Sindy M. Mejia Emily H. Majcher Lee Blaney (UMBC) Ke He (UMBC) Andrew W. Psoras Trevor P. Needham Ellie P. Foss 20250314 tabular digital data https://doi.org/10.5066/P13WUBAD This metadata record consists of 3 tables containing per-and-poly-fluoroalkyl substances (PFAS) and polychlorinated biphenyls (PCB) concentration data of wastewater and biosolid samples from wastewater treatment plants within the Patapsco and Potomac watersheds. The PCB concentration data was used to assess the occurrence and fate of PCB in wastewater treatment plants within the Patapsco watershed, from December 2021 to December 2022; The PFAS concentration data was used to assess the occurrence and fate of PFAS within the Patapsco and Potomac watersheds, from 2021-2023. The PFAS total oxidizable precursors (TOP) assay data were used to investigate PFAS fate in the wastewater treatment process of plants within the Patapsco watershed from March and September of 2022. These data were collected to assess the status and occurrence, and magnitude of PCB and PFAS in wastewater and biosolid samples of multiple wastewater treatment plants with varying characteristics within the Patapsco and Potomac watersheds. Appropriate use of the data includes assessment of PCB and PFAS in wastewater and biosolids relative to various wastewater plants characteristics. 20211220 20230323 observed Complete None planned Pennsylvania, Maryland, Virginia, Washington D.C., and West Virginia -79.2664 -76.3879 39.8592 37.9052 ISO 19115 Topic Category environment geoscientificInformation inlandWaters USGS Thesaurus PFAS PCB Wastewater Biosolids Water Quality Water Quality Common geographic areas Maryland Virginia Pennsylvania Washington D.C. Marine Realms Information Bank (MRIB) keywords Chesapeake Bay Patapsco watershed Patapsco River Potomac watershed Potomac River USGS Metadata Identifier USGS:6634f0d3d34ee921b712b8f4 None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. U.S. Geological Survey, Northeast Region Sindy M. Mejia Physical Scientist mailing and physical

5522 Research Park Drive

Baltimore Maryland 21228 US 410-925-8098 smejia@usgs.gov Data collection was made possible through funding provided by the Urban Waters Federal Partnership Cooperative matching program and the USGS Ecosystem Mission Area. The data included in this release were collected and analyzed by the USGS and the University of Maryland Baltimore County (UMBC) PFAS research laboratory (Catonsville, Maryland). The PFAS dataset was produced using Microsoft Excel 365 v2308, in a Windows 10 Enterprise v22H2 environment. This file is 53.1 kilobytes and is in comma delimited (.csv) format. The PCB dataset was produced using Microsoft Excel 365 v2308, in a Windows 10 Enterprise v22H2 environment. This file is 52.9 kilobytes and is in comma delimited (.csv) format. The PFAS TOP dataset was produced using Microsoft Excel 365 v2308, in a Windows 10 Enterprise v22H2 environment. This file is 7.53 kilobytes and is in comma delimited (.csv) format. Quality assurance (QA)/quality control (QC) procedures were completed by the USGS and reporting laboratories and are summarized here. Clean hands/ dirty hands (CH/DH) methodology was used to reduce contamination risk during sampling. Both members of the sampling team wore nitrile gloves covered with elbow length polyethylene gloves to handle sample bottles and caps. DH only handled sampler and equipment and did not contact the sample or its container. CH handled only the sample bottles and caps. Field replicate samples were collected at random from 20% of all Patapsco watershed wastewater treatment plant sites during quarterly sampling events for each sample type (influent, effluent, and biosolids). Blanks were collected each quarter which included equipment and daily trip blanks for aqueous and solid samples. Field replicate samples were collected at random from 20% of all Potomac watershed wastewater treatment plant sites for each sample type (influent, effluent, and biosolids). Trip blanks were collected for each sampling day for aqueous and solid samples. Equipment blanks were collected for each sampling event for the same types of samples. Equipment blanks were collected by passing 18 M-Ohm deionized water and PFAS free sand over the sampling equipment in the field. Trip blanks were prepared by adding 18 M-Ohm deionized water and PFAS and PCB free sand to sampling containers utilized. PCB data qualifiers & definitions H: Relevant calibration check recovery > 130%; Value may be biased high. L: Relevant calibration check recovery < 70%; Value may be biased low. U: Measured value below calibration limit; Value represents lower LOQ for specific sample. E: Measured value above calibration limit; Estimated value. B: Detection in trip/method/equipment blank; Value may be affected by contamination. N: Limitations in passive sampler calibration/equilibration; Value not reported. R: Results for this compound are rejected due to serious deficiencies in the ability to analyze the sample and meet quality-control criteria; Presence or absence cannot be verified. S: Surrogate recovery < 70%; Value may be biased low. -: Qualifier does not apply; Reported value is the concentration. PFAS and PFAS TOP data qualifiers & definitions U: Associated concentration is less than the LOD and reported as the LOD. J: Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. B: Compound present in lab, trip, or equipment blank; Blank is above the LOD. The data include treatment descriptions for sample collection, receipt and analysis for PCB and PFAS. A horizontal accuracy test was not performed for this dataset. A vertical accuracy test was not performed for this dataset. Aqueous and Biosolids Collection: USGS personnel used the CH/DH methodology for collection of samples at all wastewater treatment plants. For aqueous samples, the uncapped HDPE bottle was secured into the metal weighted sampler and lowered into the influent or effluent water stream. The secured uncapped bottle was submerged below the surface twice for rinsing and retrieved once filled to the shoulder level of the bottle, capped, double bagged and put on ice. Overfilled bottles were dumped and re-sampled until desired level was accomplished. Biosolids samples were collected by hand and placed in their respective containers, HDPE centrifuge tubes for PFAS analysis and glass jars for PCB analysis. Polyethylene (PE) passive samplers were used to sample effluent wastewater at the Patapsco watershed wastewater treatment plants. The PE passive samplers were placed within a stainless-steel mesh frame. Samplers were placed in the effluent water flow and remained deployed for 3 months at each location. Upon retrieval the PE passive sampler sheets were removed from the frame, wiped clean using deionized water and Kim wipes and stored in glass vials for transport on ice. All aqueous samples were placed in a -18 degrees Celsius freezer upon arrival to the laboratory and later transferred to a -80 degrees Celsius freezer for storage until they were analyzed. PE passive samplers were kept in a -18 degrees Celsius freezer before analysis. Biosolid samples were later freeze dried in preparation for analysis. 20230325 PCB Analysis: All PCB analyses were performed and reported by the USGS MD-DE-DC Water Science Center Analytical Laboratory using gas chromatography-mass spectrometry (GC-MS), an electron capture detector according to U.S. EPA publication SW-846 Method 8082A with a modification based on Mullin (1994). Laboratory analytical methods for extractions and cleanup of biosolids and effluent samples were performed as described in the referenced scientific investigations report (Majcher and others, 2022). U.S. EPA. 2007. "Method 8082A(SW-846): Polychlorinated Biphenyls (PCB) by Gas Chromatography, part of Test Methods for Evaluating Solid Waste, Physical/Chemical Methods." Washington, DC. https://www.epa.gov/sites/default/files/2015-12/documents/8082a.pdf Mullin, M. PCB Congener Quantification for Lake Michigan Mass Balance Study. EPA National Health and Environmental Effects Research Laboratory, Grosse Ille, MI, 1994. Majcher, E., Ghosh, U., Needham, T.P., Lombard, N., Foss, E.P., Bokare, M., Joshee, S., Cheung, L., Damond, J., and Lorah, M., 2022, Refining Sources of Polychlorinated Biphenyls in the Back River watershed, Baltimore, Maryland, 2018-2020: U.S. Geological Survey Scientific Investigations Report, https://pubs.usgs.gov/sir/2022/5012/sir20225012.pdf 20230125 PFAS and PFAS TOP Analysis: PFAS analysis and PFAS by total oxidizable precursors assay were performed by the UMBC PFAS research laboratory by liquid chromatography with triple quadruple tandem mass spectrometry (LC-MS/MS). Quantitative analysis was performed following the procedure described by Blaney and He (2021). Blaney, L., and He, K. (2021, December 1). Appendix B: Standard Operating Procedures; B1. Scope and Applications (pp. 28-59). Ion Exchange Membranes and Fibers as Passive Samplers for Chemically diverse PFAS. Defense Technical Information Center. https://apps.dtic.mil/sti/citations/trecms/AD1187024 20220615 Vector Entity point 62 .0197513196 .0254118316 