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Four Fish kills Spanning 2011 – 2013 in the Red River Watershed Beaver Creek to Lake Texoma, OK
Jones-Lepp, T. Four Fish kills Spanning 2011 – 2013 in the Red River Watershed Beaver Creek to Lake Texoma, OK. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-14/057, 2014.
The primary objective of this report is to present what was detected in water samples from fish kill IV, and relate how these findings impact the conclusions from the earlier fish kills I-III. The second objective is to discuss the sediment samples that were sent. Also attached to this report, is a standard operating procedure (SOP): “Extraction and Detection of Emerging Contaminants using solid-phase extraction and liquid chromatography-ion trap mass spectrometry” (Appendix A). The SOP is provided for Region 6, or OKDEQ, such that they can repeat the experiments that were performed and continue the surveillance of the Red River for possible toxicants.
The USEPA/ORD-National Exposure Research Laboratory-Environmental Sciences Division (USEPA/ORD-NERL-ESD) assisted USEPA Region 6 and the State of Oklahoma Department of Environmental Quality (OKDEQ) in identifying unknown contaminant(s) that were present during four fish kills in the Red River watershed. These environmental samples were unique in that they were collected during the active phase of the fish kills along the Red River (Oklahoma, United States) in 2011, 2012 and 2013. Using liquid chromatography-time-of-flight high-resolution mass spectrometry (LC-TOFMS), LC-Fourier transform mass spectrometry (LC-FTMS) and/or liquid chromatography-ion trap mass spectrometry (LC-ITMS), the conditional assignments of the molecular weights and chemical formulas of the significant unknown contaminants were determined.