1 

6560.50
 

ENVIRONMENTAL PROTECTION AGENCY
 

40 CFR Part 52
 

[EPA-R08-0AR-2009-0052; FRL- 9136-6]
 

Approval and Promulgation of Air Quality Implementation Plans; Wyoming; Revisions to 

the Wyoming Air Quality Standards and Regulations 

AGENCY: Environmental Protection Agency (EPA). 

ACTION: Direct final rule. 

SUMMARY: EPA is approving two State Implementation Plan revisions submitted by the State 

of Wyoming on September 11, 2008. Wyoming has revised its Air Quality Standards and 

Regulations, specifically Chapter 1, Section 5, Unavoidable equipment malfunction, and Chapter 

1, Section 6, Credible evidence. Because these revisions conform to the Clean Air Act and EPA 

regulations, EPA is approving the revisions with the intention of making them Federally 

enforceable. EPA is taking this action under section 110 of the Clean Air Act. 

DATES: This rule is effective on [Insert date 60 days after publication in the Federal Register] 

without further notice, unless EPA receives adverse comment by [Insert date 30 days after 

publication in the Federal Register]. If adverse comment is received, EPA will publish a timely 

withdrawal of the direct final rule in the Federal Register informing the public that the rule will 

not take effect. 

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R08-0AR-2009­

0052, by one of the following methods: 

• http://www.regulations.gov. Follow the on-line instructions for submitting 
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comments. 

•	 E-mail: dolan.kathy@epa.gov 

•	 Fax: (303) 312-6064 (please alert the individual listed in the FOR FURTHER 

INFORMATION CONTACT if you are faxing comments). 

•	 Mail: Director, Air Program, Environmental Protection Agency (EPA), Region 8, 

Mai1code 8P-AR, 1595 Wynkoop Street, Denver, Colorado 80202-1129. 

•	 Hand Delivery: Director, Air Program, Environmental Protection Agency (EPA), 

Region 8, Mai1code 8P-AR, 1595 Wynkoop Street, Denver, Colorado 80202­

1129. Such deliveries are only accepted Monday through Friday, 8:00 a.m. to 

4:30 p.m., excluding Federal holidays. Special arrangements should be made for 

deliveries of boxed information. 

Instructions: Direct your comments to Docket ID No. EPA-R08-0AR-2009-0052. 

EPA's policy is that all comments received will be included in the public docket without change 

and may be made available online at http://www.regulations.gov, including any personal 

information provided, unless the comment includes information claimed to be Confidential 

Business Information (CBI) or other information whose disclosure is restricted by statute. Do 

not submit information that you consider to be CBI or otherwise protected through 

http://www.regulations.gov or e-mail. The http://www.regulations.gov Web site is an 

"anonymous access" system, which means EPA will not know your identity or contact 

information unless you provide it in the body of your comment. If you send an (>omail comment 

directly to EPA without going through http://www.regulations.gov, your e-mail address will be 

automatically captured and included as part of the comment that is placed in the public docket 
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and made available on the Internet. If you submit an electronic comment, EPA recommends that 

you include your name and other contact information in the body of your comn1ent and with any 

disk or CD-ROM you submit. If EPA cannot read your comment due to technical difficulties and 

cannot contact you for clarification, EPA may not be able to consider your comment. Electronic 

files should avoid the use of special characters, any form of encryption, and be free of any defects 

or viruses. For additional instructions on submitting comments, go to Section 1. General 

Information of the SUPPLEMENTARY INFORMATION section of this document. 

Docket: All documents in the docket are listed in the http://www.regulations.gov index. 

Although listed in the index, some information is not publicly available, e.g., CBI or other 

information whose disclosure is restricted by statute. Certain other material, such as copyrighted 

material, will be publicly available only in hard copy. Publicly available docket materials are 

available either electronically in http://www.regulations.gov or in hard copy at the Air Program, 

Environmental Protection Agency (EPA), Region 8, 1595 Wynkoop Street, Denver, Colorado 

80202-1129. EPA requests that if at all possible, you contact the individual listed in the FOR 

FURTHER INFORMATION CONTACT section to view the hard copy of the docket. You 

may view the hard copy ofthe docket Monday through Friday, 8:00 a.m. to 4:00 p.m., excluding 

Federal holidays. 

FOR FURTHER INFORMATION CONTACT: Kathy Dolan, Air Program, U.S. 

