§ 36-309. Performance standards.

The following performance standards shall apply to LI districts:

(1)

External areas for storage shall be screened on all sides by an opaque fence of not less than six feet in height.

(2)

When a side or rear lot line abuts or is adjacent to property located within the RA-1 or RA-2 residential districts a berm or buffer yard shall be required in addition to the minimum yard requirements, specific driveways and plantings of which shall be determined through the site plan review process.

(3)

Performance standards for sound, vibration, odor, gasses, glare, heat, light, electromagnetic radiation, smoke, dust, dirt, fly ash, drifted and blown material:

a.

Sound. The intensity level of sounds shall not exceed the following decibel levels when adjacent to the following types of uses:

Decibels (dba)	Adjacent Use	Where Measured
55	Residential dwellings	Common lot line
65	Commercial	Common lot line
70	Industrial and other	Common lot line

 

The sound levels shall be measured with a type of audio output meter approved by the United States Bureau of Standards. Objectionable noises due to intermittence, beat frequency or shrillness shall be muffled so as not to become a nuisance to adjacent uses.

b.

Vibration. All machinery shall be so mounted and operated as to prevent transmission of ground vibration exceeding a displacement of .003 of one inch measured by any lot line of its source.

c.

Odor. The emission of noxious, odorous matter in such quantities as to be readily detectable at any point along lot lines, when diluted in the ratio of one volume of odorous air to four or more volumes of clean air as to produce a public nuisance or hazard beyond lot lines, is prohibited.

d.

Gases. The escape of or emission of any gas which is injurious or destructive or explosive shall be unlawful and may be summarily caused to be abated.

e.

Glare and heat. Any operation producing intense glare or heat shall be performed within an enclosure so as to completely obscure and shield such operation from direct view from any point along the lot line except during the period of construction of the facilities to be used and occupied.

f.

Light. Exterior lighting shall be so installed that the surface of the source of light shall not be visible and shall be so arranged as far as practical to reflect light away from any residential use, and in no case shall more than one footcandle power of light cross a lot line five feet above the ground in a residential district.

g.

Electromagnetic radiation. Applicable rules and regulations of the Federal Communication Commission in regard to propagation of electromagnetic radiation shall be used as standards for this chapter.

h.

Smoke, dust, dirt, fly ash. Any atmospheric discharge requiring a permit from the state department of environmental quality or the federal government shall have the permit as a condition of approval for any use in this district.

i.

Drifted and blown material. The drifting or airborne transmission beyond the lot line of dust, particles or debris from any open stock pile shall be unlawful and may be summarily caused to be abated.

j.

Radioactive materials. Radioactive materials shall not be emitted to exceed quantities established as safe by the United States Bureau of Standards, as amended from time to time.

k.

Other forms of air pollution. It shall be unlawful to discharge into the atmosphere any substance not covered in subsections (3)c., (3)d. and (3)h. of this section and in excess of standards approved by the state department of environmental quality.

l.

Liquid or solid wastes. It shall be unlawful to discharge at any point any materials in such a way or of such nature or temperature as can contaminate any surface waters, land or aquifers, or otherwise cause the emission of dangerous or objectionable elements, except in accord with standards approved by the state department of environmental quality.

m.

Hazardous wastes. Hazardous wastes as defined by the state department of environmental quality shall be disposed of by methods approved by the state department of environmental quality.

(Code 1991, § 19-256; Ord. No. 83, § 13.05, 4-16-1984; Ord. No. 83.4, 2-15-1989)