按照“最佳控制技术”标准，如果对常规污染物的附加性限制比“最佳实用技术”标准更加严厉，只有在“增加的处理成本相对环境利益的增加而言显得合理”的情况下才可得到实施。

• Under BCT, additional limitations on conventional pollutants that are more stringent than BPT can be imposed only "to the extent that the increased cost of treatment [would] be reasonable in terms of the degree of environmental benefits".