What are the headworks rule exemptions?
The headworks rule exemptions are a part of the Resource Conservation and Recovery Act (RCRA) rules that define when wastes are considered to be hazardous and, therefore, subject to the more stringent Subtitle C hazardous waste regulations. The exemptions determine when management of hazardous waste mixtures in a wastewater treatment system would result in sludges or effluent discharges that could be safely handled under regulations governing non-hazardous wastes. The headworks rule exemptions are divided into five categories: • Paragraphs (A) and (B) are concerned with concentrations of spent solvents that may be contained in wastewaters when going to treatment, • Paragraph (C) is concerned with certain petroleum wastes, • Paragraph (D) with de minimis quantities of commercial chemical products that are lost to the wastewater treatment system during normal handling operations, • Paragraph (E) with laboratory wastes and/or wastewaters discharged to wastewater treatment, and • Paragraph
