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Impact 4.0-1 will be reduced to a less -than -significant level, and are hereby incorporated by reference and described below. Mitigation Measure 4.0 -la: To address nuisance impacts of construction activities within the EDZ area, all developers of sites within the EDZ area shall ensure that construction contractors implement the following: • Signs shall be posted at all construction site entrances to the property upon commencement of construction, for the purposes of informing all contractors/subcontractors, their employees, agents, material haulers, and all other persons at the applicable construction sites, of the basic requirements of Mitigation Measures 4.0-1 a and 4.0-1 b. o Signs shall be posted at the construction sites that include permitted construction days and hours, a day and evening contact number for the job site, and a contact number in the event of problems. o An onsite complaint and enforcement manager shall respond to and track complaints and questions related to noise. Site(s) affected: All sites within the proposed Zone. Mitigation Measure 4.0 -lb: To reduce daytime noise impacts due to construction within the EDZ area, all project developers shall require construction contractors working within 55 feet of the construction site property boundary to implement the following measures: • Equipment and trucks used for construction shall use the best available noise control techniques (e.g., improved mufflers, equipment redesign, use of intake silencers, ducts, engine enclosures, and acoustically -attenuating shields or shrouds). o Impact tools (e.g., jack hammers, pavement breakers, and rock drills) used for construction shall be hydraulically or electrically powered where feasible to avoid noise associated with compressed air exhaust from pneumatically powered tools. Where use of pneumatic tools is unavoidable, an exhaust muffler on the compressed air exhaust shall be used; this muffler can lower noise levels from the exhaust by up to about 10 dBA. External jackets on the tools themselves shall be used where feasible; this could achieve a reduction of 5 dBA. Quieter procedures, such as use of drills rather than impact tools, shall be used unless deemed not feasible by a geotechnical investigation. Site(s) affected: All sites within the proposed Zone. (Draft SEIR, pp. 4.0-13 to 4.0-14.) Impact 4.0-7 Development within the area of the proposed Zone would be exposed to stationary 21