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One Broadway Plaza Environmental Impact Report Findings and Facts in Support of Findings . Specific economic, legal, social, technological or other considerations, including provision of employment opportunities for highly trained workers, make infeasible the mitigation measures or project alternatives identified in the Final EIR. 4.1 POTENTIALLY SIGNIFICANT ADVERSE IMPACTS OF THE ONE BROADWAY PLAZA PROJECT WHICH CANNOT BE MITIGATED TO BELOW A LEVEL OF SIGNIFICANCE Potentially significant adverse impacts of the One Broadway Plaza project which cannot be mitigated to below a level of sigriificance are described in this Section. The City of Santa Ana City Council finds that these potentially significant adverse impacts of the project would not be mitigated to below a level of significance, after implementation of the mitigation measures. A Statement of Overriding Considerations (SOC) has been prepared to address these unavoidable significant adverse impacts of the project. 4.1.1 Impacts Related to Short Tenn Air Quality Impacts 4.1.1.1 Potentially Significant Adverse Impact Related to Construction NO! and PMlQ Emissions As described in detail in Section 3.4 (Air Quality) in the EIR, the One Broadway Plaza project will result in significant adverse NOx and PMlO emissions as a result of the use of construction equipment and the generation of dust during construction. 4.1.1.2 Finding Related to Construction NO! and PMlO Emissions Changes or alterations have been required in, or incorporated into, the project which avoid or substantially lessen the significant environmental effect as identified in the EIR. 4.1.1.3 Facts in SUDport of the Finding Related to Construction NO! and PMlQ Emissions Implementation of mitigation measures AQ-l to AQ-15, below, will substantially lessen the adverse construction impacts of the One Broadway Plaza project related to NOx and PM 10. However, these measures will not reduce this significant adverse impact of the project to below a level of significance. AQ-l Use low-e~ission mobile construction equipment where feasible. AQ-2 Water site and clean equipment morning and evening to comply with AQMD Fugitive Dust Measures BCM-03 and BCM-06. As part of the conditions of grading pennit approval, the project shall water the construction site and unpaved haul roads (with use of reclaimed water or chemical soil binder, where feasible) twice daily. AQ-3 Wash off trucks leaving the site to comply with AQMD Fugitive Dust Measure BCM- 01. As part of the conditions of grading pennit approval, project construction contractors shall wheel wash construction equipment and cover dirt in trucks during on- U/vfregoso/wp5 J /reports/One Broadway final findings June 28, 2004 Page 9