The criterion level, often abbreviated as Lc, is the steady noise level permitted for a full eight-hour work shift. This is 85 dB(A) in most jurisdictions, but it is 90 dB(A) in Quebec and 87 dB(A) for organizations that follow the Canadian federal noise regulations.
Royal Catchfly (Silene regia) This striking plant may grow as high as five feet, with bright red flowers. It flowers from May through September, and can be seen in remnant prairies and open woods. In Missouri, it is known only in the Ozarks.
Sponsored Topics. Ozark, incorporated in 1890, is a city in Christian County, Missouri, United States. The population was 9,665 at the 2000 census. As of 2009 the population has grown 18,458. It is the county seat of Christian County. Ozark is part of the Springfield, Missouri Metropolitan Statistical Area.