Environmental Protection Agency (EPA), Region 8, Mailcode 8P-AR, 1595 Wynkoop Street, 

Denver, Colorado 80202-1129. 303-312-6142, dolan.kathy@epa.gov 

SUPPLEMENTARY INFORMATION: 
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Table of Contents 

I. General Information 

II. Background of Wyoming's Submissions 

III. EPA's Review of Wyoming's Submissions 

IV. Consideration of Section 110(1) of the CAA 

V. Final Action 

VI. Statutory and Executive Order Reviews 

Definitions 

For the purpose of this document, we are giving meaning to certain words or initials as follows: 

(i) The words or initials Act or CAA mean or refer to the Clean Air Act, unless the context 

indicates otherwise. 

(ii) The words EPA, we, us or our mean or refer to the United States Environmental Protection 

Agency. 

(iii) The initials SIP mean or refer to State Implementation Plan. 

(iv) The words State or Wyoming mean the State of Wyoming, unless the context indicates 

otherwise. 

I. General Information 

A. What Should I Consider as I Prepare My Comments for EPA? 

1. Submitting eBI Do not submit this information to EPA through http://regulations.gov 

or e-mail. Clearly mark the part or all of the information that you claim to be CBI. For CBI 

information in a disk or CD ROM that you mail to EPA, mark the outside of the disk or CD 

ROM as CBI and then identify electronically within the disk or CD ROM the specific 
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infonnation that is claimed as CBI. In addition to one complete version of the comment that 

includes infonnation claimed as CBI, a copy of the comment that does not contain the 

infonnation claimed as CBI must be submitted for inclusion in the public docket. Infonnation so 

marked will not be disclosed except in accordance with procedures set forth in 40 CFR part 2. 

2. Tipsfor Preparing Your Comments. When submitting comments, remember to: 

a.	 Identify the rulemaking by docket number and other identifying infonnation 

(subject heading, Federal Register date and page number). 

b.	 Follow directions - The agency may ask you to respond to specific questions or 

organize comments by referencing a Code of Federal Regulations (CFR) part or 

section number. 

c.	 Explain why you agree or disagree; suggest alternatives and substitute language 

for your requested changes. 

d.	 Describe any assumptions and provide any technical infonnation and/or data that 

you used. 

e.	 If you estimate potential costs or burdens, explain how you arrived at your 

estimate in sufficient detail to allow for it to be reproduced. 

f.	 Provide specific examples to illustrate your concerns, and suggest alternatives. 

g.	 Explain your views as clearly as possible, avoiding the use of profanity or 

personal threats. 

h.	 Make sure to submit your comments by the comment period deadline identified. 

II. Background of Wyoming's Submissions 

On September 11, 2008 the State of Wyoming submitted to EPA two fonnal revisions to 
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Wyoming's State Implementation Plan (SIP). These revisions amend Wyoming's Air Quality 

Standards and Regulations. In particular, Wyoming has revised Chapter 1, Common Provisions, 

Section 5, Unavoidable equipment malfunction, and has added a new section-Section 6, 

Credible evidence-to Chapter 1. 

A. Chapter 1, Common Provisions, Section 5, Unavoidable equipment malfunction. 

Wyoming has revised its unavoidable equipment malfunction rule in response to a series 

of EPA actions. On November 16, 2000, the Administrator of the EPA issued an order granting 

in part a petition to object to Wyoming's issuance of a Title V permit. In the Matter of 

Pacificorp 's Jim Bridger and Naughton Electric Utility Steam Generating Plants, Petition No. 

VIII-00-1 (Nov. 16,2000). In the order, the Administrator directed EPA's regional office in 

Denver (EPA Region 8) to review Wyoming's Abnormal Conditions and Equipment 

Malfunction rule. On November 1, 2002, in another Title V petition order, the Administrator 

repeated this direction. In the Matter of Title V Permit for Buckingham Lumber Company, 

Buckingham Lumber Mill, Petition No. VIII-2002-01 (Nov. 1,2002). After completing its 

review, EPA Region 8 identified for Wyoming deficiencies in the rule. Letter from Richard R. 