Decimal seconds North American Datum of 1983 (NAD 83) Geodetic Reference System 1980 6378137.000000 298.257222 PatapscoWWTP_PCBs_Data.csv Comma Separated Value (CSV) file containing PCB concentrations from biosolid samples and polyethylene passive samplers captured effluent samples of wastewater treatment plants within the Patapsco watershed in Maryland from March through December 2022. USGS Defined Sample_ID USGS generated unique sample identifier. USGS Defined Each sample was given a unique sequential number by the USGS that corresponds with the sample name for each specific site. Sample_Name Origin of wastewater or biosolid sample. USGS Defined Each site was given a unique name identifier. Collection_Date Date when the sample was collected from the site. USGS Defined 3/21/2022 12/21/2022 Watershed Watershed in which the site is located. USGS Defined Patapsco Affected watershed USGS Defined Sample_Type Sample source type USGS Defined Biosolids Dewatered and treated solid residuals of the wastewater treatment plant. USGS Defined Trip Blank BS Clean sand sample collected in the laboratory. USGS Defined Equipment Blank BS Clean sand sample collected in the field. USGS Defined Effluent Water discharged into a waterway after the wastewater treatment process. USGS Defined Concentration_Units PCB concentration units are in nanograms per gram of dry weight for biosolid (BS) samples and nanograms per liter for aqueous (AQ) samples. USGS Defined PCB concentration units are in nanograms per gram of dry weight for solid samples and nanograms per liter for aqueous samples. PCB_1_Conc PCB congener 1; 2-Chlorobiphenyl concentration expressed in nanograms per gram of dry weight or in nanograms per liter. USGS Defined 0.271246 16.739984 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_1_QA Quality assurance check for PCB congener 1; 2-Chlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined R Results for this compound are rejected due to serious deficiencies in the ability to analyze the sample and meet quality-control criteria; Presence or absence cannot be verified. USGS Defined PCB_3_Conc PCB congener 3; 4-Chlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.084724 19.667465 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_3_QA Quality assurance check for PCB congener 3; 4-Chlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined R Results for this compound are rejected due to serious deficiencies in the ability to analyze the sample and meet quality-control criteria; Presence or absence cannot be verified. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined PCB_4_10_Conc PCB congeners 4 and 10; 2,2'-Dichlorobiphenyl and 2,6-Dichlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.052364 34.160555 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_4_10_QA Quality assurance check for PCB congeners 4 and 10; 2,2'-Dichlorobiphenyl and 2,6-Dichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined H Relevant calibration check recovery > 130%; Value may be biased high. USGS Defined UH Measured value below calibration limit; Value represents lower LOQ for specific sample; Relevant calibration check recovery > 130%; Value may be biased high. Relevant calibration check recovery > 130%; Value may be biased high. USGS Defined EH Measured value above calibration limit; Estimated value. Relevant calibration check recovery > 130%; Value may be biased high. USGS Defined PCB_7_9_Conc PCB congeners 7 and 9; 2,4-Dichlorobiphenyl and 2,5-Dichlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.005171 0.804973 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_7_9_QA Quality assurance check for PCB congeners 7 and 9; 2,4-Dichlorobiphenyl and 2,5-Dichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined PCB_6_Conc PCB congener 6; 2,3'-Dichlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.008733 0.714752 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_6_QA Quality assurance check for PCB congener 6; 2,3'-Dichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_8_5_Conc PCB congeners 8 and 5; 2,4'-Dichlorobiphenyl and 2,3-Dichlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.061959 23.533061 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_8_5_QA Quality assurance check for PCB congeners 8 and 5; 2,4'-Dichlorobiphenyl and 2,3-Dichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined PCB_19_Conc PCB congener 19;2,2',6-Trichlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.002114 0.444055 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_19_QA Quality assurance check for PCB congener 19;2,2',6-Trichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined B Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined PCB_12_13_Conc PCB congeners 12 and 13; 3,4-Dichlorobiphenyl and 3,4'-Dichlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.000970 2.415317 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_12_13_QA Quality assurance check for PCB congeners 12 and 13; 3,4-Dichlorobiphenyl and 3,4'-Dichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined B Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined PCB_18_Conc PCB congener 18; 2,2',5-Trichlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.01018 1.842972 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_18_QA Quality assurance check for PCB congener 18; 2,2',5-Trichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined PCB_17_15_Conc PCB congeners 17 and 15; 2,2',4-Trichlorobiphenyl and 4,4'-Dichlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter or nanograms per liter. USGS Defined 0.008814 0.626136 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_17_15_QA Quality assurance check for PCB congeners 17 and 15; 2,2',4-Trichlorobiphenyl and 4,4'-Dichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined PCB_24_27_Conc PCB congeners 24 and 27; 2,3,6-Trichlorobiphenyl and 2,3',6-Trichlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.033454 0.043931 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_24_27_QA Quality assurance check for PCB congeners 24 and 27; 2,3,6-Trichlorobiphenyl and 2,3',6-Trichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_16_32_Conc PCB congeners 16 and 32; 2,2',3-Trichlorobiphenyl and 2,4',6-Trichlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.01316 2.481488 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_16_32_QA Quality assurance check for PCB congeners 16 and 32; 2,2',3-Trichlorobiphenyl and 2,4',6-Trichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined PCB_26_Conc PCB congener 26; 2,3',5-Trichlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.001398 5.169795 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_26_QA Quality assurance check for PCB congener 26; 2,3',5-Trichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_25_Conc PCB congener 25; 2,3',4-Trichlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.000255 0.246407 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_25_QA Quality assurance check for PCB congener 25; 2,3',4-Trichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined B Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_31_Conc PCB congener 31; 2,4',5-Trichlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.004526 8.25393 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_31_QA Quality assurance check for PCB congener 31; 2,4',5-Trichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_28_Conc PCB congener 28; 2,4,4'-Trichlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.003642 4.082863 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_28_QA Quality assurance check for PCB congener 28; 2,4,4'-Trichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined PCB_21_33_53_Conc PCB congeners 21, 33 and 53; 2,3,4-Trichlorobiphenyl, 2,3',4'-Trichlorobiphenyl and 2,2',5,6'-Tetrachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.004419 7.312932 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_21_33_53_QA Quality assurance check for PCB congeners 21, 33 and 53; 2,3,4-Trichlorobiphenyl, 2,3',4'-Trichlorobiphenyl and 2,2',5,6'-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined PCB_51_Conc PCB congener 51; 2,2',4,6'-Tetrachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.000262 1.812324 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_51_QA Quality assurance check for PCB congener 51; 2,2',4,6'-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined ES Measured value above calibration limit; Estimated value. Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample; Surrogate recovery < 70%; Value may be biased low. USGS Defined EB Measured value above calibration limit; Estimated value. