1 o: {) PlU~ 8 .. 

LAJ 4. /itt~.. r~t1 ; 9tftl. / /l~lJC'-1 {L 

Brian Schweitzer, Governor 

Richard H. Opper, Director 

P.O. Box 200901 • Helena, MT 59620-0901 • (406) 444-2544 • www.deq.mt.gov 

James B. Martin 

Regional Administrator 

USEPA, Region 8 

1595 Wynkoop Street 

Denver, Colorado 80202-1129 

:Ji""' Dear~: 

December 19, 2011 

On October 15, 2008, EPA revised the primary National Ambient Air Quality Standards 

(NAAQS) for lead (Pb). In accordance with the applicable requirements of 42 USC §7410(a)(1), 

within three years after promulgation of a new or revised NAAQS, each state shall adopt and 

submit to EPA a plan that provides for implementation, maintenance, and enforcement of such 

primary NAAQS in each air quality control region (or portion thereof) within the state. 

On behalf of Governor Brian Schweitzer and pursuant to EPA's October 14, 2011 , Pb 

Infrastructure State Implementation Plan (SIP) guidance, I hereby certify that the existing 

Montana SIP is adequate for this purpose. For your reference, this submission includes an 

attachment providing an adequacy demonstration of Montana's compliance with the SIP 

infrastructure elements set forth at 42 USC §7 41 O(a)(2). Pursuant to EPA's October 14, 2011 , 

guidance, the information contained in the attachment was noticed for a 30-day public comment 

period ending on December 12, 2011 . No comments were received. 

If you have any questions regarding this action, please contact M. Eric Merchant, the 

Department's Air Quality Policy and Planning Supervisor, by telephone at (406) 444-1457 or by 

email at emerchant@mt.gov. 

Enclosure 

Richard H. Opper 

Director 

c: Brian Schweitzer, Governor, State of Montana 

RECEIVED 

U.S. EPA Region 8 

RA'sOff!Ce 

I 

DEC 2 7. 2011 

Carl Daly, Director, Air Program, Office of Partnership and Regulatory Assistance, 

USEPA Region 8 

Monica Morales, Chief, Air Quality Planning Unit, Air Program, Office of Partnership and 

Regulatory Assistance, USEPA Region 8 

Enforcement Division • Permitting & Compliance Division • Planning, Prevention & Assistance Division • Remediation Division 
PUBLIC NOTICE 

Montana 11 O(a)(2) SIP Requirements for Lead 

1) The Department of Environmental Quality invites public comment on the proposed 

certification of the adequacy of the Montana State Implementation Plan (SIP) for attaining and 

maintaining the revised National Ambient Air Quality Standards (NAAQS) for lead. 

2) The Clean Air Act (CAA) requires the US Environmental Protection Agency (EPA) to set 

NAAQS for six criteria pollutants; lead is one of these. Under the CAA, each state must develop 

a plan describing how it will attain and maintain the NAAQS, in other words, how it plans to 

clean up polluted areas and keep them clean. This plan is called the SIP and is required under 

Section 110 of the CAA. The lead certification document outlines how the Montana SIP 

provisions, programs, and other efforts meet the "infrastructure" elements of CAA Section 

11 O(a)(2). This certification is not intended to modify or amend any portion or provision of 

Montana's SIP. The certification simply outlines the requirements of section 110(a)(2)(A) 

through (M) of the CAA and addresses how Montana will implement, maintain and enforce the 

20081ead NAAQS. 

3) Any person may request a public hearing on this matter. If the Department receives a 

request for public hearing, a public hearing on this matter will be scheduled and the time for that 

hearing will be announced and another 30-day time period for submitting comment will begin. 

4) Interested persons may view the certification on the Department's website at: 

http://deq.mt.gov/pubcom.mcpx or may call the Department at 406-444-7305 to have copies 

made available for their inspection. 

