The Environmental Protection Agency (EPA) is today finalizing regulations under the Resource Conservation and Recovery Act (RCRA) that apply to recycling of hazardous secondary materials to make zinc fertilizer products. This final rule establishes a more consistent regulatory framework for this practice, and establishes conditions for excluding hazardous secondary materials that are used to make zinc fertilizers from the regulatory definition of solid waste. The rule also establishes new product specifications for contaminants in zinc fertilizers made from those secondary materials.