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined PCB_22_Conc PCB congener 22; 2,3,4'-Trichlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.003189 1.148041 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_22_QA Quality assurance check for PCB congener 22; 2,3,4'-Trichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_45_Conc PCB congener 45; 2,2',3,6-Tetrachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.001085 0.89314 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_45_QA Quality assurance check for PCB congener 45; 2,2',3,6-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample; Surrogate recovery < 70%; Value may be biased low. USGS Defined PCB_46_Conc PCB congener 46; 2,2',3,6'-Tetrachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.050488 0.321942 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_46_QA Quality assurance check for PCB congener 46; 2,2',3,6'-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_52_43_Conc PCB congeners 52 and 43; 2,2',5,5'-Tetrachlorobiphenyl and 2,2',3,5-Tetrachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.002469 5.101565 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_52_43_QA Quality assurance check for PCB congeners 52 and 43; 2,2',5,5'-Tetrachlorobiphenyl and 2,2',3,5-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined PCB_49_Conc PCB congener 49; 2,2',4,5'-Tetrachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.001212 9.610363 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_49_QA Quality assurance check for PCB congener 49; 2,2',4,5'-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_47_Conc PCB congener 47; 2,2',4,4'-Tetrachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.000526 3.632487 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_47_QA Quality assurance check for PCB congener 47; 2,2',4,4'-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined PCB_48_Conc PCB congener 48; 2,2',4,5-Tetrachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.000637 3.295687 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_48_QA Quality assurance check for PCB congener 48; 2,2',4,5-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined PCB_44_Conc PCB congener 44; 2,2',3,5'-Tetrachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.002993 1.233102 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_44_QA Quality assurance check for PCB congener 44; 2,2',3,5'-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined PCB_37_Conc PCB congener 37; 3,4,4'-Trichlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.000674 2.404971 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_37_QA Quality assurance check for PCB congener 37; 3,4,4'-Trichlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_42_Conc PCB congener 42; 2,2',3,4'-Tetrachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.001069 0.990208 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_42_QA Quality assurance check for PCB congener 42; 2,2',3,4'-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_41_71_Conc PCB congeners 41 and 71; 2,2',3,4-Tetrachlorobiphenyl and 2,3',4',6-Tetrachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.001703 1.471239 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_41_71_QA Quality assurance check for PCB congeners 41 and 71; 2,2',3,4-Tetrachlorobiphenyl and 2,3',4',6-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined PCB_64_Conc PCB congener 64; 2,3,4',6-Tetrachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.000729 0.648447 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_64_QA Quality assurance check for PCB congener 64; 2,3,4',6-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined PCB_40_Conc PCB congener 40; 2,2',3,3'-Tetrachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined 0.000855 9.44344 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_40_QA Quality assurance check for PCB congener 40; 2,2',3,3'-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined PCB_100_Conc PCB congener 100; 2,2',4,4',6-Pentachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000076 1.089864 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_100_QA Quality assurance check for PCB congener 100; 2,2',4,4',6-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined UB Measured value below calibration limit; Value represents lower LOQ for specific sample. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined BS Detection in trip/method/equipment blank; Value may be affected by contamination. Surrogate recovery < 70%; Value may be biased low. USGS Defined EB Measured value above calibration limit; Estimated value. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined HE Relevant calibration check recovery > 130%; Value may be biased high. Measured value above calibration limit; Estimated value. USGS Defined PCB_63_Conc PCB congener 63; 2,3,4',5-Tetrachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000135 1.494934 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_63_QA Quality assurance check for PCB congener 63; 2,3,4',5-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_74_Conc PCB congener 74; 2,4,4',5-Tetrachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.312346 9.120595 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_74_QA Quality assurance check for PCB congener 74; 2,4,4',5-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_70_76_Conc PCB congeners 70 and 76; 2,3',4',5-Tetrachlorobiphenyl and 2,3',4',5'-Tetrachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000926 1.307428 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_70_76_QA Quality assurance check for PCB congeners 70 and 76; 2,3',4',5-Tetrachlorobiphenyl and 2,3',4',5'-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_66_95_Conc PCB congeners 66 and 95; 2,3',4,4'-Tetrachlorobiphenyl and 2,2',3,5',6-Pentachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.001723 9.235698 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_66_95_QA Quality assurance check for PCB congeners 66 and 95; 2,3',4,4'-Tetrachlorobiphenyl and 2,2',3,5',6-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_91_Conc PCB congener 91; 2,2',3,4',6-Pentachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000317 3.556579 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_91_QA Quality assurance check for PCB congener 91; 2,2',3,4',6-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_56_60_Conc PCB congeners 56 and 60; 2,3,3',4'-Tetrachlorobiphenyl and 2,3,4,4'-Tetrachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000986 2.573036 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_56_60_QA Quality assurance check for PCB congeners 56 and 60; 2,3,3',4'-Tetrachlorobiphenyl and 2,3,4,4'-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_92_84_89_Conc PCB congeners 92, 84 and 89; 2,2',3,5,5'-Pentachlorobiphenyl, 2,2',3,3',6-Pentachlorobiphenyl and 2,2',3,4,6'-Pentachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000388 19.087804 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_92_84_89_QA Quality assurance check for PCB congeners 92, 84 and 89; 2,2',3,5,5'-Pentachlorobiphenyl, 2,2',3,3',6-Pentachlorobiphenyl and 2,2',3,4,6'-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_101_Conc PCB congener 101 ; 2,2',4,5,5'-Pentachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000298 7.478131 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_101_QA Quality assurance check for PCB congener 101; 2,2',4,5,5'-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_99_Conc PCB congener 99; 2,2',4,4',5-Pentachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000143 5.385386 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_99_QA Quality assurance check for PCB congener 99; 2,2',4,4',5-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_83_Conc PCB congener 83; 2,2',3,3',5-Pentachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000143 1.375892 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_83_QA Quality assurance check for PCB congener 83; 2,2',3,3',5-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_97_Conc PCB congener 97; 2,2',3,4',5'-Pentachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000235 1.574998 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_97_QA Quality assurance check for PCB congener 97; 2,2',3,4',5'-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_81_87_Conc PCB congeners 81 and 87; 3,4,4',5-Tetrachlorobiphenyl and 2,2',3,4,5'-Pentachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000508 5.508887 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_81_87_QA Quality assurance check for PCB congeners 81 and 87; 3,4,4',5-Tetrachlorobiphenyl and 2,2',3,4,5'-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_85_Conc PCB congener 85; 2,2',3,4,4'-Pentachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000132 3.196504 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_85_QA Quality assurance check for PCB congener 85; 2,2',3,4,4'-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_136_Conc PCB congener 136; 2,2',3,3',6,6'-Hexachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000201 7.497751 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_136_QA Quality assurance check for PCB congener 136; 2,2',3,3',6,6'-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_110_77_Conc PCB congeners 110 and 77; 2,3,3',4',6-Pentachlorobiphenyl and 3,3',4,4'-Tetrachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.002680 9.958579 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_110_77_QA Quality assurance check for PCB congeners 110 and 77; 2,3,3',4',6-Pentachlorobiphenyl and 3,3',4,4'-Tetrachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_82_151_Conc PCB congeners 82 and 151; 2,2',3,3',4-Pentachlorobiphenyl and 2,2',3,5,5',6-Hexachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000587 14.745464 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_82_151_QA Quality assurance check for PCB congeners 82 and 151; 2,2',3,3',4-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_135_144_Conc PCB congeners 135 and 144; 2,2',3,3',5,6'-Hexachlorobiphenyl and 2,2',3,4,5',6-Hexachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000078 2.229211 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_135_144_QA Quality assurance check for PCB congeners 135 and 144; 2,2',3,3',5,6'-Hexachlorobiphenyl and 2,2',3,4,5',6-Hexachlorobipheny. