Landfill A typically dry location on the surface of the land where primarily solid waste products are currently, or previously have been, aggregated and sometimes covered with a veneer of soil. See also: Wastewater disposal and waste-injection well. 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.