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.
The Ozarks. The Saint Francois Mountains, viewed here from Knob Lick Mountain, are the geologic core of the Ozarks. The Ozarks (also referred to as Ozarks Mountain Country, the Ozark Mountains or the Ozark Plateau) are a physiographic, geologic, and cultural highland region of the central United States.