5) The State of Montana makes reasonable accommodations for any known disability that may 

interfere with a person's ability to participate in state government proceedings. Persons 

needing accommodation must contact Oline Barta to advise of the nature of the accommodation 

needed. Please contact Ms. Barta at P.O. Box 200901 , Helena, Montana 59620-0901 ; phone 

(406) 444-0524; fax (406) 444-1499; or email "obarta@mt.gov." 

6) Interested parties may submit their comments concerning the proposal described above in 

writing to the Department by 

• addressing them to Oline Barta, 1520 E. Sixth Avenue, P.O. Box 200901 , Helena, 

Montana, 59620-0901; 

• faxing them to (406) 444-1499; or 

• sending them via email addressed to "obarta@mt.gov." 

To be guaranteed consideration, written comments must be postmarked on or before 5 p.m. 

December 12, 2011 . 
State of Montana 

11 O(a)(2) SIP Requirements for Lead 

Executive Summary 

A State Implementation Plan (SIP) identifies how the state will attain and maintain the primary and 

secondary National Ambient Air Quality Standards (NAAQS). The SIP contains regulations, sourcespecific requirements, non-regulatory items such as plans and inventories, and in some cases additional 

requirements promulgated by the US Environmental Protection Agency (EPA). The initial SIPs for states 

were approved by EPA on May 31, 1972. A state may revise its SIP with EPA approval as necessary. 

The federally enforceable SIP for Montana is compiled in 40 CFR Part 52 Subpart BB. Pursuant to the 

requirements of the Federal Clean Air Act (CAA), Montana declares that its SIP meets the requirements 

of42 USC 7410(a)(1)(D)(i). 

Relative to the 2008 lead NAAQS, Montana has no lead nonattainment areas (NAA) and no specific NAA 

control plans with respect to lead. On November 8, 2011, EPA issued final designations providing that all 

areas (Counties) in Montana are attainment or unclassifiable for the 2008 revised lead NAAQS. The 

enclosed SIP table outlines the requirements of section 11 O(a)(2)(A) through (M) of the CAA and 

addresses how Montana will implement, maintain and enforce the 2008 lead NAAQS. Note: East Helena, 

Montana is a NAA for the former 1978 lead NAAQS because it was the site of the now-defunct ASARCO 

primary lead smelter. ASARCO ceased its operations in April 2001 , and all production units and stacks 

have been razed and dismantled. No production units or stacks emit any air pollutants, or have the 

potential to do so. The ASARCO air quality permit was revoked on January 5, 2010. 

State authority for Montana's air quality program is codified in Chapter 2- Clean Air Act of Montana (or 

MT CAA), in Title 75 (Environmental Protection) of the Montana Code Annotated (MCA), which confers 

upon the Board of Environmental Review (BER) and the Department of Environment Quality 

(Department) certain authorities to adopt rules and implement the MT CAA. 

The regulatory authority to implement programs appropriate for controlling emissions of regulated air 

pollutants is contained in the Administrative Rules of Montana (ARM), specifically Chapter 8 of Title 17 for 

Air Quality. 

Those requirements of 42 USC §7410(a)(2) that are in the approved SIP or recently submitted SIP 

revisions relate to enforceable emission limits and schedules for compliance; monitoring, source testing 

and emissions reporting; recordkeeping and reporting requirements; and permit fees. Some 

requirements, such as intergovernmental consultation, air quality modeling, and compliance with Part D of 

Title I of the CAA, are fulfilled during the development and submission to EPA as a SIP revision of 

attainment plans. 
State of Montana 

11 O(a)(2) SIP Requirements for Lead 

§110(a)(2) CAA Requirement Montana's Requirements 

Montana has determined that no reductions in lead emissions are required for mai

NAAQS. Enforceable control measures exist to protect the lead NAAQS througho

implements a stationary source permit program which requires subject sources to 

will not cause or contribute to a violation of any NAAQS. ARM 17.8.749. Subject 

required to utilize best available control technology (BACT) when installing emissio

