2017-046 - Approving Addendum Nos. 1 and 2

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Santa Ana/Garden Grove Fixed Guideway Project Addendum quality impact, increase in the severity of an impact, or new mitigation measure would be required associated with implementation of the proposed design modifications. In terms of long-term, operational air quality and greenhouse gas emissions impacts, with the exception of an increased maximum speed in the PE ROW and the implementation of traffic signal priority, no changes to the operational characteristics are proposed that would affect the previous conclusions of "less than significant impact" for operational air quality and greenhouse gas emissions impacts. The Traffic Study Addendum v2 (provided in Appendix C), indicates that all roadway segments and intersections would operate at an acceptable LOS with the implementation of the traffic signal priority. Therefore, the conclusion that long-term impacts associated with localized CO concentrations (due to poor intersection LOS) would be less than significant would remain. No additional air quality or greenhouse gas emissions impacts would occur and the conclusions identified in the EIR remain accurate. Energy Resources The EIR identified a less than significant impact to Energy Resources as a result of the Project. This is attributed to the reduction of Vehicle Miles Traveled (VMT) that is anticipated with the operation of the streetcar. The proposed design modifications would not affect the anticipated ridership for the Project, therefore, there would be no new impact, or increase in the severity of an impact related to Energy Resources and the conclusions identified in the EIR remain accurate. Water Qualitv. Hvdroloqv, and Floodolains The potential water quality, hydrology, and floodplains impacts associated with the construction and operation of the Project were evaluated in the EIR. The EIR determined that impacts to these resources would be less than significant related to water quality, water discharge, stormwater runoff and as related to alteration of drainage patterns. As described previously, some of the proposed design modifications involve changes to the proposed drainage improvements. Appendix P (Drainage Technical Report) of the EIR, described storm drain improvements on many streets outside the Project alignment. However, modification of scope of drainage improvements is proposed in order to rely less on connections to the existing storm drain network and, instead, use surface conveyance in streets to maintain existing drainage patterns to the maximum extent practicable while addressing surface storm water drainage needs generated by the Project, or change in drainage patterns caused solely by the Project. The proposed design modifications to the drainage plan for the Project would not result in the increase in a new impact related to hydrology, increase in the seventy of an impact related to hydrology, or require new mitigation measures in order to address drainage and/or hydrology impacts. The EIR identifies that the Project would be required to comply with BMPs to address pollutants of concern and hydrologic conditions of concern associated with the Project's stormwater runoff. With implementation of the BMPs, the Project would result in less than significant impacts to water quality, water discharge, and stormwater runoff. The implementation of BMPs would be applicable to the design modifications. Further, design modifications such as changing the single track bridge to a double track bridge over the Santa Ana River would not increase impervious surfaces, as the underlying channel is concrete lined. Therefore, the construction and operation of the Project would be the same as evaluated in the EIR. No additional water quality, hydrology, or floodplains impact would occur and the conclusions that impacts to these environmental resource areas are less than significant as identified in the EIR remain accurate. Safety and Security This environmental resource issue area is only applicable to the analysis pursuant to the NEPA, and no further analysis is warranted in this CEQA Addendum. 141P age 1170726.1