Subdividers Ordinance

d. Maximum Permitted Steady-State Vibration Displacement Level I* II* Frequency Displacement Displacement (Cycles per Second) (Inches) (Inches)______ 0 through 9 0.0008 0.0004 10 through 19 0.0005 0.0002 20 through 29 0.0003 0.0001 30 through 39 0.0002 0.0001 40 and over 0.0001 0.0001 *Steady-state vibrations, for purposes of this Ordinance, are vibrations that are continuous, or vibrations in discrete impulses more frequent than one hundred (100) per minute. Discrete impulses that do not exceed one hundred (100) per minute, must be considered impact vibrations and must not cause in excess of twice the displacements stipulated. e. Maximum Permitted Impact Vibration Displacement Level I* II** Frequency Displacement Displacement (Cycles per Second) (Inches) (Inches) 0 through 9 0.0016 0.0006 10 through 19 0.0010 0.0003 20 through 29 0.0006 0.0002 30 through 39 0.0004 0.0001 40 and over 0.0002 0.0001 **Impact vibrations, for purposes of this Ordinance, are vibrations that occur in discrete impulses separated by an interval of at least one minute and numbering not more than eight in any twenty-four hour period. 3. Smoke and Particulate Matter Any emission from a lot of particulate matter containing more than 5% by weight of particles having a particle diameter larger than 44 microns is prohibited. Dust and other types of air pollution borne by the wind from such sources as storage areas, yards, and roads within the boundaries of any lot must be kept to a minimum by appropriate landscaping, paving, oiling, or other acceptable means. Emission of particulate matter from such sources in excess of the weight limitations specified herein is prohibited. The emission of smoke or particulate matter of a density or equivalent opacity equal to, or greater than, No. 2 on the Ringelmann Chart is prohibited at all times, except as otherwise provided herein. (The Ringelmann Chart is the chart published by the United States Bureau of Mines). a. Smoke Emission In the I-2 zone, the emission of more than 12 smoke units per stack in any one hour period is prohibited. However, once during any six hour period each stack must be permitted up to 12 additional units in a 15 minute period for soot blowing and fire cleaning. Only during such 15 minute periods must smoke of a density or equivalent opacity equal to, but not exceeding, Ringelmann No. 3 be permitted, and then only for fire cleaning and for not more than four minutes per period. 93 Adopted November 14, 2007