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.
part of a series of reports on the Ozark Plateaus study unit. Location The Ozark Plateaus study unit is approximately 48,000 square miles (mi2) and includes parts of north-ern Arkansas, southeastern Kansas, southern Missouri, and northeastern Oklahoma (fig.1). The study unit includes most of the Ozark Plateaus Province and small parts of the Osage Plains section of the Central Low-