"Destructive field investigation" means a field investigation that alters the physical structure, associations, setting, context, or aspect of a site. There are four levels of destructive field investigations, which range from the least to the most destructive: reconnaissance Phase IA survey with or without sampling, Phase IB intensive archaeological survey, Phase II site evaluation or site examination, and Phase III data recovery.
N.H. Admin. Code § Cul-H 102.10
#10217, eff 10-30-12