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Contact Information:
Department of Environmental Quality
122 W. 25th Street
Cheyenne, WY 82002
(307) 777-3786
Or view the Department's
Website
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WYOMING
DE MINIMIS EXEMPTIONS:
There are no fixed exemption limits. The state does have the ability to waive requirements based on impacts
and emission rates on a case-by-case basis.
MINOR SOURCE PERMITTING:
The applicant must first call the agency or write a letter of intent. If the unit is very small (no numbers
were given) applicant may be exempted. If the applicant is on the borderline of a threshold and requirements are
not clear, officials will require a general application. Based on this application the state will determine if
a BACT analysis is necessary. It is likely to be required for units that are 400 hp and greater. The state does
not have a BACT cost threshold, rather they will supply some emission limits to attempt and the applicant calculates
the cost of achieving each limit. The state will then decide what it considers reasonable based on past permits.
Natural gas engines have recently been permitted at 1 g/hp-hr for NOx. The permit issued is a construction permit.
All units are supposed to obtain an operating permit, but the state is behind in the process so many units use
their construction permit instead. Construction permits require a 30-day public comment period and the entire process
is likely to take around 120 days.
MAJOR NSR/PSD PERMITTING:
A potential to emit 100 tons or more of any criteria pollutant triggers PSD and a BACT analysis. The state
permitted 3 simple cycle turbines with a capacity of 35 MW each (at a single site) at 25 ppm for NOx and 50 ppm
for CO. Two gas cogenerating units with combined cycle turbines of 40 MW each were permitted at 3.5 ppm for NOx.
TREATMENT OF EMERGENCY ENGINES:
Applicant must submit a letter describing emissions, location and size of the unit. The unit cannot operate
more than 500 hours per year for emergencies and maintenance only. If the potential to emit at 500 hours per year
triggers Title V, controls will be required. If not, the applicant will likely receive an exemption that assumes
the unit will follow the specifications in the original letter submitted to the department.
SPECIAL ISSUE:
The state is having a boom in coal-bed methane extractions. In order to deal with permitting these units the state
has established a general permit for diesel, natural gas and propane engines less than 400 hp and used for this
purpose. This issue has backed up the regular permitting process, so many units that were supposed to receive an
operating permit are still using a construction permit.
Although onsite electrical generators do not fall under the jurisdiction of the Wyoming Public Service Commission,
they do need to obtain several permits from the Wyoming Department of Environmental Quality. These permits regulates
air and water emissions. Any hazardous chemical or waste may also be regulated. The socioeconomic impacts of
construction are considered by the
Industrial Siting Division.
Department of Fire Prevention and Electrical Safety
(BBRS):
The Department is a service agency with public responsibilities in the area of fire investigation, fire
service education and training, building construction plan reviews, fire safety inspections, electrical
safety inspections and licensing of the electrical industry.
Wyoming State Fire Marshal
International Code Council State Adoption Information Page
Provides an easy to use US map to locate state and local adoption of the International Code Council's model codes.
US DOE's Office of Building Technology, State and Community Programs, Building Codes Database
The US DOE's database provides a comprehensive look at a state's building code implementation and enforcement
process.
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