Establishment should include using leveling devices to determine the top of a continuous footing that will provide a level surface throughout. Grades must meet local building codes.
IRC: Chapter 4, section R403 (https://codes.iccsafe.org/content/IRC2018P4), covers footing placement and tolerances for a variety of masonry walls.
Process/Skill Questions:
NCCER Standards:
Masonry: Level One (L1NCCT28)
Masonry Level Two