:The pollutant concentration below which further reduction can not be reliably achieved by the treatment technology in question (Schueler, 2000)<ref>Schueler, T. 2000. Irreducible Pollutant Concentration Discharged from Stormwater Practices. Technical Note #75, In Watershed Protection Techniques. 2(2), 369-372, Centre for Watershed Protection.</ref> | :The pollutant concentration below which further reduction can not be reliably achieved by the treatment technology in question (Schueler, 2000)<ref>Schueler, T. 2000. Irreducible Pollutant Concentration Discharged from Stormwater Practices. Technical Note #75, In Watershed Protection Techniques. 2(2), 369-372, Centre for Watershed Protection.</ref> |