela Blakley, U.S. EPA Region 5 (no enclosures) 

Doug Aburano, U.S. EPA Region V (no enclosures) 

Steve Rosenthal, U.S. EPA Region V (no enclosures) 

Christine Pedersen, IDEM (no enclosures) 

SIP file 

( 
Supporting Documents 

Attachment A: Administrative Checklist ( 40 CPR 51, Appendix V) 

Attachment B: Final Rule. LSA Document #13-358(F) as published in the Indiana Register on 

August 6, 2014 (DIN: 20140806-IR-326130358FRA) 

Attachment C: Signature Page 

Attachment D: Section 8 Notice, including the Notice of Public Hearing, as published in the 

Indiana Register on August 21, 2013 (DIN: 20130821-IR-326130358FDA) 

Attachment E: Ce1iificates of Web Publication 

Attachment F: Transcript of Public Hearing, including Exhibit, held on April9, 2014 

ADMINISTRATIVE CHECKLIST ( 40 CFR 51, Appendix V) 

1. The submittal is accompanied by a formal letter of submittal Enclosed 

from the governor or his designee. 

2. Evidence that the State has adopted the plan in the State code Attachment C 

or body of regulations; or issued the permit, order, consent 

agreement ("document"); in final form. 

a. Date of adoption or final issuance: April9, 2014 

b. The effective date of the plan, if different August 7, 2014 

from the adoption/issuance date. 

3. Evidence that the State has the necessary legal authority IC 13-14-8 

under state law to adopt and implement the plan. 

4. A copy of the actual regulation or document submitted for Attachment B 

approval and incorporation by reference into the plan, 

including the following: 

a. Indication of the changes made to the existing 

approved plan, where applicable. 

b. The submittal shall be a copy of the official State 

regulation or document signed, stamped, dated by 

the appropriate state official indicating that it is fully 

enforceable by the State. Effective date shall be stated 

in the document itself. 

5. Evidence that the State followed all of the procedural 

requirements of the State's laws and constitution in 

conducting and completing the adoption/issuance of the plan. 

Attachment C 

6. Evidence that public notice was given, including date of Attachments D and E 

proof of publication. 

_K_Notice ofPublic Hearing and Certificates ofWeb Publication 

7. Ce1iification that public hearings were held in accordance 

with information provided in public hearing notice. 

_x_ Transcript from Public Hearing 

8. Compilation of public comments and State's response. 

Attachment F 

N/A 

Indiana Register 

TITLE 326 AIR POLLUTION CONTROL DIVISION 

Final Rule 

LSA Document #13-358(F) 

DIGEST 

Amends 326 lAC 1-3-4 concerning the national ambient air quality standards for the 2008 8-hour ozone 

standard, and the 2012 annual particulate matter with an aerodynamic diameter less than or equal to 2.5 

micrometers (PM2

.

5

) standard. Effective 30 days after filing with the Publisher. 

HISTORY 

Findings and Determination of the Commissioner Pursuant to IC 13-14-9-8: August 21, 2013, Indiana 

Register (DIN: 20130821-IR-326130358FDA). 

Notice of Hearing: August 21,2013, Indiana Register (DIN: 20130821-IR-326130358PHA). 

Change in Notice of Public Hearing: November 20, 2013, Indiana Register (DIN: 

20131120-IR-326130358CHA). 

Change in Notice of Public Hearing: January 29, 2014, Indiana Register (DIN: 

20140129-IR-326130358CHA). 

Date of Hearing: April 9, 2014. 

326 lAC 1-3-4 

SECTION 1. 326 lAC 1-3-4 IS AMENDED TO READ AS FOLLOWS: 

326 lAC 1-3-4 Ambient air quality standards 

Authority: IC 13-14-8; IC 13-17 -3-4; IC 13-17-3-11 

Affected: IC 13-15; IC 13-17 

Sec. 4. (a) All measurements of air quality that are expressed as mass per unit volume, other than for the 

particulate matter (PM ) standards contained in subsection (b)(8) and lead (Pb) standards contained in 

subsection (b )(6), shalf"i~e corrected to a reference temperature of twenty-five (25) degrees Celsius and a 

reference pressure of seven hundred sixty (760) millimeters of mercury (one thousand thirteen and two-tenths 

(1 ,013.2) millibars), as micrograms per cubic meter (!Jglm\ Measurements of PM2 , for purposes of comparison 

to the standards contained in subsection (b)(8), and Pb, for purposes of comparisori5

to the standards contained in 

subsection (b)(6), shall be reported based on actual ambient air volume measured at the actual ambient 

temperature and pressure at the monitoring site during the measurement period. 

(b) Ambient air quality standards are as follows: 

( 1) Sulfur oxides as sulfur dioxide (SO ) requirements are as follows: 

(A) For the primary one (1) hour amBient air quality standard, the maximum permissible ambient air quality 

level shall be seventy-five (75) parts per billion (ppb ). The one (1) hour standard is attained when the three 

(3) year average of the annual ninety-ninth percentile of the daily maximum one (1) hour average 

concentration is less than or equal to seventy-five (75) ppb, as determined in accordance with 40 CFR 50, 

Appendix T* and measured in the ambient air as S02 by a reference method based on 40 CFR 50, 

Appendix A-1 *or 40 CFR 50, Appendix A-2*, or an equivalent method designated in accordance with 40 

CFR 53*. 

(B) For the secondary standard, the following value shall represent the maximum permissible ambient air 

quality level: one thousand three hundred (1 ,300) 1Jg/m3 (five-tenths (0.5) ppm) maximum three (3) hour 

concentration not to be exceeded more than once per year. The three (3) hour averages shall be 

determined from successive nonoverlapping three (3) hour blocks starting at midnight each calendar day 

and shall be rounded to one (1) decimal place (fractional parts equal to or greater than five-hundredths 

(0.05) ppm shall be rounded up). Sulfur oxides shall be measured in the ambient air as S02 by the 

reference method described in 40 CFR 50, Appendix A-1 * or 40 CFR 50, Appendix A-2*, or by an equivalent 

method designated in accordance with 40 CFR 53*. To demonstrate attainment, the second-highest three 

(3) hour average must be based upon hourly data that are at least seventy-five percent (75%) complete in 

each calendar quarter. A three (3) hour block average shall be considered valid if: 

(i) all three (3) hourly averages for the three (3) hour period are available; or 

(ii) only one (1) or two (2) hourly averages are available, but the three (3) hour average would exceed the 

level of the standard when zeros are substituted for the missing values, subject to the rounding rule of this 

Date: Aug 19,2014 9:47:02AM EDT DIN: 20140806-IR-326130358FRA Page 1 
Indiana Register 

clause. 

In all cases, the three (3) hour block average shall be computed as the sum of the hourly averages divided 

by three (3). 

(C) 802 values may be converted to ppm using the conversion factor two thousand six hundred twenty 

(2,620) 1Jg/m3 = one (1) ppm. 

(2) Total suspended particulates (TSP) requirements are as follows: 

(A) For primary standards, the following values shall represent the maximum permissible ambient air quality 

levels: 

(i) Seventy-five (75) 1Jg/m3 annual geometric mean. 

(ii) Two hundred sixty (260) 1Jg/m3 maximum twenty-four (24) hour average concentration not to be 

exceeded more than one ( 1) day per year. 

(B) For secondary standards, the following value shall represent maximum permissible ambient air quality 

levels: one hundred fifty (150) 1Jg/m3 maximum twenty-four (24) hour average concentration not to be 

exceeded more than one (1) day per year. 

(3) Carbon monoxide (CO) requirements are as follows: 

(A) For primary and secondary standards, the following values shall represent the maximum permissible 

ambient air quality levels: 

(i) Ten (10) milligrams per cubic meter (mg/m3

) (ten thousand (10,000) 1Jg/m3) (nine (9) ppm) maximum 

eight (8) hour averape concentration not to be exceeded more than once per year. 

(ii) Forty (40) mg/m (forty thousand (40,000) 1Jg/m3

) (thirty-five (35) ppm) maximum one (1) hour average 

concentration not to be exceeded more than once per year. 

(B) CO values may be converted to ppm using the conversion factor one thousand one hundred forty-five 

(1,145) 1Jg/m3 =one (1) ppm. 

(4) Ozone (03

) requirements are as follows: 

(A) For the one (1) hour ozone standards, the level of the one (1) hour primary and secondary ambient air 

quality standards for ozone measured by a reference method based on 40 CFR 50, Appendix D* and 

desi~nated in accordance with 40 CFR 53* is twelve-hundredths (0.12) ppm (two hundred thirty-five (235) 

IJg/m ). The standard is attained when the expected number of days per calendar year with maximum hourly 

average concentrations above twelve-hundredths (0.12) ppm (two hundred thirty-five (235) 1Jg/m3

) is equal 

to or less than one (1) as determined by 40 CFR 50, Appendix H*. 

(B) For the eight (8) hour ozone standards, the: 

(i) level of the eight (8) hour primary and secondary ambient air quality standards for ozone, measured by a 

reference method based on 40 CFR 50, Appendix D* and designated in accordance with 40 CFR 53*, is 

eight hundredths (0.08) seventy-five thousandths (0.075) ppm, daily maximum eight (8) hour average; 

and 

(ii) eight (8) hour primary and secondary ozone ambient air quality standards are met at an ambient air 

quality monitoring site when the average of the annual fourth highest daily maximum eight (8) hour average 

ozone concentration is less than or equal to eight hundredths (0.08) seventy-five thousandths (0.075) 

ppm as determined in accordance with 40 CFR 50, Appendix~ P*. 

(C) 0.3 values may be converted to ppm using the conversion factor one thousand nine hundred sixty-five 

(1 ,96o) 1Jg/m3 = 1.0 ppm. 