Except for specific control measures adopted in BER orders, the emission limits an

control regulations are contained in the following subchapters of Title 17, Chapter 8

General Provisions; Subchapter 3 - Emission Standards; Subchapter 4 -Stack He

Techniques; Subchapter 6- Open Burning; Subchapter 7- Permit, Construction a

Contaminant Sources; Subchapter 8 - Prevention of Significant Deterioration of Ai

Include enforceable Permit Requirements for Major Stationary Sources or Major Modifications Locating 

emission limitations and Areas; Subchapter 10- Preconstruction Permit Requirements for Major Stationary 

other control measures, Modifications Locating within Attainment or Unclassified Areas; Subchapter 16- E

means, or techniques Requirements for Oil and Gas Well Facilities Operating Prior to Issuance of a Mont

(including economic 

§110(a)(2) incentives such as fees, Montana does not exempt from legal enforcement actions excess emissions that o

(A} marketable permits, shutdown, maintenance, or malfunction. Emissions in excess of permit or regulato

and auctions or violations, subject to affirmative defenses with the burden of proof on the responde

emissions rights), as 

well as schedules and State Rule(s) Federal Action* A

timetable for ARM 17.8.101 etseq. approved 

compliance. ARM 17.8.301 et seq. approved 

ARM 17.8.401 et seq. approved 

ARM 17.8.401 et seq. approved 

ARM 17.8.601 et seq. approved 

ARM 17.8.701 et seq. approved ARM 17.8.801 et seq. approved 

ARM 17.8.901 et seq. approved 

ARM 17.8.1001 et seq. approved 

I ARM 17.8.1601 et seq. none MT s
§110(a)(2) 

(D) 

required in parts C and 

D. 

(i) Contain adequate 

provisions prohibiting 

any source or other 

type of emissions 

activity from emitting any air pollutant in 

amounts which will: 

(1) Contribute 

significantly to 

nonattainment in, or 

interfere with 

maintenance by, any 

other State with 

State Rule(s) I Federal Action* I A

ARM17.8.130 I approved I 

ARM 17.8.801 et seq. I approved I 

ARM 17.8.901 et seq. I approved I 

ARM 17.8.1001 et seq. I approved I 

*EPA subsequently approved revisions to many of these rules promulgated in later Federal 

for those revisions upon which EPA failed to act and which are currently being addressed a

8 SIP backlog initiative. 

The provisions in state law for the enforcement of emission limitations and other c

techniques are contained in the MT CAA, 75-2-101 et seq., MCA, and specifically, 

of the Board and 75-2-112, MCA, Powers and Responsibilities of Department. 

On August 20, 2010, the Department provided EPA a report regarding status and 

of its NSR/PSD program in light of EPA rulemaking. The Department stated the fo

"On June 3, 2010, EPA promulgated the final Prevention of Significant Deterio

(PSD) and Title V Greenhouse Gas (GHG) Tailoring Rule ("Tailoring Rule," Do

EPA-HQ-OAR-2009-0517). In the preamble for the Tailoring Rule EPA reques

feedback regarding each state's ability to implement the provisions of the Tailo

Montana's existing rules and regulations provide the framework for implementa

PSD and Title V programs consistent with the Tailoring Rule provisions". 

Montana is not a state for which EPA "narrowed" its previous approval of SIP PSD 

GHG-emitting sources. 75 FR 82536. 

The Montana SIP contains adequate provisions prohibiting any source or type of e

the State from emitting any air pollutant in any amounts that Will contribute significa

or interfere with the maintenance by any other State with respect to the lead NAAQ

regulations are included in ARM Chapter 17.8, subchapters 7, 8, 9 and 10. 

Sources in Montana are subject to permit requirements pursuant to NSR and Mon

(MAQP) requirements. Montana law requires that any proposal constructing a new 

pote(ltial to emit 5 tons per year or greater or modifying a facility that has the poten

greater than 0.6 tons per year of lead emissions would be subject to the requireme

ARM 17.8.740, et seq. The facility also would be prohibited from legally operating 

and obtaining a major NSR permit under the provisions of ARM 17.8.801, et seq. 

