It is the purpose of these standards to assure that all lots, parcels, buildings or structures in all districts are used or occupied in a manner so as not to create any dangerous, injurious, noxious or otherwise objectionable elements or conditions so as to adversely affect adjacent properties or the surrounding area. Any use permitted by this Chapter may be undertaken and maintained if acceptable measures and safeguards are employed to limit dangerous and objectionable elements to accepted limits as established by the following performance requirements. If the operations of any lawful existing use at the date of adoption of this Chapter violates these environmental performance standards, such operations shall not be varied or changed in any way as to increase the degree of such violations.

Any activity involving the use or storage of flammable or explosive materials shall be protected by adequate fire-fighting and fire suppression equipment and by such safety measures and devices as are normally used in the handling of any such material. Such hazards shall be kept removed from adjacent activities to a distance which is compatible with the potential danger involved.

No activity shall emit dangerous radioactivity at any point, or unreasonable electrical or radio-electrical disturbance adversely affecting the operation of any equipment, other than that of the creator of such disturbance.

No vibration shall be permitted which is perceptible without instrument on any lot line of the lot on which the use is located.

Smoke shall not be emitted with a density greater than on the Ringlemen Chart as issued by the U.S. Bureau of Mines except for blow-off periods of ten (10) minutes duration of one (1) per hour when a density of not more than No. 2 is permitted.

Every use shall be so operated that no offensive or objectionable odor is emitted which is offensive so as to produce a public nuisance or hazard on any adjoining lot or property. Odors emitted from any operations shall comply with all applicable standards of the State of Missouri Department of Natural Resources and the U.S. Environmental Protection Agency.

No pollution of air by fly-ash, dust, vapors, or other forms of particulate matter shall be permitted which is harmful to health, animals, vegetation or other property or which causes soiling of exposed property. Air emissions from any operation shall comply with the State of Missouri Department of Natural Resources Air Quality Standards and the U.S. Environmental Protection Agency air quality standards.

No direct or reflected glare shall be permitted which is visible from any property or from any public street, road or highway. Any operation producing intense glare or heat shall be performed in an enclosure in such a manner as to be imperceptible without instruments along any lot line of the lot upon which the building is constructed.

Noise which is objectionable due to volume, frequency or heat shall be muffled or otherwise controlled so that there is no production of sound discernible at lot lines in excess of the average intensity of street and traffic noise at the lot lines. Air raid sirens and related apparatus used solely for public purposes shall be exempt from this requirement. The L-10 noise level (that level which is exceeded ten percent (10%) of the time) shall not exceed the following measurements at any point at the property line of the lot on which the noise is generated.

Pollution of streams and other bodies of water shall be subject to such requirements and regulations established by the State of Missouri, Department of Natural Resources (Water Quality Standards — 10CSR 20-7.031) and the U.S. Environmental Protection Agency (USEPA).