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_107_Conc PCB congener 107; 2,3,3',4',5-Pentachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000010 0.909323 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_107_QA Quality assurance check for PCB congener 107; 2,3,3',4',5-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_149_123_Conc PCB congeners 149 and 123; 2,2',3,4',5',6-Hexachlorobiphenyl and 2,3',4,4',5'-Pentachlorobiphenyl combined concentrations expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000097 6.535591 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_149_123_QA Quality assurance check for PCB congener 149 and 123; 2,2',3,4',5',6-Hexachlorobiphenyl and 2,3',4,4',5'-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_118_Conc PCB congener 118; 2,3',4,4',5-Pentachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000257 6.126348 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_118_QA Quality assurance check for PCB congener 118; 2,3',4,4',5-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_134_Conc PCB congener 134; 2,2',3,3',5,6-Hexachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000008 0.723400 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_134_QA Quality assurance check for PCB congener 134; 2,2',3,3',5,6-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined UB Measured value below calibration limit; Value represents lower LOQ for specific sample. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined H Relevant calibration check recovery > 130%; Value may be biased high. USGS Defined HE Detection in trip/method/equipment blank; Value may be affected by contamination. Measured value above calibration limit; Estimated value. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_114_131_Conc PCB congeners 114 and 131; 2,3,4,4',5-Pentachlorobiphenyl and 2,2',3,3',4,6-Hexachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000019 1.403649 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_114_131_QA Quality assurance check for PCB congeners 114 and 131; 2,3,4,4',5-Pentachlorobiphenyl and 2,2',3,3',4,6-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined HB Relevant calibration check recovery > 130%; Value may be biased high. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined EHB Measured value above calibration limit; Estimated value. Relevant calibration check recovery > 130%; Value may be biased high. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined UHB Measured value below calibration limit; Value represents lower LOQ for specific sample. Relevant calibration check recovery > 130%; Value may be biased high. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined UL Measured value below calibration limit; Value represents lower LOQ for specific sample. Relevant calibration check recovery < 70%; Value may be biased low. USGS Defined L Relevant calibration check recovery < 70%; Value may be biased low. USGS Defined LS Relevant calibration check recovery < 70%; Value may be biased low. Surrogate recovery < 70%; Value may be biased low. USGS Defined HEB Relevant calibration check recovery > 130%; Value may be biased high. ; Measured value above calibration limit; Estimated value. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined H Relevant calibration check recovery > 130%; Value may be biased high. USGS Defined LE Relevant calibration check recovery < 70%; Value may be biased low. Measured value above calibration limit; Estimated value. USGS Defined PCB_146_Conc PCB congener 146; 2,2',3,4',5,5'-Hexachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000083 2.274264 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_146_QA Quality assurance check for PCB congener 146; 2,2',3,4',5,5'-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined B Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_153_Conc PCB congener 153; 2,2',4,4',5,5'-Hexachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000708 7.392104 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_153_QA Quality assurance check for PCB congener 153; 2,2',4,4',5,5'-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined B Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_132_Conc PCB congener 132; 2,2',3,3',4,6'-Hexachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000129 4.101976 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_132_QA Quality assurance check for PCB congener 132; 2,2',3,3',4,6'-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_105_Conc PCB congener 105; 2,3,3',4,4'-Pentachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000010 0.299908 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_105_QA Quality assurance check for PCB congener 105; 2,3,3',4,4'-Pentachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_141_Conc PCB congener 141; 2,2',3,4,5,5'-Hexachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000102 1.087120 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_141_QA Quality assurance check for PCB congener 141; 2,2',3,4,5,5'-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_137_176_130_Conc PCB congeners 137, 176 and 130; 2,2',3,4,4',5-Hexachlorobiphenyl, 2,2',3,3',4,6,6'-Heptachlorobiphenyl and 2,2',3,3',4,5'-Hexachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. USGS defined 0.000018 0.685081 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_137_176_130_QA Quality assurance check for PCB congener 137; 2,2',3,4,4',5-Hexachlorobiphenyl, 2,2',3,3',4,6,6'-Heptachlorobiphenyl and 2,2',3,3',4,5'-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_163_138_Conc PCB congeners 163 and 138; 2,3,3',4',5,6-Hexachlorobiphenyl and 2,2',3,4,4',5'-Hexachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000192 13.148039 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_163_138_QA Quality assurance check for PCB congeners 163 and 138; 2,3,3',4',5,6-Hexachlorobiphenyl and 2,2',3,4,4',5'-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_158_Conc PCB congener 158; 2,3,3',4,4',6-Hexachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000018 2.497004 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_158_QA Quality assurance check for PCB congener 158; 2,3,3',4,4',6-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined B Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined PCB_178_129_Conc PCB congener 178 and 129; 2,2',3,3',5,5',6-Heptachlorobiphenyl and 2,2',3,3',4,5-Hexachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000044 3.189887 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_178_129_QA Quality assurance check for PCB congeners 178 and 129; 2,2',3,3',5,5',6-Heptachlorobiphenyl and 2,2',3,3',4,5-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_175_Conc PCB congener 175; 2,2',3,3'4,5',6-Heptachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000010 0.129602 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_175_QA Quality assurance check for PCB congener 175; 2,2',3,3'4,5',6-Heptachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined B Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_187_182_Conc PCB congeners 187 and 182; 2,2',3,4',5,5',6-Heptachlorobiphenyl and 2,2',3,4,4',5,6'-Heptachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000091 2.756467 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_187_182_QA Quality assurance check for PCB congeners 187 and 182; 2,2',3,4',5,5',6-Heptachlorobiphenyl and 2,2',3,4,4',5,6'-Heptachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_183_Conc PCB congener 183; 2,2',3,4,4',5',6-Heptachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported. Producer defined 0.000042 1.916794 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_183_QA Quality assurance check for PCB congener 183; 2,2',3,4,4',5',6-Heptachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_128_Conc PCB congener 128; 2,2',3,3',4,4'-Hexachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000129 1.004722 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_128_QA Quality assurance check for PCB congener 128; 2,2',3,3',4,4'-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined EB Measured value above calibration limit; Estimated value. