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Avion Project SEIR Page S-40 Table S-1 Summary of Significant Environmental Impacts and Mitigation Measures Environmental Issue Impacts Mitigation Impact Level After Mitigation MM-AIR-1b: Blasting Dust Mitigation Plan The following protocols shall be performed to minimize the generation of visible dust during the hard rock blasting events:  The areas shall be heavily watered prior to the planned blasting. The amount of water applied shall depend on the size of the shot and composition of the materials exposed at the top of the shot (i.e., topsoil vs. hard rock).  A water truck shall be dedicated to pre-wet the ground surface.  Detergent, if necessary, shall be added to the water truck to reduce the surface tension of the water and promote soaking into the surface materials. The water used shall be confined to the area of the shot and not be allowed to migrate out of the work limits. Confinement of the water shall be achieved through use of earthen berms, ditches, or other containment features that shall prevent migration of the water outside the work area.  Once the boreholes are loaded with blasting agent, a final soaking shall occur just prior to the shot.