The Department of Toxic Substances Control proposed to amend Calif. Code Regs. tit. 22, division 4.5, chapter 14, article 6, pertaining to water quality monitoring for hazardous waste disposal units. The department intends the changes to provide regulatory flexibility in meeting requirements that may not be feasible. The comment period ends September 15, 2010. http://www.oal.ca.gov/res/docs/pdf/notice/31z-2010.pdf pp. 1170-74.