VARIABLE	LEGAL_VALUES	DESCRIPTION
TYPE		Type of solution being tested in the well
ORGANISM		Name of organism used in toxicity testing
ORGANISM_BATCH_ID		Code for batch of organisms
TEST_TYPE		Test Type (Marine/Freshwater)
LAB		Lab that conducted analysis
PUBLICATION_DATE		Date the dataset was published to the NARS site
REP		Sequential replicate number
NUM_SURVIVAL		Number of surviving organisms
PER_SURVIVAL		Percentage of surviving organisms
BATCH_ID		Laboratory batch number
SAMPLE_TYPE		Code identifying sample type
CONTROL_ID		Identifying code for control test associated with each batch