Includes dry mixing plants. 

Code 4583 and Code 4665 “Rendering Works – NOC & Drivers” or Code 2089 “Packing House – All Operations” shall not be assigned to the same employer unless the operations described by these classifications are conducted as separate and distinct businesses. 

Code 4583 applies to employers engaged in manufacturing wet or dry fertilizers.  Raw materials used are ammonia, ammonia phosphate, anhydrous ammonia, ammonia sulfate, ammonia nitrate, phosphoric and nitric acids, natural gas, hydrogen, insecticides, catalysts, urea, super phosphates, potassium salts, potash, fungicides, and phosphate rock.  The washing, crushing and grinding of purchased phosphate rock is included under the scope of this classification.