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.
Ozark PlateauâIntroduction. Download fact sheet on the rocks and minerals of the Ozark Plateau. The Ozark Plateau, as its name suggests, is part of the Ozarks of Missouri, Oklahoma, and Arkansas.Bounded by the Spring River on the west, this corner of southeastern Kansas covers about 55 square miles and includes the towns of Baxter Springs and Galena.zark PlateauâIntroduction. Download fact sheet on the rocks and minerals of the Ozark Plateau. The Ozark Plateau, as its name suggests, is part of the Ozarks of Missouri, Oklahoma, and Arkansas.