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined L Relevant calibration check recovery < 70%; Value may be biased low. USGS Defined LE Relevant calibration check recovery < 70%; Value may be biased low. Measured value above calibration limit; Estimated value. USGS Defined PCB_185_Conc PCB congener 185; 2,2',3,4,5,5',6-Heptachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000013 0.324623 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_185_QA Quality assurance check for PCB congener 185; 2,2',3,4,5,5',6-Heptachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_174_Conc PCB congener 174; 2,2',3,3',4,5,6'-Heptachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000088 2.874774 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_174_QA Quality assurance check for PCB congener 174; 2,2',3,3',4,5,6'-Heptachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_177_Conc PCB congener 177; 2,2',3,3',4,5',6'-Heptachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000053 2.140744 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_177_QA Quality assurance check for PCB congener 177; 2,2',3,3',4,5',6'-Heptachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_202_171_156_Conc PCB congeners 202, 171 and 156; 2,2',3,3',5,5',6,6'-Octachlorobiphenyl, 2,2',3,3',4,4',6-Heptachlorobiphenyl and 2,3,3',4,4',5-Hexachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000019 0.434597 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_202_171_156_QA Quality assurance check for PCB congeners 202, 171 and 156; 2,2',3,3',5,5',6,6'-Octachlorobiphenyl, 2,2',3,3',4,4',6-Heptachlorobiphenyl and 2,3,3',4,4',5-Hexachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined PCB_157_200_Conc PCB congeners 157 and 200; 2,3,3',4,4',5'-Hexachlorobiphenyl and 2,2',3,3',4,5,6,6'-Octachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000011 3.872505 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_157_200_QA Quality assurance check for PCB congeners 157 and 200; 2,3,3',4,4',5'-Hexachlorobiphenyl and 2,2',3,3',4,5,6,6'-Octachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined E Measured value above calibration limit; Estimated value. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_172_197_Conc PCB congeners 172 and 197; 2,2',3,3',4,5,5'-Heptachlorobiphenyl and 2,2',3,3',4,4',6,6'-Octachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.114971 0.906264 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_172_197_QA Quality assurance check for PCB congeners 172 and 197; 2,2',3,3',4,5,5'-Heptachlorobiphenyl and 2,2',3,3',4,4',6,6'-Octachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_180_Conc PCB congener 180; 2,2',3,4,4',5,5'-Heptachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000101 6.731114 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_180_QA Quality assurance check for PCB congener 180; 2,2',3,4,4',5,5'-Heptachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_193_Conc PCB congener 193; 2,3,3',4',5,5',6-Heptachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.053833 0.070693 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_193_QA Quality assurance check for PCB congener 193; 2,3,3',4',5,5',6-Heptachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_191_Conc PCB congener 191; 2,3,3',4,4',5',6-Heptachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.019737 0.207702 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_191_QA Quality assurance check for PCB congener 191; 2,3,3',4,4',5',6-Heptachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined H Relevant calibration check recovery > 130%; Value may be biased high. USGS Defined UH Measured value below calibration limit; Value represents lower LOQ for specific sample. Relevant calibration check recovery > 130%; Value may be biased high. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined B Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined UB Measured value below calibration limit; Value represents lower LOQ for specific sample. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined BS Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_199_Conc PCB congener 199; 2,2',3,3',4,5,5',6'-Octachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000012 0.191543 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_199_QA Quality assurance check for PCB congener 199; 2,2',3,3',4,5,5',6'-Octachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_170_190_Conc PCB congeners 170 and 190; 2,2',3,3',4,4',5-Heptachlorobiphenyl and 2,3,3',4,4',5,6-Heptachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.000035 3.019792 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_170_190_QA Quality assurance check for PCB congeners 170 and 190; 2,2',3,3',4,4',5-Heptachlorobiphenyl and 2,3,3',4,4',5,6-Heptachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_198_Conc PCB congener 198; 2,2',3,3',4,5,5',6-Octachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.015381 0.156059 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_198_QA Quality assurance check for PCB congener 198; 2,2',3,3',4,5,5',6-Octachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_201_Conc PCB congener 201; 2,2',3,3',4,5',6,6'-Octachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.538333 3.019215 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_201_QA Quality assurance check for PCB congener 201; 2,2',3,3',4,5',6,6'-Octachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_203_196_Conc PCB congeners 203 and 196; 2,2',3,4,4',5,5',6-Octachlorobiphenyl and 2,2',3,3',4,4',5,6'-Octachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.551022 2.651109 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_203_196_QA Quality assurance check for PCB congeners 203 and 196; 2,2',3,4,4',5,5',6-Octachlorobiphenyl and 2,2',3,3',4,4',5,6'-Octachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_208_195_Conc PCB congeners 208 and 195; 2,2',3,3',4,5,5',6,6'-Nonachlorobiphenyl and 2,2',3,3',4,4',5,6-Octachlorobiphenyl combined concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.102514 0.498903 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_208_195_QA Quality assurance check for PCB congeners 208 and 195; 2,2',3,3',4,5,5',6,6'-Nonachlorobiphenyl and 2,2',3,3',4,4',5,6-Octachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_207_Conc PCB 207;2,2',3,3',4,4',5,6,6'-Nonachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.014803 0.069439 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_207_QA Quality assurance check for PCB 207;2,2',3,3',4,4',5,6,6'-Nonachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined UB Measured value below calibration limit; Value represents lower LOQ for specific sample. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined B Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined S Surrogate recovery < 70%; Value may be biased low. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_194_Conc PCB congener 194; 2,2',3,3',4,4',5,5'-Octachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.296062 11.509573 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_194_QA Quality assurance check for PCB congener 194; 2,2',3,3',4,4',5,5'-Octachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined UL Measured value below calibration limit; Value represents lower LOQ for specific sample. Relevant calibration check recovery < 70%; Value may be biased low. USGS Defined LS Relevant calibration check recovery < 70%; Value may be biased low. Surrogate recovery < 70%; Value may be biased low. USGS Defined L Relevant calibration check recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_205_Conc PCB congener 205; 2,3,3',4,4',5,5',6-Octachlorobipheny concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.012689 0.701860 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_205_QA Quality assurance check for PCB congener 205; 2,3,3',4,4',5,5',6-Octachlorobipheny. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined UL Measured value below calibration limit; Value represents lower LOQ for specific sample. Relevant calibration check recovery < 70%; Value may be biased low. USGS Defined ULS Measured value below calibration limit; Value represents lower LOQ for specific sample. Relevant calibration check recovery < 70%; Value may be biased low. Surrogate recovery < 70%; Value may be biased low. USGS Defined L Relevant calibration check recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_206_Conc PCB congener 206; 2,2',3,3',4,4',5,5',6-Nonachlorobiphenyl oncentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.087287 0.775238 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_206_QA Quality assurance check for PCB congener 206; 2,2',3,3',4,4',5,5',6-Nonachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined - Qualifier does not apply; Reported value is the concentration. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined UL Measured value below calibration limit; Value represents lower LOQ for specific sample. Relevant calibration check recovery < 70%; Value may be biased low. USGS Defined ULS Measured value below calibration limit; Value represents lower LOQ for specific sample. Relevant calibration check recovery < 70%; Value may be biased low. