VARNUM	NAME	LABEL	TYPE	LENGTH
1	SITE_ID	Unique site identification number	2	25
2	VISIT_NO	Lake visit number. 1-1st field sampling visit; 2-2nd field sampling visit	1	
3	SITE_TYPE	PROB_Samp: Lake is from probability sample and can be used for population estimation.  REF_Lake: Lake is not from probability sample and was selected as a candidate reference lake	2	9
4	LAKE_SAMP	Evaluation status	2	20
5	SAMPLED_CORE	Sediment core sample collected?	2	20
6	DATECORE	Date sediment core sample collected	1	
7	INDXSAMP_CORE	Index sediment core sample for site (YES/NO)-typically the Visit 1 Primary sample	2	3
8	SAMPLE_ID	Sample ID number	1	
9	SAMPLE_TYPE	4 character code for type of sample taken	2	4
10	SAMPLE_CLASS	Sediment sample from SED/TOP/BOTTOM	2	3
11	CORE_LENGTH	Length of sediment core (cm)	1	
12	INTERVAL_FROM	Depth of the bottom of the sediment core slice	1	
13	INTERVAL_TO	End of sediment core	1	
14	FLAG_FLD_CORE	Field data qualifier flags for sediment core samples	2	8
15	COMMENT_FLD_CORE	Comments and field flag explanations for sediment core samples	2	1000
16	SAMPLE_CATEGORY	(P)rimary or Field (D)uplicate	2	4
17	SAMP_ID	Field sample ID (character format)	2	6
18	NLA_TAXANAME	Taxon as assigned by laboratory for use in NLA	2	130
19	TAXON_FREQ	Frequency of taxon record in sample (should be 1)	1	
20	ABUND	Number of valves counted	1	
21	REL_ABUND	Percent of total counted (ABUND/COUNT_TOTAL)	1	
22	COUNT_TOTAL	Total number of valves counted in subsample	1	
23	OTU_LUMP_1	OTU Name assigned for lumping alternative 1	2	150
24	OTU_LUMP_2	OTU Name assigned for lumping alternative 2	2	150
25	OTU_LUMP_3	OTU Name assigned for lumping alternative 3	2	150
26	FLAG_LAB_CORE	Laboratory data qualifier flag for sediment core samples	2	12
27	COMMENT_LAB_CORE	Laboratory comments and flag explanations for sediment core samples	2	1000
