20A - AA FIRST ST BRIDGE REPLACEMENT PROJECT

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LSA ASSOCIATES, INC. INITIAL STUDY/MITIGATED NEGATIVE DECLARATION JULY 2010 FIRST STREET BRIDGE REPLACEMENT PROJECT CITY OF SANTA ANA C. Does the project have environmental effects which will cause substantial adverse effects on human beings, either directly or indirectly? Less than significant impact with mitigation. No adverse environmental impacts are anticipated with implementation of the proposed project. The proposed project is limited to the bridge replacement and widening of First Street to match the existing width of 6 lanes at the east and west end of the project limits. The proposed project will bring First Street into compliance with the Orange County Master Plan of Arterial Highways. All of these activities are anticipated to have a minimal impact on the environment and will occur on an already developed and urbanized site. Although the project is a bridge replacement and street widening, it will not add a significant amount of pollutants to the site. A bridge already exists at the project site, and the addition of two travel lanes to First Street will relieve traffic congestion in the area but will not affect humans to any greater extent. Construction nuisance impacts related to air quality, water quality, and potential hazardous waste emissions will be reduced to a level below significance through the implementation of the identified Mitigation Measures and compliance with City standards. Therefore, all potential project impacts are less than significant with the implementation of the identified Mitigation Measures and the project would not have an adverse direct or indirect effect on human beings. 07/25/10 «P:\DMJ0701\MND\4.0 Environmental Analysis.doc» 4-45 20A-96