2017-046 - Approving Addendum Nos. 1 and 2

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Santa Ana/Garden Grove Fixed Guideway Project Addendum Hazardous Materials The potential hazardous materials impacts associated with the construction and operation of the Project was evaluated in the EIR. Since the certification of the EIR, there have been no changes to the hazardous materials environment or changes to the characteristics of the proposed project as evaluated in the EIR that would affect hazardous materials. As previously identified in the EIR, the Project would require limited acquisition or property which could have the potential to contain hazardous materials. Three properties identified as potentially hazardous sites would be acquired as part of Operations & Maintenance (0&M) Facility Site B (which is the currently proposed location for the 0&M facility). As described in the EIR, a detailed Phase I Environmental Site Assessment would be required to ascertain if employees working at the 0&M Facility would be exposed to toxic levels of hazardous materials. The EIR recommended implementation of Mitigation Measure HAZ1 to reduce this potential impact to a level less than significant. Because the proposed design modifications do not involve a change with respect to the location of the proposed 0&M Facility Site B, the conclusions regarding hazardous materials would remain the same. The EIR indicates that operation of the streetcar along the Project alignment would not involve the use of hazardous materials. As stated previously, no change to streetcar maintenance activities is proposed as part of the design modifications, therefore, no new significant impact or the increase in the severity of a significant impact would result. The conclusions that the potential hazardous materials impact would be reduced to a level of less than significant with the implementation of Mitigation Measure HAZ1 as identified in the EIR remain accurate. Traffic and Parking The potential traffic and parking related impacts associated with the construction and operation of the proposed Project were evaluated in the EIR. Since the certification of the EIR, there have been some changes to the transportation network within the Project area. Also, as described under "Description of Design Modifications," some of the design modifications were determined to have the potential to impact traffic, and further analysis was warranted. In order to address the potential traffic impacts associated with the design modifications, an addendum to the previously -prepared traffic study, which was provided as Appendix I to the EIR was prepared (see OC Streetcar Santa Ana -Garden Grove Project Traffic Study Addendum provided in Appendix C). The purpose of the analysis was to identify any changes to traffic impacts that were previously disclosed in the EIR, due to several design modifications with the advancement of engineering since the Project (and conceptual design) was approved in 2015. The five design modifications addressed in the addendum to the traffic analysis consists of • Reclassification of Santa Ana Boulevard • Relocation of Santa Ana Boulevard Stations • Fairview Street Grade Crossing Analysis • Traffic Signal Priority for the Streetcar • Street Design Concept for Santa Ana Boulevard The supplemental traffic analysis was prepared in accordance with City of Santa Ana requirements and the Orange County Congestion Management Program (CMP) (OCTA 2015) requirements. Reclassification of Santa Ana Boulevard. Santa Ana Boulevard between Raiff Street and Shelton Street would be reclassified from a four -lane undivided roadway to a two-lane roadway (divided with a center left turn lane or raised median with left -turn pockets). Table 3-1 of the supplemental traffic analysis (see Appendix C), provides the 9 1 P age 1170726.1