[Z.O., § 8.01.01]
No land or building in any district shall be used or occupied in any manner so as to create any dangerous, injurious, noxious or otherwise objectionable fire, explosive or other hazard; noise or vibration; smoke, dust, odor or other form of air pollution; heat, cold, dampness, electrical or other substance, condition or element in such a manner or in such amount as to adversely affect the surrounding area of adjoining premises (referred to herein as "dangerous or objectionable elements"); provided, that any use permitted or not expressly prohibited by this chapter may be undertaken and maintained if it conforms to the regulations of this division limiting dangerous and objectionable elements at the point of the determination of their existence.
[Z.O., § 8.01.02]
Only those uses specified in the I-2 district, as subject to performance standards, and uses accessory thereto, are subject to performance standards procedure specified in obtaining a zoning certificate, unless the zoning inspector has reasonable grounds to believe that another proposed use is likely to violate performance standards, in which event the applicant shall comply with performance standards procedure in obtaining a zoning certificate.
[Z.O., § 8.01.03]
Even though compliance with performance standards procedure in obtaining a zoning certificate is not required for a particular use, initial and continued compliance with performance standards is required of every use, and provision for enforcement of continued compliance with performance standards shall be invoked by the zoning inspector or board as the case may be, against any use, if there are reasonable grounds to believe that performance standards are being violated by such use.
[Z.O., § 8.01.04]
Certain uses established before the effective date of this chapter and nonconforming as to performance standards shall be given a period of three years in which to conform therewith.
[Z.O., § 8.01.05]
(a) 
The determination of the existence of any dangerous and objectionable elements shall be made at the location of the use creating the same and at any points where the existence of such elements may be more apparent (herein referred to as "at any point"); provided, however, that the measurements necessary for enforcement of performance standards set forth in this division shall be taken at different points in different districts in relation to the establishment or use creating the element being measured (herein referred to as "point of measurement") as follows:
(1) 
In any R district and C-1 district: 25 feet from the establishment or use, or at the lot line of the use if closer to the establishment or use.
(2) 
In C-2, C-3, I or A districts: At the boundary or boundaries of the district, or at any point within an adjacent R district.
[Z.O., § 8.01.06.01]
All activities involving, and all storage of, inflammable and explosive materials shall be provided at any point with adequate safety devices against the hazard of fire and explosion and adequate firefighting and fire suppression equipment and devices standard in the industry. Burning of waste materials in open fires shall be prohibited at any point. The relevant provisions of the state and local laws and regulations shall also apply.
[Z.O., § 8.01.06.02]
No activities shall be permitted which emit dangerous radioactivity at any point, or electrical disturbance adversely affecting the operation at any point of any equipment other than that of the creator of such disturbance, nor shall radio transmitters or other electrical interference be permitted if they create disturbances with radio or television reception in any R district.
[Z.O., § 8.01.06.03]
At the points of measurement specified in Section 26-185 the sound pressure level of noise radiated from a facility at night time shall not exceed 40 decibels or the average sound level of the street traffic noise nearest the noise generator, whichever is the higher, in any octave band of frequency above 300 cycles per second. The sound pressure level shall be measured with a sound level meter and an octave band analyzer that conform to the specifications published by the American Standards Association. Noise shall be so muffled or otherwise controlled, so as not to become objectionable, due to intermittence, beat frequency, impulsive character (hammering, etc.) periodic character (humming, screeching, etc.), or shrillness. For facilities which radiate noise only during a normal daytime working shift, the allowable decibel sound level given above shall be increased 25 decibels, or 10 decibels above the average sound level of the street traffic noise nearest the noise generator, whichever is the higher. Sirens, whistles, bells, etc., which are maintained and utilized solely to serve a public purpose (such as fire and air raid warning sirens) are excluded from the above regulations.
[Z.O., § 8.01.06.04]
No vibration shall be permitted which is discernible without instruments at the points of measurement specified in Section 26-185.
[Z.O., § 8.01.06.05]
No emission shall be permitted at any point, from any chimney or otherwise, of visible grey smoke of a shade equal to or darker than No. 2 on the Power's Micro-Ringlemann Chart, published by McGraw-Hill Publishing Company, Inc., and copyrighted 1954 (being a direct facsimile reduction of the standard Ringlemann Chart as issued by the United States Bureau of Mines), except that visible grey smoke of a shade equal to No. 2 on such chart may be emitted for four minutes in any 30 minutes. These provisions applicable to visible grey smoke shall also apply to visible smoke of a different color but with an apparently equivalent capacity.
[Z.O., § 8.01.06.07]
(a) 
No emission shall be permitted of odorous gases or other odorous matter in such quantities as to be offensive at the points of measurement specified in Section 26-185. Any process which may involve the creation or emission of any odors shall be provided with a secondary safeguard system, so that control will be maintained if the primary safeguard system should fail.
(b) 
There is hereby established as a guide in determining such quantities of offensive odors Table III, Odor Thresholds, in Chapter 5, Air Pollution Abatement Manual, copyright 1951 by Manufacturing Chemists' Association, Inc., Washington, D.C.
[Z.O., § 8.01.06.07]
No emission shall be permitted which can cause any damage to health, to animals, vegetation or other forms of property, or which can cause any excessive soiling, at any point; and in no event any emission, from any chimney or otherwise, of any solid or liquid particles in concentrations exceeding 0.3 grains per cubic foot of the conveying gas at any point. For measurement of the amount of particles in gases resulting from combustion, standard corrections shall be applied to a stack temperature of 500° F. and 50% excess air.
[Z.O., § 8.01.06.08]
No direct or sky-reflected glare shall be permitted, whether from floodlights or from high temperature processes such as combustion or welding or otherwise, so as to be visible at the points of measurement specified in Section 26-185. This restriction shall not apply to signs otherwise permitted by the provisions of this chapter.
[Z.O., § 8.01.06.09]
No discharge at any point into any public sewer, private sewage disposal system or stream, or into the ground shall be permitted, except in accord with standards approved by the state department of health or standards equivalent to those approved by such department for similar uses, of any materials of such nature or temperature as can contaminate any water supply or otherwise cause the emission of dangerous or offensive elements.