1125.83 RINGELMANN CHART.

"Ringelmann Chart" means a chart originally published in U.S. Bureau of Mines Circular No. 7718 (August, 1955) on which density of equivalent opacity of smoke is illustrated by increasingly dense shades of gray (0 = clear, 5 = opaque).

(Ord. 98-176. Passed 8-3-98.)

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