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Chapter 4 Environmental Setting Impacts, and Mitigation Measures <br />Noise Levels in dBA CNEL at 50 feet <br />Increase <br />with Project <br />Year2030 <br />Year2030 <br />over <br />Exceeds <br />Existing <br />Without Project <br />With Project <br />Existing <br />Project <br />Significance <br />Significance <br />Roadway Segment <br />Conditions <br />Traffic Volumes <br />Traffic Volumes <br />Conditions <br />Contribution <br />Threshold^ <br />Threshold? <br />Santiago St -Santa <br />Ana Blvd to Civic <br />64.3 <br />65.2 <br />65.9 <br />1.6 <br />0.7 <br />5.0 <br />No <br />Center Dr <br />Civic Center Dr - <br />65.5 <br />66.0 <br />66.2 <br />0.7 <br />0.2 <br />3.0 <br />No <br />Santiago St to Lacy St <br />Civic Center Dr - <br />Lincoln Ave to <br />65.4 <br />66.0 <br />66.0 <br />0.6 <br />0.0 <br />5.0 <br />No <br />Santiago St <br />Santiago St -Santa <br />63.1 <br />63.5 <br />64.7 <br />1.6 <br />0.2 <br />5.0 <br />No <br />Ana Blvd to Brown St <br />Santa Ana Blvd- <br />65.3 <br />65.9 <br />66.6 <br />1.3 <br />0.7 <br />3.0 <br />No <br />Santiago St to Lacy St <br />Santa Ana Blvd - <br />68.0 <br />68.7 <br />69.0 <br />1.0 <br />0.3 <br />3.0 <br />No <br />Santiago St to U-24 <br />4th St -Santiago St to <br />64.5 <br />64.9 <br />65.0 <br />0.5 <br />0.1 <br />5.0 <br />No <br />Lacy St <br />Grand Ave-4th St to <br />721 <br />72.7 <br />72.8 <br />0.7 <br />0.1 <br />3.0 <br />No <br />Santa Ana Blvd <br />Grand Ave -Santa <br />71.4 <br />72.1 <br />72.5 <br />1.1 <br />0.4 <br />3.0 <br />No <br />Ana Blvd to 17th St <br />Santa Ana Blvd -East <br />62.8 <br />63.5 <br />63.5 <br />0.7 <br />0.0 <br />5.0 <br />No <br />of Grand Ave <br />Grand Ave-1 st St to <br />71.5 <br />72.0 <br />72.2 <br />0.7 <br />0.2 <br />3.0 <br />No <br />4th St <br />4th St -Grand Ave to <br />64.5 <br />65.0 <br />65.5 <br />1.0 <br />0.5 <br />5.0 <br />No <br />Santiago St <br />4th St -East of Grand <br />65.0 <br />65.6 <br />65.8 <br />0.8 <br />0.2 <br />3.0 <br />No <br />Ave <br />Grand Ave -South of <br />72.4 <br />73.1 <br />73.3 <br />0.9 <br />0.2 <br />3.0 <br />No <br />1 st St <br />1 st St -Standard Ave <br />73.8 <br />74.4 <br />74.6 <br />0.8 <br />0.2 <br />3.0 <br />No <br />to Grand Ave <br />1 st St -East of Grand <br />73.5 <br />73.9 <br />74.1 <br />0.6 <br />0.2 <br />3.0 <br />No <br />Ave <br />Penn Way -South of <br />63.8 <br />64.5 <br />65.0 <br />1.2 <br />0.5 <br />5.0 <br />No <br />1-5 SB Ramps <br />Penn Way -North of <br />66.5 <br />66.9 <br />67.2 <br />0.7 <br />0.3 <br />3.0 <br />No <br />1-5 SB Ramps <br />Santa Ana Blvd - <br />69.7 <br />70.1 <br />70.8 <br />1.1 <br />0.73.0 <br />No <br />West of 1-5 SB Ramps <br />4.8-30 City of Santa Ana Transit Zoning Code (SD 84A and SD 848) EIR <br />