75A - PH BRISTOL ST MEMORY LN PROJECT

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ENVIRONMENTAL IMPACT REPORT ADDENDUM Bristol Street and Memory Lane Intersection Improvements — Project No. 17-6883 The Project's design concept and scope have not changed significantly from what was analyzed in the RTIP and FTIP. This analysis found that the plan and, therefore the individual projects contained in the plan, are conforming projects and would have air quality impacts consistent with those identified in the SIPS for achieving the NAAQS. The FHWA determined the RTIP to conform to the SIP. The proposed widening of Bristol Street, from Memory Lane to 17" Street has been included in the FTIP since 1992. The FTI' gives priority to eligible Transportation Control Measures (TCMs) identified in the SIP and provides sufficient funds to provide for their implementation. The FHWA determined the FTIP to conform to the SIP on December 16, 2016. No significant impacts would occur. Implementation of the proposed Project would not result in greater impacts than previously analyzed in the 1990 FEIS/EIR. Furthermore, the South Coast Air Basin (SCAB) is designated by the state and US Environmental Protection Agency (EPA) as nonattainment for ozone (Os), and particulate matter 2.5 microns in diameter or less (PM2.5) and attainment/maintenance for carbon monoxide (CO) and particulate matter 10 microns in diameter or less PMui. The South Coast Air Quality Management District (SCAQMD) developed regional emissions thresholds to determine whether or not a project would contribute to air pollutant violations. If a project exceeds the regional air pollutant thresholds, then the project would substantially contribute to air quality violations in the SCAB. In addition, a project would also contribute to air pollutant violations if localized emissions result in an exceedance of the ambient air quality standards (AAQS). The proposed Project would be consistent with the Major Arterial designation of the City of Santa Ana General Plan Circulation Element and the County of Orange's Master Plan of Arterial Highways. Additionally, the Project would improve traffic flow, maintain vehicle capacity, reduce idling and result in a reduction in air pollutant emissions as was previously analyzed in the 1990 FEIS/EIR. Thus, no new or substantial increase of impacts have been identified and no new mitigation measures are required. Certified 1990 FEIS/EIR Mitigation Measures: No 1990 FEIS/EIR mitigation measures are applicable Mitigation Measures: No additional new mitigation measures are required. b) Violate any air quality standard or contribute substantially to an existing or projected air quality violation? All proposed areas of acquisition include vacant portions of commercial and multi -family residential properties. These vacant areas consist of dirt, paving/asphalt or ornamental landscaping. The Project proposes to change the existing street section from a total ROW width of 100 feet to 111 feet, which is a nominal increase over what was previously analyzed in the 1990 FEIS/EIR. No structure modification/demolition would be required as part of these new partial acquisitions to accommodate the Project. As determined in the 1990 FEIS/EIt, short-term construction emissions from the Project would be below the SCAQMD's significance thresholds for all criteria pollutants, including PM10 and PM2.5, even in the absence of specific dust reduction measures. Construction phasing for the proposed Project would be similar to the construction activities and phasing described in the 1990 FEIS/EIR for the Project. Therefore, the construction emissions would be similar to those in the 1990 FEIS/EIR. It has been determined that construction emissions would not violate any air quality standard or contribute substantially to an existing or projected air quality violation. Thus, impacts are considered less than significant. Because emissions were found to be below the SCAQMD's significance thresholds, Project related construction emissions are not considered by the SCAQMD to result in a significant air quality impact. In addition, mitigation measures included in the 1990 FEIS/EIR would further reduce construction -related air quality impacts. The proposed Project would improve traffic flow and reduce idling, as the Project would add one additional through lane and this configuration was analyzed in the 1990 FEIS/EIR. The modifications to the 1990 FEIS/EI2 would add more ROW to the existing right -turn lane and serve to increase traffic flow through the intersection, but would not increase the overall road capacity, previously considered lane configuration, or air quality impacts disclosed in the 1990 FEIS/EIR. The proposed Project would result in the same operational air emissions as that considered in the 1990 FEIS/EIR, which were below SCAQMD thresholds. Thus, no new or substantial increase of impacts have been identified and no new mitigation measures are required. Draft I November 2017 3-5 Environmental Consequences 75A-34