The owner or operator of any process equipment or operation shall maintain dust control of the plant premises and plant owned, plant leased or plant controlled access roads by paving, oil treatment or other suitable measures. Good operating practices shall be observed in relation to stockpiling, screen changing, and general maintenance to prevent dust generation and atmospheric entrainment. Good operating practices, including water spraying or other suitable measures, shall be employed to minimize dust generation and emission when bins are pulled. (Ord. 316 §21(b), 1970)