In addition to controls that may be required under the MAQP program and NSR, so
respect to any such required to comply with control, emission limitations, and monitoring requirements 

national primary or Maximum Achievable Control Technology (MACT) and New Source Performance 

secondary ambient may minimize any lead emissions. These rules, current operating practices, and c

air quality standard. sources in Montana from emitting lead in amounts that would contribute significant

(II) Interfere with interfere with the maintenance by any other State with respect to the lead NAAQS. 

measures required 

to be included in the As stated in EPA's guidance on 110(a)(1) and (2) SIP elements for the 2008 lead 

applicable less than 

0.5 tpy or that are located more than 2 miles from a state border general

implementation plan contribute significantly to nonattainment in another state. With regard to the 11 O(a

for any other State requirement, EPA's guidance discusses the general insignificance of Pb-related im

under part C to impairment, and states that significant impacts from Pb emissions from stationary 

prevent significant be limited to short distances from the source. Montana affirms that there are no so

deterioration of air greater lead emissions located within two miles of the state border. Due to the lim

quality or to protect area source lead emissions in Montana, the Department has concluded that lead e

visibility. 

(ii) Insure compliance 1) Do not significantly contribute to nonattainment in or interfere with maintenance 

with the applicable regards to the lead NAAQS; requirements CAA 2) Do not interfere with the measures required to implement prevention of significa

sections § 126 and 115 protection of visibility in any other State; and (interstate and 3) Do not preclude the State from insuring compliance with CAA section §126 and 

international pollution 

abatement). Consistent with 40 CFR 166(q)(2)(iv), Montana's PSD program requires the Depar

affected states, tribes, and federal land managers of its intent to approve or disapp

application. ARM 17.8.826. 

Provide: (i) necessary Whenever Montana revises its SIP, the submittal includes copies of the appropriate 

assurances that the document that the state has adopted the emission limitations and other measures 

state (or, except where and maintenance of any NAAQS, including the 2008 lead NAAQS. No organizatio

the administrator Department will participate in implementing or enforcing this SIP. deems inappropriate, 

the general purpose No state or federal provisions prohibit the implementation of any provision of the M

local government or devotes adequate resources to SIP development and maintenance sufficient to en

§110(a)(2) governments, or a maintenance of the NAAQS for lead. Montana receives from EPA grant monies int

(E)(i) regional agency to protect NAAQS. Montana allocates a portion of the EPA grant money to fund SI

designated by the state and maintenance of the NAAQS. Montana imposes and collects fees from permit 

or general purpose allocates all of the permit fee revenue to activities associated with permitting and c

local governments for sources of air pollutants, including criteria pollutant emissions. Montana also recei

such purpose) will have 

adequate personnel, conduct state air quality program activities. Montana allocates all state general fun

funding , and authority program activities, including SIP programs for attainment and maintenance of the N

under state (and, as 
appropriate, local) law The Air Resources Management Bureau has 49.86 fulltime equivalent positions wi

to carry out such $6,037,313 dollars for state fiscal year 2012. The program funding is broken down 

implementation plan from state general funds, $1.465,364 from federal grants, and $4.412,222 from sta

(and is not prohibited does not anticipate the need for additional resources to implement the plan for the 

by any provision of those which have been utilized for the preparation of the plan and plan revisions s

federal or state law current programmatic demands. Montana anticipates funding amounts will remain 

from carrying out such next five years. implementation plan or 

portion thereof). The provisions in state law which provide for adequate resources are contained in 

seq., MCA. More specifically, those provisions are contained in 75-2-102, 75-2-11

Montana's statutes on rules of conduct for public officers and public employees sp

(ii) requirements that requirements for those serving on boards like the BER. Members of the BER, like 

public employees, are prohibited from participating in decisions that would create a 

§110(a)(2) the state comply with members are required to recuse themselves from rule-makings in which their impa

(E)(ii) the requirements questioned. The BER oversees the Department, including actions taken by the sta

respecting state boards composition and requirements of the BER are detailed in 2-15-3502, MCA, 2-15-12

under section 128, and MCA. Laws related to conflict of interest in Montana state government are found in 

202, MCA. 

