What are the National Effluent Limitation Guidelines?
National Effluent Limitation Guidelines are technology-based effluent limitations that establish a minimum standard of performance for certain categories and classes of point sources. These standards are imposed on facilities through NPDES permits. The effluent limitation guideline for feedlots appear at 40 CFR part 412. These guidelines establish a standard of “zero discharge” to the waters of the U.S. for feedlots to which the guidelines apply. In addition, the Feedlot Guidelines allow for the discharge of an overflow from a facility that is properly constructed and maintained to contain all the process wastewater plus the rainfall from a 25-year, 24-hour storm event. For facilities not covered by the Feedlot Effluent Guidelines, requirements are developed on a case-by-case basis using the permit writer’s Best Professional Judgement. For further discussion of National Effluent Limitation Guidelines, see http://es.epa.gov/oeca/strategy.html or 40 CFR part 412.
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