(5) Nitrogen dioxide (N02

) requirements are as follows: 

(A) For the primary one (1) hour ambient air quality standard, the maximum permissible ambient air quality 

level shall be one hundred (100) ppb, one (1) hour average concentration, measured in the ambient air as 

N02

. The one (1) hour standard is attained when the three (3) year average of the annual ninety-eighth 

percentile of the daily maximum one (1) hour average concentration is less than or equal to one hundred 

(100) ppb, as determined in accordance with 40 CFR 50, Appendix S*. 

(B) For the annual primary standard, the following value shall represent the maximum permissible ambient 

air quality level: one hundred (1 00) 1Jg/m3 (fifty-three thousandths (0.053) ppm) annual average 

concentration in a calendar year. The annual primary standard is attained when the annual average 

concentration in a calendar year is less than or equal to fifty-three (53) ppb, as determined in accordance 

with 40 CFR 50, Appendix S* for the annual standard. 

(C) For the annual secondary standard, the following value shall represent the maximum permissible 

ambient air quality level: one hundred (100) 1Jg/m3 (fifty-three thousandths (0.053) ppm) annual arithmetic 

mean concentration in a calendar year. The secondary standard is attained when the annual arithmetic 

mean concentration in a calendar year is less than or equal to fifty-three thousandths (0.053) ppm, rounded 

to three (3) decimal places (fractional parts equal to or greater than five ten-thousandths (0.0005) ppm must 

be rounded up). To demonstrate attainment, an annual mean must be based upon hourly data that are at 

least seventy-five percent (75%) complete or upon data derived from manual methods that are at least 

seventy-five percent (75%) complete for the scheduled sampling days in each calendar quarter. 

(D) N02 values may be converted to ppm using the conversion factor one thousand eight hundred eighty 

Date: Aug 19,2014 9:47:02AM EDT DIN: 20140806-IR-326130358FRA Page 2 
Indiana Register 

(1 ,880) 1-Jg/m = one (1) ppm. 

(E) The levels of the standards shall be measured by: 

(i) a reference based on 40 CFR 50, Appendix F*; or 

(ii) an equivalent method designated in accordance with 40 CFR 53*. 

(6) Pb: For primary and secondary standards, the following value shall represent the maximum permissible 

ambient air quality level: fifteen-hundredths (0.15) 1Jg/m3

, arithmetic mean concentration over a three (3) 

month period. The standards are attained when the maximum arithmetic three (3) month mean concentration 

for a three (3) year period is less than or equal to fifteenth-hundredths (0.15) 1Jg/m3

, as determined in 

accordance with 40 CFR 50, Appendix R* and measured in the ambient air as Pb by either: 

(A) a reference method based on 40 CFR 50, Appendix G*, and designated in accordance with 40 CFR 53*; 

or 

(B) an equivalent method designated in accordance with 40 CFR 53*. 

(7) PM1 : For primary and secondary standards, the maximum permissible ambient air quality level is one 

hundre~fifty (150) 1Jg/m3 maximum twenty-four (24) hour average concentration. The standards are attained 

when the expected number of days per calendar year with a twenty-four (24) hour average concentration 

above one hundred fifty (150) 1-Jg/m , as determined in accordance with 40 CFR 50, Appendix K,* is equal to or 

less than one (1 ). 

(8) PM 5 requirements are as follows: 

(A) For the primary and se-oondary standards, annual standard, the following ¥aH:tes value shall represent 

the maximum permissible ambient air quality levels:(/\) Fifteen (15) level: twelve (12) micrograms per 

cubic meter (1Jg/m3

) annual arithmetic mean concentration. The standards are standard is attained when 

the annual arithmetic mean concentration is less than or equal to fifteen (15) twelve (12) 1Jg/m3

, as 

determined in accordance with 40 CFR 50, Appendix N*, as amended by 78 FR 3277, and measured in the 

ambient air as PM2 by either: 

(i) a reference met~od based on 40 CFR 50, Appendix L*, and designated in accordance with 40 CFR 53*; 

or 

(ii) an equivalent method designated in accordance with 40 CFR 53*. 

(B) For the secondary annual standard, the following value shall represent the maximum permissible 

ambient air quality level: fifteen (15) micrograms per cubic meter (1Jg/m3

) annual arithmetic mean 

concentration. The standard is attained when the annual arithmetic mean concentration is less than 

or equal to fifteen (15) 1Jg/m3

, as determined in accordance with 40 CFR 50, Appendix N*, as 

amended by 78 FR 3277, and measured in the ambient air as PM2 5 by either: 

(i) a reference method based on 40 CFR 50, Appendix L*, and de"signated in accordance with 40 

CFR 53*; or 

(ii) an equivalent method designated in accordance with 40 CFR 53*. 

fB1 (C) For the primary and secondary 24-hour standard, the following value shall represent the 

maximum permissible ambient air quality level: thirty-five (35) 1Jg/m3 twenty-four (24) hour average 

concentration. The standards are attained when the ninety-eighth percentile twenty-four (24) hour 

concentration is less than or equal to thirty-five (35) micrograms per cubic meter (1Jg/m3

), as determined in 

accordance with 40 CFR 50, Appendix N*, as amended by 78 FR 3277, and measured in the ambient air 

as PM2 by either: 

(i) a reference method based on 40 CFR 50, Appendix L*, and designated in accordance of 40 CFR 53*; or 

(ii) an equivalent method designated in accordance with 40 CFR 53*. 

*These documents are incorporated by reference. Copies may be obtained from the Government Printing 

Office, 732 North Capitol Street NW, Washington, D.C. 20401 or are available for review and copying at the 

Indiana Department of Environmental Management, Office of Air Quality, Legal Counsel, Indiana Government 

Center North, =t=effil:t Thirteenth Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204. 

(Air Pollution Control Division; 326 lAC 1-3-4; filed Mar 10, 1988, 1:20 p.m.: 11 IR 2378; filed Apr 13, 1988, 3:35 

p.m.: 111R 3020; readopted filed Jan 10, 2001, 3:20p.m.: 241R 1477; filed May 21, 2002, 10:20 a.m.: 251R 

3055; filed Mar 9, 2004, 3:45p.m.: 271R 2224; filed Dec 20, 2004, 2:15p.m.: 281R 1471; filed Mar 6, 2006, 3:00 

p.m.: 29/R 2179; filed Sep 24, 2010, 1:44 p.m.: 20101020-IR-326100127FRA; filed Feb 9, 2011, 10:29 a.m.: 

20110309-IR-326100495FRA; filed Dec 19, 2012, 4:22p.m.: 20130116-IR-326120510FRA; filed Jul8, 2014, 2:28 

p.m.: 20140806-IR-326130358FRA) 

LSA Document #13-358(F) 

Findings and Determination of the Commissioner Pursuant to IC 13-14-9-8: 20130821-IR-326130358FDA 

Hearing Held: April 9, 2014 

Approved by Attorney General: July 3, 2014 

Date: Aug 19,2014 9:47:02AM EDT DIN: 20140806-IR-326130358FRA Page 3 
Indiana Register 

Approved by Governor: July 8, 2014 

Filed with Publisher: July 8, 2014, 2:28p.m. 

Documents Incorporated by Reference: None Received by Publisher 

Small Business Regulatory Coordinator: Jessica Faust-Hamblin, IDEM Small Business Regulatory Coordinator, 

IGCN 1225, 100 North Senate Avenue, Indianapolis, IN 46204-2251, (317) 232-8172 or (BOO) 988-7901, 

ctap@idem.in.gov 

Small Business Assistance Program Ombudsman: Steven N. Howell, IDEM Small Business Assistance Program 

Ombudsman, IGCN 1301, 100 North Senate Avenue, Indianapolis, IN 46204-2251, (317) 232-8587 or (800) 

451-6027, snhowell@idem.in.gov 

Posted: 08/06/2014 by Legislative Services Agency 

An html version of this document. 

Date: Aug 19,2014 9:47:02AM EDT DIN: 20140806-IR-326130358FRA Page 4 
Rule Signature-Page 

Rule#: 

Agency: 

Subject: 

ADOPTED: 

LSA Document #13-358(F) 

Environmental Rules Board 

Ozone and· PM25 Standards 

By.d.;fl'dQ~ Beverly~ · 

Chairperson, Environmental Rules Board 

APPROVED: 

:~e: p;/~ (/ l/. ~~ \ 

By: c/LJ!.-.J! 

~ fl. e--- Date ~~g\l~ Govemor, State of Indiana 

ACCEPTED FOR FILING: 

By: - TITLE 326 AIR POLLUTION CONTROL DIVISION 

LSADocument#l3-358(FR) · 

Filed with Publisher: July 8. 2014. 2:28 p.m. 

By:K.ks 

Indiana Register 

TITLE 326 AIR POLLUTION CONTROL DIVISION 

FINDINGS AND DETERMINATION OF THE COMMISSIONER 

PURSUANT TO IC 13-14-9-8 AND DRAFT RULE 

LSA Document #13-358 

NATIONAL AMBIENT AIR QUALITY STANDARDS FOR OZONE AND PM2

.

5 

PURPOSE OF NOTICE 

The Indiana Department of Environmental Management (IDEM) has developed draft rule language for 

amendments to Indiana's rules at 326 lAC 1-3-4 concerning the national ambient air quality standards for the 

2008 8-hour ozone standard, and the 2012 annual particulate matter with an aerodynamic diameter less than or 

equal to 2.5 micrometers (PM2 5) standard. IDEM is soliciting written comment on the draft rule language and will 

schedule a public hearing before the Environmental Rules Board for consideration of adoption of these rules. 

CITATIONS AFFECTED: 326 lAC 1-3-4. 