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined PCB_209_Conc PCB congener 209; Decachlorobiphenyl concentration expressed in nanograms per gram of dry weight or nanograms per liter. USGS Defined - Value not reported.. USGS defined 0.001974 0.121053 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PCB_209_QA Quality assurance check for PCB congener 209; Decachlorobiphenyl. Concentrations associated with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. USGS Defined UHB Measured value below calibration limit; Value represents lower LOQ for specific sample. Relevant calibration check recovery > 130%; Value may be biased high. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined UH Measured value below calibration limit; Value represents lower LOQ for specific sample. Relevant calibration check recovery > 130%; Value may be biased high. USGS Defined H Relevant calibration check recovery > 130%; Value may be biased high. USGS Defined UL Measured value below calibration limit; Value represents lower LOQ for specific sample. Relevant calibration check recovery < 70%; Value may be biased low. USGS Defined ELS Measured value above calibration limit; Estimated value. Relevant calibration check recovery < 70%; Value may be biased low. Surrogate recovery < 70%; Value may be biased low. USGS Defined EL Measured value above calibration limit; Estimated value. Relevant calibration check recovery < 70%; Value may be biased low. USGS Defined ELB Measured value above calibration limit; Estimated value. Relevant calibration check recovery < 70%; Value may be biased low. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined U Measured value below calibration limit; Value represents lower LOQ for specific sample. USGS Defined UB Measured value below calibration limit; Value represents lower LOQ for specific sample. Detection in trip/method/equipment blank; Value may be affected by contamination. USGS Defined US Measured value below calibration limit; Value represents lower LOQ for specific sample. Surrogate recovery < 70%; Value may be biased low. USGS Defined N Limitations in passive sampler calibration/equilibration; Value not reported. USGS Defined Patapsco_PotomacWWTP_PFAS_Data.csv Comma Separated Value (CSV) file containing PFAS concentrations and associated quality control information in aqueous influent , effluent, blank samples, and biosolid samples collected from wastewater treatment plants within the Patapsco and Potomac watersheds, December 2021 through March 2023. UMBC Defined Sample_ID USGS generated unique sample identifier. USGS Defined Each sample was given a unique sequential number by the USGS that corresponds with the sample name for each specific site. Sample_Name Origin of wastewater or biosolids sample. USGS Defined Each site was given a unique name identifier. Collection_Date Date when the sample was collected from the site. USGS Defined 12/20/2021 3/23/2023 Watershed Watershed in which the site is located. USGS Defined Patapsco Affected watershed USGS Defined Potomac Affected watershed USGS Defined Sample_Type Sample source type USGS Defined Trip Blank AQ Deionized water sample collected in the laboratory. USGS Defined Equipment Blank AQ Deionized water sample collected in the field. USGS Defined Effluent Water discharged into a waterway after the wastewater treatment process. USGS Defined Influent Untreated wastewater or raw sewage entering the wastewater treatment plant. USGS Defined Trip Blank BS Clean sand sample collected in the laboratory. USGS Defined Equipment Blank BS Clean sand sample collected in the field. USGS Defined Biosolids Dewatered and treated solid residuals of the wastewater treatment plant. USGS Defined Concentration_Units PFAS compound concentration units are in nanograms per gram of dry weight for biosolids (BS) samples and nanograms per liter for aqueous (AQ) samples. USGS Defined PFAS compound concentration units are in nanograms per gram of dry weight for biosolids (BS) samples and nanograms per liter for aqueous (AQ) samples. PFBA_Conc Perfluorobutanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 70.8 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFBA_QA Quality assurance check for perfluorobutanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined UB Associated concentration is less than the LOD and reported as the LOD. Compound present in lab, trip, or equipment blank; Blank is above the LOD. UMBC Defined B Compound present in lab, trip, or equipment blank; Blank is above the LOD. UMBC Defined PFBA_SD Perfluorobutanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 10.8 Calculated standard deviation value. PFPeA_Conc Perfluoropentanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 86.7 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFPeA_QA Quality assurance check for perfluoropentanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined UB Associated concentration is less than the LOD and reported as the LOD. Compound present in lab, trip, or equipment blank; Blank is above the LOD. UMBC Defined B Compound present in lab, trip, or equipment blank; Blank is above the LOD. UMBC Defined PFPeA_SD Perfluoropentanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 8.3 Calculated standard deviation value. PFBS_Conc Perfluorobutane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 26.0 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFBS_QA Quality assurance check for perfluorobutane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFBS_SD Perfluorobutane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 3.6 Calculated standard deviation value. 4_2FTS_Conc 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.1 4.9 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). 4_2FTS_QA Quality assurance check for 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined 4_2FTS_SD 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 1 Calculated standard deviation value.. PFHxA_Conc Perfluorohexanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.1 101.0 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFHxA_QA Quality assurance check for perfluorohexanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined UB Associated concentration is less than the LOD and reported as the LOD. Compound present in lab, trip, or equipment blank; Blank is above the LOD. UMBC Defined B Compound present in lab, trip, or equipment blank; Blank is above the LOD. UMBC Defined PFHxA_SD Perfluorohexanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 19.9 Calculated standard deviation value. PFPeS_Conc Perfluropentane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.1 10.7 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFPeS_QA Quality assurance check for perfluropentane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFPeS_SD Perfluropentane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 7.2 Calculated standard deviation value. HFPO_DA_Conc Hexafluoropropylene oxide dimer acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.4 54.0 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). HFPO_DA_QA Quality assurance check for hexafluoropropylene oxide dimer acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined HFPO_DA_SD Hexafluoropropylene oxide dimer acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFHpA_Conc Perfluoroheptanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.1 30.3 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFHpA_QA Quality assurance check for perfluoroheptanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFHpA_SD Perfluoroheptanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 11.3 Calculated standard deviation value. PFHxS_Conc Perfluorohexane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 148.0 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFHxS_QA Quality assurance check for perfluorohexane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFHxS_SD Perfluorohexane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 32.2 Calculated standard deviation value. NaDONA_Conc Sodium dodecafluoro-3H-4, 8-dioxanonanoate concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.1 1.5 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). NaDONA_QA Quality assurance check for sodium dodecafluoro-3H-4, 8-dioxanonanoate. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined NaDONA_SD Sodium dodecafluoro-3H-4, 8-dioxanonanoate standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 0.1 Calculated standard deviation value. PFHpS_Conc Perfluoroheptane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.1 16.6 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFHpS_QA Quality assurance check for perfluoroheptane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFHpS_SD Perfluoroheptane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 2 Calculated standard deviation value. PFOA_Conc Perfluorooctanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.1 20.7 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFOA_QA Quality assurance check for perfluorooctanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFOA_SD Perfluorooctanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 2.8 Calculated standard deviation value. 