AMBNT	Monitoring ambient conditions of the environment.  Includes facility intakes pulling directly from an ambient source (e.g., STREAM/AMBNT/MUN/INTAKE)
NONAMB	Monitoring at or within a man-made facility.  Compliance monitoring falls into this category.  Includes sites where facility discharge has directly influenced or impacted though not necessarily polluted the environment (e.g., PIPE/NONAMB/IND/OUTFL/NTRTMT)
