The Massachusetts Department of Environmental Protection (MassDEP) issued a guidance document on its recently revised Solvent Metal Degreasing regulations, 310 Mass. Code Regs. 7.18(30). This guidance allows facilities that use cold cleaning degreasers to use noncompliant solvents purchased by the facility prior to September 6, 2009, until April 1, 2010, and clarifies the relationship of this new volatile organic compounds reasonably available control technology regulation to existing MassDEP Air Quality Plan Approvals. http://www.mass.gov/dep/air/laws/ccractgu.pdf.