This file contains provisional Sediment Toxicity Test Sample Summary data for National Coastal Condition Assessment. "See Sediment Toxicity Control Replicate, Sediment Toxicity Sample Replicate and Sediment Toxicity Control 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 Definition PUBLICATION_DATE Date the dataset was published to the NARS site UNIQUE_ID "Unique site ID based on location only. Allows tracking of repeated visits to the same location over time. Does not change based on year sampled, Visit number or any other factor. Form is NCA_ss_nnnnn where ss state and nnnnn is number that starts at 10001. No missing values allowed. Text" UID Unique identifier for the site/visit SITE_ID "NCCA Site ID for the study and year sampled. Preferred form is NCAnn_MM-xxxxx where nn is survey cycle year (04, 08, 13, 18, etc), MM is two letter state code, and xxxxx is between 10001 and 99999. No missing values allowed. No missing values allowed." VISIT_NO Sequential visit an index period; Visit: 1 or 2 YEAR Year site visited DATE_COL Date sample or data were collected STUDY Name of primary study site belongs to. A unique site may belong to multiple studies. NCCA_REGION "National Coastal Condition Assessment Region. Northeast includes states ME, NH, MA, RI, CT, NY, NJ, MD, DE, and VA. Southeast includes NC, SC, GA, and east coast of FL. Gulf of Mexico includes the west coast of Florida, Alabama, Mississippi, Louisiana and Texas. West Coast includes Washington, Oregon and California. Great Lakes includes the US shore of all Great Lakes. No missing values allowed." PSTL_CODE "State (US) or province (Canada) two letter postal code for site sampled. 50 state postal codes plus AS, MP, GU, PR, VI for American Samoa, Commonwealth of Northern Marianas, Guam, Puerto Rico and Virgin Islands. No missing values allowed." SAMPLE_ID NCCA Sample ID SAMPLE_TYPE Code identifying sample type LAB Lab that conducted analysis DATE_RECEIVED Date sample received by lab. ARRIVAL_TEMP Temperature upon arrival at lab TEST_TYPE Test Type (Marine/Freshwater) SEDIMENT_LOAD_DATE Date sediment was loaded into test chambers SEDIMENT_LOAD_TIME time of day sediment was loaded into test chambers ORGANISM_LOAD_DATE Time test organisms were loaded into test chambers. Method calls for organism load date and time to be 24 hours later than sediment load date and time. Minor deviations are allowable. ORGANISM_LOAD_TIME Date test organisms were loaded into test chambers. Method calls for organism load date and time to be 24 hours later than sediment load date and time. Minor deviations are allowable. START_DATE Date toxicity test began END_DATE Date toxicity test ended. The NCCA uses 10 day acute toxicity tests BATCH_ID BATCH_ID for connecting 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_ID CONTROL Describes the type of clean control sediment that was used for the control sample tests. Typically freshwater NCCA samples are compared to clean control artificial sediment. Marine NCCA samples are compared to clean control natural sediment. BATCH_SAMPLES Number of samples tested in batch CBF_BATCH Control Batch Failure: Did the Control Survival meet QC requirement for FW or Marine samples? P or {blank} = Pass. F = Fail. Samples processed in batches with CBF = F have been deprecated and are not used in NCCA Analysis. MEAN_NUM_SURV Mean number organism surviving across sample replicates. See Control Replicate file for individual replicate results. SD_NUM_SURV Standard deviation of number survived MEAN_REPLICATE_PER_SURVIVAL Mean percent of organism survival aross sample replicates. See Control Replicate file for individual replicate results. SD_PER_SURV Standard deviation percent survival CONTROL_PCT_SURVIVAL Mean percent of organism survival in associated CONTROL test replicates. See Control Replicate file for individual replicate results. Used for comparison to sample mean replicate percent survival to calculate control corrected percent survival for the sample. CONTROL_CORR_PER_SURV Control-corrected Survival of Amphipods in Toxicity Tests. Calculated by dividing mean percent survival of test organisms in sample replicates by mean percent survival of test organisms in control replicates. 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