AUTHORITY: IC 13-14-8; IC 13-17. 

STATUTORY REQUIREMENTS 

IC 13-14-9-8 recognizes that, under certain circumstances, it may be appropriate to reduce the number of 

public comment periods and public hearings usually provided for under the IC 13-14-9 environmental rulemaking 

process. In cases where the commissioner determines that there is no reasonably anticipated benefit from a 

second public comment period and first public hearing to either the environment or persons regulated or 

otherwise affected by the proposed rule, IDEM may forgo these comment periods and proceed directly to the 

public hearing and board meeting at which the draft rule is considered for adoption. Two opportunities for public 

comment (with this notice and at the public hearing prior to adoption of the rule) remain under this procedure. 

If the commissioner makes the determination of no anticipated benefit required by IC 13-14-9-8, the 

commissioner shall prepare written findings and publish those findings in the Indiana Register prior to the board 

meeting at which the draft rule is to be considered for adoption and include them in the board packet prepared for 

that meeting. This document constitutes the commissioner's written findings pursuant to IC 13-14-9-8. 

The statute provides for this shortened rulemaking process if the commissioner determines that: 

(1) the rule constitutes: 

(A) an adoption or incorporation by reference of a federal law, regulation, or rule that: 

(i) is or will be applicable to Indiana; and 

(ii) contains no amendments that have a substantive effect on the scope or intended application of the 

federal law or rule; 

(B) a technical amendment with no substantive effect on an existing Indiana rule; or 

(C) an amendment to an existing Indiana rule, the primary and intended purpose of which is to clarify the 

existing rule; and 

(2) the rule is of such nature and scope that there is no reasonably anticipated benefit to the environment or 

the persons referred to in IC 13-14-9-7(a)(2) from: 

(A) exposing the rule to diverse public comment under IC 13-14-9-3 or IC 13-14-9-4; 

(B) affording interested or affected parties the opportunity to be heard under IC 13-14-9-3 or IC 13-14-9-4; 

and 

(C) affording interested or affected parties the opportunity to develop evidence in the record collected 

under IC 13-14-9-3 and IC 13-14-9-4. 

BACKGROUND 

The Clean Air Act (CAA) requires that the United States Environmental Protection Agency (U.S. EPA) set 

primary and secondary National Ambient Air Quality Standards (NAAQS) for the six criteria air pollutants 

considered harmful to public health and the environment. These pollutants are carbon monoxide, lead, nitrogen 

dioxide, ozone, particulate matter (PM), and sulfur dioxide. The CAA requires U.S. EPA to set health-based or 

"primary" standards at a level judged to be "requisite to protect the public health with an adequate margin of 

safety" and to establish secondary standards that are designed to protect against welfare effects, defined as "any 

known or anticipated adverse effects associated with the pollutant in the ambient air" including effects on crops, 

vegetation, wildlife, and visibility. Sections 108 and 109 of the CAA govern the review and revision of these 

standards once every five years to determine whether revisions to the standards are appropriate. 

Ground-level ozone is formed from a series of chemical reactions between nitrogen oxides and volatile 

organic compounds (VOCs) in the presence of sunlight. Automobile emissions, industrial facilities, electric utilities, 

and gasoline vapors from refueling are primary sources of ozone forming compounds. Exposure to high ozone 

Date: Aug 19,2014 10:09:02AM EDT DIN: 20130821-IR-326130358FDA Page 1 
Indiana Register 

levels can be harmful to more vulnerable populations such as the elderly, children, and those with chronic 

conditions like asthma, bronchitis, and emphysema. Adverse health effects from ozone exposure include chest 

pain, throat irritation, coughing, and congestion, in addition to reduced lung function and inflammation in the lining 

of the lungs. 

U.S. EPA issued a revised primary and secondary NAAQS for ozone in the March 27, 2008, Federal Register 

(FR) published at 73 FR 16511. Ozone standards were initially promulgated in 1971, with 1-hour standards set at 

0.08 parts per million (ppm) for total photochemical oxidants. In 1979, U.S. EPA revised the NAAQS from an 

hourly average of 0.08 ppm oxidant to an hourly average of 0.12 ppm ozone. In 1997, U.S. EPA revised the 

standard again, setting the new limit at 0.08 ppm averaged over an 8-hour time frame. U.S. EPA made further 

revisions to the standards as legally mandated in the CAA, increasing the stringency of 8-hour ozone standards to 

provide increased protection for public health and welfare. In the 2008 revision, U.S. EPA further lowered the 

8-hour ozone standard to 0.075 ppm. 

In this rulemaking, IDEM is proposing to amend 326 lAC 1-3-4 to incorporate portions of 40 CFR 50.15, 

revise the 8-hour ozone standard to 0.075 ppm, and update references to ensure consistency with federal 

regulations. 

PM is defined as a mixture of extremely small particles and liquid droplets composed of a number of different 

chemicals, including organic chemicals, metals, soil, or dust particles. Primary particles are generated from a 

number of activities, and are emitted directly from a source, such as construction sites, smokestacks, and fires. 

Additional forms can be generated as secondary particles through atmospheric reactions involving chemicals 

such as sulfur dioxide and nitrogen oxides emitted from industrial sources, automobiles, and power plants. The 

NAAQS for PM are differentiated by the U.S. EPA according to the diameter of the particle, with separate 

standards for PM2 5, and for particulate matter with an aerodynamic diameter less than or equal to 1 0 micrometers 

(PMl0

). Exposure to high levels of PM can be harmful to more vulnerable populations such as children, elderly, 

and nose with lung disease. PM

2 5 related adverse health effects include increased hospital admissions and 

stays, emergency department vis1ls, and chronic respiratory issues requiring medical attention. The NAAQS are 

further differentiated by averaging time, with PM2 5 primary and secondary standards in place for 24-hour 

averages to protect against acute exposures, ana for annual averages to protect against chronic exposure. PM10 primary and secondary standards are 24-hour averages only. 

U.S. EPA first established standards for PM in 1971 as "total suspended particles (TSP)". In the 1987 

NAAQS revision, TSP was redefined as PM10, and primary and secondary standards were aggregated. In the 

1997 revisions, the regulatory structure distinguished PM2 5 and PM.J!l! with separate standards for each class of 

particulate, and 24-hour and annual averaging times for each. The I"M2..5 24-hour standard was lowered in the 

2006 NAAQS revision, and the PM annual standard was revoked. U.~. EPA issued revised primary annual 

NAAQS for PM2 5 on January 15, 21P13, published at 78 FR 3277 where further distinctions were made in primary 

and secondary regulation of PM2 5

, and PM

10 standards were left unchanged from the 2006 revisions. The 

primary annual PM 

5 standard w·as lowered Trom 15.0 1Jg/m3 to 12.0 1Jg/m3

, and the secondary standard was 

retained at 15.0 1JgTm3. The 24-hour standard was retained in level (35 1Jg/m3) and in form (ninety-eighth 

percentile}, providing supplementary protection against acute exposure events. U.S. EPA is additionally revising 

the form of the primary and secondary annual PM2 5 standards to remove the option for spatial averaging in order 

to avoid the potential for disproportionate impacts on at-risk populations. 

In this rulemaking, IDEM is proposing to amend 326 lAC 1-3-4 to incorporate portions of 40 CFR 50.18, 

revising the annual primary PM2 5 standard to 12 1Jg/m3

. Existing secondary PM2 5 standards are maintained, and 

references are updated to ensure consistency with federal regulations. · 

IC 13-14-9-41dentification of Restrictions and Requirements Not Imposed under Federal Law 

No element of this draft rule imposes restrictions or requirements on persons to whom the draft rule applies 

that is not imposed under federal law. This draft rule imposes no restrictions or requirements because it is a direct 

adoption of federal requirements that are applicable to Indiana and contains no amendments that have a 

substantive effect on the scope or application of the federal rule. 

Potential Fiscal Impact 

This rulemaking will amend the 8-hour ozone standard, incorporating portions of 40 CFR 50.15 ensuring 

consistency with federal regulations. Also amended in this rulemaking is the PM2 5 

annual primary standard, 

incorporating portions of 40 CFR 50.18 to ensure consistency with federal regulations. 

The strengthening of the ozone standard is not anticipated to impose additional costs beyond those 

anticipated at the federal level. The Regulatory Impact Analysis (RIA) of the 0.075 ppm ozone standard published 

by the U.S. EPA in 2008 did not indicate increased economic burden to the state as a result of the more stringent 

ozone regulations. 

The strengthening of the PM standard is not anticipated to impose additional costs beyond those anticipated 

at the federal level, as existing standards including clean diesel rules for vehicles and fuels, and rules to reduce 

pollution from power plants, marine vessels, and locomotives already in place will help 99 percent of counties 

Date: Aug 19,2014 10:09:02AM EDT DIN: 20130821-IR-326130358FDA Page2 
Indiana Register 

meet the revised PM

2 5 standards without further emissions reductions. U.S. EPA estimates that meeting the new 

PM2 primary annual·standard of 12 1Jg/m3 will provide significant health benefits. 

~ecause these are an incorporation of existing federal law, no impact beyond that already imposed by the 

federal law is imposed by this rulemaking. Therefore there will be no fiscal impact from the implementation of this 

rulemaking. 

Public Participation and Work Group Information 

At this time, no work group is planned for the rulemaking. If you feel that a work group or other informal 

discussion on the rule is appropriate, please contact Zachary Ruzycki, Rule Development Branch, Office of Legal 

Counsel at (317) 232-8229 or (800) 451-6027 (in Indiana). 

