Adapted from USGS Site Types. A location below the land surface, but not a well, soil hole, or excavation. http://wdr.water.usgs.gov/nwisgmap/help/sitetype.html Subsurface Groundwater Sites 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.