This file contains provisional Sediment Toxicity Test Control Replicate data for National Coastal Condition Assessment. These data are used to establish control survival for comparison to sample survival for tests run in the same BATCH_ID (CONTROL_ID).			
"See Sediment Toxicity Control Summary, Sediment Toxicity Sample Replicate and Sediment Toxicity Sample Summary data files for more information."			
"Preliminary quality reviews of these data have been completed. However, they are not considered to be final until the National Coastal Condition Assessment 2020 & 21 Report is published."			
			
Data may be updated at any time. The changelog for the associated file may be found below the column name definitions.                                          			
End-users are responsible for reviewing the suitability of these data for their purposes.                                               			
"Please bring any questions about the data to the attention of Hugh Sullivan, NCCA Lead at sullivan.hugh@epa.gov.                                              "			
                                                			
                                                			
This file does not include information used to determine the statistical weight for each site. Future updates of the SiteInfo file will include site weights.                                           			
Future publications of the SITEINFO Files will include information about site weights                                           			
                                                			
                                                			
"For information about NCCA protocols, please check the NCCA 2020 Field Operations Manual, Site Evaluation Guidelines; Lab Operations Manual, and Quality Assurance Project Plan on the NCCA Website: https://www.epa.gov/national-aquatic-resource-surveys/manuals-used-national-aquatic-resource-surveys#National%20Coastal%20Condition%20Assessment"			
			
			
VARIABLE			DESCRIPTION
PUBLICATION_DATE			Date the dataset was published to the NARS site
SAMPLE_TYPE			Code identifying sample type
TEST_TYPE			Test Type (Marine/Freshwater)
TYPE			Identifies test as a CONTROL test or Field Sample Test 
BATCH_ID			Batch id number for associating Control tests to sample tests.
CONTROL_ID			Identifying code for control test associated with each batch. Used as batch id number for associating Control tests to sample tests.
ORGANISM			Name of organism used in toxicity testing. Freshwater sample test organism is Hyalella azteca. Estuarine sample test organism is Leptocheirus plumulosus.
ORGANISM_BATCH_ID			Identifies organism batch used for testing samples and control within the batch (CONTROL_ID)
DILUTION_WATER_BATCH			Identifies dilution water batch used for testing samples and control within the batch (CONTROL_ID)
LAB			Lab that conducted analysis
REP			Sequential replicate number
CHAMBER			Test chamber in which replicate was tested
LOADED			Number of organisms loaded into a test chamber
NUM_SURVIVAL			Number of surviving organisms in the replicate
REP_PER_SURVIVAL			percent of loaded organisms that survived the test in a replicate
NARS_FLAG			NARS flag. ND = Nondetect; H = holding time issue (holding times for each analyte may be found in the Laboratory Operation Manual https://www.epa.gov/sites/default/files/2016-05/documents/ncca_2015_qapp_version_2.1.pdf); S = shipping issue; L = Less than reporting limit but above MDL; Q = other quality issue. See comment.
NARS_COMMENT			Comment explaining NARS_FLAG or LAB_COMMENT if necessary
			
			
CHANGE LOG			
			
DATE		ACTION	
10/25/2022		Initial publication of provisional data to the National Aquatic Resource Suveys Data Page