Small Business Assistance Information 

IDEM established a compliance and technical assistance program (CTAP) under IC 13-28-3. The program 

provides assistance to small businesses and information regarding compliance with environmental regulations. In 

accordance with IC 13-28-3 and IC 13-28-5, there is a small business assistance program ombudsman to provide 

a point of contact for small businesses affected by environmental regulations. Information on the CTAP program, 

the monthly CT AP newsletter, and other resources available can be found at: 

www.in.gov/idem/ctap 

For purposes of IC 4-22-2-28.1, small businesses affected by this rulemaking may contact the Small 

Business Regulatory Coordinator: 

Jessica Faust-Hamblin 

IDEM Small Business Regulatory Coordinator 

MC 60-04 IGCS W041 

100 North Senate Avenue 

Indianapolis, IN 46204-2251 

(317) 232-8172 or (800) 988-7901 

ctap@idem.in.gov 

For purposes of IC 4-22-2-28.1, the Small Business Ombudsman designated by IC 5-28-17-5 is: 

Eric P. Shields 

Indiana Economic Development Corporation 

One North Capitol, Suite 700 

Indianapolis, IN 46204 

(317) 234-3997 

smallbizombudsman@iedc.in.gov 

Resources available to regulated entities through the small business ombudsman include the ombudsman's 

duties stated in IC 5-28-17-5, specifically IC 5-28-17-5(9), investigating and attempting to resolve any matter 

regarding compliance by a small business with a law, rule, or policy administered by a state agency, either as 

a party to a proceeding or as a mediator. 

The Small Business Assistance Program Ombudsman is: 

Brad Baughn 

IDEM Small Business Assistance Program Ombudsman 

MC 50-01 IGCN 1301 

100 North Senate Avenue 

Indianapolis, IN 46204-2251 

(317) 234-3386 or (800) 451-6027 

bbaughn@idem.in.gov 

FINDINGS 

The commissioner of IDEM has prepared findings regarding rulemaking on ambient air quality standards as 

required by federal rule. These findings are prepared under IC 13-14-9-8 and are as follows: 

(1) This rule is the direct adoption of federal requirements that are applicable to Indiana and it contains no 

amendments that have a substantive effect on the scope or intended application of the federal rule. 

(2) Indiana is required by federal law to adopt ambient air quality standards as established by the U.S. 

Environmental Protection Agency. 

(3) Regulated entities or those otherwise affected by the proposed rule will benefit from prompt adoption of 

this rule, as it offers consistency between federal and state ambient air quality standards. 

(4) I have determined that, under the specific circumstances pertaining to this rule, there would be no 

reasonably anticipated benefit to the environment or to persons regulated or otherwise affected by the 

proposed rule from the first or second public written comment period under IC 13-14-9-3 or IC 13-14-9-4, or 

from the first public hearing under IC 13-14-9-5(a)(1). 

(5) The draft rule is hereby incorporated into these findings. 

Date: Aug 19,201410:09:02AM EDT DIN: 20130821-IR-326130358FDA Page 3 
Indiana Register 

Thomas W. Easterly 

Commissioner 

Indiana Department of Environmental Management 

REQUEST FOR PUBLIC COMMENTS 

This notice requests the submission of comments on the draft rule language, including suggestions for 

specific revisions to language to be contained in the draft rule. Comments may be submitted in one of the 

following ways: 

(1) By mail or common carrier to the following address: 

LSA Document #13-358 

Zachary Ruzycki- Mail Code 61-50 

Rule Development Branch 

Office of Legal Counsel 

Indiana Department of Environmental Management 

Indiana Government Center North 

100 North Senate Avenue 

Indianapolis, IN 46204-2251 

(2) By facsimile to (317) 233-5970. Please confirm the timely receipt of your faxed comments by calling the 

Rule Development Branch at (317) 233-8903. 

(3) By electronic mail to zruzycki@idem.in.gov. To confirm timely delivery of your comments, please request 

a document receipt when you send the electronic mail. PLEASE NOTE: Electronic mail comments will 

NOT be considered part of the official written comment period unless they are sent to the address 

indicated in this notice. 

(4) Hand delivered to the receptionist on duty at the thirteenth floor reception desk, Office of Legal Counsel, 

Indiana Government Center North, 100 North Senate Avenue, Indianapolis, Indiana. 

Regardless of the delivery method used, to properly identify each comment with the rulemaking action it is 

intended to address, each comment document must clearly specify the LSA document number of the rulemaking 

you are commenting on. 

COMMENT PERIOD DEADLINE 

All comments must be postmarked, faxed, or time stamped not later than September 20, 2013. 

Hand-delivered comments must be delivered to the appropriate office by 4:45 p.m. on the above-listed deadline 

date. 

Additional information regarding this action may be obtained from Zachary Ruzycki, Rule Development 

Branch, Office of Legal Counsel, (317) 232-8229 or (800) 451-6027 (in Indiana). 

DRAFT RULE 

SECTION 1. 3261AC 1-3-41S AMENDED TO READ AS FOLLOWS: 

326 lAC 1-3-4 Ambient air quality standards 

Authority: IC 13-14-8; IC 13-17 -3-4; IC 13-17-3-11 

Affected: IC 13-15; IC 13-17 

Sec. 4. (a) All measurements of air quality that are expressed as mass per unit volume, other than for the 

particulate matter (PM ) standards contained in subsection (b )(8) and lead (Pb) standards contained in 

subsection (b )(6), shalf-Be corrected to a reference temperature of twenty-five (25) degrees Celsius and a 

reference pressure of seven hundred sixty (760) millimeters of mercury (one thousand thirteen and two-tenths 

(1,013.2) millibars), as micrograms per cubic meter (1Jg/m3

). Measurements of PM2 5, for purposes of comparison 

to the standards contained in subsection (b )(8), and Pb, for purposes of comparison to the standards contained in 

subsection (b)(6), shall be reported based on actual ambient air volume measured at the actual ambient 

temperature and pressure at the monitoring site during the measurement period. 

(b) Ambient air quality standards are as follows: 

(1) Sulfur oxides as sulfur dioxide (SO ) requirements are as follows: 

(A) For the primary one (1) hour amBient air quality standard, the maximum permissible ambient air quality 

level shall be seventy-five (75) parts per billion (ppb ). The one (1) hour standard is attained when the three 

(3) year average of the annual ninety-ninth percentile of the daily maximum one (1) hour average 

concentration is less than or equal to seventy-five (75) ppb, as determined in accordance with 40 CFR 50, 

Date: Aug 19,2014 10:09:02AM EDT DIN: 20130821-IR-326130358FDA Page4 
Indiana Register 

Appendix T* and measured in the ambient air as S02 by a reference method based on 40 CFR 50, 

Appendix A-1* or 40 CFR 50, Appendix A-2*, or an equivalent method designated in accordance with 40 

CFR 53*. 

(B) For the secondary standard, the following value shall represent the maximum permissible ambient air 

quality level: one thousand three hundred (1 ,300) 1Jg/m3 (five-tenths (0.5) ppm) maximum three (3) hour 

concentration not to be exceeded more than once per year. The three (3) hour averages shall be 

determined from successive nonoverlapping three (3) hour blocks starting at midnight each calendar day 

and shall be rounded to one (1) decimal place (fractional parts equal to or greater than five-hundredths 

(0.05) ppm shall be rounded up). Sulfur oxides shall be measured in the ambient air as S02 by the 

reference method described in 40 CFR 50, Appendix A-1* or 40 CFR 50, Appendix A-2*, or by an equivalent 

method designated in accordance with 40 CFR 53*. To demonstrate attainment, the second-highest three 

(3) hour average must be based upon hourly data that are at least seventy-five percent (75%) complete in 

each calendar quarter. A three (3) hour block average shall be considered valid if: 

(i) all three (3) hourly averages for the three (3) hour period are available; or 

(ii) only one (1) or two (2) hourly averages are available, but the three (3) hour average would exceed the 

level of the standard when zeros are substituted for the missing values, subject to the rounding rule of this 

clause. 

In all cases, the three (3) hour block average shall be computed as the sum of the hourly averages divided 

by three (3). 

(C) S02 values may be converted to ppm using the conversion factor two thousand six hundred twenty 

(2,620) 1Jg/m3 = one (1) ppm. 

(2) Total suspended particulates (TSP) requirements are as follows: 

(A) For primary standards, the following values shall represent the maximum permissible ambient air quality 

levels: 

(i) Seventy-five (75) f.Jg/m3 annual geometric mean. 

(ii) Two hundred sixty (260) 1Jg/m3 maximum twenty-four (24) hour average concentration not to be 

exceeded more than one ( 1) day per year. 

(B) For secondary standards, the following value shall represent maximum permissible ambient air quality 

levels: one hundred fifty (150) 1Jg/m3 maximum twenty-four (24) hour average concentration not to be 

exceeded more than one (1) day per year. 

(3) Carbon monoxide (CO) requirements are as follows: 

(A) For primary and secondary standards, the following values shall represent the maximum permissible 

ambient air quality levels: 

(i) Ten (10) milligrams per cubic meter (mg/m3) (ten thousand (10,000) 1Jg/m3

) (nine (9) ppm) maximum 

eight (8) hour averajle concentration not to be exceeded more than once per year. 

(ii) Forty (40) mg/m (forty thousand (40,000) 1Jg/m3

) (thirty-five (35) ppm) maximum one (1) hour average 

concentration not to be exceeded more than once per year. 

(B) CO values may be converted to ppm using the conversion factor one thousand one hundred forty-five 

(1, 145) f.Jg/m3 = one (1) ppm. 