6_2FTS_Conc 1H,1H,2H,2H-perfluorooctane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 13.7 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). 6_2FTS_QA Quality assurance check for 1H,1H,2H,2H-perfluorooctane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined 6_2FTS_SD 1H,1H,2H,2H-perfluorooctane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 3.7 Calculated standard deviation value. PFOS_Conc Perfluorooctane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.3 112.5 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFOS_QA Quality assurance check for perfluorooctane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFOS_SD Perfluorooctane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 79.5 Calculated standard deviation value. PFNA_Conc Perfluorononanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 5.3 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFNA_QA Quality assurance check for perfluorononanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFNA_SD Perfluorononanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 1.2 Calculated standard deviation value. 9Cl_PF3ONS_Conc 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.1 4.0 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). 9Cl_PF3ONS_QA Quality assurance check for 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined 9Cl_PF3ONS_SD 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFNS_Conc Perfluorononane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 11.1 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFNS_QA Quality assurance check for perfluorononane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFNS_SD Perfluorononane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFDA_Conc Perfluorodecanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.1 21.2 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFDA_QA Quality assurance check for perfluorodecanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFDA_SD Perfluorodecanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 3.3 Calculated standard deviation value. 8_2FTS_Conc 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 8.9 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). 8_2FTS_QA Quality assurance check for 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined 8_2FTS_SD 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 2 Calculated standard deviation value. N_MeFOSAA_Conc N-methyl perfluorooctanesulfonamidoacetic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 42.6 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). N_MeFOSAA_QA Quality assurance check for N-methyl perfluorooctanesulfonamidoacetic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined N_MeFOSAA_SD N-methyl perfluorooctanesulfonamidoacetic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 56 Calculated standard deviation value. PFDS_Conc Perfluorodecane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 24.0 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFDS_QA Quality assurance check for perfluorodecane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFDS_SD Perfluorodecane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 4.5 Calculated standard deviation value. PFUdA_Conc Perfluoroundecanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.1 28.7 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFUdA_QA Quality assurance check for perfluoroundecanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFUdA_SD Perfluoroundecanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 6.2 Calculated standard deviation value. N_EtFOSAA_Conc N-ethyl perfluorooctanesulfonamidoacetic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.1 81.1 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). N_EtFOSAA_QA Quality assurance check for N-ethyl perfluorooctanesulfonamidoacetic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined N_EtFOSAA_SD N-ethyl perfluorooctanesulfonamidoacetic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 17.9 Calculated standard deviation value. PFOSA_Conc Perfluorooctanesulfonamide concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.5 75.0 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFOSA_QA Quality assurance check for perfluorooctanesulfonamide. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined UB Associated concentration is less than the LOD and reported as the LOD. Compound present in lab, trip, or equipment blank; Blank is above the LOD. UMBC Defined JB Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. Compound present in lab, trip, or equipment blank; Blank is above the LOD. UMBC Defined PFOSA_SD Perfluorooctanesulfonamide standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. 11Cl_PF3OUdS_Conc 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 8.1 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). 11Cl_PF3OUdS_QA Quality assurance check for 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined 11Cl_PF3OUdS_SD 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFDoA_Conc Perfluorododecanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.4 21.5 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFDoA_QA Quality assurance check for perfluorododecanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFDoA_SD Perfluorododecanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 2.6 Calculated standard deviation value. PFTrDA_Conc Perfluorotridecanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.4 15.3 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFTrDA_QA Quality assurance check for perfluorotridecanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFTrDA_SD Perfluorotridecanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 5.2 Calculated standard deviation value. PFTeDA_Conc Perfluorotetradecanoic acid concentration expressed in nanograms per gram of dry weight. UMBC Defined 0.5 28.3 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFTeDA_QA Quality assurance check for perfluorotetradecanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFTeDA_SD Perfluorotetradecanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PatapscoWWTP_TOP_Data.csv Comma Separated Value (CSV) file containing PFAS concentrations by total oxidizable precursor (TOP) assay analysis and associated quality control information in aqueous influent and effluent and biosolids collected from wastewater treatment plants within the Patapsco watershed, March, and September 2022. UMBC Defined Sample_ID USGS generated unique sample identifier. USGS Defined Each sample was given a unique sequential number by the USGS that corresponds with the sample name for each specific site. Sample_Name Origin of wastewater or biosolid samples. USGS Defined Each site was given a unique name identifier. Collection_Date Date when the sample was collected from the site. USGS Defined 3/22/2022 9/22/2022 Watershed Watershed in which the site is located. USGS Defined Patapsco Affected watershed USGS Defined Sample_Type Sample source type USGS Defined Effluent Water discharged into a waterway after the wastewater treatment process. USGS Defined Influent Untreated wastewater or raw sewage entering the wastewater treatment plant. UMBC Defined Biosolids Dewatered and treated solid residuals of the wastewater treatment plant. USGS Defined Concentration_Units PFAS compound concentration units are in nanograms per gram of dry weight for biosolids (BS) samples and nanograms per liter for aqueous (AQ) samples. USGS Defined PFAS concentration units are in nanograms per gram of dry weight for biosolids (BS) samples and nanograms per liter for aqueous (AQ) samples. PFBA_Conc Perfluorobutanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 1.6 36.5 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFBA_QA Quality assurance check for perfluorobutanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined PFBA_SD Perfluorobutanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 8.2 Calculated standard deviation value. PFPeA_Conc Perfluoropentanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 1.6 71.8 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFPeA_QA Quality assurance check for perfluoropentanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined PFPeA_SD Perfluoropentanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 6.9 Calculated standard deviation value. PFBS_Conc Perfluorobutane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.1 10.5 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFBS_QA Quality assurance check for perfluorobutane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFBS_SD Perfluorobutane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 5.5 Calculated standard deviation value. 4_2FTS_Conc 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.3 16.2 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). 