The Massachusetts Department of Environmental Protection is proposing revisions to its regulations for the Stage II Vapor Recovery Program, the Environmental Results Program for perchloroethylene dry cleaning facilities, and the requirements for stationary engines and combustion turbines for combined heat and power projects. The hearings will be held April 30 and May 1, 2008. Comments are due May 12, 2008. http://mass.gov/dep/public/hearings/08erpreg.htm.