(4) Ozone (03

) requirements are as follows: 

(A) For the one (1) hour ozone standards, the level of the one (1) hour primary and secondary ambient air 

quality standards for ozone measured by a reference method based on 40 CFR 50, Appendix D* and 

desi~nated in accordance with 40 CFR 53* is twelve-hundredths (0.12) ppm (two hundred thirty-five (235) 

IJg/m ). The standard is attained when the expected number of days per calendar year with maximum hourly 

average concentrations above twelve-hundredths (0.12} ppm (two hundred thirty-five (235) f.Jg/m3) is equal 

to or less than one (1) as determined by 40 CFR 50, Appendix H*. 

(B) For the eight (8) hour ozone standards, the: 

(i) level of the eight (8) hour primary and secondary ambient air quality standards for ozone, measured by a 

reference method based on 40 CFR 50, Appendix D* and designated in accordance with 40 CFR 53*, is 

eight hundredths (0.08) seventy-five thousandths (0.075) ppm, daily maximum eight (8) hour average; 

and 

(ii) eight (8) hour primary and secondary ozone ambient air quality standards are met at an ambient air 

quality monitoring site when the average of the annual fourth highest daily maximum eight (8) hour average 

ozone concentration is less than or equal to eight hundredths (0.08) seventy-five thousandths (0.075) 

ppm as determined in accordance with 40 CFR 50, Appendix~ P*. 

(C) 0.3 values may be converted to ppm using the conversion factor one thousand nine hundred sixty-five 

(1 ,96o) 1Jg/m3 = 1.0 ppm. 

(5) Nitrogen dioxide (N02

) requirements are as follows: 

(A) For the primary one (1) hour ambient air quality standard, the maximum permissible ambient air quality 

level shall be one hundred (100) ppb, one (1) hour average concentration, measured in the ambient air as 

N02

. The one (1) hour standard is attained when the three (3) year average of the annual ninety-eighth 

Date: Aug 19,2014 10:09:02AM EDT DIN: 20130821-IR-326130358FDA Page 5 
Indiana Register 

percentile of the daily maximum one (1) hour average concentration is less than or equal to one hundred 

(100) ppb, as determined in accordance with 40 CFR 50, Appendix S*. 

(B) For the annual primary standard, the following value shall represent the maximum permissible ambient 

air quality level: one hundred (1 00) JJg/m3 (fifty-three thousandths (0.053) ppm) annual average 

concentration in a calendar year. The annual primary standard is attained when the annual average 

concentration in a calendar year is less than or equal to fifty-three (53) ppb, as determined in accordance 

with 40 CFR 50, Appendix S* for the annual standard. 

(C) For the annual secondary standard, the following value shall represent the maximum permissible 

ambient air quality level: one hundred (100) JJg/m3 (fifty-three thousandths (0.053) ppm) annual arithmetic 

mean concentration in a calendar year. The secondary standard is attained when the annual arithmetic 

mean concentration in a calendar year is less than or equal to fifty-three thousandths (0.053) ppm, rounded 

to three (3) decimal places (fractional parts equal to or greater than five ten-thousandths (0.0005) ppm must 

be rounded up). To demonstrate attainment, an annual mean must be based upon hourly data that are at 

least seventy-five percent (75%) complete or upon data derived from manual methods that are at least 

seventy-five percent (75%) complete for the scheduled sampling days in each calendar quarter. 

(D) N02 values may be converted to ppm using the conversion factor one thousand eight hundred eighty 

(1 ,880) JJg/m3 =one (1) ppm. 

(E) The levels of the standards shall be measured by: 

(i) a reference based on 40 CFR 50, Appendix F*; or 

(ii) an equivalent method designated in accordance with 40 CFR 53*. 

(6) Pb: For primary and secondary standards, the following value shall represent the maximum permissible 

ambient air quality level: fifteen-hundredths (0.15) JJg/m3, arithmetic mean concentration over a three (3) 

month period. The standards are attained when the maximum arithmetic three (3) month mean concentration 

for a three (3) year period is less than or equal to fifteenth-hundredths (0.15) JJg/m3

, as determined in 

accordance with 40 CFR 50, Appendix R* and measured in the ambient air as Pb by either: 

(A) a reference method based on 40 CFR 50, Appendix G*, and designated in accordance with 40 CFR 53*; 

or 

(B) an equivalent method designated in accordance with 40 CFR 53*. 

(7) PM1 : For primary and secondary standards, the maximum permissible ambient air quality level is one 

hundretffifty (150) JJg/m3 maximum twenty-four (24) hour average concentration. The standards are attained 

when the expected number of days per calendar year with a twenty-four (24) hour average concentration 

above one hundred fifty (150) JJg/m , as determined in accordance with 40 CFR 50, Appendix K,* is equal to or 

less than one (1 ). 

(8) PM 5 requirements are as follows: 

(A) For the primary and seeondary standards, annual standard, the following valHes value shall represent 

the maximum permissible ambient air quality levels: (/\) Fifteen (15) level: twelve (12) micrograms per 

cubic meter (JJg/m3

) annual arithmetic mean concentration. The standards are standard is attained when 

the annual arithmetic mean concentration is less than or equal to fifteen (15) twelve (12) JJg/m3

, as 

determined in accordance with 40 CFR 50, Appendix N*, as amended by 78 FR 3277, and measured in the 

ambient air as PM2 by either: 

(i) a reference met~od based on 40 CFR 50, Appendix L*, and designated in accordance with 40 CFR 53*; 

or 

(ii) an equivalent method designated in accordance with 40 CFR 53*. 

(B) For the secondary annual standard, the following value shall represent the maximum permissible 

ambient air quality level: fifteen (15) micrograms per cubic meter (1Jg/m3

) annual arithmetic mean 

concentration. The standard is attained when the annual arithmetic mean concentration is less than 

or equal to fifteen (15) 1Jg/m3

, as determined in accordance with 40 CFR 50, Appendix N*, as 

amended by 78 FR 3277, and measured in the ambient air as PM

2 5 by either: 

(i) a reference method based on 40 CFR 50, Appendix L*, and de"signated in accordance with 40 

CFR 53*; or 

(ii) an equivalent method designated in accordance with 40 CFR 53*. 

fB1 (C) For the primary and secondary 24-hour standard, the following value shall represent the 

maximum permissible ambient air quality level: thirty-five (35) JJg/m3 twenty-four (24) hour average 

concentration. The standards are attained when the ninety-eighth percentile twenty-four (24) hour 

concentration is less than or equal to thirty-five (35) micrograms per cubic meter (JJglm\ as determined in 

accordance with 40 CFR 50, Appendix N*, as amended by 78 FR 3277, and measured in the ambient air 

as PM2 by either: 

(i) a reference method based on 40 CFR 50, Appendix L*, and designated in accordance of 40 CFR 53*; or 

(ii) an equivalent method designated in accordance with 40 CFR 53*. 

Date: Aug 19,201410:09:02AM EDT DIN: 20130821-IR-326130358FDA Page 6 
Indiana Register 

*These documents are incorporated by reference. Copies may be obtained from the Government Printing 

Office, 732 North Capitol Street NW, Washington, D.C. 20401 or are available for review and copying at the 

Indiana Department of Environmental Management, Office of /\ir Quality, Legal Counsel, Indiana Government 

Center North, +eAtR Thirteenth Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204. 

(Air Pollution Control Division; 3261AC 1-3-4; filed Mar 10, 1988, 1:20 p.m.: 111R 2378; filed Apr 13, 1988, 3:35 

p.m.: 111R 3020; readopted filed Jan 10, 2001, 3:20p.m.: 241R 1477; filed May 21, 2002, 10:20 a.m.: 251R 

3055; filed Mar 9, 2004, 3:45p.m.: 27 IR 2224; filed Dec 20, 2004, 2:15p.m.: 281R 1471; filed Mar 6, 2006, 3:00 

p.m.: 291R 2179; filed Sep 24, 2010, 1:44 p.m.: 20101020-IR-326100127FRA; filed Feb 9, 2011, 10:29 a.m.: 

20110309-IR-326100495FRA; filed Dec 19, 2012, 4:22p.m.: 20130116-IR-326120510FRA) 

Notice of Public Hearing 

Posted: 08/21/2013 by Legislative Services Agency 

An html version of this document. 

Date: Aug 19,2014 10:09:02AM EDT DIN: 20130821-IR-326130358FDA Page 7 

Indiana Register 

TITLE 326 AIR POLLUTION CONTROL DIVISION 

Notice of Public Hearing 

Notice of Public Hearing 

LSA Document #13-358 

Under IC 4-22-2-24. IC 13-14-B-6. and IC 13-14-9. notice is hereby given that on February 12, 2014, at 1:30 

p.m., at the Indiana Government Center South, 302 West Washington Street, Conference Center Room A, 

Indianapolis, Indiana, the Environmental Rules Board will hold a public hearing on amendments to 3261AC 1-3-4 

concerning national ambient air quality standards for ozone and particulate matter. 

The purpose of this hearing is to receive comments from the public prior to final adoption of these rules by 

the board. All interested persons are invited and will be given reasonable opportunity to express their views 

concerning the proposed amendments. Oral statements will be heard, but, for the accuracy of the record, all 

comments should be submitted in writing. 

Additional information regarding this action may be obtained from Zachary Ruzycki, Rule Development 

Branch, Office of Legal Counsel, (317) 232-B229 or (BOO) 451-6027 (in Indiana). 

Individuals requiring reasonable accommodations for participation in this event should contact the Indiana 

Department of Environmental Management, Americans with Disabilities Act coordinator at: 

Attn: ADA Coordinator 

Indiana Department of Environmental Management 

Indiana Government Center North 

100 North Senate A venue 

Indianapolis, IN 46204-2251 

or call (317) 233-17B5 (V). Speech and hearing impaired callers may contact IDEM via the Indiana Relay Service 

(711) or (BOO) 7 43-3333. Please provide a minimum of 72 hours notification. 

