No land shall be used or occupied in any district in any manner as to create any dangerous, noxious, injurious, or otherwise objectionable fire, explosion, radioactive or other hazard; noise, or vibration, smoke, dust or other form of air pollution; electrical or other disturbance; glare, liquid or solid, refuse or wastes; conditions conducive to the breeding of insects, rodents, or other substance, conditions or element in a manner or in an amount as to affect adversely the surrounding areas.

However, any use may be undertaken and maintained if it conforms to the various district regulations in substance and intent and to the performance standards listed in this section. These performance standards shall be applied at the property lines in all districts, except as otherwise indicated in the wording of the section. Evidence of existing and designed compliance with the performance standards will be required at the request of the planning board or the city council.

All activities and all storage of flammable and explosive materials, at any point, shall be provided with adequate safety devices against fire and explosion and adequate fire-fighting and fire-suppression devices and equipment.

Cross reference— Fire prevention and protection, ch. 7.

No activities that emit dangerous radioactivity, at any point, no electrical disturbances adversely affecting the operation, at any point, of any equipment, other than that of the creator of such disturbance, shall be permitted.

Cross reference— Health and sanitation, ch. 8.

No emission of visible smoke of a shade darker than No. 1 on the Ringelmann Smoke Chart as published by the U.S. Bureau of Mines shall be permitted.

Cross reference— Health and sanitation, ch. 8.

No emission which can cause any damage to health of animals or vegetation, or which can cause excessive soiling, at any point, and in no event any emission of any solid or liquid particles in concentrations exceeding 0.3 grains per cubic foot of conveying gas or air shall be permitted.

Cross reference— Nuisances, § 8-101 et seq.

No discharge, at any point, into a private sewage system, stream, the ground, or a municipal sewage disposal system of any material in such a way, or of such a nature or temperature as can contaminate any running stream, water supply or otherwise cause the emission of dangerous or objectionable elements and accumulation of wastes conducive to the breeding of rodents or insects shall be permitted.

Cross reference— Solid waste, § 8-81 et seq.

No vibration which is discernible to the human sense of feeling for three minutes or more in any hour between 7:00 a.m. and 7:00 p.m., or for thirty (30) seconds or more in any one (1) hour between 7:00 p.m. and 7:00 a.m. shall be permitted. No vibration at any time shall produce an acceleration of more than 0.1g or shall result in any combination of amplitudes and frequencies beyond the "safe" range of Table 7, U.S. Bureau of Mines Bulletin #442.

Cross reference— Nuisances, § 8-101 et seq.

Maximum permissible sound pressure levels at specified points of measurement for noise radiated continuously from a facility between 10:00 p.m. and 7:00 a.m. shall be as follows:

If this sound is not smooth and continuous, the following corrections should be added to each of the actual decibels levels given:

a.

Daytime operation only .....+5

b.

Noise source operates less than 20% of any hour period .....+5

Cross reference— Nuisances, § 8-101 et seq.

No emission of odor or gases or odoriferous matter in such quantities as to be offensive shall be permitted. Any process which may involve the creation and/or emission of any odors shall be provided with a secondary safeguard system. No objectionable odor greater than that caused by 0.001202 per thousand cubic feet of hydrogen sulfide or any "odor threshold" as defined in table III in chapter 5 of Air Pollution Abatement Manual, copyright 1951, by Manufacturing Chemists Association, Inc., of Washington, D.C. shall be permitted.

Cross reference— Nuisances, § 8-101 et seq.

Lighting for commercial or business properties shall be located and shielded to direct lighting toward the commercial or business property and away from surrounding properties. Glare from any lighting to adjacent or surrounding residential areas shall not be allowed.

An application for a building permit and/or certificate of occupancy for any use in any district determined by either the inspector of buildings or the zoning administrator to be potentially in conflict with the performance standards shall be accompanied by a plan in quadruplicate of the proposed construction or development, including a description of the proposed machinery operations and products and specifications for the mechanisms and techniques to be used in restricting the emission of dangerous and objectionable elements. One (1) copy of said plans and descriptions shall be filed with the inspector of buildings, one (1) with the zoning administrator, one (1) with the planning board and one (1) with the city council. The fee for such applications shall include the cost of the special reports required herein.

The city council, with the advice of the planning board and the zoning administrator, when there is likelihood of reasonable doubt as to conformance, shall refer the application to one (1) or more expert consultants who shall return a report with their findings within thirty (30) days. A copy of such report will be furnished to the applicant.

(Ord. of 6-26-17(2); Ord. of 8-30-21(1))