Smoke, dust, fumes, vapor and gas control. The emission of dust, dirt, fly ash, fumes, vapors or gases which cause any damage to human health, to animals or to vegetation or other forms of property or which can cause soiling or staining of persons or property at any point beyond the lot line of the use creating such emission is hereby prohibited. No emission of liquid or solid particulate from any chimney or stack or otherwise shall exceed three hundredths (0.03) grains per cubic foot of the covering gas at any point beyond the lot line of the use creating the emission. Identical processes or facilities may be compared to determine compliance with this subsection. For measurement for the amount of particles discharged as set forth above, measurement procedures shall follow those then employed by the Pennsylvania Department of Environmental Protection for similar or identical measurements.