(iii) Necessary 

assurances that, where 

the state has relied on 

a local or regional 

government, agency, or There are seven county air pollution control programs authorized to carry out certa

§110(a)(2) instrumentality for the SIP within their respective county boundary. See§ 75-2-102 and 75-2-301 , MCA. 

(E)(iii) implementation of any BER retain oversight authority in the event the local authority fails to act. § 75-2-11

plan provision, the state 

has responsibility for 

ensuring adequate 

implementation of such 

plan provision. 

Require, as may be Montana requires stationary sources subject to state regulation to annually submit 

prescribed by the to complete a source emissions inventory. Affected permits require emissions mon

Administrator: (i) the sources of air pollution. Further, on an annual basis, the Department compiles a st

installation, inventory of all regulated sources for the evaluation of compliance with applicable s

§110(a)(2) maintenance, and EPA database. (F) replacement of 

equipment, and the 

implementation of other 

necessary steps by 

owners or operators of 
§110(a)(2) 

(G) 

§110(a)(2) 

(H) 

stationary sources to 

monitor emissions from 

such sources, 

(ii) periodic reports on 

the nature and amounts 

of emissions and 

emissions-related data 

from such sources, and 

(iii) correlation of such 

reports by the state 

agency with any emission limitations or 

standards established 

pursuant to this Act, 

which reports shall be 

available at reasonable 

times for public 

inspection; 

Provide for authority 

comparable to that in 

section 303 and 

adequate contingency 

plans to implement 

such authority. 

Provide for revision of 

such plan: (i) from time 

to time as may be 

necessary to take 

account of revisions of such national primary 

or secondary ambient 

air quality standard or 

the availability of 

improved or more 

expeditious methods of 

attaining such standard, 

and (ii) except as 

provided in paragraph 

(3)(C), whenever the 

Administrator finds on 

State Rule(s) I Federal Action I A

ARM 17.8.105 I Approved I 

ARM 17.8.106 I Approved* I 

ARM 17.8.505 I Not submitted I 

*EPA subsequently approved revisions to many of these rules promulgated in later Federal 

for those revisions upon which EPA failed to act and which are currently being addressed a

8 SIP backlog initiative. 

On January 

3, 2006, EPA approved Montana's Emergency Episode Avoidance Pla

Montana's EEAP made provision for emergency control of all criteria pollutants, inc

authority granted by the 75-2-402, MCA, Emergency Procedures and the Montana

may order sources of pollution to limit or cease emissions. The MT CAA is not sub

Montana's SIP is a compilation of regulations, plans, and submittals that act to imp

quality in accordance with national standards. The MT CAA confers upon the BER 

amend, and repeal rules for administering, implementing, and enforcing rules prom

emissions of air pollutants, including rules necessary to establish measures to atta

NAAQS. The Governor submits for inclusion into the SIP rules determined to be n

maintain the NAAQS. 

State law contains provisions for adoption of rules and regulations in the MT CAA, 

More specifically, those provisions are contained in 75-2-102, MCA Intent- Policy 

MCA, Powers of the Board and 75-2-112, MCA, Powers and Responsibilities of De

Montana's statutory or regulatory authority prohibits the State from revising the SIP 

to the NAAQS. 
the basis of information 

available to the 

Administrator that the 

plan is substantially 

inadequate to attain the national ambient air 

quality standard which 

it implements, or to 

otherwise comply with 

any additional 

requirements 

established under this 

Act. 

