3 - The Bowery_PUBLIC COMMENT_RAMSEY

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11.0 Mitigation Monitoring and Reporting Program Avion Project SEIR Page 11-16 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. D. PREVIOUS MITIGATION (1998 EIR) Transportation/Circulation The project would be subject to conditions of approval consistent with the MMRP for the 1998 EIR. Specifically, prior to the issuance of any building permit, the project is required to be in conformance with the Black Mountain Ranch Transportation Phasing Plan. Air Quality The 1998 EIR incorporated mitigation measures that would reduce fugitive dust impacts from construction activity. Dust control during construction and grading operations would be regulated in accordance with the rules of the San Diego Air Pollution Control District. The following measures would reduce fugitive dust impacts: 1. All unpaved construction areas would be sprinkled with water or other acceptable San Diego County Air Pollution Control District (SDAPCD) dust control agents during dust-generating activities to reduce dust emissions. Additional watering or acceptable Air Pollution Control District dust control agents would be applied during dry weather or windy days until dust emissions are not visible. 2. Trucks hauling dirt and debris would be covered to reduce windblown dust and spills. 3. On dry days, dirt and debris spilled onto paved surfaces would be swept up immediately to reduce resuspension of particulate matter caused by vehicle movement. Approach routes to construction sites would be cleaned daily of construction-related dirt in dry weather.