Permitting

Major Source Operating Permit

Prevention of Significant Deterioration (PSD)

Facilities in attainment or unclassifiable areas must comply with PSD requirements for new construction or significant modifications.

Implementation of Best Available Control Technology (BACT), ambient air quality analyses, and public engagement processes.

Major sources or significant modifications in areas that meet or exceed air quality standards.

Nonattainment New Source Review

Facilities located in "nonattainment" areas for one or more National Ambient Air Quality Standards (NAAQS) may need this permit before undertaking new projects or modifications.

Includes emission offsets, installation of Lowest Achievable Emission Rate (LAER) technology, public notification, and environmental justice assessments.

For facilities in areas where pollutant levels exceed NAAQS limits.

Title V Operating Permit

A federally mandated permit for major sources of air pollution, consolidating all applicable air quality requirements into a comprehensive document.

Facilities must maintain thorough records, submit regular reports, and certify compliance with all applicable regulations annually.

Required for facilities emitting pollutants at or above major source thresholds.

Synthetic Minor Operating Permit

Synthetic Minor Operating Permit (FESOP)

Facilities with potential emissions above major source thresholds but operating below those levels can obtain this permit to ensure compliance while avoiding Title V obligations.
We offer the completion of FESOPs for facilities located in the state of Illinois.

Enforce operational or production limits to cap emissions below major source thresholds.

Facilities near major source thresholds that accept conditions to remain classified as minor sources.

Federally Enforceable State Operating Permit

Strict compliance with state-set conditions aligned with federal standards, including operational and production limits.

For facilities operating as minor sources while adhering to enforceable federal requirements.

Minor Source Operating Permit

Minor Source Operating Permit (MSOP)

Facilities with emissions below major source thresholds may need this permit to maintain compliance.

Outlines monitoring, reporting, and operational requirements for minor sources.

Smaller facilities with emissions that do not meet major source criteria.

Lifetime Permits

For very low-emission facilities, lifetime permits reduce administrative burdens.

Minimal oversight while ensuring emissions remain stable and low.

Suitable for facilities with consistent, low emissions qualifying for indefinite permits.

Permit by Rule

Certain facilities with predictable, low-emission processes can qualify under predetermined permitting conditions.

Self-certification and straightforward recordkeeping, with no extensive inspections required.

For very small sources well below major source thresholds.

Permit by Rule

Certain facilities with predictable, low-emission processes can qualify under predetermined permitting conditions.

Facilities comply with standardized criteria rather than customized permit conditions.

Suitable for boilers, small-scale manufacturing, and emergency generators.

Construction Permits

Facilities planning construction or modifications that could impact air emissions must secure this permit before beginning work.

Ensures any new construction or operational changes meet regulatory standards.

Includes project specification reviews, air quality impact analyses, and potential emission control measures.

Applies to both major industrial facilities and smaller installations planning physical or operational changes.

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