Copies of these rules are now on file at the Rule Development Branch, Office of Legal Counsel, Indiana 

Department of Environmental Management, Indiana Government Center North, 100 North Senate Avenue, 

Thirteenth Floor and Legislative Services Agency, Indiana Government Center North, 100 North Senate Avenue, 

Room N201, Indianapolis, Indiana and are open for public inspection. 

Nancy King, Chief 

Rule Development Branch 

Office of Legal Counsel 

Posted: OB/21/2013 by Legislative Services Agency 

An html version of this document. 

Date: Aug 19,201410:11:15AM EDT DIN: 20130821-IR-326130358PHA Page 1 

INDIANA DEPARTMENT OF ENVIRONMENTAL MANAGEMENT 

We Protect Hoosiers and Our Environment. 

100 N. Senate Avenue • Indianapolis, IN 46204 

(800) 451-6027 • (317) 232-8603 • www.idem.IN.gov 

Michael R. Pence 

Govemor 

Thomas W. Easterly 

Commissioner 

March 17, 2014 

CERTIFICATE OF PUBLICATION 

This is to certify that the Indiana Department of Environmental Management (IDEM) Legal 

Notice is providing an opportunity for a public hearing regarding: 

411 Revisions to Ozone and PM2.s Standards, LSA #13-358 

411 Updates to References to the Code of Federal Regulations, 2013 CFR Update, LSA #13-

501 

were published on IDEM's web site on or before March 19,2014. It will remain posted on the 

site until at least April21, 2014. . · 

The notice in full may be found at the following web address, under the "Statewide" category. 

http://www.in.gov/idem/6777.htm 

Web publication of the notice was at the request of Christine Pedersen, Section Chie.f, Rule 

Development Section, Office of Legal Counsel, IDEM. 

Attachments: 

Copy of web page as published. 

By: 

Mike Finkelstein 

IDEM Webmaster 

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LEGAL NOTICE 

Revisions to Ozone and PM2.s Standards arid 

Updates to References to the Code of Federal Regulations 

Notice is hereby given under 40 CFR 51.102 that the Indiana Depmiment of 

Environmental Management (IDEM) is providing an oppotiunity for a public hearing regarding 

revisions to: a rule concerning the national ambient air quality standards for the 2008 8-hour 

ozone standard, and the 2012 annual particulate matter with an aerodynamic diameter less than 

or equal to 2.5 micrometers (PM2.s) standard at 326 lAC 1-3-4; and a rule concerning an update 

to 326 lAC 1-1-3 to revise the reference to the Code of Federal Regulations (CFR) to mean the 

July 1, 2013, edition, to 326 lAC 11-6 to remove obsolete language,.-and to 326 lAC 20-95-1 to 

update a reference to the CFR. All interested persons are invited and will be given a reasonable 

oppmiunity to express their views concerning the proposed rules. 

Copies of the proposed air program rules are also available to any person upon request, 

may be viewed online via the Internet from local libraries, and are available for public inspection 

at the following locations: 

Indiana Department of Environmental Management, Office of Legal Counsel, Indiana 

Government Center-North, 100 Nmth Senate Avenue, 13th Floor, Indianapolis< Indiana 46204. 

Indiana Department of Environmental Management, Nmthwest Office, 330 West US 

Highway 30, Suites E and F, Valparaiso, IN 46385. 

Indiana Depmtment of Environmental Management, Northern Office, Suite 450, 300 N. 

Michigan Street, South Bend, Indiana 46601. 

Indiana Department of Environmental Management, Southwest Office, 1120 North 

Vincennes Avenue, P~O. Box 128, Petersburg, Indiana 47567-0128. 

Indiana Department of Environmental Management, Southeast Office, 820 West Sweet 

Street, Brownstown, Indiana 47220-9557. · 

Legislative Services Agency, Indiana Government Center-Nmth, 100 North Senate 

Avenue, Room N201, Indianapolis, Indiana 46204. 

The following air program rules are noticed for the public hearing: 

Ozone and PM2.5 Standards (LSA # 13-358). The purpose of this hearing is to receive public 

comment on amendments ·to 326 lAC 1-3-4 concerning the national ambient air quality standards 

for the 2008 8-hour ozone standard, and the 2012 annual particulate matter with an aerodynamic 

diameter less than or equal to 2.5 micrometers (PM2.5) standard. This rule will be submitted to 

the United States Environmental Protection Agency as a revision to the State Implementation 

Plan required by the Clean Air Act. A copy ofthe most recently published version of this rule is 

available at: http://www.in.gov/idem/5679.htm. · 

2013 CFR Update (LSA # 13-501). The purpose of this hearing is to receive public comment 

on amendments to 326 lAC 1-1-3 concerning an update to references to the CFR to mean the 

July 1, 2013, edition, to 326 lAC 11-6 to remove obsolete language, and to 326 lAC 20-95-1 to 

update a reference to the CFR. This rule will be submitted to the United States Environmental 

Protection Agency as a revision to the State Implementation Plan required by the Clean Air Act. 
A copy of the most recently published vers!on of this rule is available at: 

http://www.in.gov/idem/5679.htm. 

Requests for a public hearing must be submitted on or before April21, 2014. If no 

timely request for a public hearing is received a hearing will not be held. Interested pmiies can 

contact Christine Pedersen at the contact information listed below to see if a hearing has been 

scheduled. If a hearing is scheduled another legal notice will be published stating the date, time, 

and location of the meeting. · 

For additional information contact Christine Pedersen, at the Indiana Depmiment of 

Environmental Management, Rules Development Branch, Mail Code 60-01, Office of Legal 

Counsel, Indiana Govermnent Center Nmih, 100 Nmih Senate Avenue, Indianapolis, Indiana, 

46204, e-mail at cpederse@idem.in.gov, or call (317) 233-5684 or (800) 451-6027 ext. 3-5684 

(in Indiana). 
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BEFORE THE STATE OF INDIANA 

ENVIRONMENTAL RULES BOARD 

PUBLIC MEETING OF APRIL 9, 2014 

OR1GiNAL 

PROCEEDINGS 

before the Indiana Environmental Rules Board, 

Beverly Gard, Chairman, taken before me, Lindy L. 

Meyer, Jr., a Notary Public in and for the State 

of Indiana, County of Shelby, at the Indiana 

Government Center South, Conference Center, 

Room A, 402 West Washington Street, Indianapolis, 

Indiana, on Wednesday, April 9, 2014 at 1:31 

o'clock p.m. 

William F. Daniels, RPR/CP CM d/b/a 

ACCURATE REPORTING OF INDIANA 

12922 Brighton Avenue 

Carmel, Indiana 46032 

(317) 848-0088 

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APPEARANCES: 

BOARD MEMBERS: 

Beverly Gard 1 Chairman 

Thomas R. Anderson 

Gary Powdrill 

Dr. Ted N.iemiec 

Joanne Alexandrovich 

Kelly Carmichael 

Ken Rulon 

Chris Horn 

Gail Boydston 

Calvin Davidson 

Mike Mettler 1 Proxy 1 Department of 

Health 

Pamela Fisher 1 Proxy 1 Indiana Economic 

Development Corporat~on 

David Bausman/ Proxy 1 Lieutenant 

Governor 

Thomas W. Easterly (n6nvoting) 

IDEM STAFF MEMBERS: 

Keith Baugues 

Chris Pedersen 

Susan Bern 

MaryAnn Stevens 

Bruno Pigott 

Paul Dubenetzky 

Martha Clark Mettler 

.Nancy King 

Betsy Rouse 

Janet Pittman 

ON BEHALF OF THE EPA: 

Susan Hedman 1 Region V Regional Administrator 

PUBLIC SPEAKERS: 

Jennifer Thompson 

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CHAIRMAN GARD: 

1:31 o'clock p.m. 

April 9, 2014 

I'm Beverly Gard, the 

3 

Chair of the Environmental Rules Board, and I 

call the meeting to order. It appears that a 

quorum is present. I'm going start with the 

Commissioner and go around the room, and then I 

have a special introduction. 

COMM. EASTERLY: So, I'm Tom 

Easterly, the Commissioner of the Indiana 

Department of Environmental Management. 

MR. BAUSMAN:. David Bausman, Director 

of Policy, Indiana State Department of Ag, proxy 

for the Lieutenant Governor. 

MR. METTLER: Mike Mettler, the proxy 

for the State Health Commissioner, Dr. VanNess. 

M,S. FISHER: Pam Fisher, proxy for 

Secretary of Commerce Victor Smith. 

MS. BOYDSTON: Gail Boydston, 

representing manufacturing. 

CHAIRt"lAN GARD: Beverly Gard, general 

public. 

MR. POWDRILL: Gary Powdrill, 
24 

0 

1 CFR Update, and Utility NESHAP, if that's the way 

2 we pronounce it, the acronym. There will also be 

3 a public hearing prior to consideration for 

4 preliminary. adoption of Exceptional Use waters. 

5 The rules being considered at today's 

6 meeting were included in the Board packets and 

7 are available for public inspection at the Office 

8 of Legal Counsel, 13th floor, Indiana Government 

9 Center North, Monday through Friday between the 

10 hours of 8:45 a.m. and 4:45p.m. 

11 A written trans~ript of today's meeting 

0 12 will be made. The transcript and any written 

. . 

13 submission will be open for public inspection at 

14 the Office of Legal Counsel. Copies may be made 

15 for the cost of copying. 

16 Will the official reporter for the cause 

17 please stand, raise your right hand and state 

18 your name? 

19 (Reporter sworn.) 

20 CHAIRMAN GARD: Thank you. 

21 Now we'll move to public hearing for final 

22 adoption of Ozone and PM2 _5 Standards. I will now 

23 introduce Exhibit A, the draft rules. Is there 

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1 someone from the Department to present the rule? 

