(A) Any use already established on the effective date of this chapter shall be permitted to be altered, enlarged, expanded or modified, provided that new sources of smoke and/or particulate matter conform to the performance standards established hereinafter for the Zoning District in which such use is located. The total emission particulate matter from all sources within the boundaries of the lot shall not exceed the net amount permitted in the Zoning District in which the use is located after such alteration, enlargement, expansion or modification.
(B) For the purpose of grading the density of smoke, the Ringelmann Chart, published and used by the United States Bureau of Mines, shall be employed. The emission of smoke or particulate matter of a density greater than No. 2 on the Ringelmann Chart is prohibited at all times, except as otherwise provided hereinafter.
(C) The emission from all sources within any lot area of particulate matter containing more than 5% by weight of particles having a particle diameter larger than 44 microns is prohibited.
(D) Dust and other types of air pollution, borne by the wind from such sources as storage areas, yards, roads and so forth within lot boundaries shall 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 hereinafter for the zoning district in which such use shall be located is prohibited. The Ringelmann Chart is adopted by reference and three copies of the Chart are on file in the office of the Town Clerk-Treasurer.
(E) In the Light Industrial (L.I.) Zoning District, the following additional regulations shall apply:
(1) The emission of more than 12 smoke units per stack in any 30 minute period is prohibited, including smoke in excess of Ringelmann No. 2.
However, once during any three hour period, each stack shall be permitted up to 20 smoke units (not to exceed Ringelmann No. 3) in 30 minutes for soot blowing and fire;
(2) The rate of particulate matter emission from all sources within the boundaries of any lot shall not exceed a net figure of one point per acre of lot area during any one hour period after deducting from the gross hourly emission per acre the correction set forth in the following table:
Allowance for Height of Emission*
Height of Emission Correction
Above Grade (Feet) Pounds per Hour
per Acre
50 0.01
100 0.06
150 0.10
200 0.16
300 0.30
400 0.50
*Interpolate for intermediate values not shown in table
(3) Determination of the total net rate of emission of particulate matter within the lot boundaries of any lot shall be made as follows:
(a) Determine the maximum emission in pounds per hour from each source of emission and divide this figure by the number of acres of lot area, thereby obtaining the gross hourly rate of emission in pounds per acre;
(b) From each gross hourly rate of emission derived in the above item, deduct the correction factor (interpolating as required) for height of emission set forth in the table thereby obtaining the net rate of emission in pounds per acre per hour from each source of emission;
(c) Add together the individual net rates of emission derived in the above item to obtain the total net rate of emission from all sources of emission within the boundaries of the lot; such total shall not exceed one pound per acre of lot area during any one hour.
(F) In the General Industrial (G.I.) Zoning District, the following additional regulations shall apply:
(1) The emission of more than 16 smoke units per stack in any 30 minute period is prohibited, including smoke in excess of Ringelmann No. 2. However, once during any two hour period, each stack shall be permitted up to 24 smoke units (not to exceed Ringelmann No. 3) in 30 minutes for soot blowing and fire cleaning.
(2) The rate of particulate matter emission from all sources within the boundaries of any lot shall not exceed a net figure of eight pounds per acre during any one hour after deducting from the gross hourly emission per acre the correction factor set forth in the following table:
Allowance for Height of Emission* | |
Height of Emission Above Grade (Feet) | Correction Pounds per Hour per Acre |
50 | 0.0 |
100 | 0.5 |
150 | 1.5 |
200 | 2.4 |
300 | 4.0 |
*Interpolate for intermediate values not shown in table.
(3) Determination of the total net rate of emission of particulate matter within the boundaries of any lot shall be made as follows:
(a) Determine the maximum emission in pounds per hour from each source of emission and divide this figure by the number of acres of lot area, thereby obtaining the gross hourly rate of emission in pounds per acre;
(b) From each gross hourly rate of emission derived in the above item, deduct the correction factor (interpolating as required) for height of emission set forth in the table, thereby obtaining the net rate of emission in pounds per acre per hour from each source of emission;
(c) Add together the individual net rate of emission derived in the above item to obtain the total net rate of emission from all sources of emission within the boundaries of the lot; such total shall not exceed four pounds per acre of lot area during any one hour.
(Ord. 1995-12, passed 7-6-95)