Facility A non-ambient location where environmental measurements are expected to be strongly influenced by current or previous activities of humans. *Sites identified with a "facility" primary site type must be further classified with one of the applicable secondary site types. Facility Sites Adapted from USGS Site Types. http://wdr.water.usgs.gov/nwisgmap/help/sitetype.html ODM2 SiteType Controlled Vocabulary ODM2 Working Group A vocabulary for describing the type of a data collection Site. To some extent, these types represent the ultimate feature of interest that the site was established to measure. For example, a Stream Site was established to measure properties of a Stream.