EPA grants petition on industrial wastewater biological solids
The Environmental Protection Agency (EPA) granted a petition by a chemical company to exclude or delist up to 3,500 cubic yards of U019 (benzene) and U220 (toluene) industrial wastewater biological solids (IWBS) per year from the list of federal hazardous wastes under the Resource Conservation and Recovery Act (RCRA). The list is found in 40 CFR 261.33.
EPA received six sets of comments on the proposed exclusion. Two were a duplicate. For most of the comments, EPA found that no changes to the proposed exclusion were needed. For one comment, the chemical company focused on the proposed requirement to sample IWBS at a rate of one sample per every ten roll-off boxes. They explained that it is impossible to hold that many bins onsite while awaiting results and requested clarification on how to handle bins pending analysis and successive bins that are filled in the time between sampling of the 10th bin and receipt of sampling results. EPA agreed to extend the mandatory sampling frequency to one sample every 14th bin.
Only states subject to federal RCRA delisting provisions are affected by this final rule. It does not impact states that have authorization to make their own delisting actions. States with dual systems that include federal RCRA requirements and their own are also not impacted.
This rule became effective July 13, 2022. Since the rule decreases rather than increases the current requirements, it is effective immediately upon publication under the Administrative Procedures Act.

















































