The following minimum smoke, odorous matter and toxic matter standards must be complied with:

    A.    The density of emission of smoke during normal operations shall not exceed Standard Smoke Chart No. 2, and the quantity of smoke shall not exceed a maximum of ten smoke units per hour per stack.

    B.    The maximum permitted emission of dust relating to combustion for indirect heating from any source shall not exceed the maximum number of pounds of dust per million British Thermal Units heat input per hour as follows:

    The maximum permitted emission shall be 0.50 pounds per minimum size plants producing a heat input of ten million or less British Thermal Units per hour and 0.15 for maximum size plants producing a heat input of ten million or more British Thermal Units per hour. All intermediate values shall be determined from a straight line plotted on log graph paper.

    C.    The emission into the atmosphere of process dust or other particulate matter which is unrelated to combustion for indirect heating or incineration shall not exceed .050 pounds per one hundred (100) pounds of process weight or fifty (50) pounds for one hundred thousand (100,000) pounds of process weight. All intermediate values shall be determined from a straight line plotted on log graph paper.

    D.    The emission of odorous matter in such quantities as to be readily detectable at any point along lot lines or to produce a public nuisance or hazard beyond lot lines is prohibited.

    E.    The emission of toxic or noxious matter, whether solid, liquid or gaseous shall be so controlled that no concentration at or beyond lot lines shall be detrimental to or endanger the public health, safety, comfort and other aspects of the general welfare, or cause damage or injury to property. (Prior code § 19-1-12)