In the case of a plan or 

plan revision for an All control plans for NAAs in Montana are prepared in accordance with the applicab

area designated as a §110(a)(2) NAA, meet the USC 7501-7505. NAA plans required under part Dare required on a different sche

(I) applicable requirements 11 O(a)(2) infrastructure elements and will be reviewed and acted upon through a se

of part D (relating to currently approved NAA SIP provisions listed in 40 CFR 52, Subpart BB also meet 

NAA); 

Montana satisfies EPA's requirements for intergovernmental relations, see 59 FR 2

changed or revoked consultation processes since that time. Montana holds public 

on all SIP revisions in accordance with 40 CFR 51, Appendix V and Montana's ope

203, MCA. 

Meet the applicable 

requirements of § 121 On January 3, 2006, EPA approved Montana's EEAP in 71 FR 19. Montana's EEA

(relating to pollutants, including lead. The EEAP contains provisions for disseminating informa

consultation), section exceedance of the NAAQS to appropriate news media, health officials, law enforce

§11 O(a)(2) 

127 (relating to public Department notice includes recommendations for actions citizens may take to redu

(J) notification), and Part C activities and reduce their exposure. Montana also complies with 40 CFR §51 .930 

(relating to prevention events. 

of significant 

deterioration of air Congress directed States to develop and implement measures to prevent significan

quality and visibility quality pursuant to 42 USC §7471 . Montana adopted permitting requirements for m

protection); to modify or construct; PSD rules in Subchapter 8 and nonattainment NSR rules in 

17, Chapter 8, ARM. Montana continues to implement and enforce these rules. M

Federal Land Managers as needed and/or required. 
State Rule(s) Federal Action A

ARM 17.8.801 et seq. Approved* 

ARM 17.8.1001 etseq. Approved* 

*EPA subsequently approved revisions to many of these rules promulgated in later Federal 

for those revisions upon which EPA failed to act and which are currently being addressed as 

8 SIP backlog initiative. 

EPA Region VIII is developing a Regional Haze Federal Implementation Plan (RH 

RH FIP will provide further visibility protection and improvements to federal Class I 

Provide for: Montana requires an applicant proposing to construct or modify a source of criteria 

(i) the performance of the facility can be expected to operate in compliance with applicable law and that it 

such air quality contribute to a violation of any NAAQS. Sources subject to the provisions of Title 1

modeling as the subchapters 

7, 8, 9, and 10, ARM (regulating construction of new or modified statio

Administrator may with PSD and NSR requirements) shall demonstrate the facility can be expected to 

prescribe for the with applicable law and that it will not cause or contribute to a violation of any NAA

purpose of predicting 

the effect on ambient State Rule(s) Federal Action* A

air quality of any ARM 17.8.701 et seq. approved 

§110(a)(2) emissions of any air ARM 17.8.801 et seq. approved 

(K) pollutant for which the 

Administrator has ARM 17.8.901 et seq. approved 

established a national ARM 17.8.1001 etseq. approved 

ambient air quality *EPA subsequently approved revisions to many of these rules promulgated in later Federal 

standard, and for those revisions upon which EPA failed to act and which are currently being addressed as 

(ii) the submission, 8 SIP backlog initiative. 

upon request, of data 

related to such air Absent any privacy restrictions regarding the release of confidential business inform

quality modeling to the data and analysis regarding the results of source predictive modeling for purposes 

Administrator; public information available for anyone, including EPA, to review upon request. 

Require the owner or Montana has an approved Title V permitting program. Montana requires an applica

operator of each major or modify an air pollution source to pay an application fee. See ARM 17.8.504. Pu

stationary source to Montana assesses an annual air quality operation fee against the owner or operato

pay to the permitting MAQP, or an operating permit, or which is registered with the Department as an oil 

§110(a)(2) authority, as a ARM 17.8.1701, etseq. 