Long, Director, Air and Radiation Program, EPA Region 8, to Dan Olson, Administrator, 

Wyoming's Department of Environmental Quality (Jan. 30,2003). EPA Region 8 noted that the 

rule did not conform to Clean Air Act requirements to protect National Ambient Air Quality 

Standards (NAAQS) and Prevention of Significant Deterioration (PSD) increments. Specifically, 

the rule allowed an exemption from enforcement for excess emissions that occurred during 

malfunctions and certain other conditions. EPA's interpretation was and continues to be that the 

Clean Air Act requires that all periods of excess emissions be treated as violations that cannot be 
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ex~mpted from enforcement. EPA therefore requested that the rule be revised. 

On November 16,2005, the Environmental Quality Council of the Wyoming Department 

of Environmental Quality approved a revision to the Abnormal Conditions and Equipment 

Malfunction rule. The revision removed the existing automatic exemption and replaced it with 

enforcement discretion provisions for excess emissions caused by malfunctions. The revision 

became State-effective January 30, 2006. On September 11, 2008, the Governor of the State of 

Wyoming submitted the revision to Region 8. 

B. Chapter 1, Common Provisions, Section 6, Credible evidence. 

Wyoming has added the credible evidence section to its rules in response to an EPA SIP 

call. On February 24, 1997, EPA revised its rule governing the use of credible evidence in 

enforcement actions. 62 FR 8314. In parallel, EPA directed its Regional Offices to conduct a 

SIP call to States in order to ensure consistency with the revised credible evidence rule. On 

October 20, 1999, EPA Region 8 issued a SIP call to Wyoming. In a letter from EPA Regional 

Administrator William P. Yellowtail notifying Wyoming of the SIP call, EPA stated that the 

Wyoming SIP did not comply with sections 110(a)(2)(A) and (C) of the CAA because the SIP 

could be interpreted to limit the types of credible evidence or information that could be used for 

determining compliance and establishing violations. 

On October 23, 2000, the Environmental Quality Council of the Wyoming Department of 

Environmental Quality approved revisions to the Wyoming Air Quality Standards and 

Regulations, including the addition of a provision (Chapter 1, Common Provisions, Section 6, 

Credible evidence) allowing for the use of credible evidence in enforcement actions. The added 

provision became State-effective December 8, 2000. On September 11, 2008, the Governor of 
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the State of Wyoming submitted the revision to Region 8. 

III. EPA's Review of Wyoming's Submissions. 

To determine if Wyoming's submissions should be approved by EPA, EPA must evaluate 

the submissions for consistency with the CAA and EPA regulations. 

A. Revision to Chapter 1, Common Provisions, Section 5, Unavoidable equipment malfunction. 

EPA's interpretations ofthe Act regarding excess emissions caused by equipment 

malfunctions are contained in several documents. Most relevant to this action are the following 

documents: a memorandum dated September 28, 1982, from Kathleen M. Bennett, Assistant 

Administrator for Air, Noise, and Radiation, entitled "Policy on Excess Emissions During 

Startup, Shutdown, Maintenance, and Malfunctions"; a clarification to that memorandum from 

Kathleen M. Bennett issued on February 15, 1983; and a memorandum entitled "State 

Implementation Plans: Policy Regarding Excess Emissions During Malfunctions, Startup, and 

Shutdown," from Steven A. Herman, Assistant Administrator for Enforcement and Compliance 

Assurance, and Robert Perciasepe, Assistant Administrator for Air and Radiation, dated 

September 20, 1999. I 

As explained in these memoranda, excess emissions are those air emission levels that 

exceed any applicable emission limitation. Because excess emissions might aggravate air quality 

so as to prevent attainment and maintenance of the NAAQS or jeopardize the PSD increments, 

EPA views all periods of excess emissions as violations of the applicable emission limitation. 

1 The relevant interpretations were not affected by a subsequent memorandum titled 'Reissuance of Clarification ­

State Implementation Plans (SIPs): Policy Regarding Excess Emissions During Malfunctions, Startup, and 

Shutdown," dated December 5, 2001, from Eric Schaeffer, Director, Office of Regulatory Enforcement, Office of 

Enforcement and Compliance Assurance, and John S. Seitz, Director, Office of Air Quality Planning and Standards, 

Office of Air and Radiation. 
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Therefore, EPA will disapprove all SIP revisions that automatically exempt from enforcement 

excess emissions claimed to result from an equipment malfunction. In addition, EPA will 

disapprove SIP revisions that give discretion to a state director to determine whether an instance 

of excess emissions is a violation of an emission limitation, because such a determination could 

bar EPA and citizens from enforcing applicable requirements. 

