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FOR INCLUSION IN WYOMING STATE IMPLEMENTATION PLAN

FROM WYOMING AIR QUALITY STANDARDS AND REGULATIONS

Nonattainment Area Regulations

CHAPTER 8

Section 5. Ozone nonattainment emission inventory rule.

(a) Applicability.

(i) This rule applies to a facility or source operating in an ozone 

nonattainment area(s), as identified in 40 CFR part 81, if:

(A) The facility or source has been granted permit approval to 

construct and/or operate under Chapter 6 of the Wyoming Air Quality Standards and 

Regulations (WAQSR); or

(B) It is an individual oil or gas facility or source; or

(C) Actual emissions from the stationary facility or source are 

greater than or equal to twenty-five (25) tons per year of volatile organic compounds 

(VOCs) as defined in Chapter 3, Section 6(a) of the WAQSR, or oxides of nitrogen 

(NOx).

(I) If NOx or VOCs are emitted from a facility or source at 

or above the applicability threshold identified in subsection (a)(i)(C), both air 

contaminants must be included in the emission inventory even if one of the air 

contaminants is emitted at a level below the applicability threshold.

(ii) Compliance with emission inventory requirements established under 

WAQSR Chapter 6, Section 3(f)(v)(G), satisfies the requirements of this rule.

(b) Reporting and Recordkeeping Requirements.

(i) As specified in the forms required in subsection (b)(v), each emission 

inventory shall include:

(A) Actual emissions of NOx, VOC, and any other air 

contaminants as determined by the Division Administrator, in tons per year for any 

calendar year emission inventory, or in tons for any partial year emission inventory;

(B) The physical location at which the actual emissions occurred;
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(C) The name and address of the person or entity operating or 

owning the facility or source; and

(D) The nature of the facility or source.

(ii) The emission inventory submittal dates are as follows:

(A) By April 30th of each year for all emissions that occurred 

during the previous calendar year; and

(B) No later than ninety (90) days after the end of a partial year 

inventory for emissions that occurred during the partial year as determined by the 

Division Administrator.

(iii) After the owner or operator submits an emission inventory for all 

facility or source emissions that occurred during calendar year 2014, the owner or 

operator shall submit an emission inventory for such facility or source every year 

thereafter.

(iv) Each owner or operator of a facility or source shall maintain a copy 

of the emission inventory submitted to the Division, and records indicating how the 

information submitted was determined, including any calculations, data, and 

measurements used.

 

(A) Records shall be kept for a period of at least five (5) years 

from the required submittal date listed in subsection (b)(ii) for each emission inventory.

(B) The owner or operator of the facility or source shall make the 

records required in subsection (b)(iv) available for inspection by any representative of the 

Division upon request.

(v) The owner or operator shall submit emission inventories using 

Division-prescribed hard copy or electronic formats.

(vi) All emission inventory submissions shall be certified as being true, 

accurate, and complete by a responsible official to the best of their knowledge. A 

responsible official is an individual who is responsible for the data provided in the 

emission inventory, and who accepts responsibility for the emission accuracy.

(c) Compliance. Compliance with WAQSR Chapter 8, Section 5, does not 

relieve any owner or operator of a facility or source from the responsibility to comply 

with any other applicable reporting requirements set forth in any federal or State law, rule 

or regulation, or in any permit.
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Section 10. Incorporation by reference.

(a) Code of Federal Regulations (CFR). All Code of Federal Regulations 

(CFRs) cited in this chapter, including their Appendices, revised and published as of July 

1, 2012, not including any later amendments, are incorporated by reference. Copies of

the Code of Federal Regulations are available for public inspection and copies can be 

obtained at cost from the Department of Environmental Quality, Division of Air Quality, 

122 W. 25th Street, Cheyenne, Wyoming 82002. Copies of the CFRs can also be 

obtained at cost from Government Institutes, 15200 NBN Way, Building B, Blue Ridge 

Summit, PA 17214.