Welcome to the ARE Community, @theresaninh69! Thanks for writing in.
According to this code section, the site grading must slope away from footings at 5% minimum slope for at least 10 feet. This prevents ponding of water against the footings. As an alternative, swales may be used and sloped at 2% minimum where located within 10 feet of the building foundation.
Per exception #1, a minimum 2% slope may be allowed in certain climatic/soil conditions.
Check out Building Codes Illustrated (page 378) for a great visual of this. While this resource is not specifically an NCARB-recommended resource, I found it very helpful to visualize various code requirements.
Hope this helps!
Kiara Galicinao, AIA, NCARB
Black Spectacles