Do I need an application?

The ISR Rule applies to two categories of projects: development and transportation or transit projects that meet any of applicability criteria listed below. Projects subject to the ISR Rule are required to submit an Air Impact Assessment (AIA) application no later than applying for a project-level approval from a public agency.

Development Projects

District Rule 9510 applies to any applicant that seeks to gain a final discretionary approval for a development project, or any portions thereof, which upon full build-out will include any one of the following:

50 residential units
2,000 square feet of commercial space
25,000 square feet of light industrial space
100,000 square feet of heavy industrial space
20,000 square feet of medical office space
39,000 square feet of general office space
9,000 square feet of educational space
10,000 square feet of government space
20,000 square feet of recreational space
9,000 square feet of space not identified above.

Additionally, District Rule 9510 applies to any applicant that seeks to gain approval from a public agency for a large development project, which upon full build-out will include any of the following:

250 residential units
10,000 square feet of commercial space
125,000 square feet of light industrial space
500,000 square feet of heavy industrial space
100,000 square feet of medical office space
195,000 square feet of general office space
45,000 square feet of educational space
50,000 square feet of governmental space
100,000 square feet of recreational space
45,000 square feet of space not identified above.

Transportation or Transit Projects

Any transportation or transit project where construction exhaust emissions equal or exceed two (2.0) tons of NOx or two (2.0) tons of PM10.

Building Clean Air Measures Into Your Project

Indirect Source Review Rule

Do I need an Application?

Development Projects

Transportation or Transit Projects