! (L) condition of any permit I required under this State Rule(s) Federal Action A

Act, a tee sufficient to ARM 17.8.504 Not submitted 

cover-

(i) the reasonable ARM 17.8.505 Not submitted 

costs of reviewing and ARM 17.8.1701, et seq. None yet MT 
§110(a)(2) 

(M) 

acting upon any application for such a 

permit, and 

(ii) if the owner or 

operator receives a 

permit for such source, 

the reasonable costs of 

implementing and 

enforcing the terms and 

conditions of any such 

permit (not including 

any court costs or other 

costs associated with 

any enforcement action}, until such fee 

requirement is 

superseded with 

respect to such sources 

by the Administrator's 

approval of a fee 

program under title V; 

Provide for 

consultation and 

participation by local political subdivisions 

affected by the plan. 

As a matter of practice, the Department consults with the local agencies when nec

control plan for a NAA. The Department also meets with county air pollution contr

discusses monitoring issues, including lead, prior to making decisions regarding m

type, locations, and monitoring schedules. 

Section 75-2-112(2)0) of the MT CAA requires the Department to " ... advise, consu

with other agencies of the state, local governments, industries, other states, interst

agencies, the United States, and any interested persons or groups; ... " 

Parties affected by Department actions, including local political subdivisions, may 

hearing and address of their grievances, see ARM 17.8.140, 17.8.141 and 17.8.14

State Rule(s) Federal Action A

ARM 17.8.140 Approved 

ARM 17.8.141 Approved 

ARM 17.8.142 A_BEFoved 
On an annual basis, the Department evaluates trends in industrial and economic d

and population growth, and conducts other scientific, social, and geographic obser

the state which may be adversely affected by the impact of criteria pollutants. Bas

Department identifies potential air pollution "hotspots." The Department, with parti

local county air pollution control program staff and other interested persons, develomonitor type, location, and schedules for monitoring air quality in these hotspots. T

decision-making process, the annual monitoring network plan, is made available by 

Provide for public review and comment prior to submission to EPA. Further, in accordance with 

beginning in July 2010, and every 5 years thereafter, Montana develops a periodic 

establishment and ensure the effective implementation of an adequate ambient air quality surveillance 

operation of appropriate network assessment is made available by the Department for public review and co

devices, methods, submission to EPA. 

systems, and 

§110(a)(2) procedures necessary Pursuant to its Quality Assurance Project Plans, the Department makes arrangeme

(B) to monitor, compile, maintain federal reference monitors and establishes federally-approved protocols f

and analyze data on handling, and analysis·. Ambient air monitoring data is subject to strict quality assu

ambient air quality, and processes. Air monitoring data is submitted to EPA's national "AIRS" database. upon request, make 

such data available to Montana monitored ambient air for lead in several areas of the state from the 1970

the Administrator. 2001 , when the remaining ambient lead monitors in East Helena were terminated f

ASARCO's primary lead smelter. Since then, no ambient monitoring has been con

no areas in Montana where ambient monitoring would be required based on the mi

specified in the revised lead monitoring rule. Each year during the annual monitori

need for resumption in ambient lead monitoring is carefully analyzed. 

The provisions in state law for the collection and analysis of ambient air quality data 

CAA, 75-2-101 et seq., MCA, and specifically, 75-2-112, MCA, Powers and Respon

Include a program to Congress directed States to develop and implement measures to prevent significan

provide for enforcement air quality pursuant to 42 USC §§7 4 70, et seq. and 7501, et seq. Pursuant to ARM 

the of measures in § subject to the provisions of Title 17, Chapter 

8, subchapters 

8, 9, and 10, ARM, reg

11 O(a)(2)(A), and new or modified stationary sources consistent 

with PSD and New Source Review (

regulation of the be subject to enforcement. The Department has the authority to issue a notice of v

modification and 

§110(a)(2) regarding the source violation, and an order to take corrective action. On March 29

construction of any (C) EPA's promulgation of the NSR Reform provisions, Montana submitted to EPA a de

stationary source within program equivalency (equivalency demonstration) as approved under the rules cite

the areas covered by 

the plan as necessary To date, EPA has not responded to Montana's equivalency demonstration. 

to assure that NAAQS 

are achieved, including 

a permit program as