The Department of Environmental Protection promulgated amendments to 310 Mass. Code Regs. 30.000, Hazardous Waste Regulations. The changes clarify the regulatory and permitting requirements for waste oil, used oil fuel, and other regulated recyclable materials. One final change involved the adoption of a federal exclusion for certain medical nitroglycerine wastes. Other revisions were clerical fixes. http://www.mass.gov/dep/recycle/laws/regulati.htm#hw.