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Section 5 <br />The Monitoring Well would have a 24-foot high temporary sound barrier <br />around the perimeter of the Monitoring Weil construction area and would <br />also have an 8-foot high sound blanket located on the north and east <br />sides of the air compressor. <br />Construction Phasing Design Features <br />To further minimize noise impacts, the following design features would be <br />incorporated into the construction activities for the Mid Basin Centennial Park <br />Injection Well Project. <br />• To minimize potential noise during the day when school would in session <br />at Godinez High School, Mitchell Developmental School and Centennial <br />Education Center, the construction of the water supply pipeline and back <br />wash pipeline would occur at night. <br />• The Heritage Museum site improvements would occur when school is not <br />in session at Mitchell Development School and Godinez High School. <br />• The construction of the monitoring well sound wall at the Heritage <br />Museum would occur when school is not in session at Mitchell <br />Development School and Godinez High School. <br />• The construction of the MBI-5 Well sound wall would occur when school is <br />not in session at Centennial Education Center and Godinez High School. <br />• Paving activities at Centennial Park would be coordinated with Santa Ana <br />Unified School District and Centennial Education Center to minimize noise <br />impacts. <br />• Well redevelopment maintenance activities for MBI-2, MBI-4 and the <br />monitoring well would occur when school is not is session. <br />The following analysis identifies the noise levels that would be generated from <br />the construction activities for the Proposed Project and the Project Alternatives. <br />Alternative 2: Proposed Project <br />Phase I Construction Activities <br />The Phase 1 construction activities includes construction of water supply pipeline <br />along Edinger Avenue Bridge, construction of water supply pipeline along <br />Edinger Avenue, construction of water supply and back flush pipeline and the <br />construction two shared recreation/communication structures within Centennial <br />Park and the Heritage Museum site improvements. To maintain circulation during <br />the day along the Centennial Park Loop Road, the Proposed Project has <br />incorporated a design feature that requires water supply pipeline and the back <br />flush pipeiin:e within Centennial Park to be constructed at night. <br />Mid Basin Centennial Park Project Final EIR 5-163 <br />