VARIABLE	LEGAL_VALUES	DESCRIPTION
TYPE		Type of solution being tested in the well
BATCH_PASS		Did the Control Survival meet QC requirement for FW or Marine samples?
BATCH_SAMPLES		Number of samples tested in batch
CONTROL		Control substrate
END_DATE		End date of test
MEAN_NSURV		Mean number survived
ORGANISM		Name of organism used in toxicity testing
SD_NSURV		Standard deviation of number survived
START_DATE		Start date of test
TEST_TYPE		Test Type (Marine/Freshwater)
LAB		Lab that conducted analysis
PUBLICATION_DATE		Date the dataset was published to the NARS site
MEAN_PSURV		Mean percent survival
SD_PSURV		Standard deviation percent survival
BATCH_ID		Laboratory batch number
SAMPLE_TYPE		Code identifying sample type