The Office of Environmental Health Hazard Assessment proposed amendments to 27 Calif. Code Regs. §25705, Specific Regulatory Levels Posing No Significant Risk. Changes would establish a No Significant Risk Level for 4-methylimidazole. The deadline for comment is February 7, 2011. http://www.oal.ca.gov/res/docs/pdf/notice/1z-2011.pdf pp. 14-16.