Mining-Association-of-Canada-Guidance-for-Conducting-MDMER-Studies-of-Selenium-in-Fish-Tissue-2023-

Guidance on Conducting Studies of Selenium in Fish Tissue Supporting Requirements of the Metal and Diamond Mining Effluent Regulations Mining Association of Canada Guidance on Studies of Selenium in Fish Tissue under the MDMER Guidance on Conducting Studies of Selenium in Fish Tissue Supporting Requirements of the Metal and Diamond Mining Effluent Regulations ©2023 The Mining Association of Canada. [...] For example, there is no discussion of the possible role of analysis of selenium in fish tissue as part of EEM investigation of cause studies since the Regulations do not define an “effect” with respect to concentrations of selenium in fish tissue, and there are no triggers to conduct investigation of cause studies on the basis of selenium concentrations in fish tissue. [...] 1.3 Basis for the Guidance This guidance document is predicated on the view that, to the extent practicable, sampling of fish tissue for selenium analysis should be aligned with the conduct of fish population studies, including the timing of sample collection and the species/individual fish collected. [...] [Note: the screenshot below is too wide to be displayed in a single line so it is split over two lines.] Additionally, when reporting the results of selenium in tissue within the biological data report in EEMER, owners/operators must identify the trigger that was exceeded to require the selenium in tissue study and the date of the trigger with the concentration of reported. [...] The three options include: • Annual mean concentration of total selenium in the effluent ≥5 µg/L; • Concentration of total selenium in the effluent ≥10 µg/L; or, • The MDL of selenium for the analysis of any effluent sample is equal to or greater than 10 µg/L, or the MDL used in respect of selenium for the analysis of at least two of four effluent samples in a calendar year is equal to or greater.