"VARIABLE"	"DESCRIPTION"	"SAMPLE_TYPE"	"UNITS"	"RANGE_LOW"	"RANGE_HIGH"	"LEGAL_VALUES"
"AGGR_ECO3_2015"	"NARS 3-level reporting region (2015), based on aggregating AGGR_ECO9_2015 reporting regions: EHIGH=Eastern Highlands (NAP, SAP); PLNLOW=Plains and Lowlands (CPL, NPL, SPL, TPL, UMW); WMTNS=Western Mountains and Xeric (WMT, XER)."					
"AGGR_ECO9_2015"	"NARS 9-level reporting region (2015), based on aggregated Omernik Level III ecoregions: CPL=Coastal Plains; NAP=Northern Appalachians; NPL=Northern Plains; SAP=Southern Appalachians; SPL=Southern Plains; TPL=Temperate Plains; UMW=Upper Midwest; WMT=Western Mountains; XER=Xeric West."					
"LAT_DD83"	"Nominal latitude in decimal degrees"					
"LON_DD83"	"Nominal longitude in decimal degrees"					
"RT_NRSA"	"Reference/So-so/Trashed designations for sites used in NRSA"					
"SITE_ID"	"Site identification code"					
"UID"	"Unique site visit ID"					
"VISIT_NO"	"Visit number for that year"					
"YEAR"	"Sampling year"