2 Chris. 

3 MS. PEDERSEN: This rule proposes the 

4 adoption of the recently revised Ozone and Fine 

5 Particulate, or PM2 . 5 , Stan~ards, for consistency 

6 with federal regulations. U.S. EPA issued 

7 revised primary and seco?dary standards for ozone 

8 on March 27th, 2008. Those .standards were 

9 lowered from an eight-hour average of 0.08 parts 

10 per million to 0.075 parts per million. 

11 On January 15th, 2013, U.S. EPA published 

( 12 a revised primary annual PM2 .s standard. The 

13 primary annual PM2 • 5 standard was lowered from 15 

14 to 12 micrograms per cubic meter. The secondary 

15 standard and the 24-hour PM2 . 5 standard were 

16 retained at their previous levels. It also 

17 revised the form of the primary and secondary 

18 annual PM2 . 5 standards. 

19 A minor administrative update to an 

20 internal agency has also been made in this rule. 

21 This rulemaking amends 326 IAC 1-3-4 tp 

22 include the most recent Ozone and PM2 . 5 Standards 

23 to ensure cons.istency with federal regulations. 

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1 IDEM.recommends that the Board adopt the 

2 rule. 

3 CHAIRMAN GARD: Any questions for 

4 Chris? 

5 (No response.) 

6 CHAIRMAN GARD: There are no speaker 

7 cards turned in. Is there anyone that would like 

8 to speak on the issue? 

9 (No response.) 

10 CHAIRMAN GARD:· Seeing none 1 the 

11 hearing is concluded. The Board will now 

12 consider final adoption of the ozone and PM2 . 5 

13 Standards. Is there any discussion from the 

14 Board? 

15 (No response.) 

16 CHAIRMAN GARD: Okay. Is there a 

17 motion for final adoption of the rule as 

18 presented? 

19 MR. BAUSMAN: So moved. 

20 CI{AIRMAN GARD: Is there a second? 

21 MR. HORN: Second the motion. 

22 CHAIRMAN GARD: Okay. I'll call the 

23 roll 1 and hopefully everybody's on it this time. 
27 

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1 (Laughter.) 

2 CHAIRMAN GARD: Mr. Rulon? 

3 MR. RULON: Yes. 

4 CHAIRMAN GARD: Mr. Carmi·chael? 

5 MR. CARMICHAEL: Dr. Alexandrovich? 

6 MS. ALEXANDROVICH: Yes. 

7 CHAIRMAN GARD: Dr. Niemiec? 

8 DR. NIEMIEC: Yes. 

9 CHAIRMAN GARD: Mr. Powdrill? 

10 MR .. POWDRILL: Yes. 

11 CHAIRMAN GARD: Mr. Anderson? 

( 12 MR. ANDERSON: Yes. 

13 CHAIRMAN GARD: Mr. Etzler? He's not 

14 here. 

15 Ms. Boydston? 

16 MS. BOYDSTON: Yes. 

17 CHAIRMAN GARD: Mr. Davidson? 

18 MR. DAVIDSON: Yes. 

19 CHAIRMAN GARD: Mr. Horn? 

20 MR. HORN: Yes. 

21 CHAIRMAN GARD: Ms. Fisher? 

' 22 MS. FISHER: Yes. 

23 CHAIRMAN GARD: Mr. Mettler? 

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1 MR. METTLER: Yes. 

2 CHAIRMAN GARD: Mr. Bausman? 

3 MR. BAUSMAN: Yes. 

4 CHAIRMAN GARD: Mr; Smith? 

5 MR. POWDRILL: Not here. 

6 CHAIRMAN GARD: Not here. And the 

7 Chairman votes aye. Thirteen ayes and zero nays 1 

8 so the motion has passed·. 

9 This will be a public hearing before the 

10 Environmental Rules Board concerning final 

11 adoption of amendments to rules at 326 IAC 1 1 

12 326 IAC 11 and 326 IAC 20 1 updating references to 

13 the Code of Federal Regulations for CFR in the 

14 rules. I will now introduce Exhibit B 1 the draft 

15 rules 1 into the record for the hearing. 

16 And again/ Chris is going to present the 

17 rule. 

18 MS. PEDERSEN: This rule has about 

19 three primary functions I wanted to discuss 

20 briefly. The first purpose of this rule is to 

21 update the reference to the Code of Federal 

22 Regulations, or CFR 1 in 326 lAC 1-1-3 1 to the 

23 July lst 1 i013 edition. 
70 

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1 CERTIFICATE 

2 I, Lindy L. Meyer, Jr., the undersigned 

3 Court Reporter and Notary Public residing in the 

4 City of Shelbyville,_.Shelby County, Indiana, do 

5 hereby certify that the foregoing is a true and 

6 correct transcript of the proceedings taken by me 

7 on Wednesday, April 9, 2014 in this matter and 

8 transcribed by me. 

9 

10 

11 Lindy L. Meyer, Jr., 

( 12 Notary Public in and 

13 for the State of Indiana. 

14 

15 My Commission expires October 27, 2016. 

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Bold =new language 

Stdkeout = existing language deleted in this rulemaking 

TITLE 326 AIR POLLUTION CONTROL DIVISION 

DRAFTRULE . 

LSADocument #13-358 

.DIGEST 

Amends 326 lAC 1-3-4 concer:rllng the national ambient air quality standards for the 2008 

8-hour ozone standard, and the 2012·-afu:i.ual particulate matter with an aerodynamic diameter less 

than or equal to 2.5 micrometers (PM25) standard. Effective 30·days after filing with-the 

Publisher. 

IDSTORY 

Findings and Determination of the Commissioner Pursuant to IC 13-14-9-8: August 21, 

2013, Indiana Register (DIN: 20130821-IR-326130358FDA). · 

Notice ofHearing:· August21, 2013, Indiana Register (DIN: 20130821-IR326130358PHA). 

Change in Notice of Public Hearing: November 20, 2013, Indiana Register (DIN: 

20131120-IR-326130358CHA). 

Change in Notice ofPublicHearing: January 29,2014, IndianaR~gister (DIN: 

20140129-IR-326130358CHA). 

Date ofHearing: April9, 2014. 

326 lAC 1-3-4 

DRAFT RULE 

. . 

SECTION 1. 326 lAC 1-3-4 IS AMENDED TO READ AS FOLLOWS: 

326 lAC 1-3-4 Ambient air quality standards 

Authority: IC 13-14-8; IC 13-17-3-4; IC 13-17-3-11 

Mfected: IC13-15; IC 13-17 

Sec. 4. (a) All measurements of air quality that are expressed as mass per unit volume, 

other than fot: the particulate matter (PM25) standards contained in subsection (b )(8) and lead 

(Pb) standards contained in subsection (b)( 6), shall be corrected to a reference temperature of 

twenty-five (25) degrees Celsius and a reference pressure of seven hundred sixty (760) 

millimeters of mercury (one thousand thirteen and two-tenths (1,013.2) millibars), as micrograms 

per cubic meter (J..Lg/m3

). Measurements ofPM2'5 , for purposes of comparison to the standards 

contained in subsection (b )(8), and Pb, for purposes of comparison to the standard~ contained in 

subsection (b)( 6), shall be reported based on actual ambient air volume measured at the actual 

Page 1 of 5 
ambient temperature and pressure at the monitoring site during the measurement period. 

(b) Ambient air quality standards are as follows: 

(1) Sulfur oxides as sulfur dioxide (S02) requirements are as follows: 

(A) For the primary one (1) hour ambient air quality standard, the maximum 

permissible ambient air quality level shall be seventy-five (75) palis per billion 

(ppb ). Tl;le one (1) hour standard is attained when the three. (3) year average of the 

annual ninety-ninth percentile of the daily maximum one (1) hour average 

concentration is less than or equal to seventy-five (75) ppb, as determined in 

accordance with 40 CFR 50, Appendix T* and measured in the ambient air as S02 

by a reference method based on 40 CFR 50, Appendix A-1 *or 40 CFR 50, 

Appendix A-2*, or an equivalent method designated in accordance with 40 CFR 

53*. 

(B) For the secondary standard, the following value shall represent the maximum 

permissible ambient air quality level: one thousand. three hundred (1,300) f..Lg/m3 

(five-tenths (0.5) ppm) maximum th;ree (3) hour concentration not to be exceeded 

more than once per year. The three (3) hour averages shall be determined from 

successive nonoverlapping three (3) hour blocks starting at midnight each 

calendar day and shall be rounded to one (1) decimal place (fractional parts equal 

to or ·greater than five-hundredths (0.05) ppm sh.all be rounded up). Sulfur oxides 

shall be measured in the ambient air as so2 by the reference method described in 

40 CFR 50, Appendix A-1 * or 40 CFR 50, Appendix A-2*, or by an equivalent 

method designated in accordance withAO CFR 53*. To demonstrate attainment, 

the second-highest three (3) hour average must be based upon hourly data that are 

at least seventy-five percent (75%) complete in each calendar qualier. A three (3) 

hour block average shall be considered valid if: 

(i) all three (3)' hourly averages for the three (3) hour period are available; 

or 

(ii) only one (1) or two (2) hourly averages are available, but the three (3) 

hour average would exceed the level of the standard when zeros are 

substituted for the missing values, subject to the rounding mle of this 

clause. · 

In all cases, the three (3) hour block average shall be computed as the sum of the 

hourly averages divided by three (3). · 

(C) S02 values may be converted to ppm using the conversion factor two 

thousand six hundred twenty (2,620) ).Lg/m3 = one (1) ppm. 