4_2FTS_QA Quality assurance check for 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined 4_2FTS_SD 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 3.8 Calculated standard deviation value. PFHxA_Conc Perfluorohexanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 1.2 53.6 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFHxA_QA Quality assurance check for perfluorohexanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFHxA_SD Perfluorohexanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 6.4 Calculated standard deviation value. PFPeS_Conc Perfluropentane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.6 13.0 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFPeS_QA Quality assurance check for perfluropentane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFPeS_SD Perfluropentane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 3.7 Calculated standard deviation value. HFPO_DA_Conc Hexafluoropropylene oxide dimer acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 1.0 3.1 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). HFPO_DA_QA Quality assurance check for hexafluoropropylene oxide dimer acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined HFPO_DA_SD Hexafluoropropylene oxide dimer acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFHpA_Conc Perfluoroheptanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 2.4 24.5 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFHpA_QA Quality assurance check for perfluoroheptanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFHpA_SD Perfluoroheptanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 5 Calculated standard deviation value. PFHxS_Conc Perfluorohexane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.3 12.2 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFHxS_QA Quality assurance check for perfluorohexane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined PFHxS_SD Perfluorohexane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 8.7 Calculated standard deviation value. NaDONA_Conc Sodium dodecafluoro-3H-4, 8-dioxanonanoate concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 1.2 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). NaDONA_QA Quality assurance check for sodium dodecafluoro-3H-4, 8-dioxanonanoate. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined NaDONA_SD Sodium dodecafluoro-3H-4, 8-dioxanonanoate standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFHpS_Conc Perfluoroheptane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.6 2.5 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFHpS_QA Quality assurance check for perfluoroheptane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined PFHpS_SD Perfluoroheptane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFOA_Conc Perfluorooctanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.7 23.7 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFOA_QA Quality assurance check for perfluorooctanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFOA_SD Perfluorooctanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 3.8 Calculated standard deviation value. 6_2FTS_Conc 1H,1H,2H,2H-perfluorooctane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.2 6.4 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). 6_2FTS_QA Quality assurance check for 1H,1H,2H,2H-perfluorooctane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined 6_2FTS_SD 1H,1H,2H,2H-perfluorooctane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 2.4 Calculated standard deviation value. PFOS_Conc Perfluorooctane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 2.5 43.0 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFOS_QA Quality assurance check for perfluorooctane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFOS_SD Perfluorooctane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 8.2 Calculated standard deviation value. PFNA_Conc Perfluorononanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 1.1 5.1 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFNA_QA Quality assurance check for perfluorononanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFNA_SD Perfluorononanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 2 Calculated standard deviation value. 9Cl_PF3ONS_Conc 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.6 4.1 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). 9Cl_PF3ONS_QA Quality assurance check for 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined 9Cl_PF3ONS_SD 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFNS_Conc Perfluorononane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.6 1.5 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFNS_QA Quality assurance check for perfluorononane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFNS_SD Perfluorononane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFDA_Conc Perfluorodecanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 2.3 20.8 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFDA_QA Quality assurance check for perfluorodecanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFDA_SD Perfluorodecanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 3.5 Calculated standard deviation value. 8_2FTS_Conc 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 2.1 7.7 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). 8_2FTS_QA Quality assurance check for 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined 8_2FTS_SD 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. N_MeFOSAA_Conc N-methyl perfluorooctanesulfonamidoacetic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 2.0 2.2 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). N_MeFOSAA_QA Quality assurance check for N-methyl perfluorooctanesulfonamidoacetic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined N_MeFOSAA_SD N-methyl perfluorooctanesulfonamidoacetic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFDS_Conc Perfluorodecane sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.6 1.5 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFDS_QA Quality assurance check for perfluorodecane sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFDS_SD Perfluorodecane sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFUdA_Conc Perfluoroundecanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 1.2 7.0 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFUdA_QA Quality assurance check for perfluoroundecanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFUdA_SD Perfluoroundecanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 3.4 Calculated standard deviation value. N_EtFOSAA_Conc N-ethyl perfluorooctanesulfonamidoacetic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 2.0 2.2 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). N_EtFOSAA_QA Quality assurance check for N-ethyl perfluorooctanesulfonamidoacetic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined N_EtFOSAA_SD N-ethyl perfluorooctanesulfonamidoacetic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFOSA_Conc Perfluorooctanesulfonamide concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.8 1.0 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFOSA_QA Quality assurance check for perfluorooctanesulfonamide. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined PFOSA_SD Perfluorooctanesulfonamide standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. 11Cl_PF3OUdS_Conc 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.7 4.2 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). 11Cl_PF3OUdS_QA Quality assurance check for 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined 11Cl_PF3OUdS_SD 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFDoA_Conc Perfluorododecanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.9 5.5 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFDoA_QA Quality assurance check for perfluorododecanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined - Not applicable; No corresponding qualifiers associated with the concentration. UMBC Defined PFDoA_SD Perfluorododecanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - 1.2 Calculated standard deviation value. PFTrDA_Conc Perfluorotridecanoic acid concentration expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined 0.7 2.1 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFTrDA_QA Quality assurance check for perfluorotridecanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFTrDA_SD Perfluorotridecanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. PFTeDA_Conc Perfluorotetradecanoic acid concentration expressed in nanograms per gram of dry weight. UMBC Defined 0.4 1.0 Nanograms per gram of dry weight (BS) or nanograms per liter (AQ). PFTeDA_QA Quality assurance check for perfluorotetradecanoic acid. Concentrations with a qualifier will have one or more letter codes in this field. Absence of qualifiers is also noted. UMBC Defined U Associated concentration is less than the LOD and reported as the LOD. UMBC Defined J Associated concentration is less than the LOQ; The analyte was positively identified, and the concentrations was estimated as the LOQ divided by 2. UMBC Defined PFTeDA_SD Perfluorotetradecanoic acid standard deviation of lab replicate concentrations expressed in nanograms per gram of dry weight or nanograms per liter. UMBC Defined - - Calculated standard deviation value. GS ScienceBase U.S. Geological Survey mailing address

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