"VARIABLE"	"DESCRIPTION"	"SAMPLE_TYPE"	"UNITS"	"RANGE_LOW"	"RANGE_HIGH"	"LEGAL_VALUES"
"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."					
"ANC_COND"	"Site condition class based on acidity"	"CHEM"	""			"None|Episodic|ACID-AMD|ACID-aciddep|ACID-organic|No Data"
"DATE_COL"	"Date of field collection"					
"NTL_COND"	"Site condition class based on total nitrogen concentration"	"CHEM"	""			"Good|Fair|Poor|No Data"
"PTL_COND"	"Site condition class based on total phosphorus concentration"	"CHEM"	""			"Good|Fair|Poor|No Data"
"SAL_COND"	"Site condition class based on conductivity"	"CHEM"	"NONE"			"Good|Fair|Poor|No Data"
"SAMPLE_TYPE"	"Sample type"					
"SITE_ID"	"Site identification code"					
"UID"	"Unique site visit ID"					
"VISIT_NO"	"Visit number for that year"					
"YEAR"	"Sampling year"