(2) Total suspended paliiculates (TSP) requirements are as follows: 

(A) For primary standards, the following values shall represent the maximum 

permissible ambient air quality levels:. 

(i) Seventy-five (75) ).Lg/m3 annual geometric mean. . 

(ii) Two hundred sixty (260) ).Lg/m3 maximum twenty-four (24) hour 

a:verage concentration not to be exceeded more than one (1) day per year. 

(B) For secondary standards, the following value shall represent maximum 

Page 2 of 5 
permissible ambient air quality levels: one hundred fifty (150) !lg/m3 maximum 

twenty-four (24) hour average concentration not to be exceeded more than one (1) 

day per year. 

(3) Carbon monoxide (CO) requirements are as follows: 

(A) For primary and secondary standards, the following values shall represent the 

maximum permissible ambient air quality levels: 

(i) Ten (1 0) milligrams per cubic meter (mg/m3

) (ten thousand (1 0,000) 

~g/m ) (nine (9) ppm) maximum eight (8) hour average concentration not 

to be exceeded more than once per year. 

(ii) Forty (40) mg/m3 (forty thousand (40,000) !lg/m3

) (thirty-five (35) 

ppm) maximum one (1) hour average concentration not to be exceeded 

more than once per year. 

(B) CO values may be converted to ppm using the conversion factor one thousand 

one hundred forty-five (1,145) !lg/m3 = one (1) ppm; 

(4) Ozone (03) requirements are as follows: 

(A) For the one (1) hour ozone standards, the level of the one (1) hour primaty 

and secondmy ambient air quality standards for ozone measured by a reference 

method based on 40 CFR 50, Appendix D* and designated in accordance with 40 

CFR 53* is twelve-hundredths .(0.12) ppm (two hundred thirty-five (235) !lg/m3

). 

The standard is attained when the expected number of days per calendar year with 

· maximum hourly average concentrations above twelve-hundredths (0.12) ppm 

(two hundred thirty-five (235) !lg/m3

) is equal to or less than ~ne (1) as 

determined by 40 .CFR 50, Appendix H*. · 

(B) For the eight (8) hour ozone standards, the: 

(i) level of the eight (8) hour primary and seconqmy ambient air quality 

standards for ozone, measured by a reference metho<;l based on 40 CFR 50, 

Appendix D* and designated in accordance with 40 CFR 53*, is eigl'rrhundtedths (fT.OOJ seventy-five thousandths (0.075) ppm, daily maximum 

eight (8) :P.our average; and 

(ii) eight (8) hour primary and secondary ozone ambient air. quality 

standards are met at an ambient air quality monitori~g site when the 

average of the annual fourth highest daily maximum eight (8) hour average 

ozone concentration is less than or equal to eight-htmd:redths @:B-8] 

seventy-five thousandths (0.075) ppm as determined in accordance with 

40 CFR 50, Appendix 1*-:-.P*. 

(C) 0 3 values may be converted to ppm using the conversion factor one thousand. 

nine hundred sixty-five (1,965) !lg/m3 = 1.0 ppm. 

(5) Nitrogen dioxide (N02) requirements are as follows: . 

(A) For the primary one (1) hour ambient air quality standard, the maximum 

permissible ambient air quality level shall be one hundred (100) ppb, one (1) hour 

average concentration, measured in the ambient air as N02 . The one (1) hour 

standard is attained when the three (3) year average of the annual ninety-eighth 

percentile of the daily maximuriJ. one (1) hour average concentration is less than or 

Page 3 of 5 
equal to one hundred (100) ppb, as determined in· accordance with 40 CPR 50, 

Appendix S*. 

(B) For the annual primruy standard, the following value shall represent the 

maximum permissible ambient air quality level: one hundred (1 00) 1-1g/m3 (fiftythree thous~ndths (0.053) ppm) annual average concentration in a calendaJ.' year. 

The annual primary standaJ.'d is attained when the annual average concentration in 

a calendaJ.' year is less than or equal to fifty-three (53) ppb, as determined in 

· accordance with 40 CPR 50, Appendix S* for the annual standaJ.'d. 

(C) For the annual secondruy standaJ.'d, the following value shall represent the 

maximum permissible ambient air quality level: one hundred (100) 1-1g/m3 (fiftythree thousandths (0.053) ppm) annual arithmetic mean concentration in a 

calendaJ.' year. The secondruy standaJ.'d is attained when the annual arithmetic 

mean concentration in a calendru· year is less than or equal to fifty-three 

thousandths (0.053) ppm, rounded to three (3) decimal places (fractional parts 

equal to or greater than five ten-thousan~ths (0.0005) ppm must be rounded up). 

To demonstrate attainment, an annual mean must be based upon hourly data that 

are at least seventy-five percent (75%) complete or upon data derived from 

manual methods that are ~t least seventy-five percent (75%) complete for the. 

scheduled sampling days in each calendar qmuier. 

(D) N02 values may be converted to ppm using the conversion factor one 

thousand.eight hundred eighty (1,880) 1-1g/m3 = one (1) ppm. · 

(E) The levels of the standards shall be measured by: 

(i) a reference based on 40 CFR 50, Appendix F*; or 

(ii) an equivalE?nt method designated in accordance with 40 CPR 53*. 

(6) Pb: Pot primary and secondruy standards, the following value shall represent the 

maximum permissible ambient air quality level: fifteen-hundredths (0.15) 1-1g/m3

, 

aritbn:+etic mean concentration over a three (3) month period. The standru·ds are attained 

when the maximum arithmetic three (3) month mean concentration for a three (3) year 

period is less than or equal to fifteenth-hundredths (0.15) 1-1g/m3

, as determined in 

accordance with 40 CPR 50, Appendix R* and measured iri the ambient air as Pb by 

either: 

(A) a reference method based on 40 CPR 50, Appendix G*, and designated in 

accordance with 40 CFR 53*; or 

(B) an equivalent method designated in accordance with 40 CPR 53*. 

(7) PM10: For primary and secondary standaJ.'ds, the maximum permissible ambient air 

quality level is one hundred fifty (150) 1-1g/m3 maximum twenty-four (24) hour average 

concentration. The standaJ.'ds are attained when the expected number of days per calendar 

year with a twenty-four (24) hour average concentration above one hundred fifty (150) 

1-1g/m3

, as determined in accordance with 40 CPR 50, Appendix K, * is equal to or less 

than one (1). 

(8) PM25 requirements are as follows: 

(A) For the primruy and secondary standards, annual standard, the following 

'VCl:"1:ttes value shall represent the maximum permissible ambient air quality levels. 

Page 4 of 5 
{:A} Fifteen (15) level: twelve (12) micrograms per cubic meter (j..Lg/m3

) annual 

arithmetic mean concentration. The standards are standard is attained when the 

annual arithmetic mean concentration is less than or equal to fifteen (15) twelve 

(12) !lg/m3

, as determined in accordance with 40 CFR 50, Appendix N*, as 

amended by 78 FR 3277, and measured in the ambient air as PM25 by either: 

(i) a reference method based on 40 CFR 50, Appendix L *, and designated 

in accordance with 40 CFR 53*; or 

(ii) an equivalent method designated_ in accordance with 40 CFR 53*. 

(B) For the secondary annual standard, the following value shall represent 

the maximum permissible ambient air quality level: fifteen (15) micrograms 

per cubic meter (!lg/m3

) annual arithmetic mean concentration. The standard 

is attained when the annual arithmetic mean concentration is less than or 

equal to fifteen (15) 11g/m\ as determined in accordance with 40 CFR 50, 

Appendix N*, as amended by 78 FR 3277, and measured in the ambient air 

as PM2:

5 by either: · · 

(i) a reference methodbased on 40 CFR 50, Appendix L*, and 

designated in accordance with 40 CFR 53*; or 

(ii) an equivalent method designated in accordance with 40 CFR 53*. 

{B)' (C) For the primary and secondary 24-hour standard, the following value 

shall represent the maximum permissible ambient air quality level: thirty-five 

(35) !lg/m3 twenty-four (24) hour average concentration. The standards are 

attained when the ninety-eighth percentile twenty-four (24) hour concentration is 

less than or equal to thirty-five (35) micrograms per cubic meter (j..Lg/m3

), as 

determined in accordance with 40 CFR 50, Appendix N*, as amended by 78 FR 

3277, and measured in the ambient air as PM2.

5 by either: 

(i) a reference method based on 40 CFR 50, Appendix L *, and designated 

in accordance of 40 CFR 53*; or 

(ii) an equivalent method designated in accordance with 40 CFR 53* . 

. *These documents are incorporated by reference. Copies may be obtained from the 

Government Printing Office, 732 Nmih Capitol Street NW, Washington, D.C. 20401 or are 

available for review and copying at the Indiana Depmiment of Environmental Management, 

Office of Air Quality-, Legal Counsel, Indiana Government Center North, Tenth Thirteenth 

Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204. (Air Pollution Control Division; 

326IAC 1-3-4;filedMar 10, 1988, 1:20 p.m.: 11 IR 2378;filedApr 13, 1988, 3:35 p,m.: 11 IR 

3020; readopted filed Jan 10, 2001, 3:20p.m.: 24 IR 1477;filedMay 21, 2002,10:20 a.m.: 25 

IR 3055;filedMar 9, 2004, 3:45p.m.: 27 IR.2224;filedDec 20, 2004, 2:i5 p.m.: 28 IR 1471; 

filed Mar 6, 2006, 3:00p.m.: 29 IR 2179;filed Sep 24, 2010, 1:44 p.m.: 20101020-IR326100127FRA;filedFeb 9, 2011, 10:29 a.m.: 20110309-IR-326100495FRA;filedDec 19, 

2012, 4:22p.m.: 20130116-IR-326120510FRA) 

Page 5 of 5