The Office of Environmental Health Hazard Assessment proposed to amend Cal. Code Regs. tit. 27, §25703(a)(6), Quantitative Risk Assessment. Changes would modify the calculation used to convert estimates of animal cancer potency to estimates of human cancer potency. The deadline for comment is September 12, 2011. http://www.oal.ca.gov/res/docs/pdf/notice/30z-2011.pdf pp. 1210-13.