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The SEIR evaluates the impact of the proposed project related to the exposure of <br />residents to excessive exterior and interior noise resulting from train noise events. <br />Significance Before Mitigation: Significant <br />Significance After Mitigation: Less than Significant <br />Finding: Changes or alterations have been required in or incorporated into the <br />Project that would avoid or substantially lessen the significant environmental <br />effect as identified in the SEIR. Mitigation Measure 4.J-3 which is required in or <br />incorporated into the Project, will reduce the significant environmental impact to a <br />less than significant level. <br />Facts in Support of Finding: The following facts and mitigation measures indicate <br />that the impact will be reduced to less than significant. <br />1.Train-related noise exposure at Sites 8, 11, 14, 18, and 21, <br />which are in close proximity to the UPRR mainline tracks, may exceed the <br />applicable 70 dB Ldn exterior noise exposure limit and 50 dB Lmax/55 dB Lmax <br />criteria within habitable rooms. As a result, this impact would be potentially <br />significant. <br />2.Implementation of Mitigation Measure 4.J-3 set forth in <br />Table 6-1 of the Final SEIR and listed in the MMRP will ensure that Impact 4.J-3 <br />would be reduced to a less than significant level and is hereby incorporated by <br />reference and described below. <br />4.J-3: The City shall require project applicants (Sites 8, 11, 14, 18, and 21) to <br />conduct site-specific acoustical assessments to determine train-related noise <br />exposure, impact, and mitigation. Recommendations in the acoustical <br />assessment shall be sufficient to satisfy the applicable City of Pleasanton 70 dB <br />Ldn and 50/55 dB Lmax exterior and interior noise exposure criteria, respectively, <br />using appropriate housing site design and building construction improvements. <br />Site(s) affected: Sites 8, 11, 14, 18, 21 <br />Draft SEIR, pp. 4.J-19 to 4.J-20.) <br />Impact 4.J-5 <br />Development facilitated by the General Plan Amendment and rezonings could <br />potentially generate additional traffic on local area roadways and associated increases in traffic <br />noise exposure relative to existing conditions. <br />The SEIR evaluates the impact of the proposed project related to the exposure of <br />residents to traffic noise resulting from additional traffic on local area roadways. <br />Significance Before Mitigation: Significant <br />Significance After Mitigation: Less than Significant