| Abstract |
The report describes a study of air pollutants emitted by the mixed fertilizer industry, consisting of three types of mixing plants: ammoniation/granulation (A/G) (195 plants), bulk blend (5,640 plants), and liquid mix (2,768 plants). The potential environmental effect of this source was evaluated, using source severity (defined as the ratio of the maximum ground-level concentration of an emission to the ambient air quality standard for criteria pollutants or to a modified TLV for non-criteria pollutants). Source severity factors for particulate emissions from A/G, bulk blend, and liquid mix plants are 0.1, 0.14, and 0.01, respectively. Severity factors for ammonia from A/G and liquid mix plants are 0.26 and 0.01, respectively. A/G plants (excluding diammonium phosphate plants) produced 45% of all mixed fertilizers in 1973; bulk blend and liquid mix plants produced 32% and 23%, respectively. Primary emissions from A/G plants are NH3 and particulates. Only particulates are emitted from bulk blend plants. Primary emissions from liquid mix plants are NH3 and particulates. Each of the emission values (for each pollutant from each source) is less than 0.1% of the corresponding national emissions of that material from all stationary sources. |
