All uses in all districts shall conform in operation, location, and construction to the performance standards hereinafter specified.

At no point at the bounding property line of any use in the District shall the sound pressure level of any daytime operation or plant exceed the decibel limits specified in the octave band groups designated in the following table:

Octave Band Frequencies:

Corrections: The following corrections shall be made to the Table of Octave Band - Decibel limits in determining compliance with the noise level standards:

*Apply one correction only

“Daytime” shall refer to the hours between 7:00 a.m. and 7:00 p.m. on any given day.

“Bounding property line” shall be interpreted as being at the far side of any street, alley, stream, or other permanently dedicated open space from the noise source when such open space exists between the property line of the noise source and adjacent property. When no such open space exists, the common line between two parcels of property shall be interpreted as the bounding property line.

“Measurement of noise” shall be made with a sound level meter or octave band analyzer meeting the standards prescribed by the American Standards Association.

Exemptions: The following uses and activities shall be exempt from the noise level regulations herein specified:

No operation or use in any district shall cause, create, or allow the emission of air contaminates for more than three (3) minutes in any one (1) hour period, which at the emission point or within the bounds or [of] the property are:

The open storage and open processing operations, including on-site transportation movements which are the source of wind or airborne dust or other particulate matter; or which involves dust or other particulate air contaminant generating equipment such as, but not limited to, paint spraying, grain handling, sand or gravel processing or storage or sand blasting shall be so conducted that dust and other particulate matter so generated is located in concentrations exceeding fifty-four (54) grains per one thousand (1,000) cubic feet of air [sic].

No use shall be located or operated in any district which involves the emission of odorous matter from a source of operation where the odorous matter exceeds the threshold at the bounding property line or any point beyond the tract on which such use or operation is located.

The odor threshold as herein set forth shall be determined by observation by a person or persons. In any case, where uncertainty may arise or where the operator or owner of an odor-emitting use may disagree with the enforcing officer or where specific measurement of odor concentration is required, the method and procedures as specified by American Society for Testing Materials (A.S.T.M.D.) 1391-56 entitled Standard Method for Measurement of Odor in Atmospheres shall be used and a copy of A.S.T.M.D. 1391-57 is hereby incorporated by reference.

No use involving the manufacture or storage of compounds or products which decompose by detonation shall be permitted in any District except that chlorates, nitrates, perchlorates, phosphors, and similar substances and compounds in small quantities for use by industry, school laboratories, druggists, or wholesales may be permitted when approved by the Fire Department.

The storage and use of all flammable liquids and materials such as pyroxylin plastics, nitrocellulose film, solvents, and petroleum products shall be permitted only when such storage or use conforms to the standards and regulations of the Town.

No operation or use permitted in any district shall emit a concentration across the bounding property line of the tract on which such operation or use is located of toxic or noxious matter which will exceed ten percent (10%) of the concentration (exposure) considered as the threshold limit for an industrial worker as such standards are set forth by the Texas State Department of Health in Threshold Limit Values Occupational Health Regulations No. 3, a copy of which is hereby incorporated by reference.

No operation or use in any district shall at any time create earthborne vibration which, when measured at the bounding property line of the source of operation, exceeds the limits of displacement set forth in the following table in the frequency ranges specified:

No use or operation in any district shall be located or concentrated so as to produce intense glare or direct illumination across the bounding property line for a visible source of illumination nor shall any such light be of such intensity as to create a nuisance or detract from the use and enjoyment of adjacent property.

No use or operation shall discharge into the open, onto the ground, or into any drainway, open pit, or pond any waste materials, liquids, residue, or byproducts for storage, decomposition, disposal, or fill unless approved by the Building Official. Waste materials shall include all the forms of waste as found in Chapter 361 of the Texas Health and Safety Code.

In all districts, large animals (animals over two hundred 200 pounds) are limited to a maximum of three (3) per acre.

In all districts, swine are prohibited.