Instead, under EPA's interpretations, if a state chooses to address violations for excess 

emissions that occur as a result of claimed malfunctions, the state may take two approaches. The 

first, the "enforcement discretion" approach, allows a state director to refrain from taking 

enforcement action for a violation if certain criteria are met. The second, the "affirmative 

defense" approach, allows a source to avoid penalties if it can prove that certain conditions are 

met. 

Wyoming has selected the enforcement discretion approach. Under this approach, the 

state director, in evaluating whether to exercise discretion to decline enforcement for a violation 

caused by an unavoidable malfunction, should consider whether the following criteria have been 

satisfied: 

1.	 To the maximum extent practicable the air pollution control equipment, process 

equipment, or processes were maintained and operated in a manner consistent with good 

practice for minimizing emissions; 

2.	 Repairs were made in an expeditious fashion when the operator knew or should have 

known that applicable emission limitations were being exceeded. Off-shift labor and 

overtime must have been utilized, to the extent practicable, to ensure that such repairs 

were made as expeditiously as practicable; 
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3.	 The amount and duration of the excess emissions (including any bypass) were minimized 

to the maximum extent practicable during periods of such emissions; 

4.	 All possible steps were taken to minimize the impact of the excess emissions on ambient 

air quality; and 

5.	 The excess emissions are not part of a recurring pattern indicative of inadequate design, 

operation, or maintenance. 

We have evaluated Wyoming's enforcement discretion provisions for excess emissions 

caused by unavoidable equipment malfunctions. The provisions are consistent with EPA's 

interpretations ofthe CAA as described in the memoranda above. Specifically, Chapter 1, 

Common Provisions, section 5(b) gives the Wyoming Air Quality Division discretion when 

deciding whether to "pursue enforcement after considering whether excess emissions resulted 

from an unavoidable equipment malfunction." The Division is to make this decision by 

evaluating, on a case-by-case basis, information to be subn1itted by the source after an incident. 

The information submitted by the source and considered by the Division is defined in section 

5(a)(i)(A) and generally parallels the criteria outlined in the Kathleen Bennett memoranda 

discussed above. The source has the burden to provide sufficient information to demonstrate that 

the Division should use its discretion. 

EPA's memoranda also discuss a point not explicitly addressed in Wyoming's new rule. 

There is no language in the new rule explicitly stating that, even when the Division exercises its 

discretion and declines enforcement, that exercise of discretion does not bar EPA or any citizen 

from taking an enforcement action for the violation. However, there is also no language in the 

new rule explicitly creating such a bar. EPA therefore interprets the rule, consistent with EPA's 
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interpretations of the CAA, as not barring EPA and citizen enforcement for violation of 

applicable requirements when the Division declines enforcement. Under this interpretation, the 

new rule is consistent with the CAA. EPA is therefore approving the revisions to Chapter 1, 

Common Provisions, Section 5. 

B. Addition to Chapter 1, Common Provisions, Section 6, Credible evidence. 

On February 24,1997, EPA promulgated regulations under section 113(a) and 113(e)(1) 

of the CAA clarifying the use of non-reference test data-"credible evidence"-in enforcement 

actions and compliance certifications. 62 FR 8314. In particular, the regulations prohibit state 

implementation plans from precluding the use of credible evidence. The regulations state: "For 

the purpose of submitting compliance certifications or establishing whether or not a person has 

violated or is in violation of any standard in this part, the plan must not preclude the use, 

including the exclusive use, of any credible evidence or information, relevant to whether a source 

would have been in compliance with applicable requirements if the appropriate performance or 

compliance test or procedure had been performed." 40 CFR 51.212(c). 

EPA has reviewed Wyoming's new credible evidence rule. The new rule mirrors the 

language in 40 CFR 51.212(c) quoted above and provides for the use of credible evidence in 

enforcement actions and compliance certifications. Therefore, it is consistent with the CAA and 

EPA regulations. As a result, EPA is approving the addition of the new credible evidence rule, 

Chapter 1, Common Provisions, Section 6, Credible evidence, into Wyoming's SIP. 

IV. Consideration of Section 110(1) of the CAA 

Under section 110(1) of the Clean Air Act, EPA cannot approve a SIP revision if the 

revision would interfere with any applicable requirements concerning attainment and reasonable 
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further progress toward attainment of the NAAQS or any other applicable requirement of the 

Act. The Wyoming SIP revisions that EPA approves today do not interfere with attainment of 

the NAAQS or any other applicable requirement of the Act. The first revision removes a 

provision from the Wyoming SIP that provided an outright exemption from emission limits 

during malfunctions. In place of the exemption, the SIP now provides-in accordance with the 

CAA-that the Wyoming Air Quality Division may exercise its enforcement discretion after 

considering whether excess emissions resulted from an unavoidable equipment malfunction. In 

the absence of the previous automatic exemption, sources will now have a greater incentive to 

comply with their emission limits, which will protect the NAAQS and increments to a greater 

degree than under the previous rule. The second revision, providing for use of credible evidence, 

also protects the NAAQS and increments to a greater degree by allowing for enhanced 

enforcement of emissions limits. Therefore, section 110(1) requirements are satisfied. 

v. Final Action 

EPA is approving SIP revisions that Wyoming submitted on September 11, 2008. The 

Environmental Quality Council of the Wyoming Department of Environmental Quality adopted 

revisions to Chapter 1, Common Provisions, Section 5, Unavoidable equipment malfunction on 

November 16, 2005; these revisions became State-effective on January 30, 2006. The Council 

added Chapter 1, Common Provisions, Section 6, Credible evidence, to the Wyoming Air Quality 

Standards and Regulations on October 23, 2000; this addition becan1e State-effective on 

December 8, 2000. 

EPA is publishing this rule without prior proposal because the Agency views this as a 

noncontroversial amendment and anticipates no adverse comments; we are merely approving 
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changes to Wyoming's air rules that conform to the CAA and EPA regulations. However, in the 

"Proposed Rules" section oftoday's Federal Register publication, EPA is publishing a separate 

document that will serve as the proposal to approve the SIP revision if adverse comments are 

filed. This rule will be effective [Insert date 60 days after publication in the Federal Register] 

without further notice unless the Agency receives adverse comments by [Insert date 30 days after 

publication in the Federal Register.] If the EPA receives adverse comments, EPA will publish a 

timely withdrawal in the Federal Register informing the public that the rule will not take effect. 

EPA will address all public comments in a subsequent final rule based on the proposed rule. 

The EPA will not institute a second comment period on this action. Any parties interested in 

commenting must do so at this time. Please note that if EPA receives adverse comment on an 

amendment, paragraph, or section of this rule and if that provision may be severed from the 

remainder of the rule, EPA may adopt as final those provisions of the rule that are not the subj ect 

of an adverse comment. 

VI. Statutory and Executive Order Reviews 

Under Executive Order 12866 (58 FR 51735, October 4, 1993), this action is not a 

"significant regulatory action" and therefore is not subject to review by the Office of 

Management and Budget. For this reason, this action is also not subject to Executive Order 

13211, "Actions Concerning Regulations That Significantly Affect Energy Supply, Distribution, 

or Use" (66 FR 28355, May 22, 2001). This action merely approves State law as meeting 

Federal requirements and imposes no additional requirements beyond those imposed by State 

law. Accordingly, the Administrator certifies that this rule will not have a significant economic 

impact on a substantial number of small entities under the Regulatory Flexibility Act (5 U.S.C. 
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601 et seq.). Because this rule approves pre-existing requirements under State law and does not 

impose any additional enforceable duty beyond that required by State law, it does not contain any 

unfunded mandate or significantly or uniquely affect small governments, as described in the 

Unfunded Mandates Refonn Act of 1995 (Public Law 104-4). 

This rule also does not have tribal implications because it will not have a substantial 

direct effect on one or more Indian tribes, on the relationship between the Federal Government 

and Indian tribes, or on the distribution of power and responsibilities between the Federal 

Government and Indian tribes, as specified by Executive Order 13175 (65 FR 67249, November 

9, 2000). This action also does not have Federalism implications because it does not have 

substantial direct effects on the States, on the relationship between the national government and 

the States, or on the distribution of power and responsibilities among the various levels of 

government, as specified in Executive Order 13132 (64 FR 43255, August 10,1999). This 

action merely approves a State rule implementing a Federal standard and does not alter the 

relationship or the distribution of power and responsibilities established in the Clean Air Act. 

This rule also is not subject to Executive Order 13045, "Protection of Children from 

Environmental Health Risks and Safety Risks" (62 FR 19885, April 23, 1997), because it 

approves a State rule implementing a Federal standard. 

In reviewing SIP submissions, EPA's role is to approve State choices, provided that they 

meet the criteria of the Clean Air Act. In this context, in the absence of a prior existing 

requirement for the State to use voluntary consensus standards (VCS), EPA has no authority to 

disapprove a SIP submission for failure to use VCS. It would thus be inconsistent with 

applicable law for EPA, when it reviews a SIP submission, to use VCS in place of a SIP 
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submission that otherwise satisfies the provisions of the Clean Air Act. Thus, the requirements 

of section 12(d) of the National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 

272 note) do not apply. This rule does not impose an infonnation collection burden under the 

provisions of the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.). 

The Congressional Review Act, 5 U.S.C. section 801 et seq., as added by the Small 

Business Regulatory Enforcement Fairness Act of 1996, generally provides that before a rule 

may take effect, the agency promulgating the rule must submit a rule report, which includes a 

copy of the rule, to each House of the Congress and to the Comptroller General of the United 

States. EPA will submit a report containing this rule and other required infonnation to the U.S. 

Senate, the U.S. House of Representatives, and the Comptroller General of the United States 

prior to publication of the rule in the Federal Register. A major rule cannot take effect until 60 

days after it is published in the Federal Register. This action is not a "major rule" as defined by 5 

U.S.C. section 804(2). 

Under section 307(b)(1) of the Clean Air Act, petitions for judicial review of this action 

must be filed in the United States Court of Appeals for the appropriate circuit by [FEDERAL 

REGISTER OFFICE: insert date 60 days from date of publication of this document in the 

Federal Register]. Filing a petition for reconsideration by the Administrator of this final rule 

does not affect the finality ofthis action for the purposes ofjudicial review nor does it extend the 

time within which a petition for judicial review may be filed, and shall not postpone the 

effectiveness of such rule or action. Parties with objections to this direct final rule are 

encouraged to file a comment in response to the parallel notice of proposed rulemaking for this 

action published in the proposed rules section of today' s Federal Register, rather than file an 
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direct final rule and address the comment in the proposed rulemaking. This action may not be 

challenged later in proceedings to enforce its requirements. (See section 307(b)(2).) 

List of Subjects in 40 CFR Part 52 

Environmental protection, Air pollution control, Carbon monoxide, Incorporation by 

reference, Intergovernmental relations, Lead, Nitrogen dioxide, Ozone, Particulate matter, 

Reporting and recordkeeping requirements, Sulfur oxides, Volatile organic compounds. 

'--1/'/10 , 

Dated: Carol L Campbell 

Acting Deputy Regional Administrator 

Region 8 
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40 CFR part 52 is amended to read as follows: 

PART 52 [AMENDED] 

1. The authority citation for Part 52 continues to read as follows: 

Authority: 42 U.S.C. 7401 et seq. 

Subpart ZZ - Wyoming 

2. Section 52.2620 is amended by revising paragraph (b)(3) ; and the table in paragraph 

(c)(1) is amended under Chapter 1 by revising the entry for Section 5 and adding an entry for 

Section 6. to read as follows: 

§ 52.2620 Identification of plan. 

* * * * * 

(b) * * * 

(3) Copies ofthe materials incorporated by reference may be inspected at the Environmental 

Protection Agency, Region 8, 1595 Wynkoop Street, Denver, Colorado, 80202-1129; the 

Environmental Protection Agency, Air and Radiation Docket and Information Center, Air Docket 

(6102), 1200 Pennsylvania Ave., NW., Washington, DC, 20460; or the National Archives and 

Records Administration (NARA). For information on the availability ofthis material at NARA, 

call 202-741-6030, or go to http://www.archives.govlfederal-register/cfr/ibr-locations.htm!. 

(c) * * * 

(1) * * * 

State Citation Title/Subject State adopted 

and effective 

Date 

EPA approval date 

and citation 1 

Explanation 

* * * * 

Chapter 1 

* * * 
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Section 5 Unavoidable 

Equipment 

Malfunction 

Credible 

Evidence 

* * 

11/16/05, 

1/30/06 

10/23/00, 

12/8/00 

* * * 

[Insert date of 

publication in the 

Federal Register] 

[Insert FR page 

nurrlber where 

document begins] 

Section 6 [Insert date of 

publication in the 

Federal Register] 

[Insert FR page 

number where 

document begins1 I 

* * 1 .. In order to determne the EPA effective date for a speCific provIsion that IS listed In this table, consult the Federal Register 

cited in this column for that particular provision 

* * * * *