14.12.090 Manufacturing uses (Division D).

Chapter 14.12 CONDITIONAL USE REGULATIONS*

All proposed manufacturing uses shall meet the following performance standards:

A. Vibration. No vibration shall be produced which is transmitted through the ground and is discernible without the aid of instruments at any point beyond the lot line; nor shall any vibration produced exceed the following particle velocity levels, measured with a vibration monitor in inches per second at the nearest:

1.	Residential property line	0.02
2.	Non-residential property line	0.10

Vibration emanating from construction activities between seven a.m. and nine p.m. shall be exempt from these regulations.

B. Fire and Explosives. All activities and all storage of flammable and explosive materials shall be provided with adequate safety devices against the hazards of fire and explosion, including adequate firefighting and fire suppression equipment, as prescribed in the standard building code.

C. Noise. All noise shall be muffled so as not to be objectionable due to intermittence, beat frequency or shrillness. In no event shall the sound pressure level of noise radiated continuously from a facility exceed at the lot line the values given in Table 3 in any octave band or frequency. Sound pressure level shall be measured with a sound meter and an octave band analyzer that conforms to specifications published by the American Standards Association.

Table 3

Noise Schedule

Nighttime Schedule

Maximum permissible sound pressure levels at the lot line for noise radiated continuously from a facility between the hours of nine p.m. and seven a.m.

Frequency Band (In Cycles Per Second)	Sound Pressure Levels (In Decibels) At Non Residential Lot Line	Sound Pressure Levels (In Decibels) At Residential Lot Line
20—75	79	65
75—150	60	50
150—300	56	43
300—600	51	38
600—1,200	42	33
1,200—2,400	40	30
2,400—4,800	38	28
4,800—10,000	35	20

Daytime Schedule

Maximum permissible sound pressure levels at the lot line for noise radiated from a facility between the hours of seven a.m. and nine p.m. shall not exceed the limits of the preceding table except as specified and corrected below.

Type of Operation in Character of Noise	Correction in Decibel*
Daytime operation only	Plus 5
Noise source operates less than twenty percent (20%) of any one-hour period	Plus 5
Noise source operates less than five percent of any one-hour period	Plus 10
Noise source operates less than one & of any one-hour period	Plus 15
Noise of impulsive character (hammering, etc.)	Minus 5
Noise of periodic character (hum, speech, etc.)	Minus 5

* Apply to the preceding table one of these corrections only.

Noises emanating from construction activities between seven a.m. and nine p.m. shall be exempt from these requirements.

D. Air Pollution. The emission of visible smoke, dust, dirt, fly ash, particulate matter from any pipes, vents, or other openings, or from any other source into the air, shall comply with the regulations of the South Carolina department of health and environmental control.

E. Odor. There shall be no emission of odorous gases or other odorous matter in such quantities as to be offensive at the property line. Any process, which may involve the creation or emission of any such odor, shall be provided with both a primary and a secondary safeguard system so that control may be maintained in the event of failure of the primary safeguard system.

F. Glare. There shall be no direct or sky reflected glare, whether from floodlights, high temperature processing, combustion, welding or otherwise, so as to be visible in any residence.

G. Fumes and Vapors. There shall be no emission of any fumes or vapors of a noxious, toxic or corrosive nature, which can cause damage or irritation to health, animals, vegetation, or to any form of property.

H. Heat, Cold, Dampness or Movement of Air. Activities which could product any adverse affect on the temperature, motion or humidity of the atmosphere beyond the lot line shall not be permitted.

I. Toxic Matter. The applicant of a permit for any facility which would utilize toxic matter in the process of manufacturing, fabricating, assembling, packaging, or any related activity, shall provide with the application a certificate from the South Carolina Department of Health and Environmental Control, indicating compliance with the rules and regulations of such agency.

J. Exterior Illumination. All outdoor light fixtures shall be fully shielded and installed in such a way that no light is emitted above a horizontal plane running through the lowest part of the fixture. Low-pressure sodium should be used wherever possible. The pattern of light pooling from each light source shall be carefully considered to avoid throwing light onto adjacent properties. Light sources visible in residential or medical areas shall not exceed one-tenth-foot candles. Light sources visible in other areas shall not exceed one-half-foot candles. Measurements shall be in a vented plane at the property line.

K. Compliance Guarantee. The applicant of a permit for a manufacturing or processing plant which would produce any of the above “objectionable elements” shall acknowledge in writing his understanding of the performance standards applicable to the proposed use and shall submit with the permit application, an agreement to conform with such standards at all times. Any violation of the agreement shall constitute a violation of this title and shall be treated accordingly. Enforcement of this agreement shall be precipitated by complaint from any person allegedly aggravated by failure of the industrial use to comply with the provisions of this section. Where there is a potential problem in meeting any one of this performance criteria in this section, the applicant shall be required to mitigate to the satisfaction of the director of planning and facilities any potential adverse impacts of such operation and/or request a variance before the board of zoning appeals in accord with the provisions of Chapter 14.36. (Ord. 99-O-25 § 3.9, 1999)