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ENTERING SLX DATA

 

The Site and Location Cross Reference (SLX) table captures the spatial and hydrogeologic flow relationships existing between a site, and locations associated to it.  These relationships are very important to a wide range of environmental activities such as: groundwater modeling and contaminant flow path studies, and numerous GIS and graphical data presentation applications.  The Geohydrologic Flow Classification (GFCCODE) field exists to indicate whether the hydraulic flow at a location is up, down, or cross gradient to its associated site.  The field Site Proximity Code (SPRCODE) exists to indicate whether a location lies within or is outside site boundaries, or whether the location is serving as background for the site.

 

GFCCODE        Definition

     U                A location positioned up-gradient hydrologically from the contaminant source.

     D                A location positioned down-gradient hydrologically from the contaminant source.

     C                A location positioned cross-gradient hydrologically from the contaminant source.

     Z                Not applicable, site is not associated with or is not in close proximity to a groundwater formation.

 

SPRCODE        Definition

    O                On-site

    E                Off-site

    B                Background by positioning in an area unaffected by the contaminant source.