Indirect Source Permits

Indirect source air quality modeling is used to permit new sources which do not directly emit air pollutants. For example, parking lots attract air contaminants from the exhaust of motor vehicles but they do not directly emit the emisisons from the surface of the parking lot. For additional information contact Mike Friedlander, the indirect source permitting contact, at 608-267-0806.

Overview

Wisconsin requires an indirect source permit for certain projects that attract motor vehicles. An indirect source refers to a stationary source that attracts mobile source activity and has associated air pollution at or near the site. Examples include highways and roads, parking facilities, entertainment facilities, education facilities, and transportation terminals.

The requirements for an indirect source permit are contained in ch. NR 411, Wis. Adm. Code (exit DNR). Unlike other permits, indirect source permits are completed by air quality modeling staff in the central office with assistance from regional compliance staff.

Environmental Assessment

For most indirect source permits, an environmental impact assessment (EA) must also be completed before an indirect source permit can be issued. Indirect source permits are considered Type II actions per ch. NR 150, Wis. Adm. Code (exit DNR). The applicant supplies information to DNR to address questions contained in the EA and the regional air compliance person writes the EA. The EA and the indirect source permit are generally presented at the same public hearing for comment if a public hearing is necessary.

Related Topics

Indirect Source Permit Exemptions

Indirect Source Permit Fees

Indirect Source Models