The Massachusetts Department of Environmental Protection proposed amendments to 310 Mass. Code Regs. 6.00. The proposed amendments would update the standards for sulfur dioxide, particulate matter, carbon monoxide, ozone, nitrogen dioxide, and lead to match existing NAAQS and update the definitions for monitoring methods promulgated by EPA. A hearing will be held February 25, 2019. Comments are due March 8, 2019. See http://www.sec.state.ma.us/spr/sprpub/012519b.pdf.