"Suitability of Soil
The Appraiser must consider the readily observable soil and subsoil conditions of the site, including the type and permeability of the soil, the depth of the water table,
surface drainage conditions, compaction, rock formations and other physical features that affect the value of the site, or its suitability for development or support of the
existing improvements.The Appraiser should also consider events and published reports regarding the instability of the soil and surface support of the land as related to the subject and
proximate properties. The Appraiser must analyze and report how this would affect the Property."
https://portal.HUD.gov/hudportal/documents/huddoc?id=40001HSGH.pdf
Did the appraiser disclose they are not a Geologist.
Did the board explain how to observe subsoil conditions without digging.