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LSA ASSOCIATES, INC. INITIAL STUDY/MITIGATED NEGATIVE DECLARATION <br />JULY 2010 FIRST STREET BRIDGE REPLACEMENT PROJECT <br />CITY OF SANTA ANA <br />C. Does the project have environmental effects which will cause substantial adverse effects on <br />human beings, either directly or indirectly? <br />Less than significant impact with mitigation. No adverse environmental impacts are anticipated <br />with implementation of the proposed project. The proposed project is limited to the bridge <br />replacement and widening of First Street to match the existing width of 6 lanes at the east and west <br />end of the project limits. The proposed project will bring First Street into compliance with the Orange <br />County Master Plan of Arterial Highways. <br />All of these activities are anticipated to have a minimal impact on the environment and will occur on <br />an already developed and urbanized site. Although the project is a bridge replacement and street <br />widening, it will not add a significant amount of pollutants to the site. A bridge already exists at the <br />project site, and the addition of two travel lanes to First Street will relieve traffic congestion in the <br />area but will not affect humans to any greater extent. Construction nuisance impacts related to air <br />quality, water quality, and potential hazardous waste emissions will be reduced to a level below <br />significance through the implementation of the identified Mitigation Measures and compliance with <br />City standards. Therefore, all potential project impacts are less than significant with the <br />implementation of the identified Mitigation Measures and the project would not have an adverse <br />direct or indirect effect on human beings. <br />07/25/10 «P:\DMJ0701\MND\4.0 Environmental Analysis.doc» <br />41 ' eI, <br />4-45 <br />