A controlled list that indicates the target being investigated by this
feature (feature of interest): Deep Foundation - investigation of deep foundation
elements. Earthworks - earth materials excavated and/or emplaced by engineering
activity. Ground Improvement - observations of and activities designed to alter the
characterstics of natural ground. Ground Water - hydrology and chemistry of ground
water. Indoor Atmosphere - meteorology and chemistry of air in indoor spaces.
Natural Ground - earth materials sampled in natural or undisturbed state. Outdoor
Atmosphere - meteorology and chemistry of air in outdoor spaces. Surface Water -
hydrology and chemistry of surface water. Other terms can be used by prefacing the
term with "Other:"