The Dust Extinsion Moisture (DEM) of any material is that moisture where the material stops generating dust.
The stockpiles are continously moving while it is been feed or reclaim but there are areas where the material stays in hold for enough time to decrease the DEM level. While material gets dryer it starts generating dust and to keep it wet we can strategically mount Yard Sprays around a stockpile to increase this moisture and reduce the dust generation while the material is stocked.