What triggers a State Environmental Policy Act Review (SEPA)?
1. The construction or location of any residential structures of more than four dwelling units (5 +);
2. The construction of a barn, loafing shed, farm equipment storage building, produce storage or packing structure, or similar agricultural structure, covering 30,000 square feet or more and to be used only by the property owner or his or her agent in the conduct of farming the property.
3. The construction of an office, school, commercial, recreational, service or storage building with 12,000 square feet of gross floor area or more and with associated parking facilities for 40 or more automobiles;
4. The construction of a parking lot designated for 40 or more automobiles;
5. Any landfill or excavation of 200 cubic yards or more throughout the total lifetime of the fill or excavation;
6. The installation or removal of impervious underground or above-ground tanks, having a total capacity of 10,000 gallons or more except on agricultural and industrial lands. On agricultural and industrial lands, the installation or removal of impervious underground or above-ground tanks, having a total capacity of 60,000 gallons or more;
7. Rezoning of property;
8. Critical Area Protection.
You can find a full listing of Categorical Exemptions in WAC 197-11-800.
If SEPA Review is necessary as a part of your project, you will be required to complete a SEPA Environmental Checklist.
For guidance on how to complete the SEPA Checklist, please visit the State of Washington Department of Ecology website.