Finalization of Research and Preliminary Selenium Soil Quality Guideline Derivation

Anthony Knafla, Equilibrium Environmental Inc.


Selenium is relevant to the oil and gas industry as a potential co-contaminate with salinity and hydrocarbon impacts. Elevated selenium concentrations are also known to occur in disposed drilling waste. Furthermore, selenium is frequently encountered at above guideline concentrations in background areas, complicating the decision making process regarding materials targeted for landfill and disposal. Development of an updated ecocontact selenium soil guideline would benefit industry in terms of reduced remediation costs as well as improved environmental performance, such as through decreased greenhouse gas emissions (by decreased remediation volumes). It would also improve conservation efforts and reduce instances where remediation would generally be required because of guideline exceedances, although the selenium may not